Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 33, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 15, 1998, 6:01 PM CDT for Washington County, Illinois. It was in force for 64 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, 6:01 PM CDT (23:01 UTC)
- Expired
- Apr 15, 1998, 7:05 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 23:01 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, 6:32 PM CDT | Tornado F0 | Nashville, IL | Severe storm spotters reported a brief tornado in open country. There was no damage. |
| Apr 15, 7:09 PM CDT | Hail 0.75 | Nashville, IL | 3/4 inch hail was reported soouthwest of Nashville. |
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, 11.0 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.
737 WFUS1 KSTL 152300 RRA TORSTL ILC189-160005- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 601 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN WASHINGTON COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 705 PM CDT * AT AT 552 PM CDT... SEVERE STORM SPOTTERS INDICATED A TORNADO NEAR REDBUD... MOVING EAST 25 MPH. * LOCATIONS IN THE PATH... CASPARS OAKDALE POSEN A TORNADO IS ON THE GROUND IN YOU ARE IN THE PATH...MOVE IMMEDIATELY TO A SUBSTANTIAL STRUCTURE NOW FOR PROTECTION. A BASEMENT OFFERS THE BEST SHELTER. YOUR LIFE AND THE LIVES OF THOSE AROUND YOU MAY DEPEND ON YOUR ACTIONS. RP/DM &
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, 6:24 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 61 min |
| Apr 15, 6:56 PM CDT | Tornado Warning | LSX | Washington | 64 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.