Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 13, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 27, 2021, 5:26 PM CDT for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri; Madison County, Illinois. It was in force for 38 min. 9 reports 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
- Mar 27, 2021, 5:26 PM CDT (22:26 UTC)
- Expired
- Mar 27, 2021, 6:04 PM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Madison County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 39 km from the middle of the area, began a volume at 22:29 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 |
|---|---|---|---|
| Mar 27, 5:27 PM CDT | HAIL 1 | Hazelwood, MO | |
| Mar 27, 5:27 PM CDT | HAIL 1 | Hazelwood, MO | CORRECTS PREVIOUS HAIL REPORT FROM HAZELWOOD. |
| Mar 27, 5:29 PM CDT | HAIL 0.75 | 1 Nnw Hazelwood, MO | REPORT FROM MPING: DIME (0.75 IN.). |
| Mar 27, 5:29 PM CDT | HAIL 1 | Florissant, MO | VIA FACEBOOK REPORT WITH PICTURE. |
| Mar 27, 5:31 PM CDT | HAIL 0.75 | 1 Sse Florissant, MO | REPORT FROM MPING: DIME (0.75 IN.). |
| Mar 27, 5:33 PM CDT | HAIL 0.75 | 1 Sse Florissant, MO | REPORT FROM MPING: DIME (0.75 IN.). |
| Mar 27, 5:35 PM CDT | HAIL 1 | 1 Wnw Spanish Lake, MO | |
| Mar 27, 5:38 PM CDT | HAIL 0.5 | Florissant, MO | |
| Mar 27, 5:54 PM CDT | HAIL 0.75 | Wood River, 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 |
|---|---|---|---|
| Mar 27, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.4 hours before the alert went out and 209 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
- 1078 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 369 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
152
WUUS53 KLSX 272226
SVRLSX
ILC119-MOC183-189-510-272315-
/O.NEW.KLSX.SV.W.0013.210327T2226Z-210327T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
526 PM CDT Sat Mar 27 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Western Madison County in southwestern Illinois...
Northeastern St. Louis City in east central Missouri...
East central St. Charles County in east central Missouri...
Northeastern St. Louis County in east central Missouri...
* Until 615 PM CDT.
* At 526 PM CDT, a severe thunderstorm was located over Lambert-St.
Louis International Airport, moving east at 45 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters.
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.
* Locations impacted include...
St. Louis, St. Charles, Florissant, University City, Granite City,
Alton, Maryland Heights, Hazelwood, Collinsville, Edwardsville,
Ferguson, Creve Coeur, Overland, Jennings, St. Ann, Glen Carbon,
Bridgeton, Bellefontaine Neighbors, Wood River and Troy.
This includes the following highways...
Interstate 55 in Illinois near exit 23.
Interstate 70 in Missouri near exit 231.
This also includes Confluence State Park, First Missouri State
Capitol Historic Site, and Horseshoe Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3867 9047 3882 9050 3896 8991 3870 8988
TIME...MOT...LOC 2226Z 259DEG 39KT 3875 9038
HAIL...1.75IN
WIND...60MPH
$$
BRC2 follow-up statements
200
WWUS53 KLSX 272247
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
547 PM CDT Sat Mar 27 2021
MOC510-272256-
/O.CAN.KLSX.SV.W.0013.000000T0000Z-210327T2315Z/
St. Louis City MO-
547 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. LOUIS CITY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southwestern Illinois...and east central Missouri.
LAT...LON 3875 9017 3877 9017 3878 9018 3889 9023
3896 8991 3885 8990 3884 8989 3875 8989
TIME...MOT...LOC 2246Z 256DEG 46KT 3882 9007
$$
ILC119-MOC183-189-272315-
/O.CON.KLSX.SV.W.0013.000000T0000Z-210327T2315Z/
Madison IL-St. Charles MO-St. Louis MO-
547 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR CENTRAL MADISON COUNTY IN SOUTHWESTERN ILLINOIS...EAST CENTRAL
ST. CHARLES AND EASTERN ST. LOUIS COUNTIES IN EAST CENTRAL
MISSOURI...
At 546 PM CDT, a severe thunderstorm was located over South Roxana,
moving east at 55 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters.
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.
Locations impacted include...
Granite City, Alton, Edwardsville, Glen Carbon, Wood River, Bethalto,
Pontoon Beach, Madison, Spanish Lake, East Alton, South Roxana,
Roxana, Hartford, West Alton, Rosewood Heights, Poag and Mitchell.
This also includes Confluence State Park.
This includes Interstate 55 in Illinois near exit 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3875 9017 3877 9017 3878 9018 3889 9023
3896 8991 3885 8990 3884 8989 3875 8989
TIME...MOT...LOC 2246Z 256DEG 46KT 3882 9007
HAIL...1.75IN
WIND...60MPH
$$
BRC869
WWUS53 KLSX 272304 RRA
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
604 PM CDT Sat Mar 27 2021
ILC119-MOC183-189-272313-
/O.CAN.KLSX.SV.W.0013.000000T0000Z-210327T2315Z/
Madison IL-St. Charles MO-St. Louis MO-
604 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MADISON COUNTY IN
SOUTHWESTERN ILLINOIS...EAST CENTRAL ST. CHARLES AND EASTERN ST.
LOUIS COUNTIES IN EAST CENTRAL MISSOURI IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southwestern Illinois...and east central Missouri.
LAT...LON 3875 9017 3877 9017 3878 9018 3889 9023
3896 8991 3885 8990 3884 8989 3875 8989
TIME...MOT...LOC 2302Z 259DEG 39KT 3886 8983
$$
BRCThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 4:16 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Saint Charles, Warren | 44 min |
| Mar 27, 4:23 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 52 min |
| Mar 27, 4:52 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 38 min |
| Mar 27, 5:24 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 15 min |
| Mar 27, 5:36 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 28 min |
| Mar 27, 4:47 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 43 min |
| Mar 27, 5:18 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 42 min |
| Mar 27, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 49 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2021Severe 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.