Storm Mode: Illinois

0 warnings total · 0 tornado warnings · 6 alerts including watches and advisories

Current alert feed · checked 12:38Z

Warnings in area

6 of 6 alerts

Frost AdvisoryJefferson; Wayne; Edwards; Wabash; Perry; Franklin; Hamilton; White; Jackson; Williamson; Saline; Gallatin; Union; Johnson; Pope; Hardin; Alexander; Pulaski; Massac; Gibson; Pike; Posey; Vanderburgh; Warrick; Spencer; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Crittenden; Lyon; Trigg; Caldwell; Union; Webster; Hopkins; Christian; Henderson; Daviess; McLean; Muhlenberg; Todd; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New MadridNWS Paducah KY · until 13:00Zadvisory · radar-alerts checked 12:38Z
Frost AdvisoryGreene; Macoupin; Calhoun; Jersey; Pike; Audrain; Osage; Callaway; Montgomery; Lincoln; Gasconade; Warren; St. Charles; St. LouisNWS St Louis MO · until 14:00Zadvisory · radar-alerts checked 12:38Z
Frost AdvisoryMontgomery; Bond; Fayette; Clinton; Marion; Washington; Randolph; Madison; St. Clair; Monroe; Franklin; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; ReynoldsNWS St Louis MO · until 14:00Zadvisory · radar-alerts checked 12:38Z
Frost AdvisoryKankakee; Livingston; Iroquois; Ford; Eastern Will; Lake; Porter; Newton; Jasper; BentonNWS Chicago IL · until 13:00Zadvisory · radar-alerts checked 12:38Z
Frost AdvisoryCarroll; Warren; Tippecanoe; Fountain; Vermillion; Parke; Putnam; Marion; Vigo; Clay; Owen; Morgan; Johnson; Sullivan; Greene; Monroe; Brown; Bartholomew; Knox; Daviess; Martin; Lawrence; Jackson; JenningsNWS Indianapolis IN · until 13:00Zadvisory · radar-alerts checked 12:38Z
Frost AdvisoryMcLean; Logan; De Witt; Piatt; Champaign; Vermilion; Sangamon; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; LawrenceNWS Lincoln IL · until 14:00Zadvisory · radar-alerts checked 12:38Z

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Map

Frost Advisory 6

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked 12:38Z. Data: NOAA/NWS, NOAA/SPC.

Agency warning geometry · no observed imagery displayed

North ↑

Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

Alert outlines: NOAA/NWS; cell points/observed segments: IEM/NEXRAD. A warning polygon is not a tornado footprint.

Lightning activity — GOES GLM

Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.

Public event region Aggregation interval Show density on map

Cached lightning observations have not loaded. An empty map is not zero lightning.

Cached lightning source details and text readings

Snow analysis — NOHRSC

Source-rendered snow depth and snow water equivalent for the lower 48. History changes this snow picture only; warnings and radar keep their own clocks.

Snow field Retained picture Show snow on the map

Stored snow depth · footprint valid 2026-10-18 06:00:00 UTC, picture retrieved 2026-10-18 12:23:04.796 UTC.

No NOHRSC picture displayed on the interactive map.

0 - 0.39 in
0.39 - 2.0 in
2.0 - 3.9 in
3.9 - 9.8 in
9.8 - 20 in
20 - 39 in
39 - 59 in
59 - 98 in
98 - 197 in
197 - 295 in
295 - 394 in
394 - 787 in

NOHRSC snow analysis for the lower 48; see the adjacent source legend and time qualification — NOAA/NWS/NOHRSC’s original picture and legend. No station or address value is inferred.

NOHRSC footprint times are metadata; pixel analysis time is not independently verified. Snow-depth pixels have previously differed from the footprint time. This is modeled/assimilated snow analysis, not a measurement at a place. Unshaded and no-data areas do not establish zero snow.

Snow pictures, retained history and source provenance

Change time or forecast product

Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)

Radar-derived cells (0) · current

Collector checked 12:37Z; feed generated 12:37Z. Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

Station and river observations (41)

Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

K06C · K06C · current · 12:15Z
K1H2 · K1H2 · current · 12:15Z
K3LF · K3LF · current · 12:15Z
KAJG · KAJG · current · 12:15Z
KALN · KALN · current · 11:50Z
KARR · KARR · current · 11:52Z
KBMI · KBMI · current · 11:56Z
KC75 · KC75 · current · 12:15Z
KCIR · KCIR · current · 12:15Z
KDEC · KDEC · current · 11:54Z
KDKB · KDKB · current · 12:15Z
KDPA · KDPA · current · 11:52Z
KFEP · KFEP · current · 12:15Z
KFOA · KFOA · current · 12:15Z
KFWC · KFWC · current · 12:15Z
KGBG · KGBG · current · 12:15Z
KHSB · KHSB · current · 12:15Z
KI63 · KI63 · current · 12:15Z
KIJX · KIJX · current · 12:15Z
KIKK · KIKK · current · 12:15Z
KJOT · KJOT · current · 12:15Z
KLOT · KLOT · current · 11:45Z
KM30 · KM30 · current · 12:15Z
KMDH · KMDH · current · 11:52Z
KMDW · KMDW · current · 11:53Z
KMLI · KMLI · current · 11:52Z
KMQB · KMQB · current · 12:15Z
KMWA · KMWA · current · 11:45Z
KOLY · KOLY · current · 12:10Z
KPIA · KPIA · current · 11:54Z
KPNT · KPNT · current · 12:15Z
KPPQ · KPPQ · current · 12:15Z
KPRG · KPRG · current · 12:15Z
KRPJ · KRPJ · current · 12:15Z
KRSV · KRSV · current · 12:15Z
KSAR · KSAR · current · 12:15Z
KSFY · KSFY · current · 12:15Z
KSLO · KSLO · current · 12:15Z
KSPI · KSPI · current · 11:52Z
KTIP · KTIP · current · 12:15Z
KUGN · KUGN · current · 11:51Z

