Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 482, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 7, 2011, 12:56 PM CDT for Randolph County, Illinois. It was in force for 34 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
- Aug 7, 2011, 12:56 PM CDT (17:56 UTC)
- Expired
- Aug 7, 2011, 1:30 PM CDT
- In force
- 34 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Randolph County, IL
The radar
The St Louis radar (KLSX), 96 km from the middle of the area, began a volume at 17:56 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 12:00Z, 5.9 hours before the alert went out and 258 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
- 842 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1102 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
699
WUUS53 KLSX 071756
SVRLSX
ILC157-071845-
/O.NEW.KLSX.SV.W.0482.110807T1756Z-110807T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1256 PM CDT SUN AUG 7 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 145 PM CDT
* AT 1252 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
EVANSVILLE...OR 8 MILES SOUTH OF RED BUD...AND MOVING EAST AT 35
MPH.
* LOCATIONS IMPACTED INCLUDE...
SPARTA...EVANSVILLE...BALDWIN...BREMEN...TILDEN...STEELEVILLE...
COULTERVILLE...PERCY...ELLIS GROVE...PRESTON...WALSH...NEW
PALESTINE...HOUSTON...BLAIR...WELGE AND EDEN.
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 3791 8963 3801 9006 3802 9006 3802 9009
3813 9006 3814 9003 3816 9004 3821 9004
3822 8959
TIME...MOT...LOC 1756Z 280DEG 28KT 3809 8996
WIND...HAIL 60MPH 1.00IN
$$
GLASS2 follow-up statements
700 WWUS53 KLSX 071815 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 115 PM CDT SUN AUG 7 2011 ILC157-071845- /O.CON.KLSX.SV.W.0482.000000T0000Z-110807T1845Z/ RANDOLPH IL- 115 PM CDT SUN AUG 7 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN RANDOLPH COUNTY UNTIL 145 PM CDT... AT 112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTH OF BREMEN...OR 7 MILES SOUTHWEST OF SPARTA...MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... SPARTA...BREMEN...STEELEVILLE...BLAIR...WELGE AND EDEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 3799 8994 3818 8989 3817 8960 3791 8963 TIME...MOT...LOC 1815Z 281DEG 30KT 3806 8975 WIND...HAIL 60MPH 1.00IN $$ CARNEY
967 WWUS53 KLSX 071830 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 130 PM CDT SUN AUG 7 2011 ILC157-071840- /O.CAN.KLSX.SV.W.0482.000000T0000Z-110807T1845Z/ RANDOLPH IL- 130 PM CDT SUN AUG 7 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RANDOLPH COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER POSES AN IMMEDIATE THREAT OF SEVERE WEATHER. LAT...LON 3799 8994 3818 8989 3817 8960 3791 8963 TIME...MOT...LOC 1830Z 280DEG 28KT 3804 8963 $$ CARNEY
Nearby
Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
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.