Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 229, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 4, 2012, 9:20 PM CDT for 5 counties in Missouri. It was in force for 40 min. 7 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 4, 2012, 9:20 PM CDT (02:20 UTC)
- Expired
- Aug 4, 2012, 10:00 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 70.0 mph
Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 71 km from the middle of the area, began a volume at 02:21 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 4, 9:36 PM CDT | HAIL 0.88 | 4 Nnw Gerald, MO | |
| Aug 4, 9:38 PM CDT | TSTM WND GST 50 | New Haven, MO | |
| Aug 4, 9:38 PM CDT | TSTM WND GST 70 | 4 Wnw Lyon, MO | 60 TO 70 MPH WIND GUST ABOUT 4 MILES SOUTH OF NEW HAVEN. |
| Aug 4, 9:47 PM CDT | TSTM WND DMG | Washington, MO | *** 2 INJ *** TREES AND POWER LINES BLOWN DOWN AROUND TOWN. TWO PEOPLE SUSTAINED MINOR INJURIES FROM FLYING DEBRIS IN THE PARKING LOT AT THE WASHINGTON TOWN AND COUNTRY FAIR. ALSO...SEVERAL TENTS WERE BLOWN DOWN...FORTUNATELY FAIR GROUNDS HAD BEEN EVACUATED. |
| Aug 4, 9:47 PM CDT | TSTM WND GST 49 | 7 Ese New Haven, MO | |
| Aug 4, 9:50 PM CDT | TSTM WND DMG | 2 E Washington, MO | ONE AND ONE HALF FOOT DIAMETER TREE UPROOTED |
| Aug 4, 9:51 PM CDT | TSTM WND GST 50 | 1 N Union, MO |
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 |
|---|---|---|---|
| Aug 4, 6:12 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 273 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
- 1173 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 2913 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
299
WUUS53 KLSX 050220
SVRLSX
MOC055-071-073-219-221-050300-
/O.NEW.KLSX.SV.W.0229.120805T0220Z-120805T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
920 PM CDT SAT AUG 4 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...
GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
SOUTHERN WARREN COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 1000 PM CDT
* AT 917 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 6 MILES WEST OF HERMANN TO 7 MILES SOUTHEAST OF
BLAND...AND MOVING EAST AT 25 MPH.
HAZARD...PING PONG BALL SIZE HAIL AND 70 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. TREE BRANCHES UP
TO THREE INCHES IN DIAMETER BROKEN. POSSIBLE MINOR DAMAGE
TO SHINGLE ROOFS AND METAL OUTBUILDINGS.
* LOCATIONS IMPACTED INCLUDE...
OWENSVILLE...HERMANN...BOURBON...NEW HAVEN...SULLIVAN...
WASHINGTON...UNION...ST. CLAIR...DRAKE...ROSEBUD...GERALD...
TRELOAR...BEAUFORT...MARTHASVILLE...DUTZOW...PARKWAY...BAY...
SWISS...OAK HILL AND BERGER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
&&
LAT...LON 3866 9165 3866 9164 3870 9164 3867 9155
3871 9149 3871 9142 3876 9142 3876 9096
3814 9097 3813 9153 3815 9154 3816 9165
TIME...MOT...LOC 0220Z 269DEG 23KT 3867 9151 3822 9153
HAIL...1.50IN
WIND...70 MPH
$$
TRUETT3 follow-up statements
524
WWUS53 KLSX 050232
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
932 PM CDT SAT AUG 4 2012
MOC055-071-073-219-221-050300-
/O.CON.KLSX.SV.W.0229.000000T0000Z-120805T0300Z/
CRAWFORD MO-FRANKLIN MO-GASCONADE MO-WARREN MO-WASHINGTON MO-
932 PM CDT SAT AUG 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...SOUTHERN WARREN...GASCONADE...FRANKLIN AND NORTHERN
CRAWFORD COUNTIES UNTIL 1000 PM CDT...
AT 930 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM HERMANN TO 9 MILES SOUTH OF OWENSVILLE...AND
MOVING EAST AT 25 MPH.
HAZARD...PING PONG BALL SIZE HAIL AND 70 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. TREE BRANCHES UP TO
THREE INCHES IN DIAMETER BROKEN. POSSIBLE MINOR DAMAGE TO
SHINGLE ROOFS AND METAL OUTBUILDINGS.
LOCATIONS IMPACTED INCLUDE...
BOURBON...NEW HAVEN...SULLIVAN...WASHINGTON...UNION...ST. CLAIR...
