Alert archive / Oklahoma / Flash Flood Warnings in 2010

Flash Flood Warning 25, NWS Norman, OK

July 8, 2010Greer County, Harmon County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 8, 2010, 8:38 AM CDT for Greer County, Harmon 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 counties it named.

The facts

Issued
Jul 8, 2010, 8:38 AM CDT (13:38 UTC)
Expired
Jul 8, 2010, 11:30 AM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Storm-based polygon
Flood severity
None

Counties Greer County, OK, Harmon County, OK

The radar

The Altus AFB radar (KFDR), 85 km from the middle of the area, began a volume at 13:40 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 12:00Z, 1.6 hours before the alert went out and 214 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 2010-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 929 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 2010-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
929 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
489 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this flash flood warning went out at Jul 8, 4:17 AM CDT, 4 hours 21 minutes earlier.

Area forecast discussion, Jul 8, 4:17 AM CDT, 4 hours 21 minutes before
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Hazardous weather outlook, Jul 8, 4:55 AM CDT, 3 hours 43 minutes before
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In the hours before

Special weather statement, Jul 8, 5:42 AM CDT, 2 hours 56 minutes before
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Special weather statement, Jul 8, 5:49 AM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
549 AM CDT THU JUL 8 2010

OKZ035-036-081115-
JACKSON OK-KIOWA OK-
549 AM CDT THU JUL 8 2010

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR NORTHEAST JACKSON AND
WESTERN KIOWA COUNTIES.

AT 546 AM CDT...SHOWERS AND ISOLATED THUNDERSTORMS EXTENDING FROM
LONE WOLF TO JUST WEST OF SNYDER WERE PRODUCING MODERATE TO HEAVY
RAINFALL RATES UP TO NEAR ONE INCH PER HOUR. THE ACTIVITY WAS
SHOWING LITTLE MOVEMENT.

HAZARDS INCLUDE...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LAT...LON 3506 9913 3460 9892 3461 9900 3464 9900
      3464 9908 3462 9908 3464 9921 3481 9928
      3482 9924 3485 9930 3489 9932 3490 9929
      3492 9929 3496 9933 3499 9933

CJS
Special weather statement, Jul 8, 5:52 AM CDT, 2 hours 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
552 AM CDT THU JUL 8 2010

TXZ083-084-081115-
HARDEMAN TX-FOARD TX-
552 AM CDT THU JUL 8 2010

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR NORTHERN FOARD AND HARDEMAN
COUNTIES.

AT 550 AM CDT...SHOWERS AND ISOLATED THUNDERSTORMS OVER HARDEMAN AND
NORTHERN FOARD COUNTIES... INCLUDING THE QUANAH AREA... WERE
PRODUCING MODERATE TO HEAVY RAINFALL RATES UP TO ONE INCH PER HOUR.
THE ACTIVITY WAS MOVING SLOWLY TO THE NORTH.

HAZARDS INCLUDE...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LAT...LON 3424 10002 3426 10000 3434 10001 3449 9998
      3429 9957 3398 9966 3402 10006

CJS
Special weather statement, Jul 8, 6:31 AM CDT, 2 hours 7 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 3:58 AM CDTRiver Flood WarningOUNGreer, Jackson10 hr
Jul 8, 9:34 AM CDTAreal Flood AdvisoryOUNBeckham, Ellis, Roger Mills3 hr
Jul 8, 12:31 PM CDTAreal Flood AdvisoryOUNCarter, Johnston, Love, Marshall3 hr
Jul 8, 1:16 PM CDTAreal Flood WarningOUNBeckham, Roger Mills6 hr
Jul 8, 3:05 PM CDTAreal Flood AdvisoryOUNGrady, McClain3 hr
Jul 8, 4:39 PM CDTAreal Flood AdvisoryOUNComanche, Cotton, Jefferson, Stephens3 hr
Jul 8, 5:05 PM CDTAreal Flood AdvisoryOUNCleveland, Garvin, McClain, Pontotoc, Pottawatomie, Seminole3 hr
Jul 8, 5:36 PM CDTAreal Flood AdvisoryOUNCleveland, Grady, Lincoln, Logan, McClain, Oklahoma and 2 more3 hr
Jul 8, 5:50 PM CDTFlash Flood WarningOUNCleveland, Grady, McClain, Oklahoma4 hr
Jul 8, 6:05 PM CDTAreal Flood AdvisoryOUNLincoln, Payne3 hr
Jul 7, 7:28 PM CDTAreal Flood AdvisoryOUNArcher, Baylor, Foard, Knox3 hr
Jul 8, 8:03 AM CDTAreal Flood AdvisoryOUNFoard, Hardeman, Knox3 hr
Jul 8, 8:24 AM CDTFlash Flood WarningOUNFoard, Hardeman4 hr
Jul 8, 8:53 AM CDTFlash Flood WarningOUNKnox3 hr
Jul 8, 9:16 AM CDTAreal Flood AdvisoryOUNBaylor3 hr
Jul 8, 11:41 AM CDTFlash Flood WarningOUNBaylor, Knox4 hr
Jul 8, 12:19 PM CDTAreal Flood WarningOUNBaylor, Foard, Hardeman, Knox, Wilbarger6 hr

Nearby

Flash Flood Warnings in Oklahoma, 2010Every 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.