Alert archive / Missouri / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 109, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 13, 1993, 3:39 PM CDT for Ralls County, Missouri. It was in force for 51 min.
The area
The counties it named.
The facts
- Issued
- Jul 13, 1993, 3:39 PM CDT (20:39 UTC)
- Expired
- Jul 13, 1993, 4:30 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Ralls County, MO
The radar
The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 20:40 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
Springfield, MO (KUMN), launched 12:00Z, 8.7 hours before the alert went out and 354 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
- 854 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 953 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Jul 13, 3:35 PM CDT, 4 minutes before
MOZALL-140300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 335 PM CDT TUE JUL 13 1993 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PARTS OF CENTRAL AND SOUTHWEST MISSOURI UNTIL 10 PM CDT. SOME OF THE CITIES INCLUDED IN THE WATCH ARE ST LOUIS...HANNIBAL...COLUMBIA AND SPRINGFIELD. AT 330 PM...THUNDERSTORMS WERE OCCURRING FROM NORTHEAST INTO CENTRAL AND SOUTHWEST MISSOURI. THE STRONGEST STORMS WERE LOCATED OVER THE CENTRAL PART OF THE STATE. THE THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR. SOME OF THESE STORMS WILL BECOME SEVERE LATE THIS AFTERNOON AND THIS EVENING. HEAVY RAIN WILL ALSO BE POSSIBLE FROM THESE THUNDERSTORMS WHICH MAY CAUSE FLASH FLOODING. PEOPLE IN SOUTHWEST AND CENTRAL MISSOURI SHOULD KEEP INFORMED OF THE LOCAL WEATHER CONDITIONS AND BE READY TO MOVE TO A SAFE PLACE IF SEVERE WEATHER MOVES INTO YOUR AREA. FERRY
Special weather statement, Jul 13, 3:38 PM CDT, 1 minute before
MOZALL-140300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 335 PM CDT TUE JUL 13 1993 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PARTS OF CENTRAL AND SOUTHWEST MISSOURI UNTIL 10 PM CDT. SOME OF THE CITIES INCLUDED IN THE WATCH ARE ST LOUIS...HANNIBAL...COLUMBIA AND SPRINGFIELD. AT 330 PM...THUNDERSTORMS WERE OCCURRING FROM NORTHEAST INTO CENTRAL AND SOUTHWEST MISSOURI. THE STRONGEST STORMS WERE LOCATED OVER THE CENTRAL PART OF THE STATE. THE THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR. SOME OF THESE STORMS WILL BECOME SEVERE LATE THIS AFTERNOON AND THIS EVENING. HEAVY RAIN WILL ALSO BE POSSIBLE FROM THESE THUNDERSTORMS WHICH MAY CAUSE FLASH FLOODING. PEOPLE IN SOUTHWEST AND CENTRAL MISSOURI SHOULD KEEP INFORMED OF THE LOCAL WEATHER CONDITIONS AND BE READY TO MOVE TO A SAFE PLACE IF SEVERE WEATHER MOVES INTO YOUR AREA. FERRY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 11:45 AM CDT | Flash Flood Warning | LSX | Adair | 3 hr |
| Jul 13, 1:13 PM CDT | Flash Flood Warning | LSX | Marion, Shelby | 4 hr |
| Jul 13, 6:30 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 45 min |
| Jul 13, 6:30 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 23 min |
| Jul 13, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 48 min |
| Jul 13, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.