Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 266, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 6, 2012, 3:13 PM CDT for Saint Francois County, Washington County, Missouri. It was in force for 27 min. 2 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 6, 2012, 3:13 PM CDT (20:13 UTC)
- Expired
- Sep 6, 2012, 3:40 PM CDT
- In force
- 27 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
The radar
The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 20:15 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 6, 3:13 PM CDT | HAIL 1.25 | 1 Ne Potosi, MO | HAIL NOW UP TO HALF DOLLAR SIZE AT INTERSECTION OF HIGHWAY 21 AND HIGHWAY E. |
| Sep 6, 3:27 PM CDT | HAIL 1 | Potosi, 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 |
|---|---|---|---|
| Sep 6, 12:28 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.2 hours before the alert went out and 299 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
- 2016 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 681 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
275
WUUS53 KLSX 062013
SVRLSX
MOC187-221-062100-
/O.NEW.KLSX.SV.W.0266.120906T2013Z-120906T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
313 PM CDT THU SEP 6 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
EAST CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 400 PM CDT
* AT 310 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR POTOSI...AND
MOVING EAST AT 10 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTER REPORTED QUARTER SIZED HAIL.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
MINERAL POINT...CADET AND BLACKWELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3790 9081 3804 9086 3808 9065 3807 9063
3805 9062 3803 9061 3802 9061 3801 9063
3801 9059 3796 9056 3787 9058
TIME...MOT...LOC 2013Z 261DEG 11KT 3797 9076
HAIL...1.00IN
WIND...<50 MPH
$$
TILLY2 follow-up statements
279
WWUS53 KLSX 062016
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
316 PM CDT THU SEP 6 2012
MOC187-221-062100-
/O.CON.KLSX.SV.W.0266.000000T0000Z-120906T2100Z/
ST. FRANCOIS MO-WASHINGTON MO-
316 PM CDT THU SEP 6 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WASHINGTON AND ST. FRANCOIS COUNTIES UNTIL 400 PM CDT...
AT 315 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MINERAL
POINT...AND MOVING EAST AT 15 MPH.
HAZARD...HALF DOLLAR SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTER REPORTED LARGE HAIL JUST NORTH EAST
OF POTOSI.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
CADET AND BLACKWELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3790 9081 3804 9086 3808 9065 3807 9063
3805 9062 3803 9061 3802 9061 3801 9063
3801 9059 3796 9056 3787 9058
TIME...MOT...LOC 2016Z 263DEG 14KT 3797 9073
HAIL...1.25IN
WIND...<50 MPH
$$
TILLY001
WWUS53 KLSX 062040
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
340 PM CDT THU SEP 6 2012
MOC187-221-062050-
/O.CAN.KLSX.SV.W.0266.000000T0000Z-120906T2100Z/
ST. FRANCOIS MO-WASHINGTON MO-
340 PM CDT THU SEP 6 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WASHINGTON AND
ST. FRANCOIS COUNTIES IS CANCELLED...
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 AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.
LAT...LON 3790 9081 3804 9086 3808 9065 3807 9063
3805 9062 3803 9061 3802 9061 3801 9063
3801 9059 3796 9056 3787 9058
TIME...MOT...LOC 2040Z 275DEG 20KT 3795 9065
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 1:44 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 46 min |
| Sep 6, 2:28 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 47 min |
| Sep 6, 2:31 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 44 min |
| Sep 6, 3:00 PM CDT | Flash Flood Warning | LSX | Crawford | 5 hr |
| Sep 6, 3:15 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade | 45 min |
| Sep 6, 3:31 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Washington | 44 min |
| Sep 6, 3:39 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 54 min |
| Sep 6, 3:58 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 47 min |
| Sep 6, 4:02 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, Warren, Washington | 43 min |
| Sep 6, 4:20 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 40 min |
| Sep 6, 4:38 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve, Saint Louis | 37 min |
| Sep 6, 5:18 PM CDT | Areal Flood Advisory | LSX | Madison, Saint Francois | 3 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.