Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 287, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 29, 1998, 5:42 PM CDT for Greene County, Macoupin County, Montgomery 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
- Jun 29, 1998, 5:42 PM CDT (22:42 UTC)
- Expired
- Jun 29, 1998, 6:45 PM CDT
- In force
- 63 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Greene County, IL, Macoupin County, IL, Montgomery County, IL
The radar
The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 22:43 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 |
|---|---|---|---|
| Jun 29, 6:00 PM CDT | Thunderstorm Wind 55 | Farmersville, IL | |
| Jun 29, 6:05 PM CDT | Thunderstorm Wind 55 | Carrollton, IL | |
| Jun 29, 6:20 PM CDT | Thunderstorm Wind 55 | Hillsboro, 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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 149 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
- 2020 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
704 WUUS1 KSTL 292243 RRA SVRSTL ILC061-117-135-292345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 542 PM CDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GREENE COUNTY IN WEST CENTRAL ILLINOIS MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS MONTGOMERY COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 645 PM CDT * AT 538 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM DECATUR ILLINOIS TO 15 MILES NORTH OF CARROLTON ILLINOIS... MOVING SOUTH SOUTHEAST AT 40 TO 45 MPH. * LOCATIONS THAT WILL BE AFFECTED... WHITE HALL PALMYRA FARMERVILLE DAMAGING WINDS WERE REPORTED OVER PARTS OF SAGAMON COUNTY BETWEEN 530 AND 540 PM CDT. THIS STORM HAS A HISTORY OF DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. RP/VA &
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 29, 3:42 PM CDT, 2 hours before
ILZ064-069-070-074-079-100>102-MOZ061-063>065-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 342 PM CDT MON JUN 29 1998 ...HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS HAS EXPIRED... A COLD FRONT ACROSS THE UPPER MIDWEST WILL MOVE SOUTHWARD THROUGH MISSOURI LATE TONIGHT AND TUESDAY. YOU CAN EXPECT SHOWERS AND THUNDERSTORMS WITH THIS FRONT AS IT PASSES THROUGH THE AREA OVER THE NEXT 24 HOURS. IN TURN...A RELATIVELY COOLER AND LESS HUMID AIR MASS WILL SETTLE OVER THE AREA LATE TUESDAY THROUGH WEDNESDAY. THUS...THE HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS...INCLUDING THE ST LOUIS METROPOLITAN AREA...WILL BE ALLOWED TO EXPIRE. METZE
Special weather statement, Jun 29, 3:42 PM CDT, 2 hours before
ILZ064-069-070-074-079-100>102-MOZ061-063>065-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 342 PM CDT MON JUN 29 1998 ...HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS HAS EXPIRED... A COLD FRONT ACROSS THE UPPER MIDWEST WILL MOVE SOUTHWARD THROUGH MISSOURI LATE TONIGHT AND TUESDAY. YOU CAN EXPECT SHOWERS AND THUNDERSTORMS WITH THIS FRONT AS IT PASSES THROUGH THE AREA OVER THE NEXT 24 HOURS. IN TURN...A RELATIVELY COOLER AND LESS HUMID AIR MASS WILL SETTLE OVER THE AREA LATE TUESDAY THROUGH WEDNESDAY. THUS...THE HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS...INCLUDING THE ST LOUIS METROPOLITAN AREA...WILL BE ALLOWED TO EXPIRE. METZE
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 7:51 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 34 min |
| Jun 28, 8:59 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 36 min |
| Jun 29, 12:05 AM CDT | Flash Flood Warning | LSX | Adams | 4 hr |
| Jun 29, 12:05 AM CDT | Flash Flood Warning | LSX | Brown | 4 hr |
| Jun 29, 4:30 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 65 min |
| Jun 29, 4:51 PM CDT | Flash Flood Warning | LSX | Adams, Brown | 3 hr |
| Jun 29, 5:04 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 61 min |
| Jun 29, 6:19 PM CDT | Severe Thunderstorm Warning | LSX | Jersey | 46 min |
| Jun 29, 6:29 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette | 61 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.