Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 171, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 1990, 3:43 AM CDT for Okfuskee County, Oklahoma. It was in force for 62 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 27, 1990, 3:43 AM CDT (08:43 UTC)
- Expired
- May 27, 1990, 4:45 AM CDT
- In force
- 62 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Okfuskee County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 3:55 AM CDT | Hail 0.75 | Okfuskee, 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
Norman, OK (KOUN), launched 00:00Z, 8.7 hours before the alert went out and 101 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
- 3596 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 4.5
- Supercell composite
- 18.2
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
Local storm report, May 26, 11:51 PM CDT, 3 hours 52 minutes before
STORM REPORT NATIONAL WEATHER SERVICE TULSA, OK 1150 PM CDT SAT MAY 26 1990 TIME/CDT COUNTY EVENT 2245 PM CREEK DIME SIZE HAIL AT JUST SOUTH OF BRISTOW 2300 PM OKMULGEE DIME SI?ZE HAIL NORTHWEST OF HENRYETTA
Local storm report, May 27, 1:02 AM CDT, 2 hours 41 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1256 AM CDT SUN MAY 27 1990
TIME/CDT COUNTY EVENT
12 30 AM PITTSBURG WINDS TO 60 MPH BLEW TREES DOWN 12 MILES EAST
OF MLC ON SH31.
12 25 AM MCINTOSH WINDS TO 60 MPH IN EUFAULA.
12 35 AM HASKELL WINDS TO 60 MPH IN WHITEFIELD.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 10:15 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 45 min |
| May 26, 10:31 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 44 min |
| May 27, 12:13 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 47 min |
| May 27, 12:28 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 47 min |
| May 27, 12:56 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 64 min |
| May 27, 4:08 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 67 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm warning in 1990
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.