SPC Day 1 outlook
- General Thunderstorms Risk
SPC’s Day 1 categorical outlook, valid to , issued . SPC’s categories, as drawn. Data: NOAA/SPC.
CURRENT CONTEXT · 0 warnings total · 0 tornado warnings · 0 alerts including watches and advisories
Current alert feed · checked
Warnings in area
0 of 0 alertsNo active alerts reported by the current feed in this monitoring area.
Watched places
Places saved on this device appear here with scripting enabled.
Map
NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked . Data: NOAA/NWS, NOAA/SPC.
Agency warning geometry · no observed imagery displayed
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.
Cached lightning observations have not loaded. An empty map is not zero lightning.
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.
Stored snow depth · footprint valid 2026-10-18 09:00:00 UTC, picture retrieved 2026-10-18 17:08:06.654 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 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.
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 ; feed generated . Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.
Station and river observations (44)
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 ·
- K1H2 · K1H2 · current ·
- K3LF · K3LF · current ·
- KAJG · KAJG · current ·
- KALN · KALN · current ·
- KARR · KARR · current ·
- KBMI · KBMI · current ·
- KC75 · KC75 · current ·
- KCIR · KCIR · current ·
- KDEC · KDEC · current ·
- KDKB · KDKB · current ·
- KDPA · KDPA · current ·
- KENL · KENL · current ·
- KFEP · KFEP · current ·
- KFOA · KFOA · current ·
- KFWC · KFWC · current ·
- KGBG · KGBG · current ·
- KHSB · KHSB · current ·
- KI63 · KI63 · current ·
- KIGQ · KIGQ · current ·
- KIJX · KIJX · current ·
- KIKK · KIKK · current ·
- KJOT · KJOT · current ·
- KLOT · KLOT · current ·
- KM30 · KM30 · current ·
- KMDH · KMDH · current ·
- KMDW · KMDW · current ·
- KMLI · KMLI · current ·
- KMQB · KMQB · current ·
- KMWA · KMWA · current ·
- KOLY · KOLY · current ·
- KPIA · KPIA · current ·
- KPNT · KPNT · current ·
- KPPQ · KPPQ · current ·
- KPRG · KPRG · current ·
- KRPJ · KRPJ · current ·
- KRSV · KRSV · current ·
- KSAR · KSAR · current ·
- KSFY · KSFY · current ·
- KSLO · KSLO · current ·
- KSPI · KSPI · current ·
- KTIP · KTIP · current ·
- KUGN · KUGN · current ·
- KVYS · KVYS · current ·
Showing 44 of 44 listed sources. All surface stations and retained trends · All supported gauges and forecasts
Selected details
CloseSurface station KIGQ
current · Observed 2026-10-18 17:15:00 UTC · wind 15 kt, gust 20 kt · temperature 14.5 °C.
Station KIGQ · -87.5282, 41.5412 (longitude, latitude).
Source checked 2026-10-18 17:30:05.012Z · 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: 12; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-17 17:55:00 UTC.
Temperature, dew point and pressure trends
Observed sea-level pressure: no readable observations.
