Storm Mode: Illinois

0 warnings total · 0 tornado warnings · 7 alerts including watches and advisories

Current alert feed · checked 05:04Z

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)

Warnings in area

7 of 7 alerts

Watched places

Places saved on this device appear here with scripting enabled.

Find or save a place

Map

Frost Advisory 7

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked 05:04Z. 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 2026-10-17 18:00:00 UTC, picture retrieved 2026-10-18 03:23:05.460 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

Radar-derived cells (0) · current

Collector checked 05:03Z; feed generated 05:03Z. Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

Station and river observations (42)

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 · 04:35Z
K1H2 · K1H2 · current · 04:55Z
K3LF · K3LF · current · 04:55Z
KAJG · KAJG · current · 04:55Z
KALN · KALN · current · 04:35Z
KARR · KARR · current · 04:52Z
KBMI · KBMI · current · 04:56Z
KC75 · KC75 · current · 04:35Z
KCIR · KCIR · current · 04:35Z
KDEC · KDEC · current · 04:54Z
KDKB · KDKB · current · 04:55Z
KDPA · KDPA · current · 04:52Z
KENL · KENL · current · 04:55Z
KFEP · KFEP · current · 04:55Z
KFOA · KFOA · current · 04:35Z
KFWC · KFWC · current · 04:55Z
KGBG · KGBG · current · 04:35Z
KHSB · KHSB · current · 04:55Z
KI63 · KI63 · current · 04:35Z
KIJX · KIJX · current · 04:35Z
KIKK · KIKK · current · 04:35Z
KJOT · KJOT · current · 04:55Z
KLOT · KLOT · current · 04:35Z
KM30 · KM30 · current · 04:35Z
KMDH · KMDH · current · 04:52Z
KMDW · KMDW · current · 04:53Z
KMLI · KMLI · current · 04:52Z
KMQB · KMQB · current · 04:55Z
KMWA · KMWA · current · 04:35Z
KOLY · KOLY · current · 04:30Z
KPIA · KPIA · current · 04:54Z
KPNT · KPNT · current · 04:35Z
KPPQ · KPPQ · current · 04:35Z
KPRG · KPRG · current · 04:35Z
KRPJ · KRPJ · current · 04:35Z
KRSV · KRSV · current · 04:35Z
KSAR · KSAR · current · 04:35Z
KSFY · KSFY · current · 04:55Z
KSLO · KSLO · current · 04:55Z
KSPI · KSPI · current · 04:52Z
KTIP · KTIP · current · 04:35Z
KUGN · KUGN · current · 04:51Z

Showing 42 of 42 listed sources. All surface stations and retained trends · All supported gauges and forecasts

Selected details

Surface station KSLO

current · Observed 2026-10-18 04:55:00 UTC · wind Not reported · temperature 4.7 °C.

Station KSLO · -88.9612, 38.6446 (longitude, latitude).

Source checked 2026-10-18 05:00:05.848Z · 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: 70; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-17 05:55:00 UTC.

Observed sustained wind: no readable observations.

Temperature, dew point and pressure trends

Observed temperature · 70 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Observed dew point · 70 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 (70)

