Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 469, NWS Fort Worth, TX

July 2, 2011Van Zandt County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jul 2, 2011, 3:30 PM CDT for Van Zandt County, Texas. It was in force for 45 min. 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 2, 2011, 3:30 PM CDT (20:30 UTC)
Expired: Jul 2, 2011, 4:15 PM CDT
In force: 45 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 137 km from the middle of the area, began a volume at 20:32 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

Fort Worth, TX (KFWD), launched 12:00Z, 8.5 hours before the alert went out and 139 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: 897 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1666 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: -39 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 severe thunderstorm 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 severe thunderstorm warning went out at Jul 2, 3:25 PM CDT, 5 minutes earlier.

Area forecast discussion, Jul 2, 3:25 PM CDT, 5 minutes before

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Hazardous weather outlook, Jul 2, 4:46 AM CDT, 10 hours 44 minutes before

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In the hours before

Special weather statement, Jul 2, 2:50 PM CDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
250 PM CDT SAT JUL 2 2011

TXZ122-022015-
VAN ZANDT TX-
250 PM CDT SAT JUL 2 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  VAN ZANDT COUNTY

AT 249 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED TWO
STRONG THUNDERSTORMS ABOUT 10 MILES EAST OF CANTON...MOVING WEST AT
15 MPH. IN ADDITION...ANOTHER STRONG STORM WAS LOCATED OVER WILLS
POINT.

CITIES IN THE PATH OF THIS STORM INCLUDE CANTON...VAN...AND WILLS
POINT.

PENNY-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THESE
STORMS.

LAT...LON 3236 9608 3284 9608 3284 9594 3281 9592
      3277 9585 3278 9579 3273 9567 3271 9566
      3272 9565 3269 9559 3235 9559
TIME...MOT...LOC 1949Z 104DEG 12KT 3253 9567

82/JLD

Special weather statement, Jul 2, 3:18 PM CDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
318 PM CDT SAT JUL 2 2011

TXZ122-022115-
VAN ZANDT TX-
318 PM CDT SAT JUL 2 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  VAN ZANDT COUNTY

AT 316 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS STRETCHING FROM CANTON TO VAN...MOVING WEST AT
15 MPH. ADDITIONAL STRONG THUNDERSTORMS WERE LOCATED AROUND THE
WILLS POINT AREA.

CITIES IN THE PATH OF THESE STORMS INCLUDE CANTON...GRAND
SALINE...VAN...AND WILLS POINT.

PENNY-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THESE
STORMS.

LAT...LON 3235 9546 3236 9607 3284 9608 3270 9559
      3248 9560
TIME...MOT...LOC 2016Z 104DEG 12KT 3250 9575

82/JLD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 7:56 PM CDT	Special Weather Statement	FWD	Van Zandt	34 min
Jul 2, 2:50 PM CDT	Special Weather Statement	FWD	Van Zandt	25 min
Jul 2, 3:18 PM CDT	Special Weather Statement	FWD	Van Zandt	57 min
Jul 2, 3:45 PM CDT	Special Weather Statement	FWD	Anderson	30 min
Jul 2, 3:56 PM CDT	Severe Thunderstorm Warning	FWD	Anderson	34 min
Jul 2, 4:30 PM CDT	Severe Thunderstorm Warning	FWD	Anderson	45 min
Jul 2, 4:52 PM CDT	Special Weather Statement	FWD	Freestone	38 min
Jul 2, 4:55 PM CDT	Severe Thunderstorm Warning	FWD	Freestone	35 min
Jul 2, 5:39 PM CDT	Special Weather Statement	FWD	Freestone	36 min
Jul 2, 6:01 PM CDT	Special Weather Statement	FWD	Collin	29 min
Jul 2, 6:08 PM CDT	Special Weather Statement	FWD	Jack, Palo Pinto, Stephens, Young	52 min
Jul 2, 6:15 PM CDT	Special Weather Statement	FWD	Collin	30 min
Jul 2, 6:18 PM CDT	Severe Thunderstorm Warning	FWD	Collin	31 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning in 2011

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.