Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 31, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 3, 2021, 2:42 PM CDT for Lewis County, Marion County, Missouri. It was in force for 29 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, 2:42 PM CDT (19:42 UTC)
- Expired
- May 3, 2021, 3:11 PM CDT
- In force
- 29 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Lewis County, MO, Marion County, MO
The radar
The St Louis radar (KLSX), 164 km from the middle of the area, began a volume at 19:43 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, 2:50 PM CDT | HAIL 1.25 | Maywood, MO | REPORTED IN MAYWOOD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.7 hours before the alert went out and 203 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
- 29 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 509 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
820
WUUS53 KLSX 031942
SVRLSX
MOC111-127-032030-
/O.NEW.KLSX.SV.W.0031.210503T1942Z-210503T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
242 PM CDT Mon May 3 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Marion County in northeastern Missouri...
Southeastern Lewis County in northeastern Missouri...
* Until 330 PM CDT.
* At 242 PM CDT, a severe thunderstorm was located over Maywood,
moving northeast at 35 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Law enforcement reported golf ball size hail near Durham.
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...
La Grange, Ewing, Maywood and Taylor.
This also includes Wakonda State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4006 9149 4003 9150 3992 9143 3988 9175
3995 9176 4002 9170 4005 9160
TIME...MOT...LOC 1942Z 238DEG 28KT 3997 9161
HAIL...1.75IN
WIND...60MPH
$$
Glass2 follow-up statements
170
WWUS53 KLSX 031951
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
251 PM CDT Mon May 3 2021
MOC111-127-032030-
/O.CON.KLSX.SV.W.0031.000000T0000Z-210503T2030Z/
Marion MO-Lewis MO-
251 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR NORTH CENTRAL MARION AND SOUTHEASTERN LEWIS COUNTIES...
At 250 PM CDT, a severe thunderstorm was located over Maywood, moving
east at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Maywood and Taylor.
This also includes Wakonda State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
&&
LAT...LON 4001 9149 3992 9143 3989 9165 3994 9166
3997 9162 4001 9158
TIME...MOT...LOC 1950Z 260DEG 27KT 3995 9157
HAIL...1.75IN
WIND...60MPH
$$
Glass164
WWUS53 KLSX 032011
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
311 PM CDT Mon May 3 2021
MOC111-127-032020-
/O.CAN.KLSX.SV.W.0031.000000T0000Z-210503T2030Z/
Marion MO-Lewis MO-
311 PM CDT Mon May 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MARION AND
SOUTHEASTERN LEWIS COUNTIES IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 4001 9149 3992 9143 3989 9165 3994 9166
3997 9162 4001 9158
TIME...MOT...LOC 2009Z 238DEG 28KT 4004 9139
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 2:22 PM CDT | Severe Thunderstorm Warning | LSX | Lewis, Marion, Shelby | 38 min |
| May 3, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Lewis, Marion | 51 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 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.