Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 384, NWS Fort Worth, TX

July 28, 2009Stephens County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jul 28, 2009, 8:11 PM CDT for Stephens County, Texas. It was in force for 43 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 28, 2009, 8:11 PM CDT (01:11 UTC)
Expired: Jul 28, 2009, 8:54 PM CDT
In force: 43 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Stephens County, TX

The radar

The Dyess AFB radar (KDYX), 45 km from the middle of the area, began a volume at 01:12 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, 1.2 hours before the alert went out and 306 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: 553 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1736 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 28, 8:11 PM CDT, 0 minutes earlier.

Area forecast discussion, Jul 28, 8:11 PM CDT, 0 minutes before

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Hazardous weather outlook, Jul 28, 3:43 PM CDT, 4 hours 28 minutes before

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In the hours before

Special weather statement, Jul 28, 4:51 PM CDT, 3 hours 20 minutes before

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Special weather statement, Jul 28, 7:10 PM CDT, 1 hour 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
710 PM CDT TUE JUL 28 2009

TXZ129-290045-
EASTLAND TX-
710 PM CDT TUE JUL 28 2009

...SIGNIFICANT WEATHER ADVISORY FOR...
  WESTERN EASTLAND COUNTY

AT 709 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 12 MILES WEST OF CISCO...MOVING EAST AT 10 MPH.
THIS STORM WILL BEGIN TO ENTER EASTLAND COUNTY WITHIN THE NEXT 10 TO
15 MINUTES.

CITIES IN THE PATH OF THIS STORM INCLUDE CISCO AND RISING STAR.

IF THIS STORM CONTINUES ON ITS PRESENT COURSE AND MAINTAINS ITS
STRENGTH...A SEVERE WEATHER WARNING MAY BE NEEDED.

LAT...LON 3252 9912 3252 9911 3252 9888 3214 9881
      3209 9889 3209 9913
TIME...MOT...LOC 0009Z 266DEG 9KT 3245 9917

85/NH

Local storm report, Jul 28, 7:42 PM CDT, 29 minutes before

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Local storm report, Jul 28, 7:46 PM CDT, 25 minutes before

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Special weather statement, Jul 28, 7:52 PM CDT, 19 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
Jul 28, 7:10 PM CDT	Special Weather Statement	FWD	Eastland	35 min
Jul 28, 7:18 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	57 min
Jul 28, 7:52 PM CDT	Special Weather Statement	FWD	Stephens	23 min
Jul 29, 2:03 AM CDT	Special Weather Statement	FWD	Young	27 min
Jul 29, 2:21 AM CDT	Areal Flood Advisory	FWD	Young	3 hr
Jul 29, 2:43 AM CDT	Special Weather Statement	FWD	Jack	62 min
Jul 29, 2:52 AM CDT	Special Weather Statement	FWD	Stephens	23 min
Jul 29, 4:10 AM CDT	Special Weather Statement	FWD	Jack	35 min
Jul 29, 5:01 AM CDT	Special Weather Statement	FWD	Parker	29 min
Jul 29, 5:18 AM CDT	Flash Flood Warning	FWD	Palo Pinto, Parker	117 min
Jul 29, 5:38 AM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Parker	52 min
Jul 29, 7:13 AM CDT	Areal Flood Warning	FWD	Palo Pinto, Parker	3 hr
Jul 29, 7:34 AM CDT	Special Weather Statement	FWD	Somervell	26 min
Jul 29, 2:07 PM CDT	Special Weather Statement	FWD	Rockwall	23 min
Jul 29, 2:39 PM CDT	Special Weather Statement	FWD	Hunt	21 min
Jul 29, 2:47 PM CDT	Special Weather Statement	FWD	Hopkins	43 min
Jul 29, 4:37 PM CDT	Special Weather Statement	FWD	Rains	23 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm 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.