Showing 41 of 41 listed sources. All surface stations and retained trends · All supported gauges and forecasts

Selected details

Surface station KSFY

current · Observed 2026-10-18 12:15:00 UTC · wind 7 kt · temperature 3.5 °C.

Station KSFY · -90.1101, 42.0454 (longitude, latitude).

Source checked 2026-10-18 12:30:05.095Z · current.

Station observations, not an address forecast or cyclone maximum wind. Maintenance-flagged, old and implausible reports are excluded by the existing parser; this is not independent NWS quality control.

Retained observations: 71; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-17 12:55:00 UTC.

Observed sustained wind · 71 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Temperature, dew point and pressure trends

Observed temperature · 71 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Observed dew point · 71 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Observed sea-level pressure: no readable observations.

Observed reports as a table (71)

Observed (UTC)	Wind / gust (kt)	From (° true)	Temperature / dew point (°C)	Pressure (mb)	Visibility (mi)
2026-10-17 12:55:00 UTC	0 / Not reported	Calm	-0.1 / -0.2	Not reported	10 or more
2026-10-17 13:15:00 UTC	0 / Not reported	Calm	0.5 / 0.3	Not reported	10 or more
2026-10-17 13:35:00 UTC	0 / Not reported	Calm	1.9 / 1.6	Not reported	10 or more
2026-10-17 13:55:00 UTC	0 / Not reported	Calm	2.9 / 2.5	Not reported	10 or more
2026-10-17 14:15:00 UTC	0 / Not reported	Calm	4.5 / 4	Not reported	10 or more
2026-10-17 14:35:00 UTC	0 / Not reported	Calm	5.2 / 4.1	Not reported	10 or more
2026-10-17 14:55:00 UTC	0 / Not reported	Calm	6.6 / 4.3	Not reported	10 or more
2026-10-17 15:15:00 UTC	3 / Not reported	170	7.7 / 2.4	Not reported	10 or more
2026-10-17 15:35:00 UTC	5 / Not reported	160	8.7 / 0.4	Not reported	10 or more
2026-10-17 15:55:00 UTC	4 / Not reported	150	9.1 / -1.7	Not reported	10 or more
2026-10-17 16:15:00 UTC	3 / Not reported	230	9.9 / -1.7	Not reported	10 or more
2026-10-17 16:35:00 UTC	6 / Not reported	250	10.2 / -0.5	Not reported	10 or more
2026-10-17 16:55:00 UTC	5 / Not reported	210	10.7 / -1.5	Not reported	10 or more
2026-10-17 17:15:00 UTC	6 / Not reported	210	11.1 / -3	Not reported	10 or more
2026-10-17 17:35:00 UTC	5 / Not reported	190	11.6 / -2.2	Not reported	10 or more
2026-10-17 17:55:00 UTC	5 / Not reported	220	12.3 / -0.9	Not reported	10 or more
2026-10-17 18:15:00 UTC	4 / Not reported	200	12.3 / -1	Not reported	10 or more
2026-10-17 18:35:00 UTC	7 / Not reported	200	12.7 / -1.7	Not reported	10 or more
2026-10-17 18:55:00 UTC	6 / Not reported	200	13.2 / -1.7	Not reported	10 or more
2026-10-17 19:15:00 UTC	5 / Not reported	210	13.5 / -2.2	Not reported	10 or more
2026-10-17 19:35:00 UTC	8 / Not reported	200	13.8 / -2.1	Not reported	10 or more
2026-10-17 19:55:00 UTC	7 / Not reported	210	13.9 / -1.7	Not reported	10 or more
2026-10-17 20:15:00 UTC	7 / Not reported	190	14 / -1.5	Not reported	10 or more
2026-10-17 20:35:00 UTC	7 / Not reported	210	14.3 / -1	Not reported	10 or more
2026-10-17 20:55:00 UTC	9 / Not reported	200	14 / -1	Not reported	10 or more
2026-10-17 21:15:00 UTC	7 / Not reported	190	14 / -1	Not reported	10 or more
2026-10-17 21:35:00 UTC	6 / Not reported	200	14 / -0.9	Not reported	10 or more
2026-10-17 21:55:00 UTC	6 / Not reported	200	13.7 / -0.1	Not reported	10 or more
2026-10-17 22:15:00 UTC	9 / Not reported	180	13.3 / -0.4	Not reported	10 or more
