Alert archive / Illinois / Tornado Warnings in 2002
Tornado Warning 12, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 1, 2002, 2:54 PM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 21 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 1, 2002, 2:54 PM CDT (19:54 UTC)
- Expired
- May 1, 2002, 3:15 PM CDT
- In force
- 21 min
- Issued by
- NWS St. Louis, MO
- Area
- Counties, with a storm outline in the text
Counties Macoupin County, IL, Montgomery County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 1, 3:00 PM CDT | Tornado F0 | Palmyra, IL | A small tornado formed just west of Palmyra and was witnessed by several people. The tornado took down some trees and power lines. |
| May 1, 3:12 PM CDT | Hail 1 | Farmersville, IL | Amateur radio spotters reported 1 inch hail in Farmersville. |
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 |
|---|---|---|---|
| May 1, 12:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 1, 2:30 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.9 hours before the alert went out and 137 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
- 1126 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KLSX 011954 TORSTL ILC117-135-012015- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 250 PM CDT WED MAY 1 2002 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS NORTHERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS * UNTIL 315 PM CDT * AT 250 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR PALMYRA. THE THUNDERSTORM WAS MOVING EAST AT 55 MPH...AND MAY PRODUCE A TORNADO AT ANY TIME * LOCATIONS IN THE PATH... GIRARD NILWOOD STANDARD CITY VIRDEN WAGGONER FARMERSVILLE ATWATER WHITE OAK HARVEL RAYMOND THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR MACOUPIN COUNTY. IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW MOVE TO A BASEMENT...UNDERGROUND STORM SHELTER...OR AN INTERIOR ROOM OR HALLWAY ON THE LOWEST LEVEL OF A STURDY BUILDING. LAT...LON 3953 9016 3932 9015 3926 8953 3952 8955
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 1:33 PM CDT | Tornado Warning | LSX | Bond | 42 min |
| May 1, 1:56 PM CDT | Tornado Warning | LSX | Marion | 49 min |
Nearby
Tornado Warnings in Illinois, 2002Every tornado warning in 2002Tornadoes in 2002
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.