Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 201, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 2012, 7:06 PM CDT for Monroe County, Illinois; Jefferson County, Missouri. It was in force for 32 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
- Jul 7, 2012, 7:06 PM CDT (00:06 UTC)
- Expired
- Jul 7, 2012, 7:38 PM CDT
- In force
- 32 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Monroe County, IL, Jefferson County, MO
The radar
The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 00:08 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.1 hours before the alert went out and 260 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
- 199 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 2803 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
181
WUUS53 KLSX 080006
SVRLSX
ILC133-MOC099-080045-
/O.NEW.KLSX.SV.W.0201.120708T0006Z-120708T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
706 PM CDT SAT JUL 7 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN MONROE COUNTY IN SOUTHWEST ILLINOIS...
EAST CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 745 PM CDT
* AT 704 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHEAST
OF CRYSTAL CITY...AND MOVING NORTH AT 5 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...
CRYSTAL CITY...HERCULANEUM...FESTUS...PEVELY...BARNHART...
VALMEYER...FOUNTAIN...CHALFIN BRIDGE...MAEYSTOWN...MONROE CITY...
HARRISONVILLE...MADONNAVILLE AND FOSTER POND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3832 9052 3838 9026 3816 9016 3810 9035
TIME...MOT...LOC 0007Z 158DEG 6KT 3818 9028
HAIL...1.00IN
WIND...60 MPH
$$
KANOFSKY1 follow-up statement
844 WWUS53 KLSX 080038 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 738 PM CDT SAT JUL 7 2012 ILC133-MOC099-080048- /O.CAN.KLSX.SV.W.0201.000000T0000Z-120708T0045Z/ MONROE IL-JEFFERSON MO- 738 PM CDT SAT JUL 7 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL JEFFERSON AND WESTERN MONROE COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 3832 9052 3838 9026 3816 9016 3810 9035 TIME...MOT...LOC 0038Z 158DEG 6KT 3823 9030 $$ KANOFSKY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 7:58 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 47 min |
| Jul 7, 8:40 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 50 min |
| Jul 8, 2:29 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Marion | 46 min |
| Jul 8, 5:03 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 42 min |
| Jul 8, 5:42 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 48 min |
| Jul 8, 5:44 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 46 min |
| Jul 8, 5:57 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 27 min |
| Jul 8, 6:49 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 41 min |
| Jul 7, 7:03 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 42 min |
| Jul 7, 7:10 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Saint Francois, Washington | 39 min |
| Jul 7, 7:18 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 27 min |
| Jul 7, 8:49 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 26 min |
| Jul 8, 1:36 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 39 min |
| Jul 8, 2:10 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 28 min |
| Jul 8, 3:41 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Washington | 49 min |
| Jul 8, 3:53 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 37 min |
| Jul 8, 4:24 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 19 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Severe 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.