2026-10-17 22:35:00 UTC	5 / Not reported	190	12.8 / -0.4	Not reported	10 or more
2026-10-17 22:55:00 UTC	7 / Not reported	190	11.9 / -0.5	Not reported	10 or more
2026-10-17 23:15:00 UTC	7 / Not reported	190	10.6 / -0.3	Not reported	10 or more
2026-10-17 23:35:00 UTC	5 / Not reported	200	10.3 / -0.5	Not reported	10 or more
2026-10-17 23:55:00 UTC	5 / Not reported	190	10 / -0.7	Not reported	10 or more
2026-10-18 00:15:00 UTC	3 / Not reported	160	8.1 / -0.1	Not reported	10 or more
2026-10-18 00:35:00 UTC	4 / Not reported	170	5.8 / 0.3	Not reported	10 or more
2026-10-18 00:55:00 UTC	3 / Not reported	190	7.5 / 0.3	Not reported	10 or more
2026-10-18 01:15:00 UTC	4 / Not reported	170	7.2 / 0	Not reported	10 or more
2026-10-18 01:35:00 UTC	0 / Not reported	Calm	5.5 / 0	Not reported	10 or more
2026-10-18 01:55:00 UTC	3 / Not reported	160	5.1 / 0.5	Not reported	10 or more
2026-10-18 02:15:00 UTC	6 / Not reported	150	4.4 / 0	Not reported	10 or more
2026-10-18 02:35:00 UTC	6 / Not reported	160	4.7 / 0	Not reported	10 or more
2026-10-18 02:55:00 UTC	6 / Not reported	170	5.1 / 0	Not reported	10 or more
2026-10-18 03:15:00 UTC	6 / Not reported	170	5.3 / 0	Not reported	10 or more
2026-10-18 03:35:00 UTC	7 / Not reported	170	5.7 / 0.1	Not reported	10 or more
2026-10-18 03:55:00 UTC	6 / Not reported	170	5.5 / 0	Not reported	10 or more
2026-10-18 04:15:00 UTC	7 / Not reported	170	6 / 0.3	Not reported	10 or more
2026-10-18 04:35:00 UTC	7 / Not reported	150	5.8 / 0.2	Not reported	10 or more
2026-10-18 04:55:00 UTC	7 / Not reported	150	4.8 / 0	Not reported	10 or more
2026-10-18 05:15:00 UTC	6 / Not reported	150	3.9 / 0.1	Not reported	10 or more
2026-10-18 05:35:00 UTC	7 / Not reported	150	4.7 / 0.8	Not reported	10 or more
2026-10-18 05:55:00 UTC	6 / Not reported	150	4.4 / 0.3	Not reported	10 or more
2026-10-18 06:15:00 UTC	5 / Not reported	150	3.6 / 0.5	Not reported	10 or more
2026-10-18 06:35:00 UTC	5 / Not reported	150	3.9 / 0.8	Not reported	10 or more
2026-10-18 06:55:00 UTC	5 / Not reported	160	4 / 0.9	Not reported	10 or more
2026-10-18 07:15:00 UTC	5 / Not reported	160	4.4 / 0.8	Not reported	10 or more
2026-10-18 07:35:00 UTC	6 / Not reported	160	4.3 / 0.7	Not reported	10 or more
2026-10-18 07:55:00 UTC	7 / Not reported	160	4.4 / 0.8	Not reported	10 or more
2026-10-18 08:15:00 UTC	6 / Not reported	170	4.6 / 1	Not reported	10 or more
2026-10-18 08:35:00 UTC	6 / Not reported	160	4.3 / 0.6	Not reported	10 or more
2026-10-18 08:55:00 UTC	6 / Not reported	170	4.2 / 0.7	Not reported	10 or more
2026-10-18 09:15:00 UTC	7 / Not reported	160	4 / 0.8	Not reported	10 or more
2026-10-18 09:35:00 UTC	5 / Not reported	160	3.8 / 0.7	Not reported	10 or more
2026-10-18 09:55:00 UTC	6 / Not reported	150	3.8 / 0.8	Not reported	10 or more
2026-10-18 10:15:00 UTC	6 / Not reported	150	3.6 / 1	Not reported	10 or more
2026-10-18 10:35:00 UTC	5 / Not reported	160	3.5 / 1	Not reported	10 or more
2026-10-18 10:55:00 UTC	7 / Not reported	160	3.6 / 1.2	Not reported	10 or more
2026-10-18 11:15:00 UTC	7 / Not reported	160	3.7 / 1.1	Not reported	10 or more
2026-10-18 11:35:00 UTC	7 / Not reported	160	3.7 / 1.2	Not reported	10 or more
2026-10-18 11:55:00 UTC	8 / Not reported	150	3.4 / 1.2	Not reported	10 or more
2026-10-18 12:15:00 UTC	7 / Not reported	160	3.5 / 1.2	Not reported	10 or more

Capture times, quality and provenance

Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.