Observed reports as a table (12)
| Observed (UTC) | Wind / gust (kt) | From (° true) | Temperature / dew point (°C) | Pressure (mb) | Visibility (mi) |
|---|---|---|---|---|---|
| 2026-10-17 17:55:00 UTC | 4 / Not reported | 220 | 11.1 / 1.7 | Not reported | 10 or more |
| 2026-10-17 18:15:00 UTC | 4 / Not reported | 250 | 11.4 / 2.1 | Not reported | 10 or more |
| 2026-10-17 18:35:00 UTC | 3 / Not reported | 230 | 11.6 / 2 | Not reported | 10 or more |
| 2026-10-17 18:55:00 UTC | 5 / Not reported | 220 | 12.4 / 1.6 | Not reported | 10 or more |
| 2026-10-17 19:15:00 UTC | 6 / Not reported | 190 | 12.5 / 0.6 | Not reported | 10 or more |
| 2026-10-17 19:35:00 UTC | 4 / Not reported | 210 | 12.5 / 0.8 | Not reported | 10 or more |
| 2026-10-18 15:40:00 UTC | 12 / Not reported | 220 | 12.1 / 0.9 | Not reported | Not reported |
| 2026-10-18 15:55:00 UTC | 13 / Not reported | 200 | 12.9 / 1.2 | Not reported | 10 or more |
| 2026-10-18 16:15:00 UTC | 15 / 19 | 210 | 13 / 0 | Not reported | 10 or more |
| 2026-10-18 16:35:00 UTC | 12 / 18 | 210 | 13.7 / 0.6 | Not reported | 10 or more |
| 2026-10-18 16:55:00 UTC | 14 / Not reported | 220 | 13.9 / 0.7 | Not reported | 10 or more |
| 2026-10-18 17:15:00 UTC | 15 / 20 | 210 | 14.5 / 0.9 | 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 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 2026-10-18 15:40:00 UTC, captured 2026-10-18 15:45:07.850Z; source body SHA-256
cdcafb7cc5748c2e3091575e3a5fbf7196f37890acf2b2ba0a454659d5e53a4e. - Observed 2026-10-18 15:55:00 UTC, captured 2026-10-18 16:00:07.010Z; source body SHA-256
1a64a07f010d8deb579f76e936259499ecd9299f0a3027594b291930b1b61c4d. - Observed 2026-10-18 16:15:00 UTC, captured 2026-10-18 16:30:06.518Z; source body SHA-256
9bcdb526eb278d53447ad49f836a4840190afc933c3fb2bf4aba2dca50f759d5. - Observed 2026-10-18 16:35:00 UTC, captured 2026-10-18 16:45:08.565Z; source body SHA-256
318997703f4116613adcd89b46ba0f2fe1a5417749453f7700d3984bdd9280f6. - Observed 2026-10-18 16:55:00 UTC, captured 2026-10-18 17:00:06.399Z; source body SHA-256
c006e676533fb42ac5e8536e9cb2b841c874883c562d965a13f7c70c3f3b5cfc. - Observed 2026-10-18 17:15:00 UTC, captured 2026-10-18 17:30:06.247Z; source body SHA-256
457b30bce92738d9439cdd493273069e7e4cc6643a013935a5d1913aec4276b6.
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 · Recorded 2026-10-18T17:36:03.452Z
- office-hwo · source-revision · Recorded 2026-10-18T17:35:05.400Z
- gauge-details · source-revision · Recorded 2026-10-18T17:35:04.944Z
- gauges-observed · source-revision · Recorded 2026-10-18T17:35:04.944Z
- gauges-forecast · source-revision · Recorded 2026-10-18T17:35:04.944Z
- office-afd · source-revision · Recorded 2026-10-18T17:30:07.417Z
- metars · source-revision · Recorded 2026-10-18T17:30:06.247Z
- hrrr · source-revision · Recorded 2026-10-18T17:30:06.247Z
Recording coverage and limits
- warnings: retained from 2026-10-17T17:36:21.654Z through 2026-10-18T17:36:03.452Z
- outlooks: retained from 2026-10-17T17:36:21.654Z through 2026-10-18T17:35:05.400Z
- hydro: retained from 2026-10-17T17:36:21.654Z through 2026-10-18T17:35:04.944Z
- analysis: retained from 2026-10-17T17:36:21.654Z through 2026-10-18T17:30:06.247Z
- winter: retained from 2026-10-17T17:36:21.654Z through 2026-10-18T17:23:04.980Z
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.
Analysis and model context
Current cached context, independently dated. Regional reference: IL; a reference within a wider monitoring area does not replace the complete warning geography. This section remains separate from the historical replay cursor and official cyclone forecast. Use Forecast to pin a retained model package.
