Alert archive / Oklahoma / Flash Flood Warnings in 2019

Flash Flood Warning 21, NWS Norman, OK

May 5, 2019Alfalfa County, Oklahoma

NWS Norman, OK issued this flash flood warning at May 5, 2019, 9:32 PM CDT for Alfalfa County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 5, 2019, 9:32 PM CDT (02:32 UTC)
Expired
May 6, 2019, 12:30 AM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Storm-based polygon
Flood severity
None

County Alfalfa County, OK

The radar

The Vance AFB radar (KVNX), 27 km from the middle of the area, began a volume at 02:32 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, 2.5 hours before the alert went out and 172 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 2019-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 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 2019-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939587897Sfc1 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
56 J/kg
Mixed-layer CIN
-204 J/kg
Mixed-layer LCL
2431 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

250 
WGUS54 KOUN 060232
FFWOUN
OKC003-060530-
/O.NEW.KOUN.FF.W.0021.190506T0232Z-190506T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
932 PM CDT Sun May 5 2019

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  West central Alfalfa County in northwestern Oklahoma...

* Until 1230 AM CDT.
  
* At 932 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is occurring or is imminent.

* Some locations that will experience flooding include...
  Cherokee and Ingersoll. 

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3669 9854 3683 9854 3683 9830 3674 9831
      3674 9836

$$

WR

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 8:11 PM CDTSpecial Weather StatementOUNAlfalfa, Woods34 min
May 5, 8:27 PM CDTSpecial Weather StatementOUNMajor33 min
May 5, 8:30 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods30 min
May 5, 8:37 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods23 min
May 5, 8:48 PM CDTSpecial Weather StatementOUNHarmon27 min
May 5, 8:53 PM CDTSevere Thunderstorm WarningOUNAlfalfa52 min
May 5, 8:56 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods49 min
May 5, 9:15 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant30 min
May 5, 9:17 PM CDTSevere Thunderstorm WarningOUNGrant, Kay28 min
May 5, 9:21 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant39 min
May 5, 9:34 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Woods41 min
May 5, 9:39 PM CDTAreal Flood AdvisoryOUNWoods3 hr
May 5, 9:52 PM CDTSpecial Weather StatementOUNWashita38 min
May 5, 9:54 PM CDTSpecial Weather StatementOUNKingfisher36 min
May 5, 10:02 PM CDTSevere Thunderstorm WarningOUNKay43 min
May 5, 10:10 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Kay, Noble, Woods50 min
May 5, 10:15 PM CDTSpecial Weather StatementOUNCanadian30 min
May 5, 10:16 PM CDTAreal Flood AdvisoryOUNAlfalfa, Garfield, Grant, Kay, Noble3 hr
May 5, 10:21 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Major39 min
May 5, 10:27 PM CDTSpecial Weather StatementOUNKingfisher33 min
May 5, 10:37 PM CDTSevere Thunderstorm WarningOUNCanadian38 min
May 5, 10:39 PM CDTSevere Thunderstorm WarningOUNKay51 min
May 5, 10:44 PM CDTSevere Thunderstorm WarningOUNGarfield, Major46 min
May 5, 10:55 PM CDTSpecial Weather StatementOUNWashita35 min
May 5, 11:05 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Kingfisher, Logan, Noble40 min
May 5, 11:08 PM CDTSevere Thunderstorm WarningOUNCanadian, Grady52 min
May 5, 11:08 PM CDTSevere Thunderstorm WarningOUNCaddo, Custer, Washita52 min
May 5, 11:14 PM CDTSevere Thunderstorm WarningOUNCanadian24 min
May 5, 11:17 PM CDTSpecial Weather StatementOUNLogan28 min
May 5, 11:35 PM CDTSevere Thunderstorm WarningOUNGarfield, Logan, Noble, Payne40 min
May 5, 11:48 PM CDTTornado WarningOUNNoble42 min
May 5, 11:56 PM CDTSpecial Weather StatementOUNCaddo34 min
May 5, 11:59 PM CDTSpecial Weather StatementOUNKingfisher31 min
May 6, 12:04 AM CDTSevere Thunderstorm WarningOUNLincoln, Logan, Noble, Oklahoma, Payne41 min
May 6, 12:14 AM CDTAreal Flood AdvisoryOUNGarfield, Noble, Payne3 hr
May 6, 12:19 AM CDTSevere Thunderstorm WarningOUNCleveland, Grady, McClain41 min
May 6, 12:41 AM CDTSevere Thunderstorm WarningOUNLincoln, Payne35 min
May 6, 12:47 AM CDTSpecial Weather StatementOUNOklahoma28 min
May 6, 12:50 AM CDTSevere Thunderstorm WarningOUNOklahoma40 min
May 6, 12:53 AM CDTSevere Thunderstorm WarningOUNCleveland, McClain52 min
May 6, 1:23 AM CDTAreal Flood AdvisoryOUNGarfield, Grant, Kay, Noble112 min
May 6, 1:26 AM CDTSevere Thunderstorm WarningOUNCleveland, Pottawatomie49 min
May 6, 1:43 AM CDTSpecial Weather StatementOUNOkfuskee32 min
May 6, 1:59 AM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole23 min
May 6, 2:03 AM CDTSpecial Weather StatementOUNSeminole27 min
May 6, 2:26 AM CDTSpecial Weather StatementOUNSeminole34 min
May 6, 2:50 AM CDTSpecial Weather StatementOUNHughes25 min

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.