Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 194, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 2012, 5:01 PM CDT for Franklin County, Missouri. It was in force for 13 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
- Jul 7, 2012, 5:01 PM CDT (22:01 UTC)
- Expired
- Jul 7, 2012, 5:14 PM CDT
- In force
- 13 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Franklin County, MO
The radar
The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 22:03 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
Lincoln, IL (KILX), launched 12:00Z, 10.0 hours before the alert went out and 290 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
- 2666 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
912
WUUS53 KLSX 072201
SVRLSX
MOC071-072230-
/O.NEW.KLSX.SV.W.0194.120707T2201Z-120707T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
501 PM CDT SAT JUL 7 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 530 PM CDT
* AT 453 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ST. CLAIR...
AND MOVING WEST AT 10 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF CENTRAL FRANKLIN COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3834 9113 3844 9105 3837 9091 3827 9098
TIME...MOT...LOC 2159Z 101DEG 10KT 3836 9105
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY2 follow-up statements
637
WWUS53 KLSX 072207
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 PM CDT SAT JUL 7 2012
MOC071-072230-
/O.CON.KLSX.SV.W.0194.000000T0000Z-120707T2230Z/
FRANKLIN MO-
507 PM CDT SAT JUL 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
FRANKLIN COUNTY UNTIL 530 PM CDT...
AT 503 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ST. CLAIR...
AND MOVING WEST AT 10 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. TREE DAMAGE AND FALLEN POWER
LINES HAVE BEEN REPORTED ON THE WEST SIDE OF ST. CLAIR.
HIGHWAY 47 IS PARTIALLY BLOCKED SOUTH OF INTERSTATE 44.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF CENTRAL FRANKLIN COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3834 9113 3844 9105 3837 9091 3827 9098
TIME...MOT...LOC 2205Z 101DEG 10KT 3836 9107
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY670 WWUS53 KLSX 072214 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 514 PM CDT SAT JUL 7 2012 MOC071-072224- /O.CAN.KLSX.SV.W.0194.000000T0000Z-120707T2230Z/ FRANKLIN MO- 514 PM CDT SAT JUL 7 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FRANKLIN COUNTY 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 GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 3834 9113 3844 9105 3837 9091 3827 9098 TIME...MOT...LOC 2214Z 101DEG 10KT 3836 9110 $$ KANOFSKY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:29 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 29 min |
| Jul 7, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 41 min |
| Jul 7, 6:19 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Francois, Washington | 41 min |
| Jul 7, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 33 min |
| Jul 7, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 44 min |
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.