ROSEBUD...GERALD...TRELOAR...BEAUFORT...MARTHASVILLE...DUTZOW...
PARKWAY...BERGER...JAPAN...LESLIE...ST. CLOUD...NOSER MILL...HOLSTEIN
AND LYON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
&&
LAT...LON 3868 9154 3871 9149 3871 9142 3876 9142
3876 9096 3814 9097 3813 9153 3815 9154
TIME...MOT...LOC 0232Z 269DEG 23KT 3867 9141 3822 9143
HAIL...1.50IN
WIND...70 MPH
$$
TRUETT526
WWUS53 KLSX 050247
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
947 PM CDT SAT AUG 4 2012
MOC073-050255-
/O.CAN.KLSX.SV.W.0229.000000T0000Z-120805T0300Z/
GASCONADE MO-
947 PM CDT SAT AUG 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR GASCONADE COUNTY IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 3821 9137 3823 9136 3870 9137 3871 9142
3876 9142 3876 9096 3814 9097 3813 9153
3821 9153
TIME...MOT...LOC 0245Z 269DEG 23KT 3867 9130 3822 9132
$$
MOC055-071-219-221-050300-
/O.CON.KLSX.SV.W.0229.000000T0000Z-120805T0300Z/
CRAWFORD MO-FRANKLIN MO-WARREN MO-WASHINGTON MO-
947 PM CDT SAT AUG 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...SOUTHERN WARREN...FRANKLIN AND NORTHERN CRAWFORD
COUNTIES UNTIL 1000 PM CDT...
AT 942 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 6 MILES EAST OF HERMANN TO 7 MILES NORTHWEST OF
BOURBON...AND MOVING EAST AT 25 MPH.
HAZARD...QUARTER SIZE HAIL AND 70 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. TREE BRANCHES
UP TO THREE INCHES IN DIAMETER BROKEN. POSSIBLE MINOR DAMAGE
TO SHINGLE ROOFS AND METAL OUTBUILDINGS. THOSE WITH
PROPERTY AT THE WASHINGTON TOWN AND COUNTRY FAIR SHOULD
IMMEDIATELY PREPARE FOR WINDS OF UP TO 70 MPH.
LOCATIONS IMPACTED INCLUDE...
BOURBON...NEW HAVEN...SULLIVAN...WASHINGTON...UNION...ST. CLAIR...
TRELOAR...BEAUFORT...MARTHASVILLE...DUTZOW...PARKWAY...JAPAN...
LESLIE...ST. CLOUD...NOSER MILL...HOLSTEIN...LYON AND STANTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
&&
LAT...LON 3821 9137 3823 9136 3870 9137 3871 9142
3876 9142 3876 9096 3814 9097 3813 9153
3821 9153
TIME...MOT...LOC 0245Z 269DEG 23KT 3867 9130 3822 9132
HAIL...1.00IN
WIND...70 MPH
$$
TRUETT467
WWUS53 KLSX 050302
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1002 PM CDT SAT AUG 4 2012
MOC055-071-219-221-050310-
/O.EXP.KLSX.SV.W.0229.000000T0000Z-120805T0300Z/
CRAWFORD MO-FRANKLIN MO-WARREN MO-WASHINGTON MO-
1002 PM CDT SAT AUG 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN
WASHINGTON...SOUTHWEST WARREN...WESTERN FRANKLIN AND NORTHERN
CRAWFORD COUNTIES HAS EXPIRED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA. HOWEVER...A SEVERE THUNDERSTORM WARNING DOES REMAIN IN
EFFECT FOR SOUTHEAST WARREN AND EASTERN FRANKLIN COUNTIES UNTIL 1045
PM.
LAT...LON 3821 9137 3823 9136 3870 9137 3871 9142
3876 9142 3876 9096 3814 9097 3813 9153
3821 9153
TIME...MOT...LOC 0247Z 269DEG 23KT 3867 9128 3822 9130
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 8:30 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Gasconade, Montgomery, Osage | 45 min |
| Aug 4, 8:47 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade, Osage | 43 min |
| Aug 4, 9:07 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade, Montgomery, Osage, Warren | 23 min |
| Aug 4, 9:38 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, Warren, Washington | 67 min |
| Aug 4, 10:22 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Charles, Saint Louis, City of Saint Louis | 38 min |
| Aug 4, 10:59 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve | 46 min |
| Aug 4, 11:46 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 33 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.