Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 240, NWS Fort Worth, TX

May 31, 2007Lampasas County, Mills County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 31, 2007, 5:01 AM CDT for Lampasas County, Mills County, Texas. It was in force for 74 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
May 31, 2007, 5:01 AM CDT (10:01 UTC)
Expired
May 31, 2007, 6:15 AM CDT
In force
74 min
Issued by
NWS Fort Worth, TX
Area
Counties, with a storm outline in the text

Counties Lampasas County, TX, Mills County, TX

The radar

The Ft Hood radar (KGRK), 121 km from the middle of the area, began a volume at 10:05 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 00:00Z, 10.0 hours before the alert went out and 196 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 00:00Z on 2007-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 401 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, Fort Worth, TX at 00:00Z on 2007-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939Sfc1 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
401 J/kg
Mixed-layer CIN
-272 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
178 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 May 31, 3:45 AM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, May 31, 3:45 AM CDT, 1 hour 16 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
345 AM CDT THU MAY 31 2007

.DISCUSSION...
AN UPPER LEVEL LOW WILL REMAIN ANCHORED OVER THE NORTHERN PLAINS
INTO SATURDAY MORNING...THEN SLIDING EAST THROUGH THE GREAT LAKES
NEXT WEEK. A COLD FRONT WILL SLIDE DOWN INTO SOUTHERN OKLAHOMA
SATURDAY AND ACROSS NORTH TEXAS SATURDAY NIGHT. THE FRONT SHOULD
STALL OVER THE SOUTHERN ZONES.  IN ADDITION...NORTHWESTERLY FLOW
ALOFT BEGINS THIS WEEKEND WITH POTENTIAL FOR A MCS EVENT OVER THE
NORTHWEST SATURDAY MORNING AND AGAIN MONDAY OVER THE WEST AND
SOUTHERN ZONES. RIDGING ALOFT IS INDICATED FOR WEDNESDAY.

EVEN THOUGH LAST NIGHTS SOUNDING WAS CAPPED...LATE NIGHT CONVECTION
WAS THE RESULT OF CONVERGENCE ALONG AN ELEVATED BOUNDARY NEAR I-20.
THIS ACTIVITY CONTINUES TO SAG SOUTHEASTWARD...AND SHOULD CONTINUE
THROUGH MID MORNING. MOST CELLS HAVE BEEN HEAVY RAINFALL PRODUCERS
OVERNIGHT...AND FLASH FLOODING REMAINS A CONCERN FROM LAMPASAS TO
MERIDIAN...EASTWARD TO EAST OF I-35 THIS MORNING. PW/S WILL REMAIN
1 TO 1.50 INCHES INTO EARLY NEXT WEEK...THUS THE POTENTIAL FOR MORE
FLOODING WILL REMAIN. MORE STRONG CONVECTION IS EXPECTED THIS
AFTERNOON ALONG THE I-20 CORRIDOR...AND AGAIN HEAVY
RAINFALL...LOCALIZED FLOODING AND HAIL ARE POSSIBLE.

LESS CONVECTION IS EXPECTED FRIDAY...THEN DIURNAL BOUTS RETURN
SATURDAY THROUGH MONDAY DUE TO SHORTWAVE ACTION IN NORTHWEST FLOW
ALOFT.

MOS NUMBERS HAVE TRENDED UPWARD WITH UPPER 80S AND LOWER 90S
INDICATED SUNDAY THROUGH MID WEEK. THIS SEEMS REASON AS HEIGHTS
ALOFT START TO INCREASE.

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  87  72  87  69  86 /  40  20  10  20  20
WACO, TX              88  70  87  69  87 /  60  10  10  10  10
PARIS, TX             85  69  86  67  83 /  30  20  10  10  20
DENTON, TX            85  71  86  68  85 /  40  20  20  20  30
MCKINNEY, TX          85  69  86  67  84 /  40  20  10  20  20
DALLAS, TX            87  72  87  69  86 /  40  20  10  20  20
TERRELL, TX           86  70  87  69  85 /  40  20  10  10  20
CORSICANA, TX         88  70  87  69  86 /  30  20  10  10  10
TEMPLE, TX            89  70  88  69  87 /  60  10  10  10  10

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

79/75
Hazardous weather outlook, May 31, 3:30 AM CDT, 1 hour 31 minutes before
HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
330 AM CDT THU MAY 31 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-011100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
330 AM CDT THU MAY 31 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
SCATTERED THUNDERSTORMS WILL BE POSSIBLE TODAY ACROSS ALL OF NORTH
TEXAS.  STORMS WILL BE MOST NUMEROUS THIS MORNING SOUTH OF
INTERSTATE 20 AND WEST OF INTERSTATE 35. ALL STORMS WILL BE SLOW
MOVING AND EFFICIENT RAIN PRODUCERS.  THEREFORE...LOCALIZED FLASH
FLOODING WILL BE POSSIBLE.  A FEW STORMS MAY BRIEFLY BECOME SEVERE
AND PRODUCE HAIL UP TO ONE INCH IN DIAMETER AND DAMAGING DOWNBURST
WINDS. THUNDERSTORM CHANCES WILL DECREASE AFTER SUNSET.

