Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 15, NWS Norman, OK

April 24, 1999Custer County, Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 24, 1999, 3:14 PM CDT for Custer County, Oklahoma. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 24, 1999, 3:14 PM CDT (20:14 UTC)
Expired
Apr 24, 1999, 9:15 PM CDT
In force
6 hr
Issued by
NWS Norman, OK
Area
Whole counties

County Custer County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.2 hours before the alert went out and 152 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 1999-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLEL10008507005003002001001 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 1999-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 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
17 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
372 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.2

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
Apr 24, 9:14 AM CDTSevere Thunderstorm WarningOUNGreer46 min
Apr 24, 9:59 AM CDTSevere Thunderstorm WarningOUNBeckham, Greer46 min
Apr 24, 10:23 AM CDTSevere Thunderstorm WarningOUNKiowa, Washita52 min
Apr 24, 11:17 AM CDTSevere Thunderstorm WarningOUNWashita43 min
Apr 24, 11:58 AM CDTSevere Thunderstorm WarningOUNWashita62 min
Apr 24, 1:03 PM CDTSevere Thunderstorm WarningOUNCuster, Washita57 min
Apr 24, 1:27 PM CDTFlash Flood WarningOUNCoal, Hughes6 hr
Apr 24, 1:57 PM CDTSevere Thunderstorm WarningOUNCuster48 min

Nearby

Flash Flood Warnings in Oklahoma, 1999Every flash flood warning in 1999

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.