Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS St. Louis, MO

March 15, 2012Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 15, 2012, 11:33 PM CDT for Osage County, Missouri. It was in force for 42 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
Mar 15, 2012, 11:33 PM CDT (04:33 UTC)
Expired
Mar 16, 2012, 12:15 AM CDT
In force
42 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Osage County, MO

The radar

The St Louis radar (KLSX), 118 km from the middle of the area, began a volume at 04:35 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.6 hours before the alert went out and 232 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 2012-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1409 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 2012-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
1409 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1284 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
150 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.

710 
WUUS53 KLSX 160433
SVRLSX
MOC151-160515-
/O.NEW.KLSX.SV.W.0068.120316T0433Z-120316T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1133 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 1215 AM CDT

* AT 1130 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR WESTPHALIA...OR 11 MILES SOUTHWEST OF
  LINN...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RICH FOUNTAIN...FREEBURG AND KOELTZTOWN.

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 3834 9214 3846 9210 3847 9208 3847 9203
      3849 9201 3851 9201 3852 9203 3853 9202
      3843 9174 3829 9175 3828 9195
TIME...MOT...LOC 0433Z 296DEG 16KT 3840 9202
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY
3 follow-up statements
279 
WWUS53 KLSX 160452
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1152 PM CDT THU MAR 15 2012

MOC151-160515-
/O.CON.KLSX.SV.W.0068.000000T0000Z-120316T0515Z/
OSAGE MO-
1152 PM CDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN OSAGE
COUNTY UNTIL 1215 AM CDT...

AT 1150 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR RICH FOUNTAIN...OR 9 MILES SOUTHWEST OF
LINN...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  RICH FOUNTAIN AND FREEBURG.

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 3832 9207 3851 9195 3843 9174 3829 9175
      3828 9195
TIME...MOT...LOC 0452Z 296DEG 16KT 3836 9192
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY
461 
WWUS53 KLSX 160457
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1157 PM CDT THU MAR 15 2012

MOC151-160515-
/O.CON.KLSX.SV.W.0068.000000T0000Z-120316T0515Z/
OSAGE MO-
1157 PM CDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
OSAGE COUNTY UNTIL 1215 AM CDT...

AT 1155 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR FREEBURG...OR 9 MILES SOUTH OF LINN...MOVING
SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF SOUTHERN OSAGE COUNTY.

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 3828 9195 3834 9201 3845 9197 3837 9174
      3829 9175
TIME...MOT...LOC 0457Z 296DEG 16KT 3835 9190
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY
914 
WWUS53 KLSX 160517
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1217 AM CDT FRI MAR 16 2012

MOC151-160527-
/O.EXP.KLSX.SV.W.0068.000000T0000Z-120316T0515Z/
OSAGE MO-
1217 AM CDT FRI MAR 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL OSAGE COUNTY HAS
EXPIRED...

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

LAT...LON 3828 9195 3834 9201 3845 9197 3837 9174
      3829 9175
TIME...MOT...LOC 0457Z 296DEG 16KT 3835 9190

$$

KANOFSKY

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 15, 7:20 PM CDTFlash Flood WarningLSXCrawford3 hr
Mar 15, 8:10 PM CDTSevere Thunderstorm WarningLSXMadison29 min
Mar 15, 8:36 PM CDTFlash Flood WarningLSXMadison6 hr
Mar 15, 8:56 PM CDTFlash Flood WarningLSXReynolds6 hr
Mar 15, 9:01 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington44 min
Mar 15, 9:07 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington38 min
Mar 15, 9:16 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Gasconade, Montgomery, Osage44 min
Mar 15, 9:39 PM CDTSevere Thunderstorm WarningLSXSaint Charles35 min
Mar 15, 9:44 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington35 min
Mar 15, 9:48 PM CDTSevere Thunderstorm WarningLSXWarren42 min
Mar 15, 9:51 PM CDTSevere Thunderstorm WarningLSXLincoln39 min
Mar 15, 9:58 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Crawford, Franklin, Gasconade, Osage47 min
Mar 15, 10:04 PM CDTFlash Flood WarningLSXCrawford, Washington6 hr
Mar 15, 10:23 PM CDTFlash Flood WarningLSXCole, Osage6 hr
Mar 15, 10:51 PM CDTFlash Flood WarningLSXGasconade6 hr
Mar 16, 12:42 AM CDTSevere Thunderstorm WarningLSXBoone20 min
Mar 16, 12:43 AM CDTSevere Thunderstorm WarningLSXCallaway47 min
Mar 16, 1:00 AM CDTSevere Thunderstorm WarningLSXGasconade32 min
Mar 16, 4:03 AM CDTAreal Flood WarningLSXOsage6 hr
Mar 16, 4:08 AM CDTAreal Flood WarningLSXCrawford6 hr
Mar 16, 3:58 PM CDTAreal Flood WarningLSXMadison4 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012Every severe thunderstorm warning in 2012

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.