Alert archive / Oklahoma / Flash Flood Warnings in 2010

Flash Flood Warning 21, NWS Norman, OK

July 7, 20104 counties in Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 7, 2010, 2:59 AM CDT for 4 counties in 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: Jul 7, 2010, 2:59 AM CDT (07:59 UTC)
Expired: Jul 7, 2010, 6:00 AM CDT
In force: 3 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Beckham County, OK, Custer County, OK, Roger Mills County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 134 km from the middle of the area, began a volume at 08:02 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

Norman, OK (KOUN), launched 00:00Z, 8.0 hours before the alert went out and 188 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 662 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

860 
WGUS54 KOUN 070759
FFWOUN
OKC009-039-129-149-071100-
/O.NEW.KOUN.FF.W.0021.100707T0759Z-100707T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
259 AM CDT WED JUL 7 2010

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN BECKHAM COUNTY IN WESTERN OKLAHOMA...
  SOUTHWESTERN CUSTER COUNTY IN WESTERN OKLAHOMA...
  SOUTHEASTERN ROGER MILLS COUNTY IN WESTERN OKLAHOMA...
  NORTHWESTERN WASHITA COUNTY IN WESTERN OKLAHOMA...

* UNTIL 600 AM CDT

* AT 256 AM CDT...VERY HEAVY RAIN WAS CONTINUING TO FALL ACROSS THE 
WARNING AREA... WHICH ALSO INCLUDED INTERSTATE 40 NEAR ELK CITY. 
RADAR INDICATES THAT AT LEAST 2 TO 4 INCHES OF RAINFALL HAS FALLEN 
ALONG AND JUST NORTHWEST OF AN ELK CITY TO SAYRE LINE. 

* LOCATIONS IN THE WARNING INCLUDE BERLIN...CANUTE...ELK CITY...FOSS
  RESERVOIR...FOSS AND STAFFORD.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 25 AND 60.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND STREAMS AND HIGHWAYS. ADDITIONALLY...COUNTRY ROADS AND 
FARM LANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING 
AREAS ARE SUBJECT TO FLASH FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT DRIVE VEHICLES INTO 
AREAS WHERE WATER COVERS THE ROADWAY. THE HEAVY RAIN WILL ALSO CAUSE 
POOR VISIBILITIES.

&&

LAT...LON 3549 9965 3554 9957 3556 9952 3559 9946
      3559 9936 3561 9926 3561 9903 3540 9908
      3530 9960 3537 9969

$$



CJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:38 PM CDT	Areal Flood Advisory	OUN	Caddo, Kiowa, Washita	3 hr
Jul 6, 8:19 PM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	42 hr
Jul 6, 11:20 PM CDT	Areal Flood Advisory	OUN	Beckham, Roger Mills	3 hr
Jul 7, 12:10 AM CDT	Flash Flood Warning	OUN	Beckham	3 hr
Jul 7, 4:12 AM CDT	Flash Flood Watch	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 41 more	72 hr
Jul 7, 5:31 AM CDT	Areal Flood Advisory	OUN	Beckham, Roger Mills	3 hr
Jul 7, 7:10 AM CDT	Areal Flood Advisory	OUN	Kiowa, Washita	3 hr
Jul 7, 10:42 AM CDT	River Flood Warning	OUN	Lincoln, Oklahoma, Pottawatomie	3 hr
Jul 7, 1:36 PM CDT	Areal Flood Advisory	OUN	Atoka	3 hr
Jul 7, 1:50 PM CDT	Areal Flood Advisory	OUN	Caddo, Kiowa	3 hr
Jul 7, 1:50 PM CDT	River Flood Warning	OUN	Cotton	13 hr
Jul 7, 2:17 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Kiowa	4 hr
Jul 7, 2:30 PM CDT	Flash Flood Warning	OUN	Caddo, Canadian	4 hr
Jul 7, 4:06 PM CDT	Areal Flood Advisory	OUN	Garfield	3 hr
Jul 7, 4:32 PM CDT	Areal Flood Advisory	OUN	Tillman	3 hr
Jul 7, 5:29 PM CDT	Areal Flood Advisory	OUN	Kay	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 2010 Every flash flood warning in 2010

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.