Alert archive / Missouri / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 39, NWS Springfield, MO
NWS Springfield, MO issued this severe thunderstorm warning at May 4, 1991, 8:47 PM CDT for Vernon County, Missouri. It was in force for 28 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 4, 1991, 8:47 PM CDT (01:47 UTC)
- Expired
- May 4, 1991, 9:15 PM CDT
- In force
- 28 min
- Issued by
- NWS Springfield, MO
- Area
- Whole counties
County Vernon County, MO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 4, 8:50 PM CDT | Thunderstorm Wind 52 | Vernon, 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
Springfield, MO (KUMN), launched 00:00Z, 1.8 hours before the alert went out and 116 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
- 2434 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1078 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 8.6
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 4, 6:58 PM CDT, 1 hour 49 minutes before
MOZ015-016-019-020-021-050045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD MO 655 PM CDT SAT MAY 4 1991 ...A TORNADO WATCH IS IN EFFECT UNTIL MIDNIGHT FOR MUCH OF SOUTHWEST MISSOURI... RADAR AT 650 PM SHOWED NUMEROUS THUNDERSTORMS OVER NORTHEAST OKLAHOMA AND SOUTHEAST KANSAS. THE STORMS WERE MOVING NORTHEAST 35 MPH. THE THUNDERSTORMS HAD ENTERED WEST CENTRAL MISSOURI NORTH OF VERNON COUNTY. THE THUNDERSTORMS OVER NORTHEA*ST OKLAHOMA WILL MOVE INTO THE SOUTHWEST PART OF MISSOURI BY 800 PM. TORNADO WATCH NUMBER 276 IS IN EFFECT UNTIL MIDNIGHT FOR MUCH OF SOUTHWEST MISSOURI INCLUDING THE CITIES OF JOPLIN AND SPRINGFIELD. LEE
The office that day
Everything else NWS Springfield, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:50 PM CDT | Severe Thunderstorm Warning | SGF | McDonald | 55 min |
| May 4, 7:50 PM CDT | Severe Thunderstorm Warning | SGF | Vernon | 55 min |
| May 4, 8:47 PM CDT | Severe Thunderstorm Warning | SGF | McDonald | 58 min |
| May 4, 9:45 PM CDT | Severe Thunderstorm Warning | SGF | McDonald, Newton | 60 min |
| May 4, 9:45 PM CDT | Severe Thunderstorm Warning | SGF | Barton, Jasper | 60 min |
| May 4, 10:17 PM CDT | Severe Thunderstorm Warning | SGF | Dade, Lawrence | 58 min |
| May 4, 10:17 PM CDT | Severe Thunderstorm Warning | SGF | Polk | 58 min |
| May 4, 10:19 PM CDT | Severe Thunderstorm Warning | SGF | Dade, Lawrence | 56 min |
| May 4, 10:19 PM CDT | Severe Thunderstorm Warning | SGF | Polk | 56 min |
| May 4, 11:34 PM CDT | Severe Thunderstorm Warning | SGF | Greene | 56 min |
| May 5, 12:06 AM CDT | Severe Thunderstorm Warning | SGF | Douglas | 19 min |
| May 5, 12:06 AM CDT | Severe Thunderstorm Warning | SGF | Dallas, Webster | 69 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.