Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 455, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 11, 2000, 10:32 PM CDT for Greene County, Illinois. It was in force for 58 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
- Sep 11, 2000, 10:32 PM CDT (03:32 UTC)
- Expired
- Sep 11, 2000, 11:30 PM CDT
- In force
- 58 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Greene County, IL
The radar
The St Louis radar (KLSX), 84 km from the middle of the area, began a volume at 03:31 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 |
|---|---|---|---|
| Sep 11, 11:05 PM CDT | Thunderstorm Wind 56 E | Roodhouse, IL | Roodhouse Police reported trees and power lines down. |
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 |
|---|---|---|---|
| Sep 11, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.5 hours before the alert went out and 176 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
- 3019 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1421 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLSX 120333 SVRSTL ILC061-120430- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1032 PM CDT MON SEP 11 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GREENE COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 1130 PM CDT * AT 1032 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES WEST OF WHITE HALL...MOVING EAST AT 40 MPH. * LOCATIONS IN THE PATH... WHITE HALL ROODHOUSE ATHENSVILLE GREENFIELD THE PRIMARY THREAT POSED BY THIS STORM IS DAMAGING WINDS. MOVE QUICKLY TO THE INTERIOR PORTION OF A STURDY SHELTER...AND STAY AWAY FROM OUTSIDE WALLS AND WINDOWS. LAT...LON 3954 9061 3936 9064 3921 9014 3951 9016
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 9:10 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 65 min |
| Sep 11, 9:32 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 58 min |
| Sep 11, 10:09 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 66 min |
| Sep 11, 10:51 PM CDT | Severe Thunderstorm Warning | LSX | Jersey | 39 min |
| Sep 11, 10:53 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 52 min |
| Sep 11, 11:16 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 59 min |
| Sep 12, 12:01 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 59 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; radar from the NEXRAD Level II archive.