Observed (UTC)	Wind / gust (kt)	From (° true)	Temperature / dew point (°C)	Pressure (mb)	Visibility (mi)
2026-10-17 05:55:00 UTC	Not reported / Not reported	Not reported	9.6 / 7	Not reported	10 or more
2026-10-17 06:15:00 UTC	Not reported / Not reported	Not reported	9.8 / 7.3	Not reported	10 or more
2026-10-17 06:35:00 UTC	Not reported / Not reported	Not reported	9.8 / 7	Not reported	10 or more
2026-10-17 06:55:00 UTC	Not reported / Not reported	Not reported	9.8 / 6.6	Not reported	10 or more
2026-10-17 07:15:00 UTC	Not reported / Not reported	Not reported	9.3 / 6.1	Not reported	10 or more
2026-10-17 07:35:00 UTC	Not reported / Not reported	Not reported	9 / 6.3	Not reported	10 or more
2026-10-17 07:55:00 UTC	Not reported / Not reported	Not reported	8.5 / 5.9	Not reported	10 or more
2026-10-17 08:15:00 UTC	Not reported / Not reported	Not reported	8 / 5.7	Not reported	10 or more
2026-10-17 08:35:00 UTC	Not reported / Not reported	Not reported	8.1 / 6	Not reported	10 or more
2026-10-17 08:55:00 UTC	Not reported / Not reported	Not reported	8 / 5.7	Not reported	10 or more
2026-10-17 09:15:00 UTC	Not reported / Not reported	Not reported	7.2 / 5.3	Not reported	10 or more
2026-10-17 09:35:00 UTC	Not reported / Not reported	Not reported	7.5 / 5.5	Not reported	10 or more
2026-10-17 09:55:00 UTC	Not reported / Not reported	Not reported	7 / 5.1	Not reported	10 or more
2026-10-17 10:15:00 UTC	Not reported / Not reported	Not reported	6.7 / 4.8	Not reported	10 or more
2026-10-17 10:35:00 UTC	Not reported / Not reported	Not reported	6.3 / 4.5	Not reported	10 or more
2026-10-17 10:55:00 UTC	Not reported / Not reported	Not reported	5.9 / 4.3	Not reported	10 or more
2026-10-17 11:15:00 UTC	Not reported / Not reported	Not reported	5.8 / 4.3	Not reported	10 or more
2026-10-17 11:35:00 UTC	Not reported / Not reported	Not reported	5.8 / 4.2	Not reported	10 or more
2026-10-17 11:55:00 UTC	Not reported / Not reported	Not reported	5.5 / 4	Not reported	10 or more
2026-10-17 12:15:00 UTC	Not reported / Not reported	Not reported	5.5 / 4.1	Not reported	10 or more
2026-10-17 12:35:00 UTC	Not reported / Not reported	Not reported	5.1 / 3.9	Not reported	10 or more
2026-10-17 12:55:00 UTC	Not reported / Not reported	Not reported	6.1 / 4.8	Not reported	10 or more
2026-10-17 13:15:00 UTC	Not reported / Not reported	Not reported	6.9 / 5	Not reported	10 or more
2026-10-17 13:35:00 UTC	Not reported / Not reported	Not reported	7.5 / 4.6	Not reported	10 or more
2026-10-17 13:55:00 UTC	Not reported / Not reported	Not reported	8.3 / 4.6	Not reported	10 or more
2026-10-17 14:15:00 UTC	Not reported / Not reported	Not reported	8.9 / 5	Not reported	10 or more
2026-10-17 14:35:00 UTC	Not reported / Not reported	Not reported	9.4 / 5.2	Not reported	10 or more
2026-10-17 14:55:00 UTC	Not reported / Not reported	Not reported	9.7 / 5.5	Not reported	10 or more
2026-10-17 15:15:00 UTC	Not reported / Not reported	Not reported	10.5 / 5.4	Not reported	10 or more
2026-10-17 15:35:00 UTC	Not reported / Not reported	Not reported	10.6 / 4.2	Not reported	10 or more
2026-10-17 15:55:00 UTC	Not reported / Not reported	Not reported	11.1 / 4.2	Not reported	10 or more
2026-10-17 16:15:00 UTC	Not reported / Not reported	Not reported	11.5 / 3.9	Not reported	10 or more
2026-10-17 16:35:00 UTC	Not reported / Not reported	Not reported	12.2 / 3.8	Not reported	10 or more
2026-10-17 16:55:00 UTC	Not reported / Not reported	Not reported	12.3 / 3.4	Not reported	10 or more
2026-10-17 17:15:00 UTC	Not reported / Not reported	Not reported	12.6 / 2.9	Not reported	10 or more
2026-10-17 17:35:00 UTC	Not reported / Not reported	Not reported	13.3 / 3.2	Not reported	10 or more
2026-10-17 17:55:00 UTC	Not reported / Not reported	Not reported	13.5 / 3.6	Not reported	10 or more
