Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 134, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2012, 1:47 AM CDT for Boone County, Callaway County, Cole County, Missouri. It was in force for 32 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 29, 2012, 1:47 AM CDT (06:47 UTC)
- Expired
- Apr 29, 2012, 2:19 AM CDT
- In force
- 32 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Boone County, MO, Callaway County, MO, Cole County, MO
The radar
The St Louis radar (KLSX), 142 km from the middle of the area, began a volume at 06:51 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, 6.8 hours before the alert went out and 245 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.
- Mixed-layer CAPE
- 1804 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 6.0
The text
As transmitted, in the capitals the NWS used until 2016.
426
WUUS53 KLSX 290647
SVRLSX
MOC019-027-051-290730-
/O.NEW.KLSX.SV.W.0134.120429T0647Z-120429T0730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
147 AM CDT SUN APR 29 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN BOONE COUNTY IN CENTRAL MISSOURI...
WEST CENTRAL CALLAWAY COUNTY IN CENTRAL MISSOURI...
NORTHWESTERN COLE COUNTY IN CENTRAL MISSOURI...
* UNTIL 230 AM CDT
* AT 146 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR EASLEY...AND
MOVING EAST AT 25 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
ASHLAND...NEW BLOOMFIELD...HARTSBURG...GUTHRIE AND CARRINGTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 3879 9238 3882 9238 3891 9209 3870 9199
3865 9240 3869 9241 3874 9239 3876 9241
TIME...MOT...LOC 0647Z 252DEG 23KT 3874 9234
HAIL...1.00IN
WIND...<50 MPH
$$
KANOFSKY1 follow-up statement
019
WWUS53 KLSX 290719
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
219 AM CDT SUN APR 29 2012
MOC019-027-051-290730-
/O.CAN.KLSX.SV.W.0134.000000T0000Z-120429T0730Z/
BOONE MO-CALLAWAY MO-COLE MO-
219 AM CDT SUN APR 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN COLE...WEST
CENTRAL CALLAWAY AND SOUTHEASTERN BOONE COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3879 9238 3882 9238 3891 9209 3870 9199
3865 9240 3869 9241 3874 9239 3876 9241
TIME...MOT...LOC 0720Z 237DEG 22KT 3883 9213
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 8:12 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 48 min |
| Apr 28, 8:39 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 36 min |
| Apr 29, 1:44 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 46 min |
| Apr 29, 2:22 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone | 38 min |
| Apr 29, 2:52 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 38 min |
| Apr 29, 3:05 AM CDT | Severe Thunderstorm Warning | LSX | Callaway | 44 min |
| Apr 29, 4:00 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike | 27 min |
| Apr 29, 4:59 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 46 min |
| Apr 29, 4:00 PM CDT | Flash Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 14 more | 15 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.