Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 216, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 8, 2012, 5:57 PM CDT for Saint Louis County, City of Saint Louis, Missouri; Saint Clair County, Illinois. It was in force for 27 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 8, 2012, 5:57 PM CDT (22:57 UTC)
- Expired
- Jul 8, 2012, 6:24 PM CDT
- In force
- 27 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Saint Clair County, IL, City of Saint Louis, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 40 km from the middle of the area, began a volume at 22:57 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, 11.0 hours before the alert went out and 229 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
- 588 J/kg
- Mixed-layer CIN
- -359 J/kg
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
023
WUUS53 KLSX 082257
SVRLSX
ILC163-MOC189-510-082345-
/O.NEW.KLSX.SV.W.0216.120708T2257Z-120708T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
557 PM CDT SUN JUL 8 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
EAST CENTRAL ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. LOUIS CITY IN EAST CENTRAL MISSOURI...
* UNTIL 645 PM CDT
* AT 553 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MEHLVILLE...
AND MOVING NORTH AT 20 MPH.
HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
* LOCATIONS IMPACTED INCLUDE...
LEMAY...LAKESHIRE...AFFTON...CAHOKIA...SHREWSBURY...WEBSTER
GROVES...MAPLEWOOD...BRENTWOOD...ST. LOUIS...RICHMOND HEIGHTS...
CLAYTON...UNIVERSITY CITY...HILLSDALE...NORTHWOODS...NORMANDY...
BEL-RIDGE...ST. JOHN...EAST CARONDELET...BROOKLYN AND UPLANDS PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.
TORRENTIAL RAINFALL IS EXPECTED TO OCCUR WITH THIS STORM...AND
MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS!
&&
LAT...LON 3852 9026 3842 9030 3841 9031 3841 9035
3846 9034 3846 9036 3872 9037 3872 9021
3870 9021 3866 9018 3866 9017 3843 9015
TIME...MOT...LOC 2257Z 173DEG 16KT 3851 9028
HAIL...0.75IN
WIND...60 MPH
$$
TES1 follow-up statement
947
WWUS53 KLSX 082324
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
624 PM CDT SUN JUL 8 2012
ILC163-MOC189-510-082334-
/O.CAN.KLSX.SV.W.0216.000000T0000Z-120708T2345Z/
ST. CLAIR IL-ST. LOUIS MO-ST. LOUIS CITY MO-
624 PM CDT SUN JUL 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR ST. LOUIS CITY...EAST CENTRAL
ST. LOUIS AND NORTHWESTERN ST. CLAIR COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
LAT...LON 3852 9026 3842 9030 3841 9031 3841 9035
3846 9034 3846 9036 3872 9037 3872 9021
3870 9021 3866 9018 3866 9017 3843 9015
TIME...MOT...LOC 2324Z 173DEG 16KT 3863 9030
$$
TESThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 7:03 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 42 min |
| Jul 7, 7:06 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 32 min |
| Jul 7, 7:10 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Saint Francois, Washington | 39 min |
| Jul 7, 7:18 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 27 min |
| Jul 7, 7:58 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 47 min |
| Jul 7, 8:49 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 26 min |
| Jul 8, 1:36 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 39 min |
| Jul 8, 2:10 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 28 min |
| Jul 8, 3:41 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Washington | 49 min |
| Jul 8, 3:53 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 37 min |
| Jul 8, 4:24 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 19 min |
| Jul 8, 6:49 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 41 min |
| Jul 7, 8:40 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 50 min |
| Jul 8, 2:29 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Marion | 46 min |
| Jul 8, 5:03 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 42 min |
| Jul 8, 5:42 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 48 min |
| Jul 8, 5:44 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 46 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2012Severe Thunderstorm Warnings in Illinois, 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.