Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 197, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 2012, 6:19 PM CDT for Jefferson County, Saint Francois County, Washington County, Missouri. It was in force for 41 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
- Jul 7, 2012, 6:19 PM CDT (23:19 UTC)
- Expired
- Jul 7, 2012, 7:00 PM CDT
- In force
- 41 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Jefferson County, MO, Saint Francois County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 89 km from the middle of the area, began a volume at 23:21 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 |
|---|---|---|---|
| Jul 7, 6:25 PM CDT | TSTM WND DMG | Park Hills, MO | POWER LINES DOWNED ON ROUTE 221 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.3 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
- 2666 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
946
WUUS53 KLSX 072319
SVRLSX
MOC099-187-221-080000-
/O.NEW.KLSX.SV.W.0197.120707T2319Z-120708T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
619 PM CDT SAT JUL 7 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
EAST CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 700 PM CDT
* AT 617 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PARK
HILLS...AND MOVING NORTHWEST AT 15 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...
DESLOGE...LEADWOOD...BONNE TERRE...PARK HILLS...IRONDALE...
FRANKCLAY...CADET...BLACKWELL AND VALLES MILL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3784 9072 3807 9072 3809 9045 3797 9045
3788 9046 3781 9039 3778 9045
TIME...MOT...LOC 2320Z 145DEG 11KT 3781 9052
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY2 follow-up statements
928
WWUS53 KLSX 072324
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
624 PM CDT SAT JUL 7 2012
MOC099-187-221-080000-
/O.CON.KLSX.SV.W.0197.000000T0000Z-120708T0000Z/
JEFFERSON MO-ST. FRANCOIS MO-WASHINGTON MO-
624 PM CDT SAT JUL 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WASHINGTON...ST. FRANCOIS AND SOUTH CENTRAL JEFFERSON COUNTIES UNTIL
700 PM CDT...
AT 621 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PARK HILLS...
AND MOVING NORTHWEST AT 15 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED ONE INCH HAIL IN PARK
HILLS.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
DESLOGE...LEADWOOD...BONNE TERRE...PARK HILLS...IRONDALE...
FRANKCLAY...CADET...BLACKWELL AND VALLES MILL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3784 9072 3807 9072 3809 9045 3797 9045
3788 9046 3781 9039 3778 9045
TIME...MOT...LOC 2323Z 145DEG 11KT 3782 9053
HAIL...1.00IN
WIND...60 MPH
$$
KANOFSKY994
WWUS53 KLSX 072353
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
653 PM CDT SAT JUL 7 2012
MOC099-187-221-080003-
/O.EXP.KLSX.SV.W.0197.000000T0000Z-120708T0000Z/
JEFFERSON MO-ST. FRANCOIS MO-WASHINGTON MO-
653 PM CDT SAT JUL 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WASHINGTON...ST.
FRANCOIS AND SOUTH CENTRAL JEFFERSON COUNTIES WILL EXPIRE AT 700 PM
CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3784 9072 3807 9072 3809 9045 3797 9045
3788 9046 3781 9039 3778 9045
TIME...MOT...LOC 2353Z 145DEG 11KT 3790 9060
$$
KANOFSKYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:01 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 13 min |
| Jul 7, 5:29 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 29 min |
| Jul 7, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 41 min |
| Jul 7, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 33 min |
| Jul 7, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 44 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.