Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 155, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 18, 2000, 4:43 PM CDT for Macoupin County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 47 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 18, 2000, 4:43 PM CDT (21:43 UTC)
- Expired
- May 18, 2000, 5:30 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Macoupin County, IL, Madison County, IL, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 45 km from the middle of the area, began a volume at 21:44 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 18, 4:45 PM CDT | Hail 1 | Brighton, IL | Storm spotters reported 1 inch hail. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 18, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 198 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
- 557 J/kg
- Mixed-layer CIN
- -308 J/kg
- Mixed-layer LCL
- 1218 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 351 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLSX 182147 SVRSTL ILC117-119-MOC183-189-182230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 443 PM CDT THU MAY 18 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN MACOUPIN COUNTY IN CENTRAL ILLINOIS EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI NORTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI MADISON COUNTY IN SOUTHWEST ILLINOIS * UNTIL 530 PM CDT * AT 443 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED TWO SEVERE THUNDERSTORMS. ONE WAS NEAR ST. CHARLES AND THE SECOND WAS 5 MILES NORTHWEST OF ALTON. BOTH STORMS ARE MOVING EAST NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... BUNKER HILL ALTON STAUNTON FLORRISANT PORTAGE DE SIOUX 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 3888 9058 3868 9049 3867 8973 3928 8970 @ 3927 9016 3900 9015
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 4:12 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Macoupin, Madison | 48 min |
| May 18, 5:18 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Montgomery | 42 min |
| May 18, 5:31 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 29 min |
| May 18, 3:29 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Warren | 46 min |
| May 18, 4:16 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis | 29 min |
| May 18, 4:29 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 46 min |
| May 18, 5:03 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Washington | 42 min |
| May 18, 5:34 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 26 min |
| May 18, 5:53 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 22 min |
| May 18, 6:29 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 46 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2000Severe Thunderstorm Warnings in Missouri, 2000Every severe thunderstorm warning in 2000
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.