Alert archive / Missouri / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 237, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 31, 2011, 7:23 AM CDT for 4 counties in Missouri. It was in force for 39 min. 2 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
- May 31, 2011, 7:23 AM CDT (12:23 UTC)
- Expired
- May 31, 2011, 8:02 AM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO
The radar
The St Louis radar (KLSX), 133 km from the middle of the area, began a volume at 12:26 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 31, 7:34 AM CDT | HAIL 1.25 | 4 Nw Guthrie, MO | |
| May 31, 7:35 AM CDT | HAIL 0.75 | 5 W New Bloomfield, MO | 0.25 TO 0.75 INCH HAIL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 0.4 hours before the alert went out and 248 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
- 1497 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 944 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 352 m²/s²
- 0-3 km storm-relative helicity
- 492 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 10.2
The text
As transmitted, in the capitals the NWS used until 2016.
286 WUUS53 KLSX 311223 SVRLSX MOC019-027-051-135-311315- /O.NEW.KLSX.SV.W.0237.110531T1223Z-110531T1315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 723 AM CDT TUE MAY 31 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN BOONE COUNTY IN CENTRAL MISSOURI... SOUTHWESTERN CALLAWAY COUNTY IN CENTRAL MISSOURI... NORTHWESTERN COLE COUNTY IN CENTRAL MISSOURI... EAST CENTRAL MONITEAU COUNTY IN CENTRAL MISSOURI... * UNTIL 815 AM CDT * AT 722 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR ST. MARTINS...OR 8 MILES WEST OF JEFFERSON CITY...AND MOVING NORTHEAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... HOLTS SUMMIT...ASHLAND...FULTON...LAKE MYKEE...NEW BLOOMFIELD... MARION...HARTSBURG...WILTON...GUTHRIE AND CARRINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3897 9218 3880 9180 3846 9239 3856 9254 TIME...MOT...LOC 1223Z 219DEG 44KT 3861 9233 WIND...HAIL <50MPH 1.00IN $$ TILLY
2 follow-up statements
931 WWUS53 KLSX 311248 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 748 AM CDT TUE MAY 31 2011 MOC051-135-311258- /O.CAN.KLSX.SV.W.0237.000000T0000Z-110531T1315Z/ COLE MO-MONITEAU MO- 748 AM CDT TUE MAY 31 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONITEAU AND NORTHWESTERN COLE COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. LAT...LON 3869 9215 3877 9233 3897 9218 3880 9180 TIME...MOT...LOC 1248Z 222DEG 43KT 3885 9209 $$ MOC019-027-311315- /O.CON.KLSX.SV.W.0237.000000T0000Z-110531T1315Z/ BOONE MO-CALLAWAY MO- 748 AM CDT TUE MAY 31 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL CALLAWAY AND SOUTHEASTERN BOONE COUNTIES UNTIL 815 AM CDT... AT 744 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 7 MILES NORTH OF NEW BLOOMFIELD...OR 7 MILES EAST OF ASHLAND...MOVING NORTHEAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... FULTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. && LAT...LON 3869 9215 3877 9233 3897 9218 3880 9180 TIME...MOT...LOC 1248Z 222DEG 43KT 3885 9209 WIND...HAIL <50MPH 1.00IN $$ TILLY
445 WWUS53 KLSX 311302 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 802 AM CDT TUE MAY 31 2011 MOC019-027-311311- /O.CAN.KLSX.SV.W.0237.000000T0000Z-110531T1315Z/ BOONE MO-CALLAWAY MO- 802 AM CDT TUE MAY 31 2011 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CALLAWAY AND SOUTHEASTERN BOONE COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. HOWEVER ANOTHER SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN PORTIONS OF CALLAWAY COUNTY UNTIL 830 AM. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. LAT...LON 3869 9215 3877 9233 3897 9218 3880 9180 TIME...MOT...LOC 1301Z 220DEG 43KT 3896 9198 $$ TILLY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 5:51 AM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 24 min |
| May 31, 6:45 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Monroe | 45 min |
| May 31, 7:25 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Marion, Monroe, Ralls | 50 min |
| May 31, 7:52 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway | 38 min |
| May 31, 8:15 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Montgomery, Pike, Ralls | 26 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2011Every severe thunderstorm warning in 2011
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.