Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 94, NWS Fort Worth, TX

April 17, 2009McLennan County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 17, 2009, 10:24 AM CDT for McLennan County, Texas. It was in force for 51 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
Apr 17, 2009, 10:24 AM CDT (15:24 UTC)
Expired
Apr 17, 2009, 11:15 AM CDT
In force
51 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

County McLennan County, TX

The radar

The Ft Hood radar (KGRK), 94 km from the middle of the area, began a volume at 15:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 17, 7:48 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 3.4 hours before the alert went out and 142 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, Fort Worth, TX at 12:00Z on 2009-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 12:00Z on 2009-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 256 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
784 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
256 m²/s²
0-3 km storm-relative helicity
263 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

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 Apr 17, 9:57 AM CDT, 27 minutes earlier.

Area forecast discussion, Apr 17, 9:57 AM CDT, 27 minutes before
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Hazardous weather outlook, Apr 17, 4:31 AM CDT, 5 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
431 AM CDT FRI APR 17 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-181100-
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-
431 AM CDT FRI APR 17 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A COMPLEX OF THUNDERSTORMS WILL CONTINUE TO MOVE THROUGH NORTH
TEXAS THIS MORNING. LARGE HAIL AND FREQUENT LIGHTNING WILL BE
POSSIBLE. IN ADDITION...LOCALLY HEAVY RAINFALL WILL CONTINUE TO
POSE A THREAT...ESPECIALLY SOUTH OF I-20.

STORMS MAY REDEVELOP THIS AFTERNOON WEST OF I-35 AND SPREAD EAST.
LARGE HAIL AND LOCALLY HEAVY RAINFALL ARE THE MAIN SEVERE WEATHER
THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
SCATTERED THUNDERSTORMS ARE POSSIBLE MAINLY EAST OF I-35 AND SOUTH
OF I-20 ON SATURDAY. DAMAGING WINDS AND LARGE HAIL ARE THE MAIN
SEVERE WEATHER THREATS.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED.

