Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 145, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 22, 1998, 3:50 AM CDT for Macoupin County, Illinois. It was in force for 65 min. 4 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 22, 1998, 3:50 AM CDT (08:50 UTC)
- Expired
- May 22, 1998, 4:55 AM CDT
- In force
- 65 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Macoupin County, IL
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 08:51 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 22, 4:25 AM CDT | Thunderstorm Wind 55 | Carlinville, IL | |
| May 22, 4:30 AM CDT | Thunderstorm Wind 56 | Gillespie, IL | |
| May 22, 4:30 AM CDT | Hail 1.5 | Mt Olive, IL | |
| May 22, 4:45 AM CDT | Thunderstorm Wind 56 | Staunton, 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 22, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 8.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 137 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 220850 RRA SVRSTL ILC117-220955- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 350 AM CDT FRI MAY 22 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS * UNTIL 455 AM CDT * AT 348 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES WEST OF PALMYRA... MOVING EAST AT 35 MPH. * LOCATIONS THAT WILL BE AFFECTED... PALMYRA GIRARD SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. DM/RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:06 AM CDT | Severe Thunderstorm Warning | LSX | Jersey | 64 min |
| May 22, 1:20 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 65 min |
| May 22, 1:52 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 63 min |
| May 22, 2:12 AM CDT | Severe Thunderstorm Warning | LSX | Jersey | 33 min |
| May 22, 2:17 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 48 min |
| May 22, 2:34 AM CDT | Severe Thunderstorm Warning | LSX | Pike | 61 min |
| May 22, 2:59 AM CDT | Tornado Warning | LSX | Pike | 51 min |
| May 22, 3:31 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene | 64 min |
| May 22, 4:08 AM CDT | Severe Thunderstorm Warning | LSX | Jersey | 47 min |
| May 22, 4:44 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 51 min |
| May 22, 5:02 AM CDT | Severe Thunderstorm Warning | LSX | Bond | 48 min |
| May 22, 5:20 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 50 min |
| May 22, 5:40 AM CDT | Severe Thunderstorm Warning | LSX | Marion | 50 min |
| May 22, 7:35 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 35 min |
| May 22, 8:00 AM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 50 min |
| May 22, 8:52 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 33 min |
| May 22, 9:22 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 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; radar from the NEXRAD Level II archive.