Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS St. Louis, MO

March 15, 2012Crawford County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 15, 2012, 3:47 PM CDT for Crawford County, Washington County, Missouri. It was in force for 19 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, 3:47 PM CDT (20:47 UTC)
Expired: Mar 15, 2012, 4:06 PM CDT
In force: 19 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Crawford County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 86 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 276 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.

094 
WUUS53 KLSX 152047
SVRLSX
MOC055-221-152130-
/O.NEW.KLSX.SV.W.0047.120315T2047Z-120315T2130Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 430 PM CDT

* AT 345 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 11
  MILES NORTH OF COURTOIS...OR 11 MILES SOUTH OF ANTHONIES MILL. 
  THIS STORM WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  LATTY.

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 3804 9082 3784 9082 3785 9121 3804 9121
TIME...MOT...LOC 2048Z 180DEG 1KT 3792 9109
WIND...HAIL 60MPH 1.00IN

$$

MILLER

1 follow-up statement

271 
WWUS53 KLSX 152106
SVSLSX

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

MOC055-221-152116-
/O.CAN.KLSX.SV.W.0047.000000T0000Z-120315T2130Z/
CRAWFORD MO-WASHINGTON MO-
406 PM CDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WASHINGTON AND EAST
CENTRAL CRAWFORD COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3804 9082 3784 9082 3785 9121 3804 9121
TIME...MOT...LOC 2106Z 180DEG 1KT 3793 9109

$$

MILLER

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, 1:56 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	49 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, 3:48 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.