Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 71, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 1, 1998, 6:38 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 62 min. 1 report 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 1, 1998, 6:38 PM CDT (23:38 UTC)
- Expired
- May 1, 1998, 7:40 PM CDT
- In force
- 62 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
The radar
The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 23:37 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 1, 7:30 PM CDT | Hail 0.88 | Bridgeton, MO | A storm spotter reported that hail up to nickel size fell in Bridgeton. |
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, 11.6 hours before the alert went out and 224 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
- 147 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 505 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
753 WUUS1 KSTL 012340 RRA SVRSTL MOC189-510-020040- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 638 PM CDT FRI MAY 1 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ST LOUIS COUNTY IN EAST CENTRAL MISSOURI ST LOUIS CITY IN EAST CENTRAL MISSOURI * UNTIL 740 PM CDT * AT AT 630 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTHEAST OF ST CHARLES... MOVING THE STORM WAS MOVING SOUTH AT 20 MPH. * LOCATIONS THAT WILL BE AFFECTED... MARYLAND HEIGHTS UNIVERSITY CITY KIRKWOOD 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. WDB
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, May 1, 2:15 PM CDT, 4 hours 23 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-020100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 215 PM CDT FRI MAY 1 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THUNDERSTORMS WILL BE SCATTERED ACROSS THE AREA THIS AFTERNOON AND EARLY THIS EVENING. A FEW OF THESE STORMS MAY PRODUCE HAIL AND HEAVY RAIN...HOWEVER NO WIDESPREAD SEVERE WEATHER IS EXPECTED. ALTHOUGH A FEW OF THE STORMS MAY BRIEFLY APPROACH SEVERE LIMITS...AT THIS TIME SPOTTER ACTIVITION IS NOT ANTICIPATED. TRUETT
Special weather statement, May 1, 2:15 PM CDT, 4 hours 23 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-020100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 215 PM CDT FRI MAY 1 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THUNDERSTORMS WILL BE SCATTERED ACROSS THE AREA THIS AFTERNOON AND EARLY THIS EVENING. A FEW OF THESE STORMS MAY PRODUCE HAIL AND HEAVY RAIN...HOWEVER NO WIDESPREAD SEVERE WEATHER IS EXPECTED. ALTHOUGH A FEW OF THE STORMS MAY BRIEFLY APPROACH SEVERE LIMITS...AT THIS TIME SPOTTER ACTIVITION IS NOT ANTICIPATED. TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 6:18 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 47 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.