Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 25, NWS St. Louis, MO

April 3, 2011Boone County, Cole County, Moniteau County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 2011, 11:21 PM CDT for Boone County, Cole County, Moniteau County, Missouri. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 3, 2011, 11:21 PM CDT (04:21 UTC)
Expired
Apr 4, 2011, 12:00 AM CDT
In force
39 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Boone County, MO, Cole County, MO, Moniteau County, MO

The radar

The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 04:24 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.

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, 4.4 hours before the alert went out and 234 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.

885 
WUUS53 KLSX 040421
SVRLSX
MOC019-051-135-040500-
/O.NEW.KLSX.SV.W.0025.110404T0421Z-110404T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1121 PM CDT SUN APR 3 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BOONE COUNTY IN CENTRAL MISSOURI...
  NORTHWESTERN COLE COUNTY IN CENTRAL MISSOURI...
  MONITEAU COUNTY IN CENTRAL MISSOURI...

* UNTIL MIDNIGHT CDT

* AT 1120 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR TIPTON...AND MOVING EAST AT
  55 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  TIPTON...CALIFORNIA...ASHLAND...CLARKSBURG...MCGIRK...JAMESTOWN...
  RUSSELLVILLE...CENTERTOWN...EASLEY...ST. MARTINS...BRAZITO...
  LATHAM...KLIEVER...LUPUS...MCBAINE...SANDY HOOK...LOHMAN...
  MARION...WILTON AND ELSTON.

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 3869 9284 3869 9263 3892 9250 3892 9216
      3890 9217 3888 9216 3875 9218 3870 9222
      3867 9219 3864 9222 3861 9220 3844 9223
      3851 9274 3860 9285 3867 9285
TIME...MOT...LOC 0422Z 269DEG 47KT 3869 9282
WIND...HAIL 60MPH 0.75IN

$$

GLASS
2 follow-up statements
703 
WWUS53 KLSX 040444
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1144 PM CDT SUN APR 3 2011

MOC019-051-135-040500-
/O.CON.KLSX.SV.W.0025.000000T0000Z-110404T0500Z/
COLE MO-MONITEAU MO-BOONE MO-
1144 PM CDT SUN APR 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BOONE...EASTERN MONITEAU AND NORTHWESTERN COLE COUNTIES UNTIL
MIDNIGHT CDT...

AT 1140 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 6 MILES SOUTH OF MIDWAY TO MCGIRK...MOVING EAST AT 60 MPH. PENNY
SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  ASHLAND...ST. MARTINS...WILTON...MARION...LOHMAN...HARTSBURG AND
  ELSTON.

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 3892 9250 3892 9216 3890 9217 3888 9216
      3875 9218 3870 9222 3867 9219 3864 9222
      3861 9220 3844 9223 3853 9263 3869 9263
TIME...MOT...LOC 0444Z 269DEG 53KT 3889 9236 3863 9244
WIND...HAIL 60MPH 0.75IN

$$

GLASS
274 
WWUS53 KLSX 040500
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1200 AM CDT MON APR 4 2011

MOC019-051-135-040508-
/O.EXP.KLSX.SV.W.0025.000000T0000Z-110404T0500Z/
COLE MO-MONITEAU MO-BOONE MO-
1200 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BOONE...EASTERN
MONITEAU AND NORTHWESTERN COLE COUNTIES WILL EXPIRE AT MIDNIGHT
CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.  A NEW WARNING HAS BEEN ISSUED FOR SOUTHEASTERN BOONE 
AND NORTHERN COLE COUNTIES UNTIL 1245 AM CDT.

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

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 3892 9250 3892 9216 3890 9217 3888 9216
      3875 9218 3870 9222 3867 9219 3864 9222
      3861 9220 3844 9223 3853 9263 3869 9263
TIME...MOT...LOC 0458Z 269DEG 53KT 3889 9209 3863 9218

$$

BRITT

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, 11:54 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway, Cole, Montgomery, Osage35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.