Alert archive / Oklahoma / Flash Flood Warnings in 2019

Flash Flood Warning 135, NWS Norman, OK

August 24, 2019Harper County, Oklahoma

NWS Norman, OK issued this flash flood warning at Aug 24, 2019, 1:31 AM CDT for Harper County, Oklahoma. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 24, 2019, 1:31 AM CDT (06:31 UTC)
Expired
Aug 24, 2019, 3:30 AM CDT
In force
119 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Flood severity
None

County Harper County, OK

The radar

The Dodge City radar (KDDC), 111 km from the middle of the area, began a volume at 06:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 6.5 hours before the alert went out and 111 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, Dodge City, at 00:00Z on 2019-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 340 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, Dodge City, at 00:00Z on 2019-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 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
340 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1000 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
381 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 8:27 PM CDTSpecial Weather StatementOUNHarper33 min
Aug 23, 9:37 PM CDTSpecial Weather StatementOUNEllis23 min
Aug 23, 10:53 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills43 min
Aug 24, 12:48 AM CDTAreal Flood AdvisoryOUNHarper3 hr
Aug 24, 2:31 AM CDTSpecial Weather StatementOUNHarmon29 min
Aug 24, 3:26 AM CDTAreal Flood WarningOUNHarper5 hr
Aug 24, 1:38 PM CDTSpecial Weather StatementOUNBryan52 min
Aug 24, 3:03 PM CDTFlood WatchOUNAlfalfa, Blaine, Canadian, Cleveland, Custer, Dewey and 16 more22 hr

Nearby

Flash Flood Warnings in Oklahoma, 2019Every flash flood warning in 2019

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; radar from the NEXRAD Level II archive.