Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 331, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 17, 2012, 4:24 PM CDT for 5 counties in Missouri. It was in force for 51 min. 5 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
- Oct 17, 2012, 4:24 PM CDT (21:24 UTC)
- Expired
- Oct 17, 2012, 5:15 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Crawford County, MO, Franklin County, MO, Saint Charles County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 73 km from the middle of the area, began a volume at 21:23 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 |
|---|---|---|---|
| Oct 17, 4:36 PM CDT | TSTM WND DMG | Sullivan, MO | WINDS ESTIMATED UP TO 50 MPH. |
| Oct 17, 4:44 PM CDT | TSTM WND DMG | Foristell, MO | TREES DOWN ON SOUTH SIDE OF I-70 NEAR FORISTELL. |
| Oct 17, 4:53 PM CDT | TSTM WND DMG | 1 Nne Wentzville, MO | GOAL POSTS AT PROGRESS PARK BLOWN OVER. |
| Oct 17, 4:53 PM CDT | TSTM WND DMG | 1 Wsw Wentzville, MO | SEVERAL POWER LINES BLOWN DOWN JUST SOUTH OF I-70 ON HEPPERMAN ROAD. |
| Oct 17, 4:55 PM CDT | TSTM WND DMG | Sullivan, MO | WINDS ESTIMATED UP TO 50 MPH. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 17, 1:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 9.4 hours before the alert went out and 268 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 745 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
985
WUUS53 KLSX 172124
SVRLSX
MOC055-071-183-219-221-172215-
/O.NEW.KLSX.SV.W.0331.121017T2124Z-121017T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
424 PM CDT WED OCT 17 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
WESTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
SOUTHEASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 515 PM CDT
* AT 419 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM JONESBURG TO GERALD TO 6 MILES EAST OF ST.
JAMES...AND MOVING EAST AT 50 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...
CUBA...STEELVILLE...BOURBON...WRIGHT CITY...SULLIVAN...
WASHINGTON...UNION...WENTZVILLE...ANTHONIES MILL...ST. CLAIR...
VILLA RIDGE...LAKE ST. LOUIS...BEAUFORT...LEASBURG...
MARTHASVILLE...DUTZOW...NEW MELLE...PARKWAY...AUGUSTA AND JAPAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3795 9153 3797 9153 3799 9145 3887 9102
3887 9073 3794 9098
TIME...MOT...LOC 2124Z 258DEG 42KT 3884 9118 3843 9129
3804 9144
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY3 follow-up statements
680
WWUS53 KLSX 172145
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
445 PM CDT WED OCT 17 2012
MOC055-071-183-219-221-172215-
/O.CON.KLSX.SV.W.0331.000000T0000Z-121017T2215Z/
CRAWFORD MO-FRANKLIN MO-ST. CHARLES MO-WARREN MO-WASHINGTON MO-
445 PM CDT WED OCT 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...SOUTHEASTERN WARREN...WESTERN ST. CHARLES...FRANKLIN AND
NORTHERN CRAWFORD COUNTIES UNTIL 515 PM CDT...
AT 441 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM MOSCOW MILLS TO UNION TO 6 MILES EAST OF
LEASBURG...AND MOVING EAST AT 50 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED POWER LINES DOWN ACROSS
WARREN COUNTY. THESE STORMS ALSO CAUSED DAMAGE IN BLAND AND
OWENSVILLE EARLIER THIS AFTERNOON.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
WENTZVILLE...ANTHONIES MILL...ST. CLAIR...VILLA RIDGE...LAKE ST.
LOUIS...ST. PAUL...NEW MELLE...PARKWAY...AUGUSTA...FLINT HILL...PINEY
PARK AND MOSELLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3794 9098 3795 9142 3799 9145 3887 9102
3887 9073
TIME...MOT...LOC 2144Z 258DEG 42KT 3889 9088 3848 9100
3809 9115
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY304
WWUS53 KLSX 172203
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
503 PM CDT WED OCT 17 2012
MOC219-172212-
/O.CAN.KLSX.SV.W.0331.000000T0000Z-121017T2215Z/
WARREN MO-
503 PM CDT WED OCT 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARREN COUNTY IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 3796 9128 3825 9109 3851 9097 3887 9096
3887 9073 3794 9098
TIME...MOT...LOC 2202Z 258DEG 42KT 3893 9061 3852 9074
3813 9089
$$
MOC055-071-183-221-172215-
/O.CON.KLSX.SV.W.0331.000000T0000Z-121017T2215Z/
CRAWFORD MO-FRANKLIN MO-ST. CHARLES MO-WASHINGTON MO-
503 PM CDT WED OCT 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...WESTERN ST. CHARLES...EASTERN FRANKLIN AND NORTHEASTERN
CRAWFORD COUNTIES UNTIL 515 PM CDT...
AT 458 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 6 MILES NORTHEAST OF ST. PAUL TO GRAY SUMMIT TO 7
MILES SOUTHWEST OF RICHWOODS...AND MOVING EAST AT 50 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED DAMAGE WHEN THESE STORMS
MOVED THROUGH FORISTELL...BLAND...OWENSVILLE...AND WARREN
COUNTY.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3796 9128 3825 9109 3851 9097 3887 9096
3887 9073 3794 9098
TIME...MOT...LOC 2202Z 258DEG 42KT 3893 9061 3852 9074
3813 9089
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY540
WWUS53 KLSX 172212
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
512 PM CDT WED OCT 17 2012
MOC055-071-183-221-172222-
/O.EXP.KLSX.SV.W.0331.000000T0000Z-121017T2215Z/
CRAWFORD MO-FRANKLIN MO-ST. CHARLES MO-WASHINGTON MO-
512 PM CDT WED OCT 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHINGTON...
WESTERN ST. CHARLES...EASTERN FRANKLIN AND NORTHEASTERN CRAWFORD
COUNTIES WILL EXPIRE AT 515 PM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA. ANOTHER WARNING HAS BEEN ISSUED TO THE EAST OF THIS
WARNING.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM.
LAT...LON 3796 9128 3825 9109 3851 9097 3887 9096
3887 9073 3794 9098
TIME...MOT...LOC 2212Z 258DEG 42KT 3895 9046 3854 9059
3815 9074
$$
MILLERThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 17, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Montgomery, Osage, Warren | 42 min |
| Oct 17, 4:54 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis and 1 more | 51 min |
| Oct 17, 4:58 PM CDT | Tornado Warning | LSX | Lincoln, Saint Charles | 32 min |
| Oct 17, 5:06 PM CDT | Tornado Warning | LSX | Saint Charles | 24 min |
| Oct 17, 5:23 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Charles, Sainte Genevieve, Saint Francois, Saint Louis, City of Saint Louis | 52 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.