Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 15, 1998, 7:51 PM CDT for Marion County, Illinois. It was in force for 49 min. 2 reports 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 15, 1998, 7:51 PM CDT (00:51 UTC)
- Expired
- Apr 15, 1998, 8:40 PM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Marion County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 15, 7:52 PM CDT | Tornado F2 | Walnut Hill, IL | |
| Apr 15, 8:05 PM CDT | Tornado F1 | Cartter, 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 15, 4:30 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.9 hours before the alert went out and 169 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
- 426 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 919 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
323 WFUS1 KSTL 160053 RRA TORSTL ILC121-160140- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 751 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN MARION COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 840 PM CDT * AT 750 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 10 MILES SOUTHEAST OF CENTRALIA NEAR WALNUT HILL... MOVING EAST-NORTHEAST 25 MPH. * LOCATIONS IN THE PATH... KELL CARTTER HELM DOPPLER RADAR IS SHOWING A STRONG TORNADO SIGNAL. IF YOU ARE IN THE PATH MOVE TO A SHELTER NOW A BASEMENT IS BEST...BUT IF NOT AVAILABLE...MOVE TO THE LOWEST LEVEL AND HIDE IN A SMALL INTERIOR ROOM. GET OUT OF MOBILE HOMES AND CARS IN FAVOR OF A STRONG BUILDING. METZE/GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 7:00 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 65 min |
| Apr 15, 7:35 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 65 min |
| Apr 15, 7:57 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 48 min |
Nearby
Tornado Warnings in Illinois, 1998Every tornado warning in 1998Tornadoes in 1998
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.