Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 26, NWS St. Louis, MO

April 3, 20116 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 2011, 11:54 PM CDT for 6 counties in Missouri. It was in force for 35 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 3, 2011, 11:54 PM CDT (04:54 UTC)
Expired
Apr 4, 2011, 12:29 AM CDT
In force
35 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Montgomery County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 122 km from the middle of the area, began a volume at 04:54 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 3, 11:55 PM CDTTSTM WND DMGColumbia, MOTREES DOWNED INTO POWER LINES IN THE SOUTHWESTERN PART OF COLUMBIA
Apr 4, 12:09 AM CDTTSTM WND GST 65New Bloomfield, MO
Apr 4, 12:09 AM CDTHAIL 0.25New Bloomfield, 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.

IssuedProductOfficeLasted
Apr 3, 8:11 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.9 hours before the alert went out and 265 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 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 342 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 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 square meters per square second.19395878Sfc1 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
342 J/kg
Mixed-layer CIN
-476 J/kg
Mixed-layer LCL
2436 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
263 m²/s²
0-3 km storm-relative helicity
457 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

694 
WUUS53 KLSX 040454
SVRLSX
MOC007-019-027-051-139-151-040545-
/O.NEW.KLSX.SV.W.0026.110404T0454Z-110404T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1154 PM CDT SUN APR 3 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  SOUTHEASTERN BOONE COUNTY IN CENTRAL MISSOURI...
  CALLAWAY COUNTY IN CENTRAL MISSOURI...
  NORTHERN COLE COUNTY IN CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 1245 AM CDT

* AT 1149 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM COLUMBIA TO ST. MARTINS...AND MOVING EAST AT 65 MPH. PENNY
  SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  JEFFERSON CITY...HOLTS SUMMIT...FULTON...MURRY...LAKE MYKEE...NEW
  BLOOMFIELD...AUXVASSE...CHAMOIS...SHAMROCK...WILLIAMSBURG...
  MARTINSBURG...GUTHRIE...CARRINGTON...HATTON...SCHUBERT...
  WAINWRIGHT...OSAGE CITY...BONNOTS MILL...KINGDOM CITY AND TEBBETTS.

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 3902 9235 3920 9163 3853 9165 3849 9239
TIME...MOT...LOC 0454Z 257DEG 56KT 3895 9223 3861 9227
WIND...HAIL 60MPH 0.75IN

$$

GLASS
3 follow-up statements
060 
WWUS53 KLSX 040510
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1210 AM CDT MON APR 4 2011

MOC051-040519-
/O.CAN.KLSX.SV.W.0026.000000T0000Z-110404T0545Z/
COLE MO-
1210 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN COLE COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE 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 3886 9216 3907 9217 3920 9163 3853 9165
      3856 9202 3859 9196 3856 9203 3857 9213
      3860 9220
TIME...MOT...LOC 0509Z 252DEG 64KT 3911 9188 3891 9185
          3872 9191

$$

MOC007-019-027-139-151-040545-
/O.CON.KLSX.SV.W.0026.000000T0000Z-110404T0545Z/
OSAGE MO-CALLAWAY MO-MONTGOMERY MO-BOONE MO-AUDRAIN MO-
1210 AM CDT MON APR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
AUDRAIN...EAST CENTRAL BOONE...MONTGOMERY...CALLAWAY AND NORTHERN
OSAGE COUNTIES UNTIL 1245 AM CDT...

AT 1207 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 6 MILES NORTH OF AUXVASSE TO FULTON TO 7 MILES EAST OF NEW
BLOOMFIELD...MOVING EAST AT 75 MPH.

LOCATIONS IMPACTED INCLUDE...
  CHAMOIS...WILLIAMSBURG...SHAMROCK...MARTINSBURG...MOKANE...
  STEEDMAN...BENTON CITY...REFORM AND PORTLAND.

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 3886 9216 3907 9217 3920 9163 3853 9165
      3856 9202 3859 9196 3856 9203 3857 9213
      3860 9220
TIME...MOT...LOC 0509Z 252DEG 64KT 3911 9188 3891 9185
          3872 9191
WIND...HAIL 60MPH <.75IN

$$

BRITT
733 
WWUS53 KLSX 040519
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1219 AM CDT MON APR 4 2011

MOC019-040529-
/O.CAN.KLSX.SV.W.0026.000000T0000Z-110404T0545Z/
BOONE MO-
1219 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEAST BOONE COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING 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 3883 9196 3911 9200 3920 9163 3871 9164
      3870 9166 3853 9165 3856 9201 3859 9196
      3859 9199 3857 9201
TIME...MOT...LOC 0519Z 252DEG 61KT 3915 9168 3895 9165
          3876 9171

$$

MOC007-027-139-151-040545-
/O.CON.KLSX.SV.W.0026.000000T0000Z-110404T0545Z/
OSAGE MO-CALLAWAY MO-MONTGOMERY MO-AUDRAIN MO-
1219 AM CDT MON APR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
AUDRAIN...MONTGOMERY...EASTERN CALLAWAY AND NORTHEASTERN OSAGE
COUNTIES UNTIL 1245 AM CDT...

AT 1215 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 6 MILES WEST OF MARTINSBURG TO WILLIAMSBURG TO CHAMOIS...MOVING
EAST AT 70 MPH.

LOCATIONS IMPACTED INCLUDE...
  MARTINSBURG.

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 3883 9196 3911 9200 3920 9163 3871 9164
      3870 9166 3853 9165 3856 9201 3859 9196
      3859 9199 3857 9201
TIME...MOT...LOC 0519Z 252DEG 61KT 3915 9168 3895 9165
          3876 9171
WIND...HAIL 60MPH <.75IN

$$

BRITT
482 
WWUS53 KLSX 040529
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1229 AM CDT MON APR 4 2011

MOC007-027-139-151-040539-
/O.CAN.KLSX.SV.W.0026.000000T0000Z-110404T0545Z/
OSAGE MO-CALLAWAY MO-MONTGOMERY MO-AUDRAIN MO-
1229 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL AUDRAIN...
MONTGOMERY...EASTERN CALLAWAY AND NORTHEASTERN OSAGE COUNTIES IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

WIND GUSTS TO 50 MPH ARE STILL POSSIBLE WITH THIS LINE OF STORMS.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 2 AM.

LAT...LON 3883 9196 3911 9200 3920 9163 3871 9164
      3870 9166 3853 9165 3856 9201 3859 9196
      3859 9199 3857 9201
TIME...MOT...LOC 0529Z 252DEG 61KT 3920 9147 3900 9144
          3881 9150

$$

CVKING

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 8:34 PM CDTSevere Thunderstorm WarningLSXKnox40 min
Apr 3, 9:30 PM CDTSevere Thunderstorm WarningLSXLewis30 min
Apr 3, 9:33 PM CDTSevere Thunderstorm WarningLSXLewis24 min
Apr 3, 11:14 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Lewis, Marion, Monroe, Pike and 2 more46 min
Apr 3, 11:21 PM CDTSevere Thunderstorm WarningLSXBoone, Cole, Moniteau39 min
Apr 4, 12:25 AM CDTSevere Thunderstorm WarningLSXBoone, Cole, Moniteau30 min
Apr 4, 3:28 AM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade32 min
Apr 4, 3:55 AM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis35 min
Apr 4, 3:58 PM CDTFreeze WarningLSXBoone, Callaway, Cole, Crawford, Franklin, Gasconade and 12 more16 hr

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.