Alert archive / Illinois / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 99, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 9, 2003, 5:08 PM CDT for Randolph County, Illinois. It was in force for 22 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 9, 2003, 5:08 PM CDT (22:08 UTC)
- Expired
- May 9, 2003, 5:30 PM CDT
- In force
- 22 min
- Issued by
- NWS St. Louis, MO
- Area
- Counties, with a storm outline in the text
County Randolph County, IL
The radar
The St Louis radar (KLSX), 116 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 258 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
- 2615 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 389 m²/s²
- Significant tornado parameter
- 5.6
- Supercell composite
- 21.6
The text
As transmitted, in the capitals the NWS used until 2016.
019 WUUS53 KLSX 092208 SVRLSX ILC157-092230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 507 PM CDT FRI MAY 9 2003 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS * UNTIL 530 PM CDT * AT 507 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER BREMEN...MOVING EAST AT 35 MPH. STORM SPOTTERS REPORTED PENNY SIZE HAIL 1 MILE NORTH OF CHESTER AT 506 PM. * LOCATIONS IMPACTED INCLUDE... PERCY STEELVILLE SHILOH HILL 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 3804 8977 3789 8975 3790 8964 3810 8960 $$ JPK/MB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 39 min |
| May 8, 8:49 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 26 min |
| May 8, 10:21 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 39 min |
| May 9, 5:43 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 32 min |
| May 9, 5:56 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 49 min |
| May 9, 6:01 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 44 min |
| May 9, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 18 min |
| May 9, 6:42 PM CDT | Tornado Warning | LSX | Calhoun, Pike | 48 min |
| May 9, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 30 min |
| May 9, 6:52 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 38 min |
| May 9, 6:56 PM CDT | Tornado Warning | LSX | Greene, Macoupin | 49 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 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.