Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 48, NWS St. Louis, MO

April 10, 2011Crawford County, Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 10, 2011, 11:38 PM CDT for Crawford County, Franklin County, Gasconade County, Missouri. It was in force for 36 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
Apr 10, 2011, 11:38 PM CDT (04:38 UTC)
Expired
Apr 11, 2011, 12:14 AM CDT
In force
36 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 04:40 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

TimeReportWhereRemark
Apr 10, 11:51 PM CDTTSTM WND GST 50Cuba, MONO HAIL REPORTED
Apr 11, 12:08 AM CDTTSTM WND DMG1 Wnw Stanton, MOTHREE TREES BLOWN DOWN ON HIGHWAY JJ BETWEEN WILD OAK ROAD AND ACID MINE ROAD.

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.

IssuedProductOfficeLasted
Apr 10, 6:05 PM CDTTornado WatchSPC7 hr
Apr 10, 7:28 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.6 hours before the alert went out and 258 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.

Skew-T log-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2011-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 601 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2011-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
601 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
1468 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

038 
WUUS53 KLSX 110438
SVRLSX
MOC055-071-073-110530-
/O.NEW.KLSX.SV.W.0048.110411T0438Z-110411T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1138 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHWESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 1230 AM CDT

* AT 1136 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 7 MILES
  NORTH OF ST. JAMES...OR 11 MILES NORTHEAST OF ROLLA...AND MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  STEELVILLE...CUBA...OWENSVILLE...BOURBON...SULLIVAN...BLAND...
  LEASBURG...ROSEBUD...GERALD...BEAUFORT...ROSATI...CANAAN...OAK
  HILL...JAPAN...ST. CLOUD...LESLIE...NOSER MILL AND STANTON.

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 3815 9153 3816 9165 3835 9165 3850 9105
      3820 9108 3820 9110 3804 9110 3791 9111
      3788 9154
TIME...MOT...LOC 0438Z 243DEG 42KT 3810 9164
WIND...HAIL 60MPH 1.00IN

$$

GLASS
2 follow-up statements
358 
WWUS53 KLSX 110500
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1200 AM CDT MON APR 11 2011

MOC073-110511-
/O.CAN.KLSX.SV.W.0048.000000T0000Z-110411T0530Z/
GASCONADE MO-
1200 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR GASCONADE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3790 9140 3814 9140 3821 9137 3842 9136
      3850 9105 3820 9108 3820 9110 3791 9111
TIME...MOT...LOC 0501Z 242DEG 56KT 3826 9120

$$

MOC055-071-110530-
/O.CON.KLSX.SV.W.0048.000000T0000Z-110411T0530Z/
CRAWFORD MO-FRANKLIN MO-
1200 AM CDT MON APR 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
FRANKLIN AND NORTHEASTERN CRAWFORD COUNTIES UNTIL 1230 AM CDT...

AT 1157 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 5 MILES
WEST OF SULLIVAN...MOVING NORTHEAST AT 65 MPH.

LOCATIONS IMPACTED INCLUDE...
  BEAUFORT...LESLIE...NOSER MILL AND STANTON.

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 3790 9140 3814 9140 3821 9137 3842 9136
      3850 9105 3820 9108 3820 9110 3791 9111
TIME...MOT...LOC 0501Z 242DEG 56KT 3826 9120
WIND...HAIL 60MPH 1.00IN

$$

GLASS
834 
WWUS53 KLSX 110514
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1214 AM CDT MON APR 11 2011

MOC055-071-110524-
/O.CAN.KLSX.SV.W.0048.000000T0000Z-110411T0530Z/
CRAWFORD MO-FRANKLIN MO-
1214 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN FRANKLIN AND
NORTHEASTERN CRAWFORD COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF 
THE WARNED AREA.  HOWEVER HEAVY RAIN AND GUSTY WINDS OF 40 TO 50 MPH 
ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 100 AM.

LAT...LON 3790 9140 3814 9140 3821 9137 3842 9136
      3850 9105 3820 9108 3820 9110 3791 9111
TIME...MOT...LOC 0514Z 242DEG 56KT 3835 9097

$$

GLASS

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 8:33 PM CDTSevere Thunderstorm WarningLSXMarion, Ralls42 min
Apr 10, 8:41 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Moniteau34 min
Apr 10, 9:06 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway, Monroe, Ralls39 min
Apr 10, 9:36 PM CDTSevere Thunderstorm WarningLSXAudrain, Monroe, Pike, Ralls30 min
Apr 10, 9:48 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike, Warren42 min
Apr 10, 10:12 PM CDTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls34 min
Apr 10, 10:16 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Osage, Warren44 min
Apr 10, 10:57 PM CDTSevere Thunderstorm WarningLSXFranklin, Lincoln, Saint Charles, Warren48 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.