Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 68, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 1998, 7:30 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 65 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
- Apr 29, 1998, 7:30 PM CDT (00:30 UTC)
- Expired
- Apr 29, 1998, 8:35 PM CDT
- In force
- 65 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
The radar
The St Louis radar (KLSX), 11 km from the middle of the area, began a volume at 00:33 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 nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.5 hours before the alert went out and 323 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
- 2 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 537 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
075 WUUS1 KSTL 300031 RRA SVRSTL MOC183-189-300135- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 730 PM CDT WED APR 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN ST CHARLES COUNTY IN EAST CENTRAL MISSOURI EASTERN ST LOUIS COUNTY IN EAST CENTRAL MISSOURI * UNTIL 835 PM CDT * AT 725 PM CDT...AREA LAW ENFORCEMENT INDICATED A SEVERE THUNDERSTORM A SEVERE THUNDERSTORM NEAR CREVE COUER... MOVING NORTHEAST AROUND 15 MILES AN HOUR. * LOCATIONS THAT WILL BE AFFECTED... BRIDGETON AT 745 PM CDT FLORISSANT AT 750 PM CDT 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 IMMEDIATELY. TPS
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, Apr 29, 5:04 PM CDT, 2 hours 26 minutes before
ILZ058-059-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 504 PM CDT WED APR 29 1998 AT 5 PM...THE ST LOUIS WEATHER RADAR INDICATED A STORM NEAR GREENFIELD IN GREEN COUNTY ILLINOIS...THIS STORM WAS MOVING TO THE NORTHEAST AT 30 MPH AND WILL HIT THE CITY OF PALMYRA BY 515 PM. THIS STORM WILL CONINUE TO PRODUCE HEAVY RAIN AND SMALL HAIL.
Special weather statement, Apr 29, 5:04 PM CDT, 2 hours 26 minutes before
ILZ058-059-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 504 PM CDT WED APR 29 1998 AT 5 PM...THE ST LOUIS WEATHER RADAR INDICATED A STORM NEAR GREENFIELD IN GREEN COUNTY ILLINOIS...THIS STORM WAS MOVING TO THE NORTHEAST AT 30 MPH AND WILL HIT THE CITY OF PALMYRA BY 515 PM. THIS STORM WILL CONINUE TO PRODUCE HEAVY RAIN AND SMALL HAIL.
Special weather statement, Apr 29, 5:30 PM CDT, 2 hours before
ILZ099-100-MOZ061-063-300000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 530 PM CDT WED APR 29 1998 AT 530 PM...THE ST LOUIS WEATHER RADAR INDICATED A LINE OF STRONG THUNDERSTOMRS FROM ST CHARLES TO PORTAGE DES SIOUX IN ST CHARLES COUNTY. VERY HEAVY RAIN AND SMALL HAIL WILL ACCOMPANY THE STORMS. PERSONS IN ST CHARLES...PORTAGE DES SIOUX...BRIGHTON...AND MEDORA MAY EXPERIENCE SMALL HAIL AND HEAVY RAIN BETWEEN 530 PM AND 615 PM. THE STORMS WERE MOVING TO THE NORTHEAST AROUND 25 MILES AN HOUR.
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.