Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 326, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 25, 2012, 7:41 PM CDT for Franklin County, Jefferson County, Saint Louis County, Missouri. It was in force for 49 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
- Sep 25, 2012, 7:41 PM CDT (00:41 UTC)
- Expired
- Sep 25, 2012, 8:30 PM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, MO, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 39 km from the middle of the area, began a volume at 00:41 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 25, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 258 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
- 1015 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
381
WUUS53 KLSX 260041
SVRLSX
MOC071-099-189-260130-
/O.NEW.KLSX.SV.W.0326.120926T0041Z-120926T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
741 PM CDT TUE SEP 25 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 830 PM CDT
* AT 736 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTH OF
LONEDELL...AND MOVING EAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. AN AMATEUR RADIO OPERATOR HAS
ESTIMATED 60 MPH WINDS WITH THIS STORM IN ROBERTSVILLE.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
* LOCATIONS IMPACTED INCLUDE...
PACIFIC...EUREKA...CEDAR HILL...BYRNES MILL...HIGH RIDGE...
MURPHY...ANTONIA...BARNHART...PEVELY...HERCULANEUM...ARNOLD...
OAKVILLE...MEHLVILLE...LEMAY...DITTMER...HOUSE SPRINGS...
GRUBVILLE...OERMANN...MORSE MILL AND SCOTSDALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3829 9086 3850 9083 3853 9026 3841 9031
3839 9034 3833 9037 3825 9037
TIME...MOT...LOC 0039Z 270DEG 34KT 3839 9079
HAIL...1.00IN
WIND...60 MPH
$$
BRITT3 follow-up statements
690
WWUS53 KLSX 260055
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
755 PM CDT TUE SEP 25 2012
MOC071-099-189-260130-
/O.CON.KLSX.SV.W.0326.000000T0000Z-120926T0130Z/
FRANKLIN MO-JEFFERSON MO-ST. LOUIS MO-
755 PM CDT TUE SEP 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ST.
LOUIS...NORTHERN JEFFERSON AND EAST CENTRAL FRANKLIN COUNTIES UNTIL
830 PM CDT...
AT 754 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CEDAR HILL...
AND MOVING EAST AT 35 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
BYRNES MILL...HIGH RIDGE...MURPHY...ANTONIA...BARNHART...PEVELY...
HERCULANEUM...ARNOLD...OAKVILLE...MEHLVILLE...HOUSE SPRINGS...
SCOTSDALE...PARKDALE...OTTO AND KIMMSWICK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3829 9086 3850 9083 3853 9026 3841 9031
3839 9034 3833 9037 3825 9037
TIME...MOT...LOC 0055Z 268DEG 29KT 3840 9065
HAIL...1.00IN
WIND...60 MPH
$$
BRITT536
WWUS53 KLSX 260104
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
804 PM CDT TUE SEP 25 2012
MOC071-260113-
/O.CAN.KLSX.SV.W.0326.000000T0000Z-120926T0130Z/
FRANKLIN MO-
804 PM CDT TUE SEP 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FRANKLIN COUNTY
IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT.
LAT...LON 3828 9073 3851 9067 3853 9026 3841 9031
3839 9034 3833 9037 3825 9037
TIME...MOT...LOC 0103Z 268DEG 29KT 3840 9057
$$
MOC099-189-260130-
/O.CON.KLSX.SV.W.0326.000000T0000Z-120926T0130Z/
JEFFERSON MO-ST. LOUIS MO-
804 PM CDT TUE SEP 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ST.
LOUIS AND NORTHERN JEFFERSON COUNTIES UNTIL 830 PM CDT...
AT 759 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HOUSE
SPRINGS...AND MOVING EAST AT 35 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
HIGH RIDGE...MURPHY...ANTONIA...BARNHART...PEVELY...HERCULANEUM...
ARNOLD...OAKVILLE...MEHLVILLE...PARKDALE...OTTO AND KIMMSWICK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3828 9073 3851 9067 3853 9026 3841 9031
3839 9034 3833 9037 3825 9037
TIME...MOT...LOC 0103Z 268DEG 29KT 3840 9057
HAIL...1.00IN
WIND...60 MPH
$$
BRITT770
WWUS53 KLSX 260124
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
824 PM CDT TUE SEP 25 2012
MOC099-189-260133-
/O.EXP.KLSX.SV.W.0326.000000T0000Z-120926T0130Z/
JEFFERSON MO-ST. LOUIS MO-
824 PM CDT TUE SEP 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ST. LOUIS AND
NORTHERN JEFFERSON COUNTIES WILL EXPIRE AT 830 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT.
LAT...LON 3828 9073 3851 9067 3853 9026 3841 9031
3839 9034 3833 9037 3825 9037
TIME...MOT...LOC 0123Z 268DEG 29KT 3841 9036
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 7:05 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 40 min |
| Sep 25, 8:13 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 47 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.