Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 34, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 15, 1998, 6:56 PM CDT for Washington County, Illinois. It was in force for 64 min. 3 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, 6:56 PM CDT (23:56 UTC)
- Expired
- Apr 15, 1998, 8:00 PM CDT
- In force
- 64 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, IL
The radar
The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 23:56 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 |
|---|---|---|---|
| Apr 15, 7:09 PM CDT | Hail 0.75 | Nashville, IL | 3/4 inch hail was reported soouthwest of Nashville. |
| Apr 15, 7:24 PM CDT | Hail 0.75 | Richview, IL | County sheriff reported 3/4 inch hail |
| Apr 15, 7:30 PM CDT | Tornado F1 | Hoyleton, 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 12:00Z, 11.9 hours before the alert went out and 212 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
- 927 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 459 m²/s²
- 0-3 km storm-relative helicity
- 751 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KSTL 152357 RRA TORSTL ILC189-160100- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 656 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... WASHINGTON COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 800 PM CDT * AT 655 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO JUST NORTH OF OAKDALE... MOVING EAST-NORTHEAST 25 MPH. * LOCATIONS IN THE PATH... OAKDALE NASHVILLE BEAUCOUP NUMEROUS LARGE HAIL AND FUNNEL CLOUDS THIS IS A DANGEROUS SITUATION IF IN THE PATH...TAKE COVER NOW MOVE TO A BASEMENT IF AVAILABLE. IF NOT...STAY ON THE LOWEST LEVEL AND GO TO A SMALL INTERIOR ROOM. MOBILE HOMES AND AUTOMOBILESHOULD BE ABANDONED IN FAVOR OF A STRONG STRUCTURE. AS A LAST RESORT... MOVE TO A DITCH OR CULVERT AND COVER YOUR HEAD. 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, 5:02 PM CDT | Tornado Warning | LSX | Monroe, Randolph | 63 min |
| Apr 15, 5:24 PM CDT | Tornado Warning | LSX | Saint Clair | 66 min |
| Apr 15, 5:48 PM CDT | Tornado Warning | LSX | Randolph | 62 min |
| Apr 15, 6:01 PM CDT | Tornado Warning | LSX | Washington | 64 min |
| Apr 15, 6:24 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 61 min |
| Apr 15, 6:58 PM CDT | Tornado Warning | LSX | Bond, Clinton, Madison | 62 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; radar from the NEXRAD Level II archive.