Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 421, NWS Norman, OK

June 5, 1991Roger Mills County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 5, 1991, 7:45 PM CDT for Roger Mills County, Oklahoma. It was in force for 60 min. 3 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
Jun 5, 1991, 7:45 PM CDT (00:45 UTC)
Expired
Jun 5, 1991, 8:45 PM CDT
In force
60 min
Issued by
NWS Norman, OK
Area
Whole counties

County Roger Mills County, OK

What was reported inside it

TimeReportWhereRemark
Jun 5, 8:00 PM CDTHail 1.25Roger Mills, OK
Jun 5, 8:30 PM CDTHail 0.75Roger Mills, OK
Jun 5, 8:45 PM CDTHail 0.75Roger Mills, 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.8 hours before the alert went out and 189 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, Amarillo Airport, TX at 00:00Z on 1991-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Amarillo Airport, TX at 00:00Z on 1991-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2943 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 5, 7:07 PM CDTSevere Thunderstorm WarningOUNBeckham, Washita68 min
Jun 5, 8:23 PM CDTSevere Thunderstorm WarningOUNGreer67 min
Jun 5, 8:45 PM CDTSevere Thunderstorm WarningOUNRoger Mills45 min
Jun 5, 9:45 PM CDTFlash Flood WarningOUNTillman3 hr

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.