Surface: what stations observe and WPC analyses
On the map
- Observed temperature, °F, above-left of the station
- Observed dew point, °F, below-left
- Observed temperature and dew point are left off the map on a screen this narrow: the table below lists every station’s.
- Observed wind: the staff points to where it blows from; a full barb is 10 kt, a half 5, a pennant 50; a ring is calm
- Analysis cold front
- Analysis warm front
- Analysis stationary front
- Analysis occluded front
- Analysis dry line
- Analysis trough
- Analysis high and low pressure centres, with their pressure in millibars
WPC’s bulletin does not say which side of a front its symbols go, so this map draws no triangles or half-circles; each front is named on the map and in the list.
Observed 2,102 stations, each at its own time, most between and . Airport and other automated stations’ reports (METARs), as AviationWeather.gov decodes them. Left out: 614 reports flagged by the station for maintenance and no reports that cannot be right; no other quality control is applied here.
Analysis WPC’s surface analysis valid , issued . A forecaster’s analysis of the fronts and pressure centres at that hour, every three hours.
WPC analyses no front across Illinois; troughs are drawn on the map.
Every station in Illinois (44)
| Station | Observed | Temperature | Dew point | Wind | Pressure | Visibility | Weather |
|---|---|---|---|---|---|---|---|
| K06C | 58 °F | 37 °F | 220° 11 kt, gusts 16 kt | — | 10+ mi | — | |
| K1H2 | 59 °F | 34 °F | 160° 6 kt | — | 10+ mi | — | |
| K3LF | 58 °F | 36 °F | 180° 9 kt, gusts 14 kt | — | 10+ mi | — | |
| KAJG | 61 °F | 39 °F | 150° 4 kt | — | 10+ mi | — | |
| KALN | 59 °F | 39 °F | 180° 8 kt | — | 10+ mi | — | |
| KARR | 57 °F | 36 °F | 200° 12 kt, gusts 21 kt | 1031.2 mb | 10+ mi | — | |
| KBMI | 59 °F | 37 °F | 220° 12 kt | 1032.2 mb | 10+ mi | — | |
| KC75 | 58 °F | 36 °F | 220° 10 kt, gusts 15 kt | — | 10+ mi | — | |
| KCIR | 63 °F | 40 °F | calm | — | 10+ mi | — | |
| KDEC | 58 °F | 38 °F | 180° 10 kt | 1032.7 mb | 10+ mi | — | |
| KDKB | 58 °F | 39 °F | 200° 14 kt, gusts 18 kt | — | 10+ mi | — | |
| KDPA | 58 °F | 37 °F | 220° 16 kt, gusts 23 kt | 1031.4 mb | 10+ mi | — | |
| KENL | 61 °F | 37 °F | 150° 8 kt | — | 10+ mi | — | |
| KFEP | 60 °F | 40 °F | 220° 17 kt, gusts 21 kt | — | 10+ mi | — | |
| KFOA | 61 °F | 39 °F | 170° 7 kt | — | 10+ mi | — | |
| KFWC | 59 °F | 36 °F | 150° 5 kt | — | 10+ mi | — | |
| KGBG | 60 °F | 42 °F | 210° 12 kt, gusts 17 kt | — | 10+ mi | — | |
| KHSB | 62 °F | 41 °F | 160° 6 kt | — | 10+ mi | — | |
| KI63 | 61 °F | 38 °F | 170° 11 kt, gusts 14 kt | — | 10+ mi | — | |
| KIGQ | 58 °F | 34 °F | 210° 15 kt, gusts 20 kt | — | 10+ mi | — | |
| KIJX | 60 °F | 37 °F | 160° 9 kt | — | 10+ mi | — | |
| KIKK | 60 °F | 33 °F | 210° 11 kt, gusts 14 kt | — | 10+ mi | — | |
| KJOT | 60 °F | 37 °F | 200° 10 kt, gusts 14 kt | — | 10+ mi | — | |
| KLOT | 57 °F | 36 °F | 220° 12 kt, gusts 18 kt | — | 10+ mi | — | |
| KM30 | 62 °F | 36 °F | calm | — | 10+ mi | — | |
