Alert archive / Missouri / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 99, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 20, 2000, 4:02 AM CDT for Washington County, Missouri. It was in force for 63 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 20, 2000, 4:02 AM CDT (09:02 UTC)
- Expired
- Apr 20, 2000, 5:05 AM CDT
- In force
- 63 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, MO
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 20, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 9.0 hours before the alert went out and 284 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
- 1428 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 1062 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 12.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLSX 200903 SVRSTL MOC071-219-221-201005- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 402 AM CDT THU APR 20 2000 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... FRANKLIN COUNTY IN EAST CENTRAL MISSOURI WARREN COUNTY IN EAST CENTRAL MISSOURI WASHINGTON COUNTY IN EAST CENTRAL MISSOURI * UNTIL 505 AM CDT * AT 400 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 10 MILES SOUTHWEST OF MONTGOMERY CITY TO SULLIVAN... MOVING NORTHEAST AT 60 MPH. * LOCATIONS THAT WILL BE AFFECTED... WARRENTON WRIGHT CITY WASHINGTON ST CLAIR POTOSI THIS STORM HAS A HISTORY OF DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. WDB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 7:00 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 35 min |
| Apr 19, 8:01 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 34 min |
| Apr 19, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 19 min |
| Apr 19, 8:57 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 33 min |
| Apr 20, 3:21 AM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 54 min |
| Apr 20, 3:38 AM CDT | Severe Thunderstorm Warning | LSX | Crawford, Gasconade | 52 min |
| Apr 20, 3:50 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 65 min |
| Apr 20, 3:53 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery | 47 min |
| Apr 20, 4:02 AM CDT | Severe Thunderstorm Warning | LSX | Franklin, Warren | 63 min |
| Apr 20, 4:16 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 64 min |
| Apr 20, 4:20 AM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 50 min |
| Apr 20, 4:20 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 50 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2000Every severe thunderstorm warning in 2000
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.