Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 271, NWS Lubbock, TX

July 29, 2009Hale County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Jul 29, 2009, 9:44 PM CDT for Hale County, Texas. It was in force for 46 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 29, 2009, 9:44 PM CDT (02:44 UTC)
Expired
Jul 29, 2009, 10:30 PM CDT
In force
46 min
Issued by
NWS Lubbock, TX
Area
Storm-based polygon

County Hale County, TX

The radar

The Lubbock radar (KLBB), 46 km from the middle of the area, began a volume at 02:47 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
Jul 29, 5:36 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 2.7 hours before the alert went out and 238 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, Midland Regional, TX at 00:00Z on 2009-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1022 joules per kilogram.LCLLFCEL10008507005003002001001 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, Midland Regional, TX at 00:00Z on 2009-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1022 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
2144 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
113 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 Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 2:56 PM CDT, 6 hours 48 minutes earlier.

Area forecast discussion, Jul 29, 2:56 PM CDT, 6 hours 48 minutes before
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Hazardous weather outlook, Jul 29, 7:15 AM CDT, 14 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LUBBOCK TX
715 AM CDT WED JUL 29 2009

TXZ021>044-301215-
PARMER-CASTRO-SWISHER-BRISCOE-HALL-CHILDRESS-BAILEY-LAMB-HALE-
FLOYD-MOTLEY-COTTLE-COCHRAN-HOCKLEY-LUBBOCK-CROSBY-DICKENS-KING-
YOAKUM-TERRY-LYNN-GARZA-KENT-STONEWALL-
715 AM CDT WED JUL 29 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EXTREME SOUTHERN TEXAS
PANHANDLE...SOUTH PLAINS AND ROLLING PLAINS.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORM DEVELOPMENT IS EXPECTED THIS AFTERNOON AND EVENING AS
UPPER AIR DISTURBANCES CONTINUE TO MOVE OUT OF THE ROCKIES AND
INTERACT WITH A MOIST AND UNSTABLE AIRMASS ACROSS WEST TEXAS.
OVERALL...THIS ACTIVITY IS EXPECTED TO BE ISOLATED...BUT A FEW OF
THE THUNDERSTORMS COULD BECOME SEVERE WITH LARGE HAIL AND DAMAGING
WINDS. TONIGHT...THERE IS THE POTENTIAL FOR AN ORGANIZED
THUNDERSTORM COMPLEX TO MOVE ACROSS PORTIONS OF THE OUTLOOK
AREA...LIKELY IMPACTING THE FAR SOUTHERN TEXAS PANHANDLE AND
NORTHERN ROLLING PLAINS. THIS WILL BRING THE A THREAT OF DAMAGING
WINDS AND LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS WILL BE POSSIBLE IN THE LATE AFTERNOON THROUGH
NIGHTTIME HOURS THROUGH THE REST OF THE WEEK AND A FEW OF THE
STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WINDS AND ISOLATED
LARGE HAIL. LOCALLY HEAVY RAINFALL WILL REMAIN POSSIBLE AND AREAS
THAT RECEIVE REPEATED HEAVY RAINFALL COULD SEE EXCESSIVE STORM
RUNOFF.

.SPOTTER INFORMATION STATEMENT...

LIMITED SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 7:26 PM CDTSevere Thunderstorm WarningLUBBailey, Parmer64 min
Jul 29, 8:15 PM CDTSevere Thunderstorm WarningLUBCastro, Parmer60 min
Jul 29, 8:44 PM CDTSevere Thunderstorm WarningLUBBailey61 min
Jul 29, 9:10 PM CDTSevere Thunderstorm WarningLUBHale, Lamb50 min
Jul 29, 9:19 PM CDTSevere Thunderstorm WarningLUBBailey, Cochran, Hockley, Lamb56 min
Jul 29, 9:40 PM CDTSevere Thunderstorm WarningLUBBriscoe, Hall, Motley65 min
Jul 29, 9:59 PM CDTSevere Thunderstorm WarningLUBFloyd, Hale, Hockley, Lamb, Lubbock61 min
Jul 29, 10:21 PM CDTSevere Thunderstorm WarningLUBChildress, Cottle, Hall, Motley54 min
Jul 29, 10:23 PM CDTSevere Thunderstorm WarningLUBBailey, Cochran, Hockley67 min
Jul 29, 11:03 PM CDTSevere Thunderstorm WarningLUBHale, Hockley, Lamb, Lubbock, Lynn, Terry57 min
Jul 29, 11:36 PM CDTSevere Thunderstorm WarningLUBCrosby, Garza, Lubbock, Lynn, Terry54 min
Jul 30, 12:15 AM CDTSevere Thunderstorm WarningLUBDickens, Kent, King, Stonewall60 min
Jul 30, 12:20 AM CDTSevere Thunderstorm WarningLUBCrosby, Garza, Kent55 min
Jul 30, 12:24 AM CDTAreal Flood AdvisoryLUBLubbock, Lynn111 min
Jul 30, 1:10 AM CDTSevere Thunderstorm WarningLUBKent, King, Stonewall43 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.