Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 240, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 20, 2000, 10:28 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 47 min. No storm report in the archive falls 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.
The facts
- Issued
- Jun 20, 2000, 10:28 PM CDT (03:28 UTC)
- Expired
- Jun 20, 2000, 11:15 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Monroe County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 03:28 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 20, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.5 hours before the alert went out and 232 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
- 831 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 828 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 15.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KLSX 210328
SVRSTL
ILC133-163-210415-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1028 PM CDT TUE JUN 20 2000
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS
SOUTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS
* UNTIL 1115 PM CDT
* AT 1028 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER COLUMBIA...MOVING EAST AT 30 MPH.
* LOCATIONS IN THE PATH...
WATERLOO
SMITHTON
NEW ATHENS
THE PRIMARY THREAT POSED BY THIS STORM IS DAMAGING WINDS. MOVE
QUICKLY TO THE INTERIOR PORTION OF A STURDY SHEWLTER...AND STAY AWAY
FROM OUTSIDE WALLS AND WINDOWS.
LAT...LON 3856 9025 3843 9040 3828 9022 3825 8971
3846 8991The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:19 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 41 min |
| Jun 20, 8:58 PM CDT | Severe Thunderstorm Warning | LSX | Jersey | 47 min |
| Jun 20, 9:14 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 61 min |
| Jun 20, 9:35 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 25 min |
| Jun 20, 9:54 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Montgomery | 51 min |
| Jun 20, 10:43 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.