Observed 2026-10-17 12:55:00 UTC, captured 2026-10-17 13:00:09.198Z; source body SHA-256 aa321e5db523e4ae79b5eb84e3edd54688a5b7f83f8b9534cd752d4abe9a07e1.
Observed 2026-10-17 13:15:00 UTC, captured 2026-10-17 13:30:06.013Z; source body SHA-256 b5c4ca6c0a5dfb11c059a2d4ccce7923dd869d39f2bc88b7080b8db54b05de6b.
Observed 2026-10-17 13:35:00 UTC, captured 2026-10-17 13:45:07.312Z; source body SHA-256 ae2fd339e3db840f298714215d70bd5d59e6875ebe4950cd99dc5f00d921b137.
Observed 2026-10-17 13:55:00 UTC, captured 2026-10-17 14:00:06.148Z; source body SHA-256 eddc6593eb288cbf6f6e163ab9b2a8e2d83da18452c1b5ac1e3855ebb2db91be.
Observed 2026-10-17 14:15:00 UTC, captured 2026-10-17 14:30:10.654Z; source body SHA-256 3eb08494e0ad69902726856334e3d7b274b3b0fd97ce988463f0dd20e757de9f.
Observed 2026-10-17 14:35:00 UTC, captured 2026-10-17 14:45:08.203Z; source body SHA-256 d8f30f9f8cf3b7a47222fb2f314ac9318b3d3079009e45d8e7d36b75d32439a1.
Observed 2026-10-17 14:55:00 UTC, captured 2026-10-17 15:00:06.490Z; source body SHA-256 fd6f39df63ed66d82a0d722d3ba639a811bb9e87f6416735ea4ec817c4b69f7b.
Observed 2026-10-17 15:15:00 UTC, captured 2026-10-17 15:30:05.805Z; source body SHA-256 04ddddc39c74dc78ca7472e6371d50741ec1ed3c05a6510175b1eadce1fc59e6.
Observed 2026-10-17 15:35:00 UTC, captured 2026-10-17 15:45:05.420Z; source body SHA-256 5096c4f26050a27798b083ae67f9d17cef7044f9e7fbe0c0f4b8bc6751e6e48d.
Observed 2026-10-17 15:55:00 UTC, captured 2026-10-17 16:00:07.184Z; source body SHA-256 011c3be17b8bb37fe5f6ec9648267ed81c7e9853e6a8b98b8ad0bb065dff5968.
Observed 2026-10-17 16:15:00 UTC, captured 2026-10-17 16:30:06.505Z; source body SHA-256 74db22068716b46ae200c534183191486eca0eae11ae75373344b2be1b05dbc6.
Observed 2026-10-17 16:35:00 UTC, captured 2026-10-17 16:45:06.856Z; source body SHA-256 b0d5a15c7093ea45183076725714c0c630e9449149641a0e182f809ae2c2551e.
Observed 2026-10-17 16:55:00 UTC, captured 2026-10-17 17:00:06.696Z; source body SHA-256 b8be3a3f9dbb0f9d47f7f7d56c511352303f71121022093aee1718b59882e480.
Observed 2026-10-17 17:15:00 UTC, captured 2026-10-17 17:30:08.063Z; source body SHA-256 11a3b064cbb915e9c81d77c70b40b145987a41db3e38756b4524ff24f53d5443.
Observed 2026-10-17 17:35:00 UTC, captured 2026-10-17 17:45:06.189Z; source body SHA-256 bb47c96590121b41a9feeb311f7c3d41c980d6bcd8429c717331c431e9054539.
Observed 2026-10-17 17:55:00 UTC, captured 2026-10-17 18:00:07.907Z; source body SHA-256 87f841dd0eda299799ecfa27669c14712906e9b7f2462af1e9aaebc60f5a4644.
Observed 2026-10-17 18:15:00 UTC, captured 2026-10-17 18:30:06.364Z; source body SHA-256 0d6d9bc3bb7f43638efd34fe901008409d28d015405c8aad14dafa1075c4d4b1.
Observed 2026-10-17 18:35:00 UTC, captured 2026-10-17 18:45:08.637Z; source body SHA-256 d8857538eb4d7da46d85d75840aca2483dedb9a12ab990ee530f470cf5baeaa4.
Observed 2026-10-17 18:55:00 UTC, captured 2026-10-17 19:00:06.492Z; source body SHA-256 9b92790a99ac0e8c2777442829b2a9236f72d6e831b8d9a0836ca29a9d3acbba.
Observed 2026-10-17 19:15:00 UTC, captured 2026-10-17 19:30:06.052Z; source body SHA-256 aa7b05d3d8cd0f26f9597345b6479a140b0f5645da83ed257a55986a53983c29.
Observed 2026-10-17 19:35:00 UTC, captured 2026-10-17 19:45:05.971Z; source body SHA-256 9a8252eafc94ab71bcce3ec09e0dd29ff50a2f9cb59878a245bd6cdcc185a2f6.
Observed 2026-10-17 19:55:00 UTC, captured 2026-10-17 20:00:08.337Z; source body SHA-256 b75985c438912b2da4a26e309fc2fbabef235be8a13c5848c5c5d64297850019.
Observed 2026-10-17 20:15:00 UTC, captured 2026-10-17 20:30:06.143Z; source body SHA-256 ef311b664ea18e802db618b518e916a1e3a6226db66bb0132936ea67c8e53edc.
Observed 2026-10-17 20:35:00 UTC, captured 2026-10-17 20:45:06.494Z; source body SHA-256 0a537b539c8d4f94e8b1348aba2bd8ded45ddcc4f2412f7bde6463c3fc2b987f.