2026-10-17 18:15:00 UTC	Not reported / Not reported	Not reported	13.6 / 3.1	Not reported	10 or more
2026-10-17 18:35:00 UTC	Not reported / Not reported	Not reported	13.9 / 2.6	Not reported	10 or more
2026-10-17 18:55:00 UTC	Not reported / Not reported	Not reported	14.1 / 2.1	Not reported	10 or more
2026-10-17 19:15:00 UTC	Not reported / Not reported	Not reported	14.6 / 1.7	Not reported	10 or more
2026-10-17 19:35:00 UTC	Not reported / Not reported	Not reported	14.4 / 0.9	Not reported	10 or more
2026-10-17 19:55:00 UTC	Not reported / Not reported	Not reported	14.7 / 2.2	Not reported	10 or more
2026-10-17 20:15:00 UTC	Not reported / Not reported	Not reported	14.6 / 0.5	Not reported	10 or more
2026-10-17 20:35:00 UTC	Not reported / Not reported	Not reported	14.9 / 0.8	Not reported	10 or more
2026-10-17 20:55:00 UTC	Not reported / Not reported	Not reported	15.2 / 1.4	Not reported	10 or more
2026-10-17 21:15:00 UTC	Not reported / Not reported	Not reported	14.9 / 0.6	Not reported	10 or more
2026-10-17 21:35:00 UTC	Not reported / Not reported	Not reported	14.9 / 0.4	Not reported	10 or more
2026-10-17 21:55:00 UTC	Not reported / Not reported	Not reported	14.9 / 0.8	Not reported	10 or more
2026-10-17 22:15:00 UTC	Not reported / Not reported	Not reported	14.7 / 0.6	Not reported	10 or more
2026-10-17 22:35:00 UTC	Not reported / Not reported	Not reported	14.5 / 1.1	Not reported	10 or more
2026-10-17 22:55:00 UTC	Not reported / Not reported	Not reported	14 / 1.9	Not reported	10 or more
2026-10-17 23:15:00 UTC	Not reported / Not reported	Not reported	13.1 / 1.4	Not reported	10 or more
2026-10-17 23:35:00 UTC	Not reported / Not reported	Not reported	11.3 / 2.1	Not reported	10 or more
2026-10-17 23:55:00 UTC	Not reported / Not reported	Not reported	9.6 / 5	Not reported	10 or more
2026-10-18 00:15:00 UTC	Not reported / Not reported	Not reported	9.3 / 4.5	Not reported	10 or more
2026-10-18 00:35:00 UTC	Not reported / Not reported	Not reported	8.7 / 4.4	Not reported	10 or more
2026-10-18 00:55:00 UTC	Not reported / Not reported	Not reported	8.3 / 3.9	Not reported	10 or more
2026-10-18 01:15:00 UTC	Not reported / Not reported	Not reported	7.6 / 4.5	Not reported	10 or more
2026-10-18 01:35:00 UTC	Not reported / Not reported	Not reported	7.5 / 3.7	Not reported	10 or more
2026-10-18 01:55:00 UTC	Not reported / Not reported	Not reported	6.5 / 4.3	Not reported	10 or more
2026-10-18 02:15:00 UTC	Not reported / Not reported	Not reported	6.6 / 4.5	Not reported	10 or more
2026-10-18 02:35:00 UTC	Not reported / Not reported	Not reported	6.1 / 4.2	Not reported	10 or more
2026-10-18 02:55:00 UTC	Not reported / Not reported	Not reported	6 / 4.2	Not reported	10 or more
2026-10-18 03:15:00 UTC	Not reported / Not reported	Not reported	5.7 / 4.1	Not reported	10 or more
2026-10-18 03:35:00 UTC	Not reported / Not reported	Not reported	5.7 / 4.2	Not reported	10 or more
2026-10-18 03:55:00 UTC	Not reported / Not reported	Not reported	5.5 / 4.3	Not reported	10 or more
2026-10-18 04:15:00 UTC	Not reported / Not reported	Not reported	5 / 4.1	Not reported	10 or more
2026-10-18 04:35:00 UTC	Not reported / Not reported	Not reported	5.1 / 4.1	Not reported	10 or more
2026-10-18 04:55:00 UTC	Not reported / Not reported	Not reported	4.7 / 3.9	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 05:55:00 UTC, captured 2026-10-17 06:15:07.108Z; source body SHA-256 bc11437b0ef17dcf4b91f1dd747598a8f12e615b799dd81a79f1255842a6924c.
Observed 2026-10-17 06:15:00 UTC, captured 2026-10-17 06:30:05.861Z; source body SHA-256 d2367d9768b90c597493305ffa360f940ef03b7106f33dd081f52a3184a99a76.
