Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 140, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 12, 2000, 4:42 PM CDT for Macoupin County, Illinois. It was in force for 48 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 12, 2000, 4:42 PM CDT (21:42 UTC)
- Expired
- May 12, 2000, 5:30 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Macoupin County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 5:00 PM CDT | Hail 1 | Medora, 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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 146 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
- 2035 J/kg
- Mixed-layer CIN
- -305 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 283 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLSX 122151 COR SVRSTL ILC117-122230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...RETRANSMISSION FOR ISP NATIONAL WEATHER SERVICE ST LOUIS MO 442 PM CDT FRI MAY 12 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN AND CENTRAL MACOUPIN COUNTY IN CENTRAL ILLINOIS * UNTIL 530 PM CDT * AT 442 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES NORTHWEST OF MEDORA..MOVING EAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... CHESTERFIELD HETTICK CARLINVILLE NILWOOD GIRARD THIS THUNDERSTORM IS CAPABLE OF PRODUCING LARGE HAIL...WHICH CAN CAUSE EXTENSIVE PROPERTY DAMAGE AND SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3953 9017 3915 9016 3919 8971 3953 8972
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 3:41 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene | 49 min |
| May 12, 4:09 PM CDT | Severe Thunderstorm Warning | LSX | Jersey | 51 min |
| May 12, 4:30 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 50 min |
| May 12, 5:02 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin | 48 min |
| May 12, 5:42 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 58 min |
| May 12, 6:01 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Madison | 64 min |
| May 12, 6:05 PM CDT | Tornado Warning | LSX | Bond, Madison | 50 min |
| May 12, 6:49 PM CDT | Tornado Warning | LSX | Fayette | 51 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.