Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 63, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 17, 1991, 6:59 PM CDT for Mayes County, Oklahoma. It was in force for 46 min. 2 reports 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 17, 1991, 6:59 PM CDT (23:59 UTC)
- Expired
- Apr 17, 1991, 7:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Mayes County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 17, 7:05 PM CDT | Thunderstorm Wind 0 | Mayes, OK | |
| Apr 17, 7:15 PM CDT | Thunderstorm Wind 0 | Mayes, OK |
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, 12.0 hours before the alert went out and 302 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.2
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, Apr 17, 3:06 PM CDT, 3 hours 53 minutes before
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</html>The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 4:25 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 65 min |
| Apr 17, 5:29 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 61 min |
| Apr 17, 6:04 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 26 min |
| Apr 17, 3:24 PM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 66 min |
| Apr 17, 3:24 PM CDT | Severe Thunderstorm Warning | TSA | Polk | 66 min |
| Apr 17, 3:38 PM CDT | Severe Thunderstorm Warning | TSA | Scott | 67 min |
| Apr 17, 4:18 PM CDT | Severe Thunderstorm Warning | TSA | Franklin, Logan | 57 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.