Observed 2026-10-17 06:35:00 UTC, captured 2026-10-17 06:45:06.740Z; source body SHA-256 9c6f5a3106002efdcc7a8b2d0e8218089792e9eef38cd8299c5bd836e5d42087.
Observed 2026-10-17 06:55:00 UTC, captured 2026-10-17 07:00:07.405Z; source body SHA-256 144290c75a8e56c75efc02af4781ad6023effc93af11beecc88e5a894fd759e2.
Observed 2026-10-17 07:15:00 UTC, captured 2026-10-17 07:30:07.049Z; source body SHA-256 72518a7cc84febeb6a5215ea486f40da6a7f9fd82c469215c981994a032b8dde.
Observed 2026-10-17 07:35:00 UTC, captured 2026-10-17 07:45:06.824Z; source body SHA-256 969c77d7b2b2764c9f773a87041c6cbbbbaf8823bfa35f91b4140429ac51bb7a.
Observed 2026-10-17 07:55:00 UTC, captured 2026-10-17 08:00:09.060Z; source body SHA-256 7be3a24f888fea0090cfe562315fa855fd38009dce22d030b3202578d40de7a3.
Observed 2026-10-17 08:15:00 UTC, captured 2026-10-17 08:30:06.317Z; source body SHA-256 ee57d94d765305bdee2e9324b9ec29aed1dcaefe34d7679035bd31c26621fb73.
Observed 2026-10-17 08:35:00 UTC, captured 2026-10-17 08:45:06.623Z; source body SHA-256 a3e5257dcf1bc3618e16cbe3b34c3744fe8e49bdd3fafa0fbdc0e4b1a5568c20.
Observed 2026-10-17 08:55:00 UTC, captured 2026-10-17 09:15:07.673Z; source body SHA-256 016271d991e052b4ca0bb6a0412411402fcafc0acde04052dffa85b284d7e986.
Observed 2026-10-17 09:15:00 UTC, captured 2026-10-17 09:30:07.003Z; source body SHA-256 ce16615c7ffb7c9225122ce0061b3c973daddab7d943d3cec70767f99ed3598c.
Observed 2026-10-17 09:35:00 UTC, captured 2026-10-17 09:45:06.572Z; source body SHA-256 264ee016d2ae83ee5e7131cea90c67d6f9bde3f9890fbab2f70dc771a0f7992e.
Observed 2026-10-17 09:55:00 UTC, captured 2026-10-17 10:00:07.986Z; source body SHA-256 9340f13b53b6f68bd8a30ed2d06d6d234571fd5b0e713e9ce9e31feeb68061fa.
Observed 2026-10-17 10:15:00 UTC, captured 2026-10-17 10:30:06.352Z; source body SHA-256 87ae8c0134ee4bb56b82c46d1fd6b1969bd7b7a47f3d1c0e425824aacaac3811.
Observed 2026-10-17 10:35:00 UTC, captured 2026-10-17 10:45:06.782Z; source body SHA-256 9ace5290d29da96dc29ba5a5c7f02d2d81d32c81c0102054dbad890e49bbf8a8.
Observed 2026-10-17 10:55:00 UTC, captured 2026-10-17 11:15:07.064Z; source body SHA-256 7b8de7613178a73bdf0132bc79f470b3cc468514bec5c0458f7c710d68cffae8.
Observed 2026-10-17 11:15:00 UTC, captured 2026-10-17 11:30:05.719Z; source body SHA-256 c9c795d31eeffa7e41e76acece367fd4abc33772ba088c0bf8588ed8d9b403e5.
Observed 2026-10-17 11:35:00 UTC, captured 2026-10-17 11:45:06.616Z; source body SHA-256 f7c801856f99557ed285ea2d3242c989100b943f230dadff0df38c8a48f1969e.
Observed 2026-10-17 11:55:00 UTC, captured 2026-10-17 12:00:07.101Z; source body SHA-256 0d48ce09e98a50d784e5ad8e140491c989145805c5bb2e2374c623945ce9d22d.
Observed 2026-10-17 12:15:00 UTC, captured 2026-10-17 12:30:06.477Z; source body SHA-256 e6b8647726852d6b09642c10d9839bf06b8b55bb7b2a6223efb9c23595245791.
Observed 2026-10-17 12:35:00 UTC, captured 2026-10-17 12:45:09.417Z; source body SHA-256 4313e89bf893409ef88241d3e7d3541b552354a697b3530bc439efd61acf54ce.
Observed 2026-10-17 12:55:00 UTC, captured 2026-10-17 13:15:08.402Z; source body SHA-256 235074cffed89b4cab92d4ab7ccfd328bf69ddc8588653f76dece65dfad02f56.
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 14:15:08.468Z; source body SHA-256 89c5e2da6c1df15fc284a3f38b9662d6ab7633272342363f5f2103f7f1dca9bc.
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 15:15:08.165Z; source body SHA-256 03e82f238e3281188a3e527cc38fc1ce4ad8af25fe75f76604b458e9da0f511c.
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 19:15:08.055Z; source body SHA-256 9b1ec8d3a0f8f89c0d1ebd7a0bd7e7ce037e6cc9a183d6538ed27218bec705c5.
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 23:15:09.343Z; source body SHA-256 c50273d54023d9eed3fa370998416e92a710a0360dfdf59dd328dfb33e4357f3.
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.