| KMDH | 60 °F | 38 °F | 170° 8 kt | 1032.5 mb | 10+ mi | — | |
| KMDW | 58 °F | 35 °F | 220° 12 kt | 1031.3 mb | 10+ mi | — | |
| KMLI | 61 °F | 39 °F | 210° 14 kt, gusts 21 kt | 1029.3 mb | 10+ mi | — | |
| KMQB | 62 °F | 39 °F | 210° 12 kt, gusts 17 kt | — | 10+ mi | — | |
| KMWA | 61 °F | 37 °F | 170° 9 kt | — | 10+ mi | — | |
| KOLY | 61 °F | 38 °F | 160° 8 kt | — | 10+ mi | — | |
| KPIA | 58 °F | 37 °F | 190° 14 kt | 1031.3 mb | 10+ mi | — | |
| KPNT | 59 °F | 35 °F | 210° 10 kt, gusts 19 kt | — | 10+ mi | — | |
| KPPQ | 61 °F | 38 °F | 190° 6 kt | — | 10+ mi | — | |
| KPRG | 60 °F | 36 °F | 160° 9 kt | — | 10+ mi | — | |
| KRPJ | 60 °F | 38 °F | 200° 12 kt, gusts 15 kt | — | 10+ mi | — | |
| KRSV | 59 °F | 39 °F | 160° 8 kt | — | 6 mi | HZ | |
| KSAR | 60 °F | 36 °F | 200° 5 kt | — | 10+ mi | — | |
| KSFY | 61 °F | 41 °F | 190° 12 kt, gusts 17 kt | — | 10+ mi | — | |
| KSLO | 61 °F | 40 °F | not given | — | 10+ mi | — | |
| KSPI | 60 °F | 36 °F | 190° 10 kt | 1032.1 mb | 10+ mi | — | |
| KTIP | 59 °F | 37 °F | 230° 11 kt | — | 10+ mi | — | |
| KUGN | 58 °F | 38 °F | 220° 14 kt | 1029.9 mb | 10+ mi | — | |
| KVYS | — | — | 220° 12 kt, gusts 17 kt | — | 10+ mi | — |
Surface observations checked · Data: NOAA/NWS Aviation Weather Center
WPC surface analysis checked · Data: NOAA/WPC
Spotlight: SPC Day 1 outlook
1 of 15Watches
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.
Drawn by the Analysis tab’s own renderer. Data: NOAA/SPC, NOAA/NCEP.
Flash-flood risk, Day 1
- Marginal
WPC’s excessive rainfall outlook, to , issued : 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.
Data: NOAA/WPC, NOAA/NSSL MRMS.
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 to , issued . 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, to , issued . Outlines, as WPC draws them. Data: NOAA/NWS/WPC.
Winter watches, warnings and advisories
No winter or cold watch, warning or advisory in force in this area.
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.
Data: NOAA/NWS/NOHRSC. Snow analysis, not a measurement at a place.
WPC’s heavy snow and icing discussion
Issued , for to . WPC’s words, as written. Data: NOAA/NWS/WPC.
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.
Data: NOAA/NHC, JTWC.
Radar
NOAA’s radar for the area, loaded by your browser as on the Radar page.
Live tiles; the radar keeps no last-good copy.
What changed, last 60 minutes
Nothing has changed in the last 60 minutes.
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
No warning, watch or advisory for these hazards is in force in this area.
NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.
Sources
NWS warnings and SPC watches checked
NWS watches and advisories checked
SPC mesoscale discussions checked
SPC Day 1 outlook checked
WPC excessive rainfall checked
NWPS river gauges checked
WPC WSSI checked
WPC WSSI-P checked
WPC snow and ice chances checked
WPC heavy snow and icing discussion checked
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.