13

In the hours before

Local storm report, Apr 17, 8:56 AM CDT, 1 hour 28 minutes before
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Local storm report, Apr 17, 9:00 AM CDT, 1 hour 24 minutes before
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Local storm report, Apr 17, 9:11 AM CDT, 1 hour 13 minutes before
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Local storm report, Apr 17, 9:57 AM CDT, 27 minutes before
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Special weather statement, Apr 17, 10:10 AM CDT, 14 minutes before
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Local storm report, Apr 17, 10:20 AM CDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 7:03 PM CDTSevere Thunderstorm WarningFWDLeon57 min
Apr 16, 7:45 PM CDTSpecial Weather StatementFWDNavarro30 min
Apr 16, 8:16 PM CDTSpecial Weather StatementFWDNavarro29 min
Apr 16, 8:25 PM CDTSpecial Weather StatementFWDEllis35 min
Apr 16, 8:42 PM CDTSpecial Weather StatementFWDCherokee33 min
Apr 16, 9:02 PM CDTSpecial Weather StatementFWDHenderson28 min
Apr 16, 9:12 PM CDTSpecial Weather StatementFWDMontague33 min
Apr 16, 9:25 PM CDTSevere Thunderstorm WarningFWDCooke, Montague53 min
Apr 16, 9:35 PM CDTSpecial Weather StatementFWDDenton25 min
Apr 16, 9:43 PM CDTSpecial Weather StatementFWDKaufman32 min
Apr 16, 9:55 PM CDTSpecial Weather StatementFWDTarrant35 min
Apr 16, 10:13 PM CDTSpecial Weather StatementFWDVan Zandt32 min
Apr 16, 10:17 PM CDTSpecial Weather StatementFWDRockwall28 min
Apr 16, 11:12 PM CDTSpecial Weather StatementFWDRains33 min
Apr 17, 6:46 AM CDTSpecial Weather StatementFWDHamilton29 min
Apr 17, 7:16 AM CDTSpecial Weather StatementFWDHamilton29 min
Apr 17, 7:33 AM CDTSevere Thunderstorm WarningFWDLampasas42 min
Apr 17, 7:45 AM CDTSpecial Weather StatementFWDBosque30 min
Apr 17, 7:59 AM CDTSpecial Weather StatementFWDEastland, Stephens, Young61 min
Apr 17, 8:14 AM CDTSevere Thunderstorm WarningFWDBell, Coryell, Lampasas76 min
Apr 17, 8:18 AM CDTSpecial Weather StatementFWDJohnson27 min
Apr 17, 8:40 AM CDTSevere Thunderstorm WarningFWDHill47 min
Apr 17, 9:04 AM CDTSevere Thunderstorm WarningFWDEllis, Johnson56 min
Apr 17, 9:13 AM CDTSevere Thunderstorm WarningFWDCoryell62 min
Apr 17, 9:31 AM CDTSevere Thunderstorm WarningFWDBell, McLennan59 min
Apr 17, 9:34 AM CDTAreal Flood AdvisoryFWDBell, Coryell3 hr
Apr 17, 10:10 AM CDTSpecial Weather StatementFWDFalls, Milam35 min
Apr 17, 10:33 AM CDTSpecial Weather StatementFWDDallas, Ellis27 min
Apr 17, 10:39 AM CDTSpecial Weather StatementFWDHill36 min
Apr 17, 10:47 AM CDTSpecial Weather StatementFWDPalo Pinto, Parker, Tarrant, Wise28 min
Apr 17, 10:49 AM CDTSpecial Weather StatementFWDErath, Hamilton, Hood, Lampasas, Mills, Somervell26 min
Apr 17, 10:59 AM CDTSpecial Weather StatementFWDLimestone31 min
Apr 17, 11:00 AM CDTSpecial Weather StatementFWDLeon30 min
Apr 17, 11:17 AM CDTSpecial Weather StatementFWDFreestone, Navarro28 min
Apr 17, 11:21 AM CDTSpecial Weather StatementFWDRobertson24 min
Apr 17, 11:23 AM CDTAreal Flood AdvisoryFWDFalls, Limestone, Milam, Robertson3 hr
Apr 17, 11:28 AM CDTAreal Flood AdvisoryFWDDallas, Ellis, Henderson, Kaufman, Navarro, Rockwall3 hr
Apr 17, 11:43 AM CDTSpecial Weather StatementFWDFreestone, Henderson, Kaufman32 min
Apr 17, 11:53 AM CDTAreal Flood AdvisoryFWDFreestone, Leon3 hr
Apr 17, 12:01 PM CDTSpecial Weather StatementFWDCollin, Dallas, Ellis, Grayson, Rockwall119 min
Apr 17, 12:11 PM CDTSpecial Weather StatementFWDCooke, Denton, Montague, Tarrant, Wise34 min
Apr 17, 12:13 PM CDTSpecial Weather StatementFWDBell, Bosque, Coryell, Ellis, Falls, Hill and 4 more32 min
Apr 17, 12:19 PM CDTSpecial Weather StatementFWDAnderson26 min
Apr 17, 12:29 PM CDTAreal Flood AdvisoryFWDAnderson, Henderson, Van Zandt3 hr
Apr 17, 12:42 PM CDTSpecial Weather StatementFWDDelta, Lamar63 min
Apr 17, 12:43 PM CDTAreal Flood AdvisoryFWDDelta, Fannin, Hopkins, Hunt, Lamar, Rains3 hr
Apr 17, 1:08 PM CDTSpecial Weather StatementFWDKaufman, Limestone, Navarro67 min
Apr 17, 2:04 PM CDTSpecial Weather StatementFWDFannin, Hunt71 min
Apr 17, 2:11 PM CDTSpecial Weather StatementFWDAnderson, Henderson, Rains, Van Zandt79 min
Apr 17, 2:49 PM CDTSpecial Weather StatementFWDCoryell26 min
Apr 17, 3:04 PM CDTSpecial Weather StatementFWDDelta, Hopkins, Lamar86 min
Apr 17, 3:19 PM CDTSpecial Weather StatementFWDCoryell26 min
Apr 17, 3:32 PM CDTSpecial Weather StatementFWDAnderson, Henderson, Leon, Van Zandt58 min
Apr 17, 5:30 PM CDTSpecial Weather StatementFWDMilam30 min
Apr 17, 5:40 PM CDTSpecial Weather StatementFWDMcLennan35 min
Apr 17, 5:44 PM CDTSpecial Weather StatementFWDBell31 min
Apr 17, 6:20 PM CDTSpecial Weather StatementFWDMilam25 min
Apr 17, 6:50 PM CDTSpecial Weather StatementFWDRobertson25 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every 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.