Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 108, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 20, 2000, 8:54 AM CDT for Montgomery County, Illinois. It was in force for 51 min. 1 report 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, 8:54 AM CDT (13:54 UTC)
- Expired
- Apr 20, 2000, 9:45 AM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Montgomery County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 20, 8:56 AM CDT | Hail 0.75 | Lake Lou Yaeger, 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 12:00Z, 1.9 hours before the alert went out and 127 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
- 595 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLSX 201355 SVRSTL ILC135-201445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 854 AM CDT THU APR 20 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN MONTGOMERY COUNTY ILLINOIS IN SOUTH CENTRAL ILLINOIS * UNTIL 945 AM CDT * AT 852 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTH OF LITCHFIELD... MOVING NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... FARMERSVILLE RAYMOND WAGGONER THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. FG/RP
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, 4:29 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Pike | 51 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, 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.