Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 3, 2021, 6:45 PM CDT for Montgomery County, Illinois. It was in force for 23 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 3, 2021, 6:45 PM CDT (23:45 UTC)
- Expired
- May 3, 2021, 7:08 PM CDT
- In force
- 23 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Montgomery County, IL
The radar
The Lincoln radar (KILX), 90 km from the middle of the area, began a volume at 23:48 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 3, 6:55 PM CDT | HAIL 1.5 | Farmersville, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 3, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 117 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
707
WUUS53 KLSX 032345
SVRLSX
ILC135-040030-
/O.NEW.KLSX.SV.W.0037.210503T2345Z-210504T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
645 PM CDT Mon May 3 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Montgomery County in south central Illinois...
* Until 730 PM CDT.
* At 644 PM CDT, a severe thunderstorm was located over Girard,
moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Hillsboro, Raymond, Witt, White Oak, Farmersville, Waggoner, Harvel
and Honey Bend.
This includes Interstate 55 in Illinois between exits 60 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3923 8932 3924 8970 3952 8970 3952 8953
3935 8953 3935 8932
TIME...MOT...LOC 2344Z 275DEG 36KT 3941 8977
HAIL...1.00IN
WIND...60MPH
$$
Glass2 follow-up statements
438
WWUS53 KLSX 032356
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
656 PM CDT Mon May 3 2021
ILC135-040030-
/O.CON.KLSX.SV.W.0037.000000T0000Z-210504T0030Z/
Montgomery IL-
656 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHWESTERN MONTGOMERY COUNTY...
At 655 PM CDT, a severe thunderstorm was located near Farmersville,
moving east at 40 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Hillsboro, Raymond, Witt, White Oak, Farmersville, Waggoner, Harvel
and Honey Bend.
This includes Interstate 55 in Illinois between exits 60 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3923 8932 3924 8970 3952 8970 3952 8953
3935 8953 3935 8932
TIME...MOT...LOC 2355Z 275DEG 36KT 3940 8962
HAIL...1.25IN
WIND...60MPH
$$
Glass288
WWUS53 KLSX 040008
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
708 PM CDT Mon May 3 2021
ILC135-040018-
/O.CAN.KLSX.SV.W.0037.000000T0000Z-210504T0030Z/
Montgomery IL-
708 PM CDT Mon May 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONTGOMERY COUNTY
IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
south central and southwestern Illinois.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
St Louis.
LAT...LON 3923 8932 3924 8970 3952 8970 3952 8953
3935 8953 3935 8932
TIME...MOT...LOC 0005Z 275DEG 36KT 3939 8945
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 51 min |
| May 3, 3:27 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 48 min |
| May 3, 4:13 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 28 min |
| May 3, 6:13 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 47 min |
| May 3, 6:32 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 32 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.