Observed 2026-10-17 20:55:00 UTC, captured 2026-10-17 21:00:07.279Z; source body SHA-256 79c0cc8ae6d502baffa56263b2daf4c86fd1628f11d5a529402c527d0ff32fe1.
Observed 2026-10-17 21:15:00 UTC, captured 2026-10-17 21:30:06.193Z; source body SHA-256 6b760689fb92c2907448786a9f1cd24c46a53abec34ae808d02482425d2f20be.
Observed 2026-10-17 21:35:00 UTC, captured 2026-10-17 21:45:08.029Z; source body SHA-256 db20397de7bdb6dfebf6351bdecaf5c73a0c8bb695487d415e435ccd1ae7f173.
Observed 2026-10-17 21:55:00 UTC, captured 2026-10-17 22:00:07.362Z; source body SHA-256 f1fa85855e007d5d5b85e6dbf4575f6d6bfe58fd5c9a7bb6d9e9cc636ec4c3b2.
Observed 2026-10-17 22:15:00 UTC, captured 2026-10-17 22:30:06.387Z; source body SHA-256 ee800e649e35fae1655c5e482ca1b227e0961c02593fed069f69c2209017cbce.
Observed 2026-10-17 22:35:00 UTC, captured 2026-10-17 22:45:07.760Z; source body SHA-256 51938b1186526637d24b7545f93bc3e461e7b8bf18f3132a138ba4d2be8ed037.
Observed 2026-10-17 22:55:00 UTC, captured 2026-10-17 23:00:07.092Z; source body SHA-256 2ee1214ad66de98865565d92f21f7f5094d6b2e4ef4f09839341a5e6cd89b61b.
Observed 2026-10-17 23:15:00 UTC, captured 2026-10-17 23:30:06.919Z; source body SHA-256 0810dfeebf9b707b97dadc235e485226db4bcabaca108a8bb7ae809aa4923555.
Observed 2026-10-17 23:35:00 UTC, captured 2026-10-17 23:45:07.989Z; source body SHA-256 7d94b1744f678c4004984beceb9339123acb31a327423c214ece3a85d74f5b57.
Observed 2026-10-17 23:55:00 UTC, captured 2026-10-18 00:00:09.347Z; source body SHA-256 fe50c177f37463edb2970e7df309ca8243c740fe7f3ba6344704878ab6922ee2.
Observed 2026-10-18 00:15:00 UTC, captured 2026-10-18 00:30:06.852Z; source body SHA-256 8e3fb2d104d62ee584c29d18a0e33a08276c0c1b45eec979cb7f087bdef2f712.
Observed 2026-10-18 00:35:00 UTC, captured 2026-10-18 00:45:10.479Z; source body SHA-256 b34d5cb7d1e91893d539f82e3b7c1bcb0803285010e7b33858b258866d0d8a86.
Observed 2026-10-18 00:55:00 UTC, captured 2026-10-18 01:00:10.019Z; source body SHA-256 949eb463d93270208adccd66994771bf859674b804d78a93f2b1e78571af9b73.
Observed 2026-10-18 01:15:00 UTC, captured 2026-10-18 01:30:08.633Z; source body SHA-256 848e769c04c496475a4a56da164c43dc2da3091dec76864a121c5df6639d5e1a.
Observed 2026-10-18 01:35:00 UTC, captured 2026-10-18 01:45:08.112Z; source body SHA-256 13cad0e15a9b698bf0b792427bc82dd8fc2190754fc0585e8c712116a178328a.
Observed 2026-10-18 01:55:00 UTC, captured 2026-10-18 02:00:07.747Z; source body SHA-256 2a808d30ef24af292625f66ac29ed87d3497f0029e7978811a5214db4d4e391c.
Observed 2026-10-18 02:15:00 UTC, captured 2026-10-18 02:30:10.380Z; source body SHA-256 15a6245beadfd0a8ce6f77aaf2ff42b204b4a2e411aaa89ef6925de72a6b13f9.
Observed 2026-10-18 02:35:00 UTC, captured 2026-10-18 02:45:10.655Z; source body SHA-256 f7c5501ef4bfeeb31f4ebf98fffb35a41d8f1ea4c93568cacb717917c0a2b2c2.
Observed 2026-10-18 02:55:00 UTC, captured 2026-10-18 03:00:08.091Z; source body SHA-256 1ff4ba07d334ddc5e777bc047fb0a9a13be27865eed8a1596ab4f40757641175.
Observed 2026-10-18 03:15:00 UTC, captured 2026-10-18 03:30:08.591Z; source body SHA-256 5672bdaa00d8e7c67de8856281c396b4883e06cda834c224faa3a626ff6d1bf9.
Observed 2026-10-18 03:35:00 UTC, captured 2026-10-18 03:45:09.489Z; source body SHA-256 ff30b281581e6086665a9b0170982c399149dc2307f678d1c04532064fc0aa5d.
Observed 2026-10-18 03:55:00 UTC, captured 2026-10-18 04:00:09.699Z; source body SHA-256 8e92b49a3b0987ff40c99aaaa9dbae3470c3cdf7475dec143172378b951fb9c9.
Observed 2026-10-18 04:15:00 UTC, captured 2026-10-18 04:30:08.115Z; source body SHA-256 b945d1dd8082b8fdac9fb06097591ce9e84170b10dcdd2e4fdd962f2b9d6fbb7.
