Alert archive / Texas / Wind Advisories in 2009

Wind Advisory 24, NWS Fort Worth, TX

October 29, 200921 counties in Texas

NWS Fort Worth, TX issued this wind advisory at Oct 29, 2009, 3:36 AM CDT for 21 counties in Texas. It took effect at Oct 29, 2009, 10:00 AM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Oct 29, 2009, 3:36 AM CDT (08:36 UTC)
In effect from: Oct 29, 2009, 10:00 AM CDT
Expired: Oct 29, 2009, 3:32 PM CDT
In force: 6 hr
Issued by: NWS Fort Worth, TX

All 21 counties

Anderson County, TX, Bell County, TX, Bosque County, TX, Coryell County, TX, Ellis County, TX, Falls County, TX, Freestone County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Robertson County, TX, Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 102 km from the middle of the area, began a volume at 08:38 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

Fort Worth, TX (KFWD), launched 00:00Z, 8.6 hours before the alert went out and 129 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: 947 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 602 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 484 m²/s²
0-3 km storm-relative helicity: 599 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 18.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind advisory 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 wind advisory went out at Oct 29, 3:31 AM CDT, 5 minutes earlier.

Area forecast discussion, Oct 29, 3:31 AM CDT, 5 minutes before

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Hazardous weather outlook, Oct 28, 9:54 PM CDT, 5 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
954 PM CDT WED OCT 28 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-291200-
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-
954 PM CDT WED OCT 28 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.

AFTER MIDNIGHT...A SQUALL LINE LINE OF STRONG TO SEVERE STORMS
WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT AREAS NORTHWEST OF A
COMANCHE...WEATHERFORD...GAINESVILLE LINE. DAMAGING STRAIGHT LINE
WINDS...LARGE HAIL...AND POSSIBLY AN ISOLATED TORNADO ARE POSSIBLE.
ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE FURTHER EAST...
BUT MAINLY NORTH OF INTERSTATE 20. SINCE THE GROUND IS ALREADY
SATURATED...ANY HEAVY RAIN WILL QUICKLY RUN OFF WHICH COULD PRODUCE
FLASH FLOODING. A FLASH FLOOD WATCH REMAINS IN EFFECT AFTER 4 AM...
FOR AREAS GENERALLY ALONG AND EAST OF THE INTERSTATE 35 CORRIDOR.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A FLASH FLOOD WATCH WILL REMAIN IN EFFECT THROUGH 7 PM THURSDAY
ALONG AND EAST OF A GAINESVILLE TO GATESVILLE LINE. WIDESPREAD
RAIN AND THUNDERSTORMS WILL OCCUR THURSDAY. SOME OF THESE STORMS
WILL PRODUCE DAMAGING WINDS AND THE HEAVY RAIN WILL RESULT IN
FLASH FLOODING. GIVEN THE STRONG VERTICAL WIND SHEAR...ISOLATED
TORNADOES WILL BE POSSIBLE.

ISOLATED THUNDERSTORMS ARE POSSIBLE THURSDAY NIGHT AND FRIDAY...BUT
SEVERE WEATHER IS NOT EXPECTED WITH THESE STORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS LIKELY ACROSS NORTHWEST PARTS OF NORTH
TEXAS WELL AFTER MIDNIGHT...AND MAY BE NEEDED FURTHER EAST NEAR
THE RED RIVER VALLEY.

05/

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 1:00 AM CDT	Tornado Warning	FWD	Hill, Johnson	45 min
Oct 29, 7:35 AM CDT	River Flood Warning	FWD	Collin	13 hr
Oct 29, 9:34 AM CDT	River Flood Warning	FWD	Delta, Hopkins	48 hr
Oct 29, 9:48 AM CDT	Areal Flood Advisory	FWD	Denton, Tarrant	3 hr
Oct 29, 10:03 AM CDT	River Flood Warning	FWD	Dallas	34 hr
Oct 29, 10:03 AM CDT	River Flood Warning	FWD	Dallas	11 hr
Oct 29, 11:04 AM CDT	Areal Flood Advisory	FWD	Dallas	3 hr
Oct 29, 11:13 AM CDT	Special Weather Statement	FWD	Dallas	32 min
Oct 29, 11:34 AM CDT	Special Weather Statement	FWD	Ellis	26 min
Oct 29, 11:48 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis	57 min
Oct 29, 11:53 AM CDT	Areal Flood Advisory	FWD	Collin	2 hr
Oct 29, 12:20 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Hunt, Kaufman, Rockwall	35 min
Oct 29, 1:35 PM CDT	Special Weather Statement	FWD	Hopkins	25 min
Oct 29, 2:04 PM CDT	Special Weather Statement	FWD	Henderson	26 min
Oct 29, 2:07 PM CDT	Special Weather Statement	FWD	Lamar	23 min
Oct 29, 2:40 PM CDT	Special Weather Statement	FWD	Henderson, Van Zandt	35 min
Oct 29, 3:17 PM CDT	Special Weather Statement	FWD	Freestone	28 min

Nearby

Wind Advisories in Texas, 2009 Every wind advisory 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.