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

radar-alerts · source-revision · 05:02ZRecorded 2026-10-18T05:02:03.641Z
radar-alerts · source-revision · 05:01ZRecorded 2026-10-18T05:01:03.190Z
office-hwo · source-revision · 05:00ZRecorded 2026-10-18T05:00:13.818Z
office-afd · source-revision · 05:00ZRecorded 2026-10-18T05:00:13.818Z
radar-alerts · source-revision · 05:00ZRecorded 2026-10-18T05:00:08.925Z
metars · source-revision · 05:00ZRecorded 2026-10-18T05:00:07.387Z
hrrr · source-revision · 04:00ZRecorded 2026-10-18T05:00:07.387Z
radar-alerts · source-revision · 04:59ZRecorded 2026-10-18T04:59:04.679Z

Recording coverage and limits

warnings: retained from 2026-10-17T05:04:23.485Z through 2026-10-18T05:04:04.345Z
outlooks: retained from 2026-10-17T05:04:23.485Z through 2026-10-18T05:00:13.818Z
hydro: retained from 2026-10-17T05:04:23.485Z through 2026-10-18T04:55:05.918Z
analysis: retained from 2026-10-17T05:04:23.485Z through 2026-10-18T05:00:07.387Z
winter: retained from 2026-10-17T05:04:23.485Z through 2026-10-18T04:53:05.076Z

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

Auto-updating checks this site’s cache every minute; each source keeps its own clock.

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 05:02:03.088Z. 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 04:56:04.268Z. 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 00:00Z to 21 Oct 00:00Z, issued 02:15Z. 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, 00:00Z to 19 Oct 00:00Z, issued 17 Oct 19:10Z. Outlines, as WPC draws them. Data: NOAA/NWS/WPC.

Winter watches, warnings and advisories

Frost Advisory 7 7 not yet in effect · 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 17 Oct 18:39Z, for 00:00Z to 21 Oct 00:00Z. WPC’s words, as written. Data: NOAA/NWS/WPC.

SPC Day 1 outlook

General Thunderstorms Risk

SPC’s Day 1 categorical outlook, valid 01:00Z to 12:00Z, issued 00:54Z. 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
Slight

WPC’s excessive rainfall outlook, 01:00Z to 12:00Z, issued 00:35Z: 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

since 04:21Z, when this server began watching this area

Nothing has changed since 04:21Z.

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 7

Frost Advisory71 new · 7 not yet in effect · until 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 MadridFrom 06:00Z · until 13:00Z · NWS Paducah KY
Frost AdvisoryMcLean; De Witt; Piatt; Champaign; Vermilion; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; LawrenceFrom 06:00Z · until 14:00Z · NWS Lincoln IL
Frost AdvisoryLogan; SangamonFrom 06:00Z · until 14:00Z · NWS Lincoln 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; JenningsFrom 06:00Z · until 13:00Z · NWS Indianapolis IN · drawn over this area
Frost AdvisoryGreene; Macoupin; Calhoun; Jersey; Pike; Audrain; Osage; Callaway; Montgomery; Lincoln; Gasconade; Warren; St. Charles; St. LouisFrom 06:00Z · until 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; ReynoldsFrom 06:00Z · until 14:00Z · NWS St Louis MO
Frost AdvisoryKankakee; Livingston; Iroquois; Ford; Eastern Will; Lake; Porter; Newton; Jasper; BentonFrom 08:00Z · until 13:00Z · NWS Chicago IL

Most urgent first, by the Briefing’s ranking. Checked 05:04Z.

Sources

NWS warnings and SPC watches checked 05:04Z
NWS watches and advisories checked 05:04Z
SPC mesoscale discussions checked 05:04Z
SPC Day 1 outlook checked 05:00Z
WPC excessive rainfall checked 05:00Z
NWPS river gauges checked 04:55Z
WPC WSSI checked 04:53Z
WPC WSSI-P checked 04:53Z
WPC snow and ice chances checked 04:53Z
WPC heavy snow and icing discussion checked 04:53Z
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.