Alert archive / Illinois / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 337, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 27, 2026, 6:44 PM CDT for Vermilion County, Illinois. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2026, 6:44 PM CDT (23:44 UTC)
- Expired
- Jul 27, 2026, 7:15 PM CDT
- In force
- 31 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Vermilion County, IL
The radar
The Indianapolis radar (KIND), 131 km from the middle of the area, began a volume at 23:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 27, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 88 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3689 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 801 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.1
The text
As transmitted.
187
WUUS53 KILX 272344
SVRILX
ILC183-280015-
/O.NEW.KILX.SV.W.0337.260727T2344Z-260728T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
644 PM CDT Mon Jul 27 2026
The National Weather Service in Lincoln has issued a
* Severe Thunderstorm Warning for...
Northeastern Vermilion County in east central Illinois...
* Until 715 PM CDT.
* At 644 PM CDT, a severe thunderstorm was located 7 miles southeast
of Rossville, or 11 miles southeast of Hoopeston, moving southeast
at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will remain over mainly rural areas of
northeastern Vermilion County, including the following locations...
Alvin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4036 8765 4040 8753 4015 8753
TIME...MOT...LOC 2344Z 331DEG 22KT 4032 8754
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Copple1 follow-up statement
835 WWUS53 KILX 280005 SVSILX Severe Weather Statement National Weather Service Lincoln IL 705 PM CDT Mon Jul 27 2026 ILC183-280015- /O.EXP.KILX.SV.W.0337.000000T0000Z-260728T0015Z/ Vermilion- 705 PM CDT Mon Jul 27 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN VERMILION COUNTY WILL EXPIRE AT 715 PM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. A Severe Thunderstorm Watch remains in effect until 800 PM CDT for east central Illinois. && LAT...LON 4036 8765 4040 8753 4015 8753 TIME...MOT...LOC 0005Z 331DEG 22KT 4022 8747 $$ Copple
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 27, 2:18 PM CDT, 4 hours 26 minutes earlier. Its key messages:
- Oppressive heat and humidity continues through early evening with heat indices peaking between 105 and 115 degrees.
- Multiple thunderstorm complexes will move across IL this afternoon/evening, presenting a conditional threat for severe weather. Damaging winds (60-70+ mph gusts) and heavy rains are a risk especially in eastern and southeastern IL this afternoon and early evening.
- A cold front will bring relief from the high heat and humidity on Tuesday, transitioning us back to near normal temperatures and humidity levels during mid week.
Area forecast discussion, Jul 27, 2:18 PM CDT, 4 hours 26 minutes before
Area Forecast Discussion National Weather Service Lincoln IL 218 PM CDT Mon Jul 27 2026 .KEY MESSAGES... - Oppressive heat and humidity continues through early evening with heat indices peaking between 105 and 115 degrees. - Multiple thunderstorm complexes will move across IL this afternoon/evening, presenting a conditional threat for severe weather. Damaging winds (60-70+ mph gusts) and heavy rains are a risk especially in eastern and southeastern IL this afternoon and early evening. - A cold front will bring relief from the high heat and humidity on Tuesday, transitioning us back to near normal temperatures and humidity levels during mid week. && .DISCUSSION... Issued at 218 PM CDT Mon Jul 27 2026 Outside of the storm risk today, it has been very hot and humid today. Heat indices have been around 100-105 so far but still have time to increase to about 115 degrees in some spots. The Extreme Heat Warning continues until tonight at 9 pm. If thunderstorms materialize and move in during the afternoon and early evening, it would cool temps/heat indices and would likely end the heat headlines earlier than 9 pm. Beyond today, temperatures become more seasonable and less humid with highs in the 80s and lows in the 60s through next week. Today's forecast has been a doozy. The models haven't been of the greatest assistance recently with this round of convection. We have an Enhanced Risk (level 3 of 5) for areas near and north of a Henry to Marshall line and a Slight Risk (level 2 of 5) elsewhere for today. Primarily this risk is for damaging winds, potentially stronger than 70 mph, but there is also a 2% tornado risk for the area within the Enhanced Risk. Our 12z sounding shows MUCAPE over 5500 J/kg, effective shear of ~50 knots, and PWATs of nearly 2 inches. A shortwave is pulsing through this afternoon across Illinois and Indiana, based off GFS 500 mb vorticity. The storms currently over the Chicago-Land area may clip eastern IL as it drops south into Indiana and they are evolving into a damaging wind threat as it transitions to a linear mode rather than supercellular. It is starting to trend towards areas west of I- 55 may not see any of the severe threat today. There may be some showers/storms that direction but it looks like the main show will remain east of I-55 this afternoon/evening. An additional wave may move behind it that will also drop south, potentially riding the IL/IN border, but could possibly be weaker in strength, based off the HRRR. The HRRR's 16z and 17z runs are picking up the active convection well. The storms should have exited by 10 pm tonight. Storms will be moving to the south-southeast at 30-40 mph this afternoon/evening. The next chance for showers and thunderstorms comes in on Friday into Saturday as a shortwave moves through the area. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1233 PM CDT Mon Jul 27 2026 VFR conditions are expected through the 18z period. There is a chance for strong storms later this afternoon into the evening hours. Confidence in the location and timing of the storms is low so opted for the PROB30 group for 21-01z. Heavy rain will be accompanying any storms, so lowered visibility is possible if they move through. The winds will be veering throughout the period, becoming northerly by the morning. && .ILX WATCHES/WARNINGS/ADVISORIES... Extreme Heat Warning until 9 PM CDT this evening for ILZ027>031-036>038-040>057-061>063-066>068-071>073. && KEY MESSAGES...Copple DISCUSSION...Copple AVIATION...Copple
Hazardous weather outlook, Jul 27, 2:26 PM CDT, 4 hours 18 minutes before
Hazardous Weather Outlook National Weather Service Lincoln IL 226 PM CDT Mon Jul 27 2026 ILZ027>031-036>038-040>057-061>063-066>068-071>073-281930- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler- Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott- Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- 226 PM CDT Mon Jul 27 2026 This Hazardous Weather Outlook is for central Illinois, east central Illinois, southeast Illinois and west central Illinois. .DAY ONE...Tonight. Heat index values of 105 to 115 degrees will continue into this evening, then ease overnight. Scattered storms are expected across portions of east central Illinois east of I-57 with isolated storms possible west of I-57. A few storms will be capable of producing wind gusts in excess of 70 mph. Isolated large hail and a brief tornado are also possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms are expected from Thursday night into Saturday. The severe weather threat appears low at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. Expected storm motion is toward the southeast around 35 mph. Deubelbeiss
In the hours before
Special weather statement, Jul 27, 4:26 PM CDT, 2 hours 18 minutes before
Special Weather Statement
National Weather Service Lincoln IL
426 PM CDT Mon Jul 27 2026
ILZ051>053-272200-
Sangamon-Macon-Christian-
426 PM CDT Mon Jul 27 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN CHRISTIAN...
NORTHEASTERN SANGAMON AND SOUTHWESTERN MACON COUNTIES THROUGH 500 PM
CDT...
At 425 PM CDT, Doppler radar was tracking a strong thunderstorm over
Buffalo, or 13 miles east of Springfield, moving southeast at 35 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Taylorville, Rochester, Riverton, Kincaid, Blue Mound, Edinburg,
Stonington, Illiopolis, Niantic, Mechanicsburg, Dawson, Buffalo,
Mount Auburn, Jeisyville, Spaulding, Clear Lake, Willeys, Sharpsburg,
Taylorville Municipal Airport, and Langleyville.
This includes Interstate 72 between mile markers 105 and 128.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3984 8959 3993 8941 3992 8940 3992 8921
3966 8903 3949 8935
TIME...MOT...LOC 2125Z 324DEG 32KT 3984 8942
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
CoppleThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 9:30 PM CDT | Special Weather Statement | ILX | Lawrence | 15 min |
| Jul 26, 9:46 PM CDT | Severe Thunderstorm Warning | ILX | Lawrence | 15 min |
| Jul 26, 10:00 PM CDT | Special Weather Statement | ILX | Lawrence | 15 min |
| Jul 26, 10:15 PM CDT | Special Weather Statement | ILX | Lawrence | 15 min |
| Jul 27, 2:02 AM CDT | Heat Advisory | ILX | Clark, Edgar, Vermilion | 9 hr |
| Jul 27, 2:24 AM CDT | Flash Flood Warning | ILX | Effingham | 4 hr |
| Jul 27, 2:31 AM CDT | Areal Flood Advisory | ILX | Clay | 3 hr |
| Jul 27, 2:50 AM CDT | Flash Flood Warning | ILX | Clay | 5 hr |
| Jul 27, 4:12 AM CDT | Severe Thunderstorm Warning | ILX | Clay | 33 min |
| Jul 27, 5:01 AM CDT | Severe Thunderstorm Warning | ILX | Clay, Effingham, Jasper | 44 min |
| Jul 27, 6:27 AM CDT | Areal Flood Warning | ILX | Effingham | 3 hr |
| Jul 27, 7:11 AM CDT | Severe Thunderstorm Warning | ILX | Cumberland | 14 min |
| Jul 27, 3:58 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Menard, Sangamon | 29 min |
| Jul 27, 4:26 PM CDT | Special Weather Statement | ILX | Christian | 34 min |
| Jul 27, 5:17 PM CDT | Severe Thunderstorm Warning | ILX | Edgar, Vermilion | 43 min |
| Jul 27, 5:45 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 60 min |
| Jul 27, 6:07 PM CDT | Tornado Warning | ILX | Vermilion | 38 min |
| Jul 27, 6:13 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Edgar | 62 min |
| Jul 27, 6:42 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Crawford | 48 min |
| Jul 27, 6:59 PM CDT | Flash Flood Warning | ILX | Clark, Edgar | 3 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.