Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 101, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 12, 1998, 10:36 PM CDT for Macoupin County, Illinois. It was in force for 49 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, 10:36 PM CDT (03:36 UTC)
- Expired
- May 12, 1998, 11:25 PM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Macoupin County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 11:06 PM CDT | Hail 1.75 | Hornsby, IL | |
| May 12, 11:16 PM CDT | Hail 1.75 | Bunker Hill, IL | |
| May 12, 11:20 PM CDT | Hail 1.75 | Bunker Hill, 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, 7:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.6 hours before the alert went out and 150 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
- 1906 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1317 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 130336 RRA SVRSTL ILC117-130425- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1036 PM CDT TUE MAY 12 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS * UNTIL 1125 PM CDT * AT 1033 PM CDT...SEVERE STORM SPOTTERS REPORTED DIME SIZE HAIL IN BUNKER HILL...MOVING NORTHEAST AT 20 MPH. * LOCATIONS THAT WILL BE AFFECTED... WILSONVILLE STAUNTON WHITE CITY MT. OLIVE THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING PIMMEDIATELY. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. METZE/GLASS &
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 7:04 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 51 min |
| May 12, 7:49 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 61 min |
| May 12, 8:16 PM CDT | Tornado Warning | LSX | Macoupin | 49 min |
| May 12, 8:43 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 47 min |
| May 12, 9:54 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 46 min |
| May 12, 9:56 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 49 min |
| May 12, 10:08 PM CDT | Tornado Warning | LSX | Montgomery | 47 min |
| May 12, 11:00 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 50 min |
| May 12, 11:22 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 48 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1998Every severe thunderstorm warning 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.