Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 76, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 23, 2012, 4:42 AM CDT for Saint Francois County, Washington County, Missouri. It was in force for 33 min. 1 report 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
- Mar 23, 2012, 4:42 AM CDT (09:42 UTC)
- Expired
- Mar 23, 2012, 5:15 AM CDT
- In force
- 33 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), 86 km from the middle of the area, began a volume at 09:42 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 |
|---|---|---|---|
| Mar 23, 5:01 AM CDT | HAIL 0.25 | Potosi, MO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 9.7 hours before the alert went out and 300 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
- 8 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 960 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
666
WUUS53 KLSX 230942
SVRLSX
MOC187-221-231015-
/O.NEW.KLSX.SV.W.0076.120323T0942Z-120323T1015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
442 AM CDT FRI MAR 23 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
SOUTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 515 AM CDT
* AT 438 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR BISMARCK...AND MOVING NORTH AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
LEADWOOD...POTOSI...IRONDALE...MINERAL POINT...OLD MINES...
FRANKCLAY AND CADET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3773 9073 3774 9077 3801 9083 3806 9067
3803 9062 3802 9061 3801 9063 3800 9058
3801 9056 3800 9055 3773 9056
TIME...MOT...LOC 0942Z 181DEG 36KT 3779 9067
WIND...HAIL <50MPH 1.00IN
$$
TILLY2 follow-up statements
025
WWUS53 KLSX 230957
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
457 AM CDT FRI MAR 23 2012
MOC187-221-231015-
/O.CON.KLSX.SV.W.0076.000000T0000Z-120323T1015Z/
ST. FRANCOIS MO-WASHINGTON MO-
457 AM CDT FRI MAR 23 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WASHINGTON AND ST. FRANCOIS COUNTIES UNTIL 515 AM CDT...
AT 455 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR IRONDALE...OR NEAR LEADWOOD...MOVING NORTH AT
35 MPH.
LOCATIONS IMPACTED INCLUDE...
POTOSI...MINERAL POINT...OLD MINES AND CADET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3786 9076 3801 9083 3806 9067 3802 9061
3801 9063 3800 9058 3801 9056 3800 9055
3780 9056
TIME...MOT...LOC 0957Z 180DEG 32KT 3790 9065
WIND...HAIL <50MPH 1.00IN
$$
TILLY730
WWUS53 KLSX 231011
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
511 AM CDT FRI MAR 23 2012
MOC187-221-231022-
/O.EXP.KLSX.SV.W.0076.000000T0000Z-120323T1015Z/
ST. FRANCOIS MO-WASHINGTON MO-
511 AM CDT FRI MAR 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WASHINGTON AND
ST. FRANCOIS COUNTIES WILL EXPIRE AT 515 AM CDT...
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 IS STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3786 9076 3801 9083 3806 9067 3802 9061
3801 9063 3800 9058 3801 9056 3800 9055
3780 9056
TIME...MOT...LOC 1012Z 181DEG 30KT 3803 9064
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 4:14 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 31 min |
| Mar 23, 4:30 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 30 min |
| Mar 23, 5:01 PM CDT | Areal Flood Advisory | LSX | Lewis | 4 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.