Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 42, NWS St. Louis, MO

March 15, 2012Crawford County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 15, 2012, 1:56 PM CDT for Crawford County, Washington County, Missouri. It was in force for 49 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, 1:56 PM CDT (18:56 UTC)
Expired: Mar 15, 2012, 2:45 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Crawford County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 18:56 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 12:00Z, 6.9 hours before the alert went out and 266 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1947 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 105 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.

470 
WUUS53 KLSX 151856
SVRLSX
MOC055-221-151945-
/O.NEW.KLSX.SV.W.0042.120315T1856Z-120315T1945Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  WEST CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 245 PM CDT

* AT 152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 5 MILES SOUTHEAST OF LEASBURG...OR 7 MILES
  NORTHEAST OF STEELVILLE...AND MOVING EAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ANTHONIES MILL.

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 3816 9104 3793 9102 3793 9134 3811 9136
TIME...MOT...LOC 1856Z 265DEG 8KT 3803 9123
WIND...HAIL <50MPH 1.00IN

$$

TRUETT

2 follow-up statements

953 
WWUS53 KLSX 151926
SVSLSX

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

MOC055-221-151945-
/O.CON.KLSX.SV.W.0042.000000T0000Z-120315T1945Z/
CRAWFORD MO-WASHINGTON MO-
226 PM CDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
WASHINGTON AND CENTRAL CRAWFORD COUNTIES UNTIL 245 PM CDT...

AT 221 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 6 MILES SOUTHWEST OF ANTHONIES MILL...MOVING EAST
AT 5 MPH.

LOCATIONS IMPACTED INCLUDE...
  ANTHONIES MILL.

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 3816 9104 3793 9102 3793 9134 3811 9136
TIME...MOT...LOC 1926Z 277DEG 5KT 3802 9115
WIND...HAIL <50MPH 1.00IN

$$

TRUETT

775 
WWUS53 KLSX 151948
SVSLSX

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

MOC055-221-151957-
/O.EXP.KLSX.SV.W.0042.000000T0000Z-120315T1945Z/
CRAWFORD MO-WASHINGTON MO-
248 PM CDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL WASHINGTON AND
CENTRAL CRAWFORD COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

HOWEVER...SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH SEVERAL 
OF THE STORMS THAT WILL BE PASSING THROUGH NORTHEAST CRAWFORD AND 
NORTHWEST WASHINGTON COUNTIES THROUGH 315 PM.  

LAT...LON 3816 9104 3793 9102 3793 9134 3811 9136
TIME...MOT...LOC 1926Z 277DEG 5KT 3802 9115

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 14, 7:00 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	45 min
Mar 15, 2:22 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	19 min
Mar 15, 3:11 PM CDT	Flash Flood Warning	LSX	Crawford, Washington	3 hr
Mar 15, 3:19 PM CDT	Severe Thunderstorm Warning	LSX	Washington	26 min
Mar 15, 3:23 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	37 min
Mar 15, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	48 min
Mar 15, 3:47 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	19 min
Mar 15, 3:48 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	42 min
Mar 15, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	46 min
Mar 15, 4:12 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	33 min
Mar 15, 4:26 PM CDT	Flash Flood Warning	LSX	Crawford, Washington	3 hr
Mar 15, 4:46 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	29 min
Mar 15, 4:50 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	40 min
Mar 15, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	26 min
Mar 15, 6:16 PM CDT	Flash Flood Warning	LSX	Crawford, Washington	4 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every 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.