Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 298, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 3, 1998, 11:40 PM CDT for Knox 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
- Jul 3, 1998, 11:40 PM CDT (04:40 UTC)
- Expired
- Jul 4, 1998, 12:45 AM CDT
- In force
- 65 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Knox County, MO
The radar
The St Louis radar (KLSX), 203 km from the middle of the area, began a volume at 04:40 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, 4.7 hours before the alert went out and 216 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
- 1700 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1022 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
012 WUUS1 KSTL 040441 RRA SVRSTL MOC103-040545- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1140 PM CDT FRI JUL 3 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... KNOX COUNTY IN NORTHEASTERN MISSOURI * UNTIL 1245 AM CDT * AT AT 1135 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR HURDLAND... MOVING EAST-SOUTHEAST AT 25 MPH. * LOCATIONS THAT WILL BE AFFECTED... HURDLAND EDINA KNOX CITY SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. AMS
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
Local storm report, Jul 3, 6:33 PM CDT, 5 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
633 PM CDT FRI JUL 03 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0430 PM ST LOUIS MO .75 INCH HAIL
07/03/98 ST LOUIS CITY MARBLE SIZE HAIL IN
DOWNTOWN ST. LOUIS
0438 PM ST LOUIS MO WIND DAMAGE
07/03/98 ST LOUIS CITY 1/2 MILE SOUTH OF DOWNTOWN
ST. LOUIS, ESTIMATED 50-60
MPH WIND. LARGE TREE
BRANCHES AND BILLBOARDS
BLOWN DOWN.
0438 PM ST LOUIS MO .88 INCH HAIL
07/03/98 ST LOUIS CITY 1/2 MILE SOUTH OF DOWNTOWN
0445 PM ST LOUIS MO WIND DAMAGE
07/03/98 ST LOUIS CITY TIME ESTIMATED BETWEEN 445
AND 500 PM. WINDOWS BROKEN
IN SEVERAL CARS. DAMAGE
MAY HAVE ALSO BEEN DUE TO
HAIL.
0455 PM CAHOKIA IL WIND DAMAGE
07/03/98 ST CLAIR TREE DOWN ACROSS HWY 157
NEAR CAHOKIA
04525 PM CAHOKIA IL .75 INCH HAIL
07/03/98 ST CLAIR REPORTED AT PARKS AIRPORT
AMSLocal storm report, Jul 3, 6:33 PM CDT, 5 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
633 PM CDT FRI JUL 03 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0430 PM ST LOUIS MO .75 INCH HAIL
07/03/98 ST LOUIS CITY MARBLE SIZE HAIL IN
DOWNTOWN ST. LOUIS
0438 PM ST LOUIS MO WIND DAMAGE
07/03/98 ST LOUIS CITY 1/2 MILE SOUTH OF DOWNTOWN
ST. LOUIS, ESTIMATED 50-60
MPH WIND. LARGE TREE
BRANCHES AND BILLBOARDS
BLOWN DOWN.
0438 PM ST LOUIS MO .88 INCH HAIL
07/03/98 ST LOUIS CITY 1/2 MILE SOUTH OF DOWNTOWN
0445 PM ST LOUIS MO WIND DAMAGE
07/03/98 ST LOUIS CITY TIME ESTIMATED BETWEEN 445
AND 500 PM. WINDOWS BROKEN
IN SEVERAL CARS. DAMAGE
MAY HAVE ALSO BEEN DUE TO
HAIL.
0455 PM CAHOKIA IL WIND DAMAGE
07/03/98 ST CLAIR TREE DOWN ACROSS HWY 157
NEAR CAHOKIA
04525 PM CAHOKIA IL .75 INCH HAIL
07/03/98 ST CLAIR REPORTED AT PARKS AIRPORT
AMSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 2:36 AM CDT | Flash Flood Warning | LSX | Marion, Monroe, Ralls, Shelby | 5 hr |
| Jul 4, 2:36 AM CDT | Flash Flood Warning | LSX | Pike | 5 hr |
| Jul 4, 2:36 AM CDT | Flash Flood Warning | LSX | Knox | 5 hr |
| Jul 4, 7:38 AM CDT | Flash Flood Warning | LSX | Audrain, Monroe | 3 hr |
| Jul 4, 7:38 AM CDT | Flash Flood Warning | LSX | Knox, Shelby | 3 hr |
| Jul 4, 7:38 AM CDT | Flash Flood Warning | LSX | Audrain, Monroe | 3 hr |
| Jul 4, 7:38 AM CDT | Flash Flood Warning | LSX | Knox, Shelby | 3 hr |
| Jul 4, 9:02 AM CDT | Flash Flood Warning | LSX | Callaway, Cole, Osage | 5 hr |
| Jul 4, 9:02 AM CDT | Flash Flood Warning | LSX | Boone, Moniteau | 5 hr |
| Jul 4, 11:04 AM CDT | Flash Flood Warning | LSX | Monroe, Shelby | 3 hr |
| Jul 4, 11:04 AM CDT | Flash Flood Warning | LSX | Audrain | 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.