Alert archive / Oklahoma / Flash Flood Warnings in 1991

Flash Flood Warning 18, NWS Norman, OK

June 5, 1991Grady County, Stephens County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 5, 1991, 5:34 PM CDT for Grady County, Stephens County, Oklahoma. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 5, 1991, 5:34 PM CDT (22:34 UTC)
Expired
Jun 5, 1991, 8:30 PM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Whole counties

Counties Grady County, OK, Stephens County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.6 hours before the alert went out and 67 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 1991-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3452 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 1991-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 square meters per square second.1939Sfc1 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
3452 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
1.5
Supercell composite
9.6

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 4, 7:00 PM CDTSevere Thunderstorm WarningOUNDewey60 min
Jun 4, 7:28 PM CDTSevere Thunderstorm WarningOUNMajor, Woodward62 min
Jun 4, 7:59 PM CDTSevere Thunderstorm WarningOUNDewey61 min
Jun 4, 8:04 PM CDTSevere Thunderstorm WarningOUNAlfalfa56 min
Jun 4, 8:39 PM CDTSevere Thunderstorm WarningOUNGrant66 min
Jun 4, 8:55 PM CDTSevere Thunderstorm WarningOUNDewey65 min
Jun 4, 9:14 PM CDTSevere Thunderstorm WarningOUNBeckham61 min
Jun 5, 9:42 AM CDTSevere Thunderstorm WarningOUNLincoln48 min
Jun 5, 10:25 AM CDTSevere Thunderstorm WarningOUNLincoln50 min
Jun 5, 10:43 AM CDTSevere Thunderstorm WarningOUNOklahoma62 min
Jun 5, 10:57 AM CDTSevere Thunderstorm WarningOUNCanadian63 min
Jun 5, 11:11 AM CDTSevere Thunderstorm WarningOUNCleveland49 min
Jun 5, 11:48 AM CDTSevere Thunderstorm WarningOUNOklahoma42 min
Jun 5, 11:58 AM CDTSevere Thunderstorm WarningOUNCleveland62 min
Jun 5, 12:16 PM CDTSevere Thunderstorm WarningOUNPottawatomie44 min
Jun 5, 12:46 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal59 min
Jun 5, 12:53 PM CDTTornado WarningOUNAtoka37 min
Jun 5, 12:59 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain61 min
Jun 5, 1:04 PM CDTSevere Thunderstorm WarningOUNGarvin, Murray56 min
Jun 5, 1:14 PM CDTSevere Thunderstorm WarningOUNGrady46 min
Jun 5, 1:21 PM CDTSevere Thunderstorm WarningOUNBryan, Choctaw69 min
Jun 5, 1:21 PM CDTSevere Thunderstorm WarningOUNPushmataha69 min
Jun 5, 1:30 PM CDTTornado WarningOUNAtoka, Choctaw30 min
Jun 5, 1:41 PM CDTSevere Thunderstorm WarningOUNLove, Marshall49 min
Jun 5, 1:58 PM CDTSevere Thunderstorm WarningOUNGarvin, Grady62 min
Jun 5, 2:58 PM CDTSevere Thunderstorm WarningOUNComanche, Grady, Stephens62 min
Jun 5, 4:42 PM CDTSevere Thunderstorm WarningOUNCaddo33 min
Jun 5, 6:10 PM CDTSevere Thunderstorm WarningOUNWashita65 min

Nearby

Flash Flood Warnings in Oklahoma, 1991Every flash flood 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; the sounding from the Mesonet's radiosonde archive.