Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 325, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 29, 1998, 4:27 PM CST for Jefferson County, Missouri. It was in force for 48 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
- Oct 29, 1998, 4:27 PM CST (22:27 UTC)
- Expired
- Oct 29, 1998, 5:15 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Jefferson County, MO
The radar
The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 22:31 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 |
|---|---|---|---|
| Oct 29, 3:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 268 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
- 934 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 203 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 292227 SVRSTL MOC099-292315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 427 PM CST THU OCT 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI * UNTIL 515 PM CST * AT 425 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTH OF RICHWOODS... MOVING EAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... HILLSBORO FESTUS 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. CA/JK
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, Oct 29, 11:08 AM CST, 5 hours 19 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>075-084-085-099-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1108 AM CST THU OCT 29 1998 ...SEVERE WEATHER POSSIBLE THIS AFTERNOON AND THIS EVENING... THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND THIS EVENING OVER THE ENTIRE AREA...THIS INCLUDES MOST OF CENTRAL AND EASTERN MISSOURI AND A GOOD PORTION OF WESTERN ILLINOIS. A COLD FRONT ACROSS EASTERN KANSAS WILL PUSH INTO WESTERN MISSOURI THIS AFTERNOON AND INTO EASTERN MISSOURI THIS EVENING. AS THIS FRONT ENCOUNTERS UNSEASONABLY WARM...MOIST AND UNSTABLE AIR ACROSS THE AREA...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP. INCREASING WINDS ALOFT WILL CREATE FAVORABLE WIND SHEAR PROFILES FOR STRONG TO SEVERE THUNDERSTORMS...INCLUDING A FEW SUPERCELLS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD MONITOR WEATHER DEVELOPMENxTS...AND BE READY FOR POSSIBLE SKYWARN ACTION. GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 29, 4:02 PM CST | Severe Thunderstorm Warning | LSX | Washington | 63 min |
| Oct 29, 5:40 PM CST | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.