.DAYS TWO THROUGH SEVEN...
WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS THE NORTHERN
SECTIONS OF NORTH TEXAS FRIDAY INTO SATURDAY. THUNDERSTORMS WILL
BECOME MORE NUMEROUS ACROSS ALL OF NORTH TEXAS ON SUNDAY WHEN A COLD
FRONT STALLS ACROSS THE REGION. THUNDERSTORM CHANCES WILL DIMINISH
FROM NORTH TO SOUTH ON MONDAY. ISOLATED SEVERE THUNDERSTORMS WILL BE
POSSIBLE...BUT LOCALLY HEAVY RAINFALL WILL BE THE PRIMARY THREAT
THROUGH THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS POSSIBLE THIS MORNING SOUTH OF INTERSTATE 20
AND WEST OF INTERSTATE 35. LIMITED SPOTTER ACTIVATION IS POSSIBLE
ACROSS ALL OF NORTH TEXAS THIS AFTERNOON.

79

In the hours before

Local storm report, May 31, 4:20 AM CDT, 41 minutes before
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Local storm report, May 31, 4:22 AM CDT, 39 minutes before
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Local storm report, May 31, 4:44 AM CDT, 17 minutes before
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Local storm report, May 31, 4:45 AM CDT, 16 minutes before
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Local storm report, May 31, 4:47 AM CDT, 14 minutes before
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Local storm report, May 31, 4:58 AM CDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:20 PM CDTSpecial Weather StatementFWDStephens25 min
May 30, 7:27 PM CDTSevere Thunderstorm WarningFWDStephens47 min
May 30, 8:34 PM CDTSpecial Weather StatementFWDEastland26 min
May 30, 8:53 PM CDTSpecial Weather StatementFWDEastland37 min
May 30, 11:49 PM CDTSpecial Weather StatementFWDComanche26 min
May 30, 11:55 PM CDTSevere Thunderstorm WarningFWDTarrant50 min
May 31, 12:15 AM CDTFlash Flood WarningFWDTarrant3 hr
May 31, 12:22 AM CDTSpecial Weather StatementFWDErath23 min
May 31, 12:24 AM CDTSpecial Weather StatementFWDJohnson36 min
May 31, 12:39 AM CDTSevere Thunderstorm WarningFWDJohnson, Parker, Tarrant66 min
May 31, 12:46 AM CDTSpecial Weather StatementFWDErath29 min
May 31, 12:56 AM CDTFlash Flood WarningFWDJohnson, Parker3 hr
May 31, 12:57 AM CDTSpecial Weather StatementFWDJohnson33 min
May 31, 1:09 AM CDTSpecial Weather StatementFWDErath36 min
May 31, 1:10 AM CDTSpecial Weather StatementFWDHood35 min
May 31, 1:18 AM CDTFlash Flood WarningFWDErath3 hr
May 31, 1:21 AM CDTSpecial Weather StatementFWDJohnson24 min
May 31, 1:39 AM CDTFlash Flood WarningFWDHood3 hr
May 31, 1:41 AM CDTSpecial Weather StatementFWDHood, Somervell34 min
May 31, 1:52 AM CDTSpecial Weather StatementFWDHamilton23 min
May 31, 2:18 AM CDTSpecial Weather StatementFWDSomervell27 min
May 31, 2:37 AM CDTSpecial Weather StatementFWDCoryell, Hamilton53 min
May 31, 2:58 AM CDTSevere Thunderstorm WarningFWDCoryell, Hamilton, Lampasas62 min
May 31, 3:04 AM CDTFlash Flood WarningFWDHamilton3 hr
May 31, 3:26 AM CDTFlash Flood WarningFWDCoryell, Lampasas3 hr
May 31, 3:33 AM CDTSevere Thunderstorm WarningFWDMills57 min
May 31, 3:43 AM CDTFlash Flood WarningFWDMills3 hr
May 31, 3:57 AM CDTSevere Thunderstorm WarningFWDLampasas63 min
May 31, 4:07 AM CDTTornado WarningFWDLampasas, Mills38 min
May 31, 5:03 AM CDTSevere Thunderstorm WarningFWDBell43 min
May 31, 4:50 PM CDTSpecial Weather StatementFWDHamilton25 min
May 31, 5:14 PM CDTSpecial Weather StatementFWDHamilton31 min
May 31, 5:43 PM CDTSpecial Weather StatementFWDComanche32 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007Every severe thunderstorm warning in 2007

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.