Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 237, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 8, 2012, 9:31 PM CDT for Saint Charles County, Warren County, Missouri. It was in force for 44 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 8, 2012, 9:31 PM CDT (02:31 UTC)
- Expired
- Aug 8, 2012, 10:15 PM CDT
- In force
- 44 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Saint Charles County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 9 km from the middle of the area, began a volume at 02:30 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 9:36 PM CDT | TSTM WND GST 59 | 1 N New Melle, MO | HAIL RANGED IN SIZE FROM NICKELS TO QUARTERS |
| Aug 8, 9:36 PM CDT | HAIL 1 | 1 N New Melle, MO | HAIL RANGED IN SIZE FROM NICKELS TO QUARTERS |
| Aug 8, 9:45 PM CDT | HAIL 0.5 | Wentzville, MO | |
| Aug 8, 10:00 PM CDT | TSTM WND DMG | St. Peters, MO | TREE LIMB SIX INCHES IN DIAMETER AND 24 FEET IN LENGTH BLOWN DOWN. REPORT APPROX 1M WEST OF MID RIVERS MALL DRIVE AND I-70 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.5 hours before the alert went out and 232 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
- 296 J/kg
- Mixed-layer CIN
- -254 J/kg
- Mixed-layer LCL
- 1804 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
826
WUUS53 KLSX 090231
SVRLSX
MOC183-219-090315-
/O.NEW.KLSX.SV.W.0237.120809T0231Z-120809T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
931 PM CDT WED AUG 8 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
EAST CENTRAL WARREN COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 1015 PM CDT
* AT 930 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR NEW MELLE...
AND MOVING EAST AT 25 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
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...
WENTZVILLE...LAKE ST. LOUIS...DARDENNE PRAIRIE...O'FALLON...
COTTLEVILLE...WELDON SPRING...ST. PETERS...ST. CHARLES...NEW
MELLE...HARVESTER AND KAMPVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3883 9044 3881 9046 3876 9049 3873 9054
3870 9053 3868 9055 3868 9063 3869 9065
3863 9074 3865 9106 3883 9106 3886 9041
3883 9041
TIME...MOT...LOC 0232Z 270DEG 23KT 3874 9094
HAIL...1.00IN
WIND...60 MPH
$$
CARNEY2 follow-up statements
228
WWUS53 KLSX 090256
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
956 PM CDT WED AUG 8 2012
MOC183-219-090315-
/O.CON.KLSX.SV.W.0237.000000T0000Z-120809T0315Z/
ST. CHARLES MO-WARREN MO-
956 PM CDT WED AUG 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WARREN AND CENTRAL ST. CHARLES COUNTIES UNTIL 1015 PM CDT...
AT 950 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LAKE ST.
LOUIS...AND MOVING EAST AT 30 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...PUBLIC. AT 936 PM THE PUBLIC REPORTED OF 1 INCH HAIL AND
59 MPH WINDS NEAR NEW MELLE. ADDITIONALLY THERE HAVE BEEN
SEVERAL REPORTS OF PEA SIZED HAIL COVERING THE GROUND
IN THE WENTZVILLE AREA.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
COTTLEVILLE...WELDON SPRING...ST. PETERS...ST. CHARLES...HARVESTER
AND KAMPVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3883 9044 3881 9046 3876 9049 3873 9054
3870 9053 3868 9055 3868 9063 3869 9065
3863 9074 3865 9106 3883 9106 3886 9041
3883 9041
TIME...MOT...LOC 0255Z 268DEG 27KT 3879 9070
HAIL...1.00IN
WIND...60 MPH
$$
CARNEY650
WWUS53 KLSX 090310
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1010 PM CDT WED AUG 8 2012
MOC183-219-090320-
/O.EXP.KLSX.SV.W.0237.000000T0000Z-120809T0315Z/
ST. CHARLES MO-WARREN MO-
1010 PM CDT WED AUG 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WARREN AND
CENTRAL ST. CHARLES COUNTIES WILL EXPIRE AT 1015 PM CDT...
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...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THIS THUNDERSTORM.
LAT...LON 3883 9044 3881 9046 3876 9049 3873 9054
3870 9053 3868 9055 3868 9063 3869 9065
3863 9074 3865 9106 3883 9106 3886 9041
3883 9041
TIME...MOT...LOC 0310Z 268DEG 27KT 3879 9056
$$
CARNEYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:26 PM CDT | Severe Thunderstorm Warning | LSX | Cole | 34 min |
| Aug 8, 7:47 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 33 min |
| Aug 8, 10:51 PM CDT | Areal Flood Advisory | LSX | Saint Charles | 4 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.