Alert archive / Missouri / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 120, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 21, 1997, 7:39 PM CDT for Washington County, Missouri. It was in force for 51 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
- Jun 21, 1997, 7:39 PM CDT (00:39 UTC)
- Expired
- Jun 21, 1997, 8:30 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, MO
The radar
The St Louis radar (KLSX), 84 km from the middle of the area, began a volume at 00:38 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 |
|---|---|---|---|
| Jun 21, 8:12 PM CDT | Thunderstorm Wind 52 | Old Mines, MO | County sheriff reported trees down. |
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
Springfield, MO (KSGF), launched 00:00Z, 0.7 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
- 2170 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1326 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
789 WUUS1 KSTL 220040 RRA SVRSTL MOC221-220130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 739 PM CDT SAT JUN 21 1997 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL MISSOURI ...WASHINGTON COUNTY AT 739 PM...NATIONAL WEATHER SEVICE DOPPLER RADAR DETECTED SEVERE THUNDERSTORMS EXTENDING FROM ANTHONIES MILLS THROUGH OLD MINES. IT WAS MOVING TO THE SOUTHEAST AT 10 MPH. TOWNS IN THE PATH ARE OLD MINES... POTOSI AND RICHWOODS. THIS IS A DANGEROUS STORM BE PREPARED FOR DAMAGING WINDS...HAIL AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS. GKS/RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 44 min |
| Jun 21, 10:22 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 68 min |
| Jun 21, 11:45 PM CDT | Flash Flood Warning | LSX | Crawford, Franklin, Jefferson, Washington | 5 hr |
| Jun 22, 12:48 AM CDT | Flash Flood Warning | LSX | Warren | 4 hr |
| Jun 22, 1:15 AM CDT | Flash Flood Warning | LSX | Montgomery | 4 hr |
| Jun 22, 2:49 AM CDT | Flash Flood Warning | LSX | Callaway | 3 hr |
| Jun 22, 3:44 AM CDT | Flash Flood Warning | LSX | Audrain | 3 hr |
| Jun 22, 4:50 AM CDT | Flash Flood Warning | LSX | Audrain, Callaway, Monroe, Montgomery | 4 hr |
| Jun 22, 4:50 AM CDT | Flash Flood Warning | LSX | Crawford, Gasconade | 4 hr |
| Jun 22, 5:41 AM CDT | Flash Flood Warning | LSX | Boone | 3 hr |
| Jun 22, 7:05 AM CDT | Flash Flood Warning | LSX | Shelby | 4 hr |
| Jun 22, 7:36 AM CDT | Flash Flood Warning | LSX | Knox | 3 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 1997Every severe thunderstorm warning in 1997
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.