Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 45, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 16, 2021, 10:36 PM CDT for Fayette County, Montgomery County, Illinois. It was in force for 39 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 16, 2021, 10:36 PM CDT (03:36 UTC)
- Expired
- May 16, 2021, 11:15 PM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Fayette County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 107 km from the middle of the area, began a volume at 03:37 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 16, 10:40 PM CDT | TSTM WND DMG | 3 E Nokomis, IL | TREE DAMAGE. SOCIAL MEDIA REPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.6 hours before the alert went out and 115 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
- 108 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1515 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
074
WUUS53 KLSX 170336
SVRLSX
ILC051-135-170415-
/O.NEW.KLSX.SV.W.0045.210517T0336Z-210517T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1036 PM CDT Sun May 16 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northern Fayette County in south central Illinois...
Southeastern Montgomery County in south central Illinois...
* Until 1115 PM CDT.
* At 1034 PM CDT, severe thunderstorms were located along a line
extending from near Pana to near Van Burensburg, moving east at 20
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. At 3:25 pm tree damage due to thunderstorm winds
was reported in Nokomis, IL.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Ramsey.
This also includes Ramsey Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms. Do not drive
your vehicle through flooded roadways.
&&
LAT...LON 3909 8940 3935 8929 3935 8914 3922 8914
3922 8881 3907 8881
TIME...MOT...LOC 0334Z 280DEG 18KT 3939 8917 3911 8927
HAIL...1.00IN
WIND...60MPH
$$
192 follow-up statements
496
WUUS53 KLSX 170340 CCA
SVRLSX
ILC051-135-170415-
/O.COR.KLSX.SV.W.0045.210517T0336Z-210517T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1040 PM CDT Sun May 16 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northern Fayette County in south central Illinois...
Southeastern Montgomery County in south central Illinois...
* Until 1115 PM CDT.
* At 1038 PM CDT, severe thunderstorms were located along a line
extending from near Pana to near Van Burensburg, moving east at 20
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. At 10:25 PM tree damage due to thunderstorm winds
was reported in Nokomis, IL.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Nokomis, Ramsey, Coffeen, Wrights Corner, Herrick, Fillmore,
Coalton, Ohlman, Bingham, Wenonah, Bayle City and Chapman.
This also includes Ramsey Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3909 8940 3935 8929 3935 8914 3922 8914
3922 8881 3907 8881
TIME...MOT...LOC 0338Z 280DEG 18KT 3939 8917 3911 8927
HAIL...1.00IN
WIND...60MPH
$$
19294
WWUS53 KLSX 170353
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1053 PM CDT Sun May 16 2021
ILC051-135-170415-
/O.CON.KLSX.SV.W.0045.000000T0000Z-210517T0415Z/
Fayette IL-Montgomery IL-
1053 PM CDT Sun May 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR NORTHERN FAYETTE AND EAST CENTRAL MONTGOMERY COUNTIES...
At 1052 PM CDT, severe thunderstorms were located along a line
extending from Pana to near Ramsey, moving east at 20 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Public. At 10:25 PM tree damage due to thunderstorm winds
was reported in Nokomis, IL.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Ramsey, Wrights Corner and Herrick.
This also includes Ramsey Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3912 8924 3935 8921 3935 8914 3922 8914
3922 8881 3911 8881
TIME...MOT...LOC 0352Z 280DEG 18KT 3938 8909 3910 8919
HAIL...0.88IN
WIND...60MPH
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 9:36 PM CDT | Areal Flood Advisory | LSX | Greene, Jersey, Macoupin | 3 hr |
| May 16, 10:58 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 47 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.