Alert archive / Missouri / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 46, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 10, 2011, 10:57 PM CDT for 4 counties in Missouri; Calhoun County, Jersey County, Illinois. It was in force for 48 min. 3 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
- Apr 10, 2011, 10:57 PM CDT (03:57 UTC)
- Expired
- Apr 10, 2011, 11:45 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Jersey County, IL, Franklin County, MO, Lincoln County, MO, Saint Charles County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 28 km from the middle of the area, began a volume at 03:58 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 |
|---|---|---|---|
| Apr 10, 10:57 PM CDT | HAIL 0.25 | Moscow Mills, MO | |
| Apr 10, 11:10 PM CDT | HAIL 0.5 | Wentzville, MO | ESTIMATED WIND SPEED 30 TO 40 MPH AT WENTSVILLE MO |
| Apr 10, 11:32 PM CDT | TSTM WND GST 54 | 4 Nne Orchard Farms, MO |
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 |
|---|---|---|---|
| Apr 10, 6:05 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 4.0 hours before the alert went out and 219 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
- 1523 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1493 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
224
WUUS53 KLSX 110357
SVRLSX
ILC013-083-MOC071-113-183-219-110445-
/O.NEW.KLSX.SV.W.0046.110411T0357Z-110411T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1057 PM CDT SUN APR 10 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN JERSEY COUNTY IN SOUTHWEST ILLINOIS...
NORTH CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
EASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 1145 PM CDT
* AT 1054 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
TRELOAR...OR 7 MILES NORTHEAST OF NEW HAVEN...AND MOVING NORTHEAST
AT 65 MPH.
* LOCATIONS IMPACTED INCLUDE...
WARRENTON...WRIGHT CITY...WENTZVILLE...TROY...LAKE ST. LOUIS...
DARDENNE PRAIRIE...O'FALLON...WELDON SPRING...ST. PAUL...
COTTLEVILLE...ST. PETERS...ST. CHARLES...TRUESDALE...NEW MELLE...
MOSCOW MILLS...HARVESTER...WINFIELD...ORCHARD FARMS...HARDIN AND
FORISTELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
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 3915 9061 3912 9061 3913 9060 3886 9034
3884 9035 3883 9037 3883 9045 3878 9048
3850 9107 3891 9121 3919 9065
TIME...MOT...LOC 0357Z 238DEG 56KT 3873 9110
WIND...HAIL 60MPH 1.00IN
$$
GLASS2 follow-up statements
171
WWUS53 KLSX 110411
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1111 PM CDT SUN APR 10 2011
MOC071-219-110422-
/O.CAN.KLSX.SV.W.0046.000000T0000Z-110411T0445Z/
FRANKLIN MO-WARREN MO-
1111 PM CDT SUN APR 10 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WARREN AND NORTH
CENTRAL FRANKLIN COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3915 9061 3912 9061 3913 9060 3886 9034
3884 9035 3883 9045 3878 9048 3856 9096
3902 9097 3919 9065
TIME...MOT...LOC 0412Z 238DEG 56KT 3885 9081
$$
ILC013-083-MOC113-183-110445-
/O.CON.KLSX.SV.W.0046.000000T0000Z-110411T0445Z/
JERSEY IL-CALHOUN IL-ST. CHARLES MO-LINCOLN MO-
1111 PM CDT SUN APR 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
LINCOLN...ST. CHARLES...CALHOUN AND SOUTHWESTERN JERSEY COUNTIES
UNTIL 1145 PM CDT...
AT 1111 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
WENTZVILLE...MOVING NORTHEAST AT 65 MPH.
LOCATIONS IMPACTED INCLUDE...
O'FALLON...WELDON SPRING...ST. PAUL...COTTLEVILLE...ST. PETERS...
ST. CHARLES...HARVESTER...WINFIELD...ORCHARD FARMS...HARDIN...OLD
MONROE...FOLEY...BEECHVILLE...GOLDEN EAGLE...KAMPVILLE...
BRUSSELS...BATCHTOWN...MEPPEN AND DEER PLAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
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 3915 9061 3912 9061 3913 9060 3886 9034
3884 9035 3883 9045 3878 9048 3856 9096
3902 9097 3919 9065
TIME...MOT...LOC 0412Z 238DEG 56KT 3885 9081
WIND...HAIL 60MPH 1.00IN
$$
GLASS747
WWUS53 KLSX 110441
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1141 PM CDT SUN APR 10 2011
ILC013-083-MOC113-183-110451-
/O.EXP.KLSX.SV.W.0046.000000T0000Z-110411T0445Z/
JERSEY IL-CALHOUN IL-ST. CHARLES MO-LINCOLN MO-
1141 PM CDT SUN APR 10 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN...ST.
CHARLES...CALHOUN AND SOUTHWESTERN JERSEY COUNTIES WILL EXPIRE AT
1145 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 100 AM.
LAT...LON 3915 9061 3912 9061 3913 9060 3886 9034
3884 9035 3883 9045 3878 9048 3856 9096
3902 9097 3919 9065
TIME...MOT...LOC 0441Z 238DEG 56KT 3909 9032
$$
GLASSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 8:33 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 42 min |
| Apr 10, 8:41 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Moniteau | 34 min |
| Apr 10, 9:06 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Monroe, Ralls | 39 min |
| Apr 10, 9:36 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Monroe, Pike, Ralls | 30 min |
| Apr 10, 9:48 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike, Warren | 42 min |
| Apr 10, 10:12 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Pike, Ralls | 34 min |
| Apr 10, 10:16 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Osage, Warren | 44 min |
| Apr 10, 11:38 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade | 36 min |
| Apr 10, 11:35 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin, Madison, Montgomery | 40 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2011Severe Thunderstorm Warnings in Illinois, 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.