Alert archive / Oklahoma / Flash Flood Warnings in 1987

Flash Flood Warning 37, NWS Norman, OK

September 28, 1987Grant County, Kay County, Oklahoma

NWS Norman, OK issued this flash flood warning at Sep 28, 1987, 1:20 AM CDT for Grant County, Kay County, Oklahoma. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 28, 1987, 1:20 AM CDT (06:20 UTC)
Expired
Sep 28, 1987, 5:00 AM CDT
In force
4 hr
Issued by
NWS Norman, OK
Area
Whole counties

Counties Grant County, OK, Kay County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Ok Cty/Will Rgrs, OK (KOKC), launched 00:00Z, 6.3 hours before the alert went out and 157 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, Ok Cty/Will Rgrs, OK at 00:00Z on 1987-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2538 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, Ok Cty/Will Rgrs, OK at 00:00Z on 1987-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
2538 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
89 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
Sep 27, 8:19 PM CDTSevere Thunderstorm WarningOUNBlaine41 min
Sep 27, 8:52 PM CDTSevere Thunderstorm WarningOUNMajor53 min
Sep 27, 9:10 PM CDTSevere Thunderstorm WarningOUNKay50 min
Sep 27, 10:00 PM CDTSevere Thunderstorm WarningOUNDewey45 min
Sep 27, 10:45 PM CDTFlash Flood WarningOUNKay3 hr
Sep 27, 11:22 PM CDTSevere Thunderstorm WarningOUNEllis38 min
Sep 27, 11:58 PM CDTSevere Thunderstorm WarningOUNEllis47 min
Sep 28, 12:11 AM CDTSevere Thunderstorm WarningOUNWoodward49 min
Sep 28, 1:52 AM CDTSevere Thunderstorm WarningOUNGarfield, Noble68 min
Sep 28, 2:05 AM CDTSevere Thunderstorm WarningOUNDewey, Major55 min
Sep 28, 3:07 AM CDTSevere Thunderstorm WarningOUNGarfield, Major28 min
Sep 28, 3:14 AM CDTSevere Thunderstorm WarningOUNBlaine, Kingfisher21 min
Sep 28, 4:13 AM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher, Logan, Oklahoma47 min
Sep 28, 4:54 AM CDTSevere Thunderstorm WarningOUNLincoln, Oklahoma51 min
Sep 28, 4:54 AM CDTSevere Thunderstorm WarningOUNCleveland51 min

Nearby

Flash Flood Warnings in Oklahoma, 1987Every flash flood warning in 1987

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.