Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 199, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 2012, 6:46 PM CDT for Saint Louis County, Missouri. It was in force for 44 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, 6:46 PM CDT (23:46 UTC)
- Expired
- Jul 7, 2012, 7:30 PM CDT
- In force
- 44 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Saint Louis County, MO
The radar
The St Louis radar (KLSX), 26 km from the middle of the area, began a volume at 23:47 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, 11.8 hours before the alert went out and 230 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.
109
WUUS53 KLSX 072346
SVRLSX
MOC189-080030-
/O.NEW.KLSX.SV.W.0199.120707T2346Z-120708T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
646 PM CDT SAT JUL 7 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 730 PM CDT
* AT 642 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LADUE...AND
MOVING WEST AT 5 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
GLENDALE...WARSON WOODS...FRONTENAC AND DES PERES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3859 9045 3865 9045 3866 9034 3859 9033
TIME...MOT...LOC 2347Z 083DEG 6KT 3862 9038
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY1 follow-up statement
396 WWUS53 KLSX 080029 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 729 PM CDT SAT JUL 7 2012 MOC189-080039- /O.EXP.KLSX.SV.W.0199.000000T0000Z-120708T0030Z/ ST. LOUIS MO- 729 PM CDT SAT JUL 7 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. LOUIS COUNTY WILL EXPIRE AT 730 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 3859 9045 3865 9045 3866 9034 3859 9033 TIME...MOT...LOC 0029Z 083DEG 6KT 3861 9047 $$ KANOFSKY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:01 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 13 min |
| 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 |
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.