Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 35, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 9, 2011, 5:21 AM CDT for Fayette County, Montgomery County, Illinois. It was in force for 39 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, 5:21 AM CDT (10:21 UTC)
- Expired
- Apr 9, 2011, 6:00 AM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Fayette County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 108 km from the middle of the area, began a volume at 10:23 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, 10.4 hours before the alert went out and 115 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.
954
WUUS53 KLSX 091021
SVRLSX
ILC051-135-091100-
/O.NEW.KLSX.SV.W.0035.110409T1021Z-110409T1100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
521 AM CDT SAT APR 9 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
EAST CENTRAL MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 600 AM CDT
* AT 516 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR COFFEEN...OR 5 MILES EAST OF HILLSBORO...AND
MOVING EAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
WITT...RAMSEY...FILLMORE...BINGHAM AND BAYLE CITY.
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 3913 8886 3908 8940 3924 8947 3933 8914
3922 8913 3922 8888
TIME...MOT...LOC 1021Z 255DEG 32KT 3917 8933
WIND...HAIL <50MPH 1.00IN
$$
TES2 follow-up statements
284
WWUS53 KLSX 091032
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
532 AM CDT SAT APR 9 2011
ILC051-135-091100-
/O.CON.KLSX.SV.W.0035.000000T0000Z-110409T1100Z/
MONTGOMERY IL-FAYETTE IL-
532 AM CDT SAT APR 9 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
FAYETTE AND EAST CENTRAL MONTGOMERY COUNTIES UNTIL 600 AM CDT...
AT 530 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 7 MILES SOUTHEAST OF NOKOMIS...MOVING NORTHEAST AT
35 MPH.
LOCATIONS IMPACTED INCLUDE...
RAMSEY AND WRIGHTS CORNER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3913 8886 3908 8940 3924 8947 3933 8914
3922 8913 3922 8888
TIME...MOT...LOC 1032Z 247DEG 32KT 3922 8920
WIND...HAIL <50MPH 1.00IN
$$
TES739
WWUS53 KLSX 091100
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
600 AM CDT SAT APR 9 2011
ILC051-135-091110-
/O.EXP.KLSX.SV.W.0035.000000T0000Z-110409T1100Z/
MONTGOMERY IL-FAYETTE IL-
600 AM CDT SAT APR 9 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FAYETTE AND EAST
CENTRAL MONTGOMERY COUNTIES HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3913 8886 3908 8940 3924 8947 3933 8914
3922 8913 3922 8888
TIME...MOT...LOC 1032Z 247DEG 32KT 3922 8920
$$
TESThe 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, 5:25 AM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 35 min |
| Apr 9, 5:41 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Madison | 49 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.