Alert archive / Illinois / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 237, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 22, 2004, 6:44 PM CDT for Saint Clair County, Illinois. It was in force for 61 min. 3 reports 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
- Jul 22, 2004, 6:44 PM CDT (23:44 UTC)
- Expired
- Jul 22, 2004, 7:45 PM CDT
- In force
- 61 min
- Issued by
- NWS St. Louis, MO
- Area
- Counties, with a storm outline in the text
County Saint Clair County, IL
The radar
The St Louis radar (KLSX), 69 km from the middle of the area, began a volume at 23:43 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 |
|---|---|---|---|
| Jul 22, 6:50 PM CDT | HAIL 1.25 | Belleville, IL | QUARTER TO HALF DOLLAR SIZE HAIL - EAST SIDE OF BELLEVILLE. |
| Jul 22, 7:07 PM CDT | HAIL 0.88 | Belleville, IL | WEST SIDE OF BELLEVILLE EXPERIENCE DIME TO NICKLE SIZE HAIL. |
| Jul 22, 7:20 PM CDT | HAIL 0.88 | Fairview Heights, IL |
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, 11.7 hours before the alert went out and 214 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
- 1619 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 917 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KLSX 222344
SVRLSX
ILC163-230045-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
644 PM CDT THU JUL 22 2004
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS
* UNTIL 745 PM CDT
* AT 644 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER CENTREVILLE...MOVING EAST AT 20 MPH.
* LOCATIONS IMPACTED INCLUDE...
SWANSEA
OFALLON
SHILOH
SCOTT AFB
LEBANON
MASCOUTAH
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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 3843 8973 3844 8974 3849 9007 3849 9012
3850 9014 3865 9012 3866 9011 3865 8971
3843 8972
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 2:21 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 84 min |
| Jul 22, 3:48 PM CDT | Severe Thunderstorm Warning | LSX | Bond | 42 min |
| Jul 22, 4:26 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 49 min |
| Jul 22, 4:34 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 71 min |
| Jul 22, 5:15 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 60 min |
| Jul 22, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 59 min |
| Jul 22, 5:55 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 50 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2004Every severe thunderstorm warning in 2004
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.