Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 91, NWS Tulsa, OK

May 4, 1991Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 4, 1991, 5:12 PM CDT for Okfuskee County, Oklahoma. It was in force for 48 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, 5:12 PM CDT (22:12 UTC)
Expired
May 4, 1991, 6:00 PM CDT
In force
48 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Okfuskee County, OK

What was reported inside it

TimeReportWhereRemark
May 4, 5:15 PM CDTThunderstorm Wind 0Okfuskee, 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 12:00Z, 10.2 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.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 12:00Z on 1991-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 880 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 1991-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 172 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
880 J/kg
Mixed-layer CIN
-166 J/kg
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
172 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 7:07 PM CDTSevere Thunderstorm WarningTSAOsage53 min
May 3, 7:57 PM CDTSevere Thunderstorm WarningTSAOsage, Washington48 min
May 3, 8:42 PM CDTSevere Thunderstorm WarningTSANowata48 min
May 3, 9:46 PM CDTSevere Thunderstorm WarningTSAWashington29 min
May 4, 5:09 PM CDTSevere Thunderstorm WarningTSACreek, Okmulgee51 min
May 4, 5:18 PM CDTSevere Thunderstorm WarningTSAOsage, Tulsa42 min
May 4, 6:00 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Wagoner45 min
May 4, 6:00 PM CDTSevere Thunderstorm WarningTSANowata, Washington45 min
May 4, 6:46 PM CDTSevere Thunderstorm WarningTSACraig, Mayes, Rogers44 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.