Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 103, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 20, 2000, 4:29 AM CDT for Calhoun County, Pike County, Illinois. It was in force for 51 min. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 20, 2000, 4:29 AM CDT (09:29 UTC)
- Expired
- Apr 20, 2000, 5:20 AM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Calhoun County, IL, Pike County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 20, 4:50 AM CDT | Thunderstorm Wind 62 E | Summer Hill, IL | |
| Apr 20, 4:55 AM CDT | Thunderstorm Wind 62 E | Pittsfield, IL | |
| Apr 20, 4:55 AM CDT | Thunderstorm Wind 62 E | Valley City, IL | |
| Apr 20, 4:55 AM CDT | Thunderstorm Wind 60 E | Kampsville, IL | |
| Apr 20, 4:55 AM CDT | Thunderstorm Wind 60 E | Brussels, IL |
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 |
|---|---|---|---|
| Apr 20, 4:15 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 9.5 hours before the alert went out and 204 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
- 1377 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 334 m²/s²
- 0-3 km storm-relative helicity
- 489 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
360 WUUS53 KLSX 200929 SVRSTL ILC013-149-201020- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 429 AM CDT THU APR 20 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS PIKE COUNTY ILLINOIS IN WEST CENTRAL ILLINOIS * UNTIL 520 AM CDT * AT 428 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM LOUISIANA TO NEAR TROY MISSOURI.. . MOVING NORTHEAST AT 60 MPH. * LOCATIONS THAT WILL BE AFFECTED... PITTSFIELD PLEASANT HILL KAMPSVILLE HARDIN THIS STORM HAS A HISTORY OF DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. WDB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 8:47 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 33 min |
| Apr 19, 8:57 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 33 min |
| Apr 20, 3:46 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 49 min |
| Apr 20, 4:49 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey | 46 min |
| Apr 20, 5:06 AM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 49 min |
| Apr 20, 7:18 AM CDT | Severe Thunderstorm Warning | LSX | Jersey | 42 min |
| Apr 20, 7:29 AM CDT | Severe Thunderstorm Warning | LSX | Greene | 46 min |
| Apr 20, 8:02 AM CDT | Tornado Warning | LSX | Macoupin | 43 min |
| Apr 20, 8:54 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 51 min |
| Apr 20, 9:37 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette | 48 min |
| Apr 20, 10:27 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 48 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 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.