Observed 2026-10-18 04:35:00 UTC, captured 2026-10-18 04:45:08.397Z; source body SHA-256 1981ebf0c9644e8e79c2b29009ee99216868277aa873dc9b808b83c662479d81.
Observed 2026-10-18 04:55:00 UTC, captured 2026-10-18 05:00:07.387Z; source body SHA-256 d0747946a85e0b6149bd4061e0c1af798f590d9eac7088d421db1613ed7afb6e.
Observed 2026-10-18 05:15:00 UTC, captured 2026-10-18 05:30:07.030Z; source body SHA-256 846c18882078fc94390c507105ede603df0a14abac3dfdc9e7f73c6b87a50126.
Observed 2026-10-18 05:35:00 UTC, captured 2026-10-18 05:45:07.433Z; source body SHA-256 0768cb322d2c5bf6958ddb7ce2a53d243bd969b5fea1047d24b71a6a5b41a886.
Observed 2026-10-18 05:55:00 UTC, captured 2026-10-18 06:00:07.780Z; source body SHA-256 516488ab99336824be748099d9095cce133bd39e49a9ebce7ac31e8ca5594345.
Observed 2026-10-18 06:15:00 UTC, captured 2026-10-18 06:30:07.583Z; source body SHA-256 9ab6462e67c4eb5bc9bba4861248e2cbbd9c65288df1942a8f6764fe2c578731.
Observed 2026-10-18 06:35:00 UTC, captured 2026-10-18 06:45:08.757Z; source body SHA-256 d4711d6703b86d9ea514fec4b95bcb3555271ef53e955aeb3ccf01ed7e9bb620.
Observed 2026-10-18 06:55:00 UTC, captured 2026-10-18 07:00:07.060Z; source body SHA-256 cef387356b01a216d569fa5c4ef4911e52a5f5bb19d30034c5f3867ad0b3f6c5.
Observed 2026-10-18 07:15:00 UTC, captured 2026-10-18 07:30:06.796Z; source body SHA-256 74b102d64c1c868841354fbe7a693afba78dbac9ebb7f03d8570e756b2c2130f.
Observed 2026-10-18 07:35:00 UTC, captured 2026-10-18 07:45:08.639Z; source body SHA-256 9a7c7093b2467d1caafe5fbf37862b14188b33d6d26d7dd98ffea259aca6468d.
Observed 2026-10-18 07:55:00 UTC, captured 2026-10-18 08:00:11.468Z; source body SHA-256 53a01ad60670349facf980ea22602bd1fb21ffca3c40d501342bfb23f8e22c0b.
Observed 2026-10-18 08:15:00 UTC, captured 2026-10-18 08:30:07.963Z; source body SHA-256 abda48cfec1b2ae69e44a795568c94dd13b85c9cda6ffbd700d6cc1ad8e661af.
Observed 2026-10-18 08:35:00 UTC, captured 2026-10-18 08:45:08.723Z; source body SHA-256 b94480e0282948857cb50e32abb0929b9c8b46e37658fe5c106712311ab0bc33.
Observed 2026-10-18 08:55:00 UTC, captured 2026-10-18 09:00:09.520Z; source body SHA-256 8ad9748657ec506ad6f6e8aeac27fa8611b3416e28598e978a06c642e3ba8df5.
Observed 2026-10-18 09:15:00 UTC, captured 2026-10-18 09:30:07.695Z; source body SHA-256 a58900ae1657c840a58570bc15d806cba8e5821b7206d1f20bbfe60247d2272e.
Observed 2026-10-18 09:35:00 UTC, captured 2026-10-18 09:45:08.038Z; source body SHA-256 b50442be3830d60c1e5a263821d1604a46897ac5c06cc2f0323cc6c45b1d2753.
Observed 2026-10-18 09:55:00 UTC, captured 2026-10-18 10:00:08.135Z; source body SHA-256 7088f7a20b608392c60688c0c6cc24bb874f518a9d855a8f279a1656aa963b5f.
Observed 2026-10-18 10:15:00 UTC, captured 2026-10-18 10:30:06.119Z; source body SHA-256 c09507d8a0d7bc86e2bab5fe708228dc04f4393b02bfa72428750283948a691a.
Observed 2026-10-18 10:35:00 UTC, captured 2026-10-18 10:45:07.183Z; source body SHA-256 d1ce5acb1648d1238f41210e99ee39596d1e732c016108b03ef139fa9211cf42.
Observed 2026-10-18 10:55:00 UTC, captured 2026-10-18 11:00:09.217Z; source body SHA-256 4c9aeddeccab4a18ef736d7fde43bbf68e646f4e3dd3672a819a2d3d41e31ffb.
Observed 2026-10-18 11:15:00 UTC, captured 2026-10-18 11:30:06.515Z; source body SHA-256 552074735cbcbafca362f26045ca6aeccc9a96463d42216ab99304694b1d60ed.
Observed 2026-10-18 11:35:00 UTC, captured 2026-10-18 11:45:07.985Z; source body SHA-256 67463000a7ff204e4f09e3b692ebe0af1163f9e0efbac2b0e8edb5f990f8e3ae.
Observed 2026-10-18 11:55:00 UTC, captured 2026-10-18 12:00:08.069Z; source body SHA-256 99d8a01a4181fd6dc5a6f38379f01ddc13eb1176afbc54835f8b9e2d8864e444.
Observed 2026-10-18 12:15:00 UTC, captured 2026-10-18 12:30:06.668Z; source body SHA-256 157f3c472fc25c208b77689f1eed72bddcd8a964153fd5b23331c60e4784f99e.

