Alert archive / Missouri / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 38, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 17, 1991, 4:46 PM CDT for Schuyler County, Scotland County, Missouri. It was in force for 59 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
- May 17, 1991, 4:46 PM CDT (21:46 UTC)
- Expired
- May 17, 1991, 5:45 PM CDT
- In force
- 59 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Schuyler County, MO, Scotland County, MO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 17, 5:45 PM CDT | Tornado F0 | Scotland, MO |
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
Topeka, KS (KTOP), launched 12:00Z, 9.8 hours before the alert went out and 326 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
- 1042 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 722 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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, May 17, 12:00 PM CDT, 4 hours 46 minutes before
MOZALL-171910- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1201 PM CDT FRI MAY 17 1991 ...SEVERE THUNDERSTORMS AND HEAVY RAIN POSSIBLE IN THE ST. LOUIS AREA LATE THIS AFTERNOON AND TONIGHT... CONDITIONS ARE RIPE FOR THE POSSIBILITY OF SEVERE THUNDERSTORM DEVELOPMENT OVER CENTRAL MISSOURI LATE THIS AFTERNOON AND TONIGHT. IN ADDITION...SOME STORMS MAY PRODUCE LOCALLY HEAVY RAIN DUE TO THE VERY MOIST AIR OVER THE AREA. IF YOU LIVE NEAR LOW LYING AREAS...CREEKS...OR STREAMS IN THE ST. LOUIS METRO AREA...STAY ALERT TONIGHT. IF HEAVY RAINS MOVE INTO YOUR AREA...FLOODING OF LOW LYING AREAS...CREEKS...AND UNDERPASSES MAY OCCUR. DO NOT DRIVE THROUGH FLOODING ROADS. STAY TUNED TO LOCAL TV BROADCASTS OR NOAA WEATHER RADIO FOR THE LATEST STATEMENTS ON THIS WEATHER SITUATION. GOETSCH
Special weather statement, May 17, 3:57 PM CDT, 49 minutes before
MOZ001>003-005>007-172200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 355 PM CDT FRI MAY 17 1991 ...A TORNADO WATCH IS IN EFFECT FOR NORTH CENTRAL AND NORTHEAST MISSOURI TILL 9 PM... AT 345 PM...THUNDERSTERSTORMS WERE OCCURRING OVER NORTH CENTRAL MISSOURI. THE STRONGEST STORM WAS NORTHEAST OF TRENTON. THE STORM WAS MOVING NORTHEAST AT 25 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THIS PART OF MISSOURI LATE THIS AFTERNOON AND THIS EVENING. SOME OF THESE STORMS WILL REACH SEVERE LIMITS AND MAY ALSO PRODUCE TORNADOES. IF YOU ARE IN NORTHEAST AND NORTH CENTRAL MISSOURI...OR ARE PLANNING TO TRAVEL INTO THIS AREA...MONITOR THE WEATHER CONDITIONS CLOSELY BY LISTENING TO NOAA WEATHER RADIO AND LOCAL RADIO AND T.V. STATIONS. BE PREPARED TO TAKE IMMEDIATE ACTION IN THE EVENT THAT SEVERE WEATHER DEVELOPES. FERRY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 3:58 PM CDT | Severe Thunderstorm Warning | LSX | Schuyler | 47 min |
| May 17, 5:42 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 63 min |
| May 17, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Clark, Scotland | 56 min |
| May 17, 6:39 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 51 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1991Every severe thunderstorm warning in 1991
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.