Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 62, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 15, 1998, 11:57 PM CDT for Saint Charles County, Missouri. It was in force for 48 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
- Apr 15, 1998, 11:57 PM CDT (04:57 UTC)
- Expired
- Apr 16, 1998, 12:45 AM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Saint Charles County, MO
The radar
The St Louis radar (KLSX), 9 km from the middle of the area, began a volume at 04:58 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 |
|---|---|---|---|
| Apr 16, 12:00 AM CDT | Hail 0.75 | Harvester, MO |
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 00:00Z, 5.0 hours before the alert went out and 234 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
- 426 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 919 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 160454 RRA SVRSTL MOC183-160545- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1157 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN ST CHARLES COUNTY IN EAST CENTRAL MISSOURI * UNTIL 1245 AM CDT * AT 1150 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR ST. PETERS MISSOURI... MOVING NORTHEAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... ST. CHARLES ST. PETERS PORTAGE DES SIOUX 3/4 INCH HAIL WAS REPORTED IN THE ST PETERS AREA. THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE EXTENSIVE PrROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. PEDIGO
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 15, 6:58 PM CDT, 4 hours 59 minutes before
MOZ041-047>051-059>065-072>074-084-099-160100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 658 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR PARTS OF CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI UNTIL 11PM. THIS WATCH REPLACES WATCH 214 THAT WAS IN EFFECT UNTIL 7PM. AMS
Special weather statement, Apr 15, 9:21 PM CDT, 2 hours 36 minutes before
MOZ041-048>00-160330- SPECIAL WEATHER STATEMENT NPur* m4uRq:4jq:Un.:*n.oZj.,LX
Special weather statement, Apr 15, 9:24 PM CDT, 2 hours 33 minutes before
MOZ041-048>050-160330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 924 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE HAS CANCELLED THE TORNADO WATCH FOR BOONE...CALLAWAY...OSAGE...AND COLE COUNTIES IN MISSOURI. THE THREAT OF SEVERE WEATHER HAS ENDED IN THIS AREA. AMS
Special weather statement, Apr 15, 9:24 PM CDT, 2 hours 33 minutes before
MOZ041-048>050-160330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 924 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE HAS CANCELLED THE TORNADO WATCH FOR BOONE...CALLAWAY...OSAGE...AND COLE COUNTIES IN MISSOURI. THE THREAT OF SEVERE WEATHER HAS ENDED IN THIS AREA. AMS
Special weather statement, Apr 15, 11:20 PM CDT, 37 minutes before
ILZ069-070-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085- 099-161015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1120 PM CDT WED APR 15 1998 ...TORNADO WATCH 221 IN EFFECT FOR FOUR COUNTIES IN ST LOUIS AREA OF RESPONSIBILITY IN SOUTHEAST MISSOURI UNTIL 400 AM CDT... ...TWO TORNADO WATCHES WHICH WERE IN EFFECT FOR MUCH OF CENTRAL SOUTHERN AND SOUTHEASTERN MISSOURI UNTIL 1100 PM CDT HAVE NOW EXPIRED AND SEVERE WEATHER IS NO LONGER A THREAT IN THOSE AREAS... THE NEW TORNADO WATCH ONLY INCLUDES RANDOLPH COUNTY IN SOUTHWEST ILLINOIS IN THE ST LOUIS AREA OF RESPONSIBILITY...AND STE. GENEVIEVE...ST. FRANCOIS...AND MADISON COUNTIES IN SOUTHEAST MISSOURI IN THE ST LOUIS AREA OF RESPONSIBILITY. PEDIGO
Special weather statement, Apr 15, 11:20 PM CDT, 37 minutes before
ILZ069-070-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085- 099-161015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1120 PM CDT WED APR 15 1998 ...TORNADO WATCH 221 IN EFFECT FOR FOUR COUNTIES IN ST LOUIS AREA OF RESPONSIBILITY IN SOUTHEAST MISSOURI UNTIL 400 AM CDT... ...TWO TORNADO WATCHES WHICH WERE IN EFFECT FOR MUCH OF CENTRAL SOUTHERN AND SOUTHEASTERN MISSOURI UNTIL 1100 PM CDT HAVE NOW EXPIRED AND SEVERE WEATHER IS NO LONGER A THREAT IN THOSE AREAS... THE NEW TORNADO WATCH ONLY INCLUDES RANDOLPH COUNTY IN SOUTHWEST ILLINOIS IN THE ST LOUIS AREA OF RESPONSIBILITY...AND STE. GENEVIEVE...ST. FRANCOIS...AND MADISON COUNTIES IN SOUTHEAST MISSOURI IN THE ST LOUIS AREA OF RESPONSIBILITY. PEDIGO
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 8:30 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 50 min |
| Apr 15, 8:39 PM CDT | Tornado Warning | LSX | Madison | 51 min |
| Apr 15, 8:49 PM CDT | Severe Thunderstorm Warning | LSX | Iron | 46 min |
| Apr 15, 9:19 PM CDT | Tornado Warning | LSX | Madison | 46 min |
| Apr 15, 9:22 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 63 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.