Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 81, NWS Fort Worth, TX

September 21, 2009Palo Pinto County, Texas

NWS Fort Worth, TX issued this flash flood warning at Sep 21, 2009, 6:56 PM CDT for Palo Pinto County, Texas. 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: Sep 21, 2009, 6:56 PM CDT (23:56 UTC)
Expired: Sep 21, 2009, 10:00 PM CDT
In force: 3 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

County Palo Pinto County, TX

The radar

The Dyess AFB radar (KDYX), 91 km from the middle of the area, began a volume at 23:58 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, 11.9 hours before the alert went out and 287 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: 2002 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Fort Worth, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 21, 5:33 PM CDT, 1 hour 23 minutes earlier.

Area forecast discussion, Sep 21, 5:33 PM CDT, 1 hour 23 minutes before

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Hazardous weather outlook, Sep 21, 3:18 PM CDT, 3 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
318 PM CDT MON SEP 21 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-221145-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
318 PM CDT MON SEP 21 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THUNDERSTORMS ARE EXPECTED TO DEVELOP NEAR A BOWIE TO BRECKENRIDGE
LINE LATE THIS AFTERNOON...AND THEN BECOME MORE NUMEROUS WHILE
MOVING SOUTHEAST DURING THE EVENING AND OVERNIGHT HOURS AS A COLD
FRONT MOVES THROUGH THE OUTLOOK AREA. ANY STORMS THAT DEVELOP THIS
AFTERNOON THROUGH THE OVERNIGHT HOURS WILL BE CAPABLE OF PRODUCING
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL.

IN ADDITION TO ANY SEVERE WEATHER...HEAVY RAINFALL WILL BE
POSSIBLE AS THE FRONT MOVES THROUGH LEADING TO FLASH FLOODING. A
FLASH FLOOD WATCH IS IN EFFECT FOR AREAS NORTH AND EAST OF A
GAINESVILLE TO MERIDIAN TO ATHENS LINE THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

SHOWERS AND THUNDERSTORMS WILL CONTINUE MAINLY ACROSS THE
SOUTHEAST HALF OF NORTH TEXAS INTO TUESDAY. HEAVY RAINFALL WILL BE
THE MAIN THREAT DURING THIS TIME.

THE CHANCE FOR THUNDERSTORMS WILL CONTINUE FOR ALL OF NORTH TEXAS
THURSDAY AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY LATE THIS AFTERNOON AND INTO THE
EVENING HOURS FOR AREAS GENERALLY ALONG AND NORTH OF INTERSTATE
20. SPOTTER ACTIVATION MAY BE NEEDED ACROSS ALL OF NORTH TEXAS
DURING THE OVERNIGHT HOURS.

CAVANAUGH

In the hours before

Local storm report, Sep 21, 6:10 PM CDT, 46 minutes before

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Special weather statement, Sep 21, 6:14 PM CDT, 42 minutes before

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Local storm report, Sep 21, 6:29 PM CDT, 27 minutes before

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Local storm report, Sep 21, 6:35 PM CDT, 21 minutes before

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Special weather statement, Sep 21, 6:49 PM CDT, 7 minutes before

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Special weather statement, Sep 21, 6:53 PM CDT, 3 minutes before

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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 4:10 AM CDT	Flash Flood Watch	FWD	Bosque, Collin, Dallas, Delta, Denton, Ellis and 16 more	19 hr
Sep 21, 4:32 PM CDT	Special Weather Statement	FWD	Young	28 min
Sep 21, 4:44 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Young	29 min
Sep 21, 4:45 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Stephens	60 min
Sep 21, 5:26 PM CDT	Severe Thunderstorm Warning	FWD	Jack	64 min
Sep 21, 5:32 PM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath, Palo Pinto, Stephens	58 min
Sep 21, 5:52 PM CDT	Special Weather Statement	FWD	Montague	23 min
Sep 21, 5:58 PM CDT	Severe Thunderstorm Warning	FWD	Montague, Wise	77 min
Sep 21, 6:14 PM CDT	Special Weather Statement	FWD	Eastland	31 min
Sep 21, 6:20 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Parker	55 min
Sep 21, 6:28 PM CDT	Severe Thunderstorm Warning	FWD	Cooke	62 min
Sep 21, 6:44 PM CDT	Areal Flood Advisory	FWD	Palo Pinto	3 hr
Sep 21, 6:49 PM CDT	Special Weather Statement	FWD	Comanche	26 min
Sep 21, 6:53 PM CDT	Special Weather Statement	FWD	Hood, Somervell	22 min

Nearby

Flash Flood Warnings in Texas, 2009 Every flash flood warning in 2009

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.