Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 307, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 25, 2012, 4:31 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
- Sep 25, 2012, 4:31 PM CDT (21:31 UTC)
- Expired
- Sep 25, 2012, 5:15 PM CDT
- In force
- 44 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Saint Charles County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 5 km from the middle of the area, began a volume at 21:31 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 |
|---|---|---|---|
| Sep 25, 4:51 PM CDT | HAIL 0.5 | Lake St. Louis, MO | |
| Sep 25, 4:55 PM CDT | HAIL 0.7 | O'Fallon, MO | |
| Sep 25, 4:57 PM CDT | HAIL 0.7 | O'Fallon, MO | AT I-70 AND TR HUGHES BLVD...UP TO DIME SIZE HAIL WITH ALMOST NO WIND. |
| Sep 25, 5:02 PM CDT | HAIL 0.25 | St. Peters, MO | AT MID RIVERS MALL DRIVE AND WILLOTT ROAD...PEA SIZE HAIL. |
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 12:00Z, 9.5 hours before the alert went out and 243 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
- 221 J/kg
- Mixed-layer CIN
- -192 J/kg
- Mixed-layer LCL
- 560 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
230
WUUS53 KLSX 252131
SVRLSX
MOC183-219-252215-
/O.NEW.KLSX.SV.W.0307.120925T2131Z-120925T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
431 PM CDT TUE SEP 25 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 515 PM CDT
* AT 426 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
MARTHASVILLE...AND MOVING EAST AT 40 MPH.
HAZARD...HALF DOLLAR 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...
LAKE ST. LOUIS...DARDENNE PRAIRIE...O'FALLON...WELDON SPRING...
COTTLEVILLE...ST. PETERS AND NEW MELLE.
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.
&&
LAT...LON 3886 9057 3868 9058 3868 9063 3869 9065
3868 9068 3867 9068 3866 9069 3865 9113
3872 9114
TIME...MOT...LOC 2131Z 263DEG 34KT 3868 9103
HAIL...1.25IN
WIND...60 MPH
$$
TES2 follow-up statements
257
WWUS53 KLSX 252148
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
448 PM CDT TUE SEP 25 2012
MOC219-252158-
/O.CAN.KLSX.SV.W.0307.000000T0000Z-120925T2215Z/
WARREN MO-
448 PM CDT TUE SEP 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WARREN COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3868 9058 3868 9063 3869 9065 3868 9068
3866 9069 3866 9093 3877 9095 3886 9057
TIME...MOT...LOC 2148Z 263DEG 34KT 3870 9083
$$
MOC183-252215-
/O.CON.KLSX.SV.W.0307.000000T0000Z-120925T2215Z/
ST. CHARLES MO-
448 PM CDT TUE SEP 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL ST.
CHARLES COUNTY UNTIL 515 PM CDT...
AT 445 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR NEW MELLE...
AND MOVING EAST AT 40 MPH.
HAZARD...HALF DOLLAR 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...
LAKE ST. LOUIS...DARDENNE PRAIRIE...O'FALLON...WELDON SPRING...
COTTLEVILLE...ST. PETERS AND HARVESTER.
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.
&&
LAT...LON 3868 9058 3868 9063 3869 9065 3868 9068
3866 9069 3866 9093 3877 9095 3886 9057
TIME...MOT...LOC 2148Z 263DEG 34KT 3870 9083
HAIL...1.25IN
WIND...60 MPH
$$
TES032
WWUS53 KLSX 252203
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
503 PM CDT TUE SEP 25 2012
MOC183-252215-
/O.CON.KLSX.SV.W.0307.000000T0000Z-120925T2215Z/
ST. CHARLES MO-
503 PM CDT TUE SEP 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL ST.
CHARLES COUNTY UNTIL 515 PM CDT...
AT 459 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DARDENNE
PRAIRIE...AND MOVING EAST AT 35 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS. SPOTTERS REPORTED QUARTER SIZE
HAIL IN WENTZVILLE WITH THIS STORM.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
COTTLEVILLE...WELDON SPRING...ST. PETERS AND HARVESTER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.
&&
LAT...LON 3868 9058 3868 9063 3869 9065 3868 9068
3866 9069 3866 9093 3877 9095 3886 9057
TIME...MOT...LOC 2202Z 264DEG 29KT 3873 9070
HAIL...1.00IN
WIND...<50 MPH
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 51 min |
| Sep 25, 5:48 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis, City of Saint Louis | 42 min |
| Sep 25, 6:16 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 44 min |
| Sep 25, 6:22 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis, City of Saint Louis | 38 min |
| Sep 25, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 45 min |
| Sep 25, 6:55 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.