Alert archive / Missouri / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 25, 1993, 12:45 AM CDT for Washington County, Missouri. It was in force for 45 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 25, 1993, 12:45 AM CDT (05:45 UTC)
- Expired
- Apr 25, 1993, 1:30 AM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, MO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 25, 12:55 AM CDT | Tornado F1 | Potosi, MO | A small tornado initially touched down near the intersection of Highway P and State Road 8, damaging a door and windows of a large garage. The tornado then traveled across a city park damaging several trees, sections of a chain-linked fence, and several adver |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 5.8 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
- 158 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 1187 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:23 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln | 26 min |
| Apr 24, 9:22 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Warren | 38 min |
| Apr 24, 10:23 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 37 min |
| Apr 24, 10:37 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 53 min |
| Apr 25, 12:28 AM CDT | Severe Thunderstorm Warning | LSX | Crawford | 35 min |
| Apr 25, 12:38 AM CDT | Severe Thunderstorm Warning | LSX | Dent, Reynolds | 52 min |
| Apr 25, 12:41 AM CDT | Severe Thunderstorm Warning | LSX | Saint Francois, Washington | 49 min |
| Apr 25, 12:59 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 46 min |
| Apr 25, 1:14 AM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 33 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1993Every severe thunderstorm warning in 1993
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.