Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 290, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 29, 1998, 6:34 PM CDT for Clark County, Missouri. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1998, 6:34 PM CDT (23:34 UTC)
- Expired
- Jun 29, 1998, 7:25 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Clark County, MO
The radar
The Quad Cities radar (KDVN), 165 km from the middle of the area, began a volume at 23:34 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 29, 4:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 170 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
- 917 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
073 WUUS1 KSTL 292335 RRA SVRSTL MOC045-300025- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 634 PM CDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CLARK COUNTY IN NORTHEASTERN MISSOURI * UNTIL 725 PM CDT * AT 633 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES KAHOKA MISSOURI... MOVING SOUTHEAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... ALEXANDRIA ST. FRANCISVILLE THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY FROM 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 52 minutes 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 52 minutes 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, 7:40 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 45 min |
| Jun 28, 11:40 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Scotland | 45 min |
| Jun 29, 12:05 AM CDT | Flash Flood Warning | LSX | Lewis | 4 hr |
| Jun 29, 5:17 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 48 min |
| Jun 29, 5:34 AM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 46 min |
| Jun 29, 3:37 PM CDT | Severe Thunderstorm Warning | LSX | Clark | 48 min |
| Jun 29, 3:43 PM CDT | Severe Thunderstorm Warning | LSX | Scotland | 47 min |
| Jun 29, 4:11 PM CDT | Flash Flood Warning | LSX | Clark, Scotland | 3 hr |
| Jun 29, 4:30 PM CDT | Severe Thunderstorm Warning | LSX | Clark, Knox, Lewis, Scotland | 65 min |
| Jun 29, 4:51 PM CDT | Flash Flood Warning | LSX | Lewis | 3 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.