Values use the decoded station report. Null means not reported, never zero. Gust is kept separate from sustained wind.

Observation source page · Cached readings as JSON · Official source

Recent source changes

wssi-day2 · source-revision · 10:14ZRecorded 2026-10-18T12:38:05.100Z
wssi-day3 · source-revision · 10:14ZRecorded 2026-10-18T12:38:05.100Z
wssi-day1 · source-revision · 10:14ZRecorded 2026-10-18T12:38:05.100Z
radar-alerts · source-revision · 12:37ZRecorded 2026-10-18T12:37:04.409Z
radar-alerts · source-revision · 12:36ZRecorded 2026-10-18T12:36:03.202Z
day1-tornado · source-revision · 12:30ZRecorded 2026-10-18T12:35:06.216Z
day1-wind · source-revision · 12:30ZRecorded 2026-10-18T12:35:06.216Z
day1-categorical · source-revision · 12:30ZRecorded 2026-10-18T12:35:06.216Z

Recording coverage and limits

warnings: retained from 2026-10-17T12:38:40.436Z through 2026-10-18T12:38:04.535Z
outlooks: retained from 2026-10-17T12:38:40.436Z through 2026-10-18T12:35:06.216Z
hydro: retained from 2026-10-17T12:38:40.436Z through 2026-10-18T12:35:05.943Z
analysis: retained from 2026-10-17T12:38:40.436Z through 2026-10-18T12:30:06.668Z
winter: retained from 2026-10-17T12:38:40.436Z through 2026-10-18T12:38:05.100Z

Source-message history is not recorded imagery replay. Recorded radar/satellite imagery is not available in this view.

Checks every minute; each layer keeps its own time.

Coastal observations

Scheduled public-station observations

Water levels are relative to the named datum, not flood depth above ground. Observations keep their own report times.

Coverage and interpretation

Observed water level is relative to the named vertical datum, not flood depth above ground. Observed minus predicted tide is a matched-time residual, not a universal storm-surge or inundation forecast. Buoy wind is not a cyclone maximum; significant wave height is not coastal flood depth. Missing readings are not zero.

Only operator-configured public stations are collected. Coastal context includes stations inside the named monitoring area or within 100 nautical miles of a vertex of its published outline, so offshore buoys can be included; this is a proximity rule, not an impact footprint. Cyclone-only context is within 600 nautical miles of the selected advisory center. Shown center distances are not impact radii. Station-file history without a reported position is not assigned a historical location.

NOAA CO-OPS water levels and predicted tide

Source current · checked 2026-10-18 12:38:03.937Z. 0 configured stations in this view.

No configured station has been collected in this scope. This does not establish safe coastal conditions.

NOAA NDBC wind, pressure and waves

Source current · checked 2026-10-18 12:36:02.571Z. 0 configured stations in this view.

No configured station has been collected in this scope. This does not establish safe coastal conditions.

Complete cached coastal station directory · Source health

Spotlight: Winter Storm Severity Index

1 of 15

Winter Storm Severity Index

WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”

Winter Weather Area
Minor Impacts
Moderate Impacts
Major Impacts
Extreme Impacts

Highest in this area, by day and by cause

Day 1: nothing drawn
Day 2: nothing drawn
Day 3: nothing drawn
Snow amount, Days 1–3: nothing drawn
Snow load, Days 1–3: nothing drawn
Ice, Days 1–3: nothing drawn
Blowing snow, Days 1–3: nothing drawn

Each day and cause on the Winter tab, with its own issue time

WPC’s WSSI, overall impact, Days 1–3, valid 10:00Z to 21 Oct 06:00Z, issued 10:14Z. WPC issues each day and cause on its own clock. Not a warning, and not a chance. Data: NOAA/NWS/WPC.

Chance of Moderate impacts or worse, Day 1

WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”

5–10% (not drawn)
10–20% (not drawn)
20–30% (not drawn)
30–40% (not drawn)
40–50% (not drawn)
50–60% (not drawn)
60–70% (not drawn)
70–80% (not drawn)
80–90% (not drawn)
90–95% (not drawn)
95% or more (not drawn)

Each level and day on the Winter tab

WPC’s WSSI-P: no chance drawn for Day 1. Data: NOAA/NWS/WPC.

Chance of at least 4 inches of snow, Day 1

WPC gives no chance of 4 inches of snow or more in this area over the next three days, so Day 1’s 4 inches is shown.

Slight: at least 10%
Moderate: at least 40%
High: at least 70%

Every day and amount on the Winter tab

WPC’s Probabilistic Winter Precipitation Forecast, 12:00Z to 19 Oct 12:00Z, issued 07:36Z. Outlines, as WPC draws them. Data: NOAA/NWS/WPC.

Winter watches, warnings and advisories

Frost Advisory 6 until 14:00Z · NWS Chicago IL, NWS Indianapolis IN, NWS Lincoln IL, 2 more offices

NWS’s winter and cold alerts in force in the area, by event as issued, each counted once, with the offices that issued them and the latest end. Data: NOAA/NWS.

Snow on the ground

NOHRSC snow depth and snow water equivalent use the source’s original pictures and legends, with qualified footprint times. Open the cached source page for availability and retained history. This wall has no snow picture to rotate; missing imagery does not mean no snow.

