Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 41, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 12, 1998, 5:57 PM CDT for Brown County, Illinois. It was in force for 63 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
- May 12, 1998, 5:57 PM CDT (22:57 UTC)
- Expired
- May 12, 1998, 7:00 PM CDT
- In force
- 63 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Brown County, IL
The radar
The Lincoln radar (KILX), 122 km from the middle of the area, began a volume at 22:59 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 |
|---|---|---|---|
| May 12, 6:00 PM CDT | Hail 1.75 | Versailles, IL | |
| May 12, 6:03 PM CDT | Hail 1.25 | Hersman, IL | |
| May 12, 6:05 PM CDT | Hail 2.75 | Hersman, 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 |
|---|---|---|---|
| May 12, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 184 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
- 1323 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 122257 RRA TORSTL ILC009-122355- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 557 PM CDT TUE MAY 12 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN BROWN COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 700 PM CDT * AT 555 PM... SEVERE STORM SPOTTERS INDICATED A TORNADO 5 MILES SOUTH OF BUCKHORN... MOVING EAST AT 20 MPH. * LOCATIONS IN THE PATH... VERSAILLES 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. FG/DLF
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 5:01 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 34 min |
| May 12, 5:20 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 65 min |
| May 12, 5:38 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 62 min |
| May 12, 6:00 PM CDT | Tornado Warning | LSX | Brown | 60 min |
| May 12, 6:28 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 37 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.