Alert archive / Illinois / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 57, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 4, 2003, 4:58 PM CDT for Calhoun County, Jersey County, Illinois; Saint Charles County, Missouri. It was in force for 32 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
- May 4, 2003, 4:58 PM CDT (21:58 UTC)
- Expired
- May 4, 2003, 5:30 PM CDT
- In force
- 32 min
- Issued by
- NWS St. Louis, MO
- Area
- Counties, with a storm outline in the text
Counties Calhoun County, IL, Jersey County, IL, Saint Charles County, MO
The radar
The St Louis radar (KLSX), 35 km from the middle of the area, began a volume at 22:01 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, 10.0 hours before the alert went out and 209 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
- 1363 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
643 WUUS53 KLSX 042158 SVRLSX ILC013-083-MOC183-042230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 459 PM CDT SUN MAY 4 2003 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI SOUTHEASTERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS SOUTHERN JERSEY COUNTY IN SOUTHWEST ILLINOIS * UNTIL 530 PM CDT * AT 459 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 13 MILES WEST OF GRAFTON...MOVING EAST AT 55 MPH. THE PRIMARY THREAT FROM THIS STORM WILL BE DAMAGING HAIL. * LOCATIONS IMPACTED INCLUDE... GRAFTON ELSAH PORTAGE DES SIOUX JERSEYVILLE 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 3898 9077 3881 9070 3899 9008 3915 9024 $$ CARNEY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 4:44 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 46 min |
| May 4, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 16 min |
| May 4, 5:22 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 53 min |
| May 4, 6:01 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 44 min |
| May 4, 5:27 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Moniteau | 63 min |
| May 4, 7:32 AM CDT | Severe Thunderstorm Warning | LSX | Osage | 43 min |
| May 4, 5:07 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Montgomery, Pike | 33 min |
| May 4, 5:40 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 50 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2003Severe Thunderstorm Warnings in Missouri, 2003Every severe thunderstorm warning in 2003
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.