NOHRSC snow analysis and retained pictures

Data: NOAA/NWS/NOHRSC. Snow analysis, not a measurement at a place.

WPC’s heavy snow and icing discussion

The whole discussion

Issued 08:46Z, for 12:00Z to 21 Oct 12:00Z. WPC’s words, as written. Data: NOAA/NWS/WPC.

SPC Day 1 outlook

General Thunderstorms Risk

SPC’s Day 1 categorical outlook, valid 13:00Z to 19 Oct 12:00Z, issued 12:30Z. SPC’s categories, as drawn. Data: NOAA/SPC.

Watches

No tornado or severe thunderstorm watch in force in this area.

SPC’s watches, by number, matched by the counties they list. Data: NOAA/SPC.

Mesoscale discussions

No mesoscale discussion reaches this area.

SPC’s mesoscale discussions whose outline reaches the area. Data: NOAA/SPC.

Storm ingredients

SPC’s hourly mesoanalysis, observed soundings and model guidance for the area, on the Analysis tab with its own clocks.

Open the Analysis tab

Drawn by the Analysis tab’s own renderer. Data: NOAA/SPC, NOAA/NCEP.

Flash-flood risk, Day 1

Marginal

WPC’s excessive rainfall outlook, 12:00Z to 19 Oct 12:00Z, issued 07:56Z: a chance of flash flooding, in four categories. Data: NOAA/WPC.

River gauges in flood

No river, coastal or lake gauge in this area is in flood, observed or forecast.

NWS’s gauges at flood stage or above in the area, worst first, each with its forecast hydrograph on Rain & rivers. Data: NOAA/NWPS.

Rain expected and rain that fell

WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.

Open Rain & rivers

Data: NOAA/WPC, NOAA/NSSL MRMS.

The tropics

NHC’s and JTWC’s storms, their official graphics and the watches and warnings for them. Storm Mode’s own tropical panels arrive with its tropical events.

Open the Tropics page

Data: NOAA/NHC, JTWC.

Radar, winter preset

The Radar page’s winter preset over the area: HRDPS forecast snow with NWS’s warnings on top, loaded by your browser. A forecast, labelled as one there.

Open the radar

Live tiles; the radar keeps no last-good copy.

What changed, last 60 minutes

12:30ZSPC Day 1 outlook issued

The products’ own words and times, and what is no longer in force since the last read. Never written by AI.

Monitoring area, legacy alert summary and selection rules

Area: Illinois (NWS states: IL)
Hazards: Every kind of warning, watch and advisory this site carries
Window: In force now, with the next days of SPC’s and WPC’s products
Made by: This address: anyone can make one, and nothing is stored. Change the area or hazards

An area you chose, not a storm’s footprint: everything here is in force in this area, never “from this storm”.

In force in this area 6

Frost Advisory6until 14:00Z

Every alert in this area, most urgent first

Frost AdvisoryJefferson; Wayne; Edwards; Wabash; Perry; Franklin; Hamilton; White; Jackson; Williamson; Saline; Gallatin; Union; Johnson; Pope; Hardin; Alexander; Pulaski; Massac; Gibson; Pike; Posey; Vanderburgh; Warrick; Spencer; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Crittenden; Lyon; Trigg; Caldwell; Union; Webster; Hopkins; Christian; Henderson; Daviess; McLean; Muhlenberg; Todd; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madriduntil 13:00Z · NWS Paducah KY
Frost AdvisoryGreene; Macoupin; Calhoun; Jersey; Pike; Audrain; Osage; Callaway; Montgomery; Lincoln; Gasconade; Warren; St. Charles; St. Louisuntil 14:00Z · NWS St Louis MO
Frost AdvisoryMontgomery; Bond; Fayette; Clinton; Marion; Washington; Randolph; Madison; St. Clair; Monroe; Franklin; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynoldsuntil 14:00Z · NWS St Louis MO
Frost AdvisoryKankakee; Livingston; Iroquois; Ford; Eastern Will; Lake; Porter; Newton; Jasper; Bentonuntil 13:00Z · NWS Chicago IL
Frost AdvisoryCarroll; Warren; Tippecanoe; Fountain; Vermillion; Parke; Putnam; Marion; Vigo; Clay; Owen; Morgan; Johnson; Sullivan; Greene; Monroe; Brown; Bartholomew; Knox; Daviess; Martin; Lawrence; Jackson; Jenningsuntil 13:00Z · NWS Indianapolis IN · drawn over this area
Frost AdvisoryMcLean; Logan; De Witt; Piatt; Champaign; Vermilion; Sangamon; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; Lawrenceuntil 14:00Z · NWS Lincoln IL

Most urgent first, by the Briefing’s ranking. Checked 12:38Z.

Sources

NWS warnings and SPC watches checked 12:38Z
NWS watches and advisories checked 12:38Z
SPC mesoscale discussions checked 12:38Z
SPC Day 1 outlook checked 12:35Z
WPC excessive rainfall checked 12:35Z
NWPS river gauges checked 12:35Z
WPC WSSI checked 12:38Z
WPC WSSI-P checked 12:38Z
WPC snow and ice chances checked 12:38Z
WPC heavy snow and icing discussion checked 12:38Z
Radar live tiles, no last-good copy

Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.