Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 9, 2011, 5:41 AM CDT for Bond County, Madison County, Illinois. It was in force for 49 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
- Apr 9, 2011, 5:41 AM CDT (10:41 UTC)
- Expired
- Apr 9, 2011, 6:30 AM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Bond County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 10:44 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, 10.7 hours before the alert went out and 171 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 637 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 242 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
533 WUUS53 KLSX 091041 SVRLSX ILC005-119-091130- /O.NEW.KLSX.SV.W.0037.110409T1041Z-110409T1130Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 541 AM CDT SAT APR 9 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS... EASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS... * UNTIL 630 AM CDT * AT 540 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR TROY...AND MOVING EAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... MARINE...ALHAMBRA...POCAHONTAS...FRUIT...HAMEL...KAUFMAN... GRANTFORK...PIERRON...SHILOH HILL AND OLD RIPLEY. 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 3900 8955 3878 8941 3870 8997 3885 8998 TIME...MOT...LOC 1041Z 248DEG 31KT 3878 8987 WIND...HAIL <50MPH 1.00IN $$ TES
2 follow-up statements
418 WWUS53 KLSX 091104 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 604 AM CDT SAT APR 9 2011 ILC005-119-091130- /O.CON.KLSX.SV.W.0037.000000T0000Z-110409T1130Z/ MADISON IL-BOND IL- 604 AM CDT SAT APR 9 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN BOND AND EASTERN MADISON COUNTIES UNTIL 630 AM CDT... AT 603 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR POCAHONTAS...OR 9 MILES WEST OF GREENVILLE... MOVING NORTHEAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL BOND COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3900 8955 3878 8941 3870 8997 3885 8998 TIME...MOT...LOC 1104Z 246DEG 42KT 3890 8955 WIND...HAIL <50MPH 1.00IN $$ TES
921 WWUS53 KLSX 091129 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 629 AM CDT SAT APR 9 2011 ILC005-119-091139- /O.EXP.KLSX.SV.W.0037.000000T0000Z-110409T1130Z/ MADISON IL-BOND IL- 629 AM CDT SAT APR 9 2011 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BOND AND EASTERN MADISON COUNTIES WILL EXPIRE AT 630 AM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 3900 8955 3878 8941 3870 8997 3885 8998 TIME...MOT...LOC 1129Z 246DEG 42KT 3902 8921 $$ TES
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:46 AM CDT | Flash Flood Warning | LSX | Adams | 6 hr |
| Apr 9, 3:00 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 33 min |
| Apr 9, 3:44 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Pike | 31 min |
| Apr 9, 4:19 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 26 min |
| Apr 9, 5:08 AM CDT | Severe Thunderstorm Warning | LSX | Jersey, Madison | 22 min |
| Apr 9, 5:21 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 39 min |
| Apr 9, 5:25 AM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 35 min |
| Apr 9, 5:44 AM CDT | Areal Flood Advisory | LSX | Calhoun, Jersey, Macoupin, Madison | 3 hr |
| Apr 9, 6:43 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 32 min |
| Apr 9, 10:42 AM CDT | River Flood Warning | LSX | Adams | 32 days |
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.