Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 254, NWS Lubbock, TX

July 19, 2009Kent County, Stonewall County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Jul 19, 2009, 2:44 AM CDT for Kent County, Stonewall County, Texas. It was in force for 19 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 19, 2009, 2:44 AM CDT (07:44 UTC)
Expired: Jul 19, 2009, 3:03 AM CDT
In force: 19 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon

Counties Kent County, TX, Stonewall County, TX

The radar

The Lubbock radar (KLBB), 132 km from the middle of the area, began a volume at 07:46 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

Midland Regional, TX (KMAF), launched 00:00Z, 7.7 hours before the alert went out and 209 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2962 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 52 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 Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 12:12 AM CDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jul 19, 12:12 AM CDT, 2 hours 32 minutes before

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Hazardous weather outlook, Jul 18, 4:46 AM CDT, 21 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LUBBOCK TX
446 AM CDT SAT JUL 18 2009

TXZ021>044-191000-
PARMER-CASTRO-SWISHER-BRISCOE-HALL-CHILDRESS-BAILEY-LAMB-HALE-
FLOYD-MOTLEY-COTTLE-COCHRAN-HOCKLEY-LUBBOCK-CROSBY-DICKENS-KING-
YOAKUM-TERRY-LYNN-GARZA-KENT-STONEWALL-
446 AM CDT SAT JUL 18 2009

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

.DAY ONE...TODAY AND TONIGHT

CONVECTIVE

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER PORTIONS OF
EASTERN NEW MEXICO...THE TEXAS PANHANDLE...AND THE SOUTH PLAINS
THIS AFTERNOON AND EVENING. SOME OF THESE STORMS WILL LIKELY
BECOME SEVERE...AND LOCALLY HEAVY RAINFALL WILL BE POSSIBLE. THE
MOST LIKELY LOCATIONS WITHIN THE OUTLOOK AREA TO EXPERIENCE
THUNDERSTORM AND SEVERE WEATHER ACTIVITY LATER TODAY WILL BE THE
EXTREME SOUTHERN PANHANDLE...AND AREAS OF THE SOUTH PLAINS WEST OF
THE CAPROCK ESCARPMENT. THE GREATEST SEVERE WEATHER THREAT WILL
LIKELY EXIST BETWEEN 4 PM AND MIDNIGHT...AS STORMS MOVE
SOUTHEASTWARD OVER THE WESTERN SOUTH PLAINS. GIVEN THE DEGREE OF
INSTABILITY AND SHEAR...A FEW SUPERCELL STORMS WILL BE POSSIBLE...
HOWEVER...THE PRIMARY SEVERE WEATHER HAZARD ASSOCIATED WITH THESE
STORMS WILL BE THE POTENTIAL FOR DAMAGING WINDS AS ACTIVITY CONGEALS
INTO A COMPLEX OF THUNDERSTORMS THIS EVENING. LARGE HAIL WILL ALSO
BE POSSIBLE. IN FACT...AN ISOLATED OCCURRENCE OF HAIL UP TO TWO
INCHES IN DIAMETER MAY OCCUR. IN ADDITION...A LOW THREAT FOR AN
ISOLATED TORNADO MAY ALSO EXIST...ESPECIALLY IF ANY REMNANT
OUTFLOW BOUNDARIES FROM LAST EVENING/S ROUND OF THUNDERSTORMS
BECOMES APPARENT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THUNDERSTORM CHANCES WILL PERSIST SUNDAY AND INTO THE FIRST HALF
OF THE UPCOMING WORK WEEK. ALTHOUGH WIDESPREAD SEVERE WEATHER IS
NOT ANTICIPATED...A THREAT FOR ISOLATED AND BRIEFLY SEVERE STORMS
WILL EXIST EACH AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, Jul 19, 12:52 AM CDT, 1 hour 52 minutes before

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Special weather statement, Jul 19, 1:04 AM CDT, 1 hour 40 minutes before

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Special weather statement, Jul 19, 1:40 AM CDT, 1 hour 4 minutes before

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Special weather statement, Jul 19, 2:03 AM CDT, 41 minutes before

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Special weather statement, Jul 19, 2:12 AM CDT, 32 minutes before

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Special weather statement, Jul 19, 2:21 AM CDT, 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:31 PM CDT	Severe Thunderstorm Warning	LUB	Castro	59 min
Jul 18, 8:22 PM CDT	Severe Thunderstorm Warning	LUB	Bailey, Lamb, Parmer	53 min
Jul 18, 9:12 PM CDT	Severe Thunderstorm Warning	LUB	Bailey, Cochran, Hockley, Lamb	63 min
Jul 19, 1:18 AM CDT	Severe Thunderstorm Warning	LUB	King	42 min
Jul 19, 1:54 AM CDT	Severe Thunderstorm Warning	LUB	Kent, King, Stonewall	51 min
Jul 19, 2:21 AM CDT	Severe Thunderstorm Warning	LUB	Briscoe, Floyd, Swisher	33 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.