Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 154, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2011, 2:42 PM CDT for Calhoun County, Greene County, Jersey County, Illinois. It was in force for 48 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
- May 11, 2011, 2:42 PM CDT (19:42 UTC)
- Expired
- May 11, 2011, 3:30 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Greene County, IL, Jersey County, IL
The radar
The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 19:45 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 |
|---|---|---|---|
| May 11, 2:52 PM CDT | HAIL 1 | Golden Eagle, IL | STILL HAILING. |
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, 7.7 hours before the alert went out and 201 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
- 2360 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 875 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -68 m²/s²
- 0-3 km storm-relative helicity
- -51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
738
WUUS53 KLSX 111942
SVRLSX
ILC013-061-083-112030-
/O.NEW.KLSX.SV.W.0154.110511T1942Z-110511T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
242 PM CDT WED MAY 11 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
JERSEY COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 330 PM CDT
* AT 237 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES
SOUTHEAST OF WINFIELD...OR 9 MILES NORTHEAST OF ST. PAUL...AND
MOVING NORTHEAST AT 20 MPH.
* LOCATIONS IMPACTED INCLUDE...
JERSEYVILLE...GRAFTON...OLD KANE...CARROLLTON...MEPPEN...DEER
PLAIN...NUTWOOD...FIELDON...OTTERVILLE...MCCLUSKY...DELHI AND KANE.
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 3933 9040 3902 9015 3900 9023 3900 9027
3898 9028 3895 9038 3897 9042 3897 9046
3891 9050 3888 9060 3898 9068 3906 9071
3910 9068
TIME...MOT...LOC 1942Z 236DEG 18KT 3897 9059
WIND...HAIL 60MPH 1.75IN
$$
GLASS2 follow-up statements
174
WWUS53 KLSX 111955 RRA
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
255 PM CDT WED MAY 11 2011
ILC013-061-083-112030-
/O.CON.KLSX.SV.W.0154.000000T0000Z-110511T2030Z/
JERSEY IL-CALHOUN IL-GREENE IL-
255 PM CDT WED MAY 11 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
GREENE...CALHOUN AND JERSEY COUNTIES UNTIL 330 PM CDT...
AT 250 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
WEST OF GRAFTON...OR 12 MILES NORTH OF ST. CHARLES...MOVING NORTHEAST
AT 20 MPH.
IN ADDITION...AT 252 PM...A SPOTTER REPORTED QUARTER SIZE HAIL IN
GOLDEN EAGLE.
LOCATIONS IMPACTED INCLUDE...
JERSEYVILLE...GRAFTON...OLD KANE...CARROLLTON...NUTWOOD...
FIELDON...OTTERVILLE...MCCLUSKY...DELHI AND KANE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3902 9015 3900 9023 3900 9027 3898 9028
3895 9038 3897 9042 3897 9046 3891 9052
3892 9058 3896 9060 3913 9063 3933 9040
TIME...MOT...LOC 1954Z 236DEG 18KT 3898 9052
WIND...HAIL 60MPH 1.75IN
$$
GLASS867
WWUS53 KLSX 112019
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
319 PM CDT WED MAY 11 2011
ILC013-112029-
/O.CAN.KLSX.SV.W.0154.000000T0000Z-110511T2030Z/
CALHOUN IL-
319 PM CDT WED MAY 11 2011
...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3902 9015 3900 9023 3900 9027 3898 9028
3895 9038 3897 9042 3897 9048 3895 9052
3899 9057 3903 9057 3905 9059 3907 9058
3914 9062 3933 9040
TIME...MOT...LOC 2019Z 237DEG 17KT 3904 9039
$$
ILC061-083-112030-
/O.CON.KLSX.SV.W.0154.000000T0000Z-110511T2030Z/
JERSEY IL-GREENE IL-
319 PM CDT WED MAY 11 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
GREENE AND JERSEY COUNTIES UNTIL 330 PM CDT...
AT 315 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
GRAFTON...OR 8 MILES SOUTHWEST OF JERSEYVILLE...MOVING NORTHEAST AT
20 MPH.
LOCATIONS IMPACTED INCLUDE...
JERSEYVILLE...OLD KANE...CARROLLTON...MCCLUSKY...DELHI AND KANE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3902 9015 3900 9023 3900 9027 3898 9028
3895 9038 3897 9042 3897 9048 3895 9052
3899 9057 3903 9057 3905 9059 3907 9058
3914 9062 3933 9040
TIME...MOT...LOC 2019Z 237DEG 17KT 3904 9039
WIND...HAIL 60MPH 1.00IN
$$
CARNEYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 1:57 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 48 min |
| May 11, 2:06 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 24 min |
| May 11, 2:07 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 38 min |
| May 11, 2:28 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 47 min |
| May 11, 2:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 44 min |
| May 11, 2:51 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 39 min |
| May 11, 3:15 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 45 min |
| May 11, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 15 min |
| May 11, 4:15 PM CDT | Areal Flood Advisory | LSX | Adams, Pike | 4 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.