Alert archive / Texas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 46, NWS Houston/Galveston, TX

July 3, 20144 counties in Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 3, 2014, 3:51 PM CDT for 4 counties in Texas. It was in force for 24 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 3, 2014, 3:51 PM CDT (20:51 UTC)
Expired
Jul 3, 2014, 4:15 PM CDT
In force
24 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

Counties Grimes County, TX, Harris County, TX, Montgomery County, TX, Waller County, TX

The radar

The Houston radar (KHGX), 100 km from the middle of the area, began a volume at 20:54 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.9 hours before the alert went out and 242 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, Lake Charles Mun, LA at 12:00Z on 2014-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 678 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, Lake Charles Mun, LA at 12:00Z on 2014-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
678 J/kg
Mixed-layer CIN
-177 J/kg
Mixed-layer LCL
1234 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
8 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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 1:52 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Jul 3, 1:52 PM CDT, 1 hour 59 minutes before
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Hazardous weather outlook, Jul 3, 7:22 AM CDT, 8 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
722 AM CDT THU JUL 3 2014

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-041230-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-
MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-
TRINITY-WALKER-WALLER-WASHINGTON-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON-
722 AM CDT THU JUL 3 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

SLIGHT CHANCES FOR MID TO LATE AFTERNOON ISOLATED THUNDERSTORM DEVELOPMENT
THAT COULD PRODUCE VERY LOCALIZED HIGH RAINFALL LEADING TO SHORT LIVED
FLOODING...FREQUENT LIGHTNING...SMALL HAIL...AND GUSTY WINDS IN EXCESS
OF 35 MPH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH SUNDAY

THERE IS A HIGHER PROBABILITY FOR GREATER AREAL COVERAGE OF RAIN SHOWER
AND THUNDERSTORM ACTIVITY DURING THE HOLIDAY FRIDAY. THE MAIN THREATS
FOR THE STRONGEST FOURTH OF JULY THUNDERSTORMS WILL BE HIGH RAINFALL
RATES LEADING TO STREET FLOODING...FREQUENT LIGHTNING...AND GUSTY
DOWNBURST WINDS IN EXCESS OF 35 MPH. THE MAJORITY OF FIREWORKS DISPLAYS
WILL NOT BE AFFECTED BY ADVERSE WEATHER AS...BECAUSE THE STRONGEST
CONVECTION WILL BE FUELED BY AFTERNOON HEATING...MOST ACTIVITY WILL
WANE TO BELOW HAZARDOUS LEVELS AROUND SUNSET. PARTIES WITH OUTDOOR
ACTIVITY INTERESTS OVER INDEPENDENCE DAY SHOULD CLOSELY MONITOR
SUBSEQUENT FORECASTS AND OR ADVISORIES CONCERNING THE POTENTIAL
FOR HAZARDOUS HOLIDAY WEATHER.

REMEMBER THE LIGHTNING SAFETY RULES...WHEN THE THUNDER ROARS...GO
INDOORS!

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED IF AND WHEN DAILY THUNDERSTORM ACTIVITY
COMMENCES.

In the hours before

Special weather statement, Jul 3, 2:32 PM CDT, 1 hour 19 minutes before
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Special weather statement, Jul 3, 3:14 PM CDT, 37 minutes before
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Special weather statement, Jul 3, 3:19 PM CDT, 32 minutes before
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Special weather statement, Jul 3, 3:22 PM CDT, 29 minutes before
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Special weather statement, Jul 3, 3:25 PM CDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
325 PM CDT THU JUL 3 2014

TXZ195>198-032045-
GRIMES TX-BURLESON TX-BRAZOS TX-WASHINGTON TX-
325 PM CDT THU JUL 3 2014

...CORRECTION...

SPECIAL WEATHER STATEMENT

AT 320 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
MILLICAN...OR 7 MILES NORTHWEST OF NAVASOTA...MOVING NORTHEAST AT 5
MPH.

WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM AND
TORRENTIAL RAINFALL IS POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
SOUTHEASTERN COLLEGE STATION...NAVASOTA...MILLICAN...ANDERSON...
CARLOS AND WELLBORN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3032 9627 3056 9635 3071 9606 3040 9588
TIME...MOT...LOC 2020Z 243DEG 6KT 3048 9617

PK
Special weather statement, Jul 3, 3:40 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
340 PM CDT THU JUL 3 2014

TXZ195>200-212>214-032145-
GRIMES TX-HARRIS TX-BURLESON TX-LIBERTY TX-WALLER TX-CHAMBERS TX-
BRAZOS TX-WASHINGTON TX-MONTGOMERY TX-
340 PM CDT THU JUL 3 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WASHINGTON...
SOUTHEASTERN BRAZOS...EASTERN HARRIS...SOUTHERN MONTGOMERY...NORTHERN
WALLER...SOUTHERN GRIMES...SOUTHWESTERN LIBERTY...SOUTHEASTERN
BURLESON AND NORTHWESTERN CHAMBERS COUNTIES UNTIL 445 PM CDT...

AT 337 PM CDT...DOPPLER RADAR WAS TRACKING A DEVELOPING LINE OF
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF
COLLEGE STATION TO THE WOODLANDS TO 6 MILES EAST OF OLD RIVER-
WINFREE...AND MOVING SOUTHEAST AT 10 TO 20 MPH.

PEA SIZED HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

THE STORMS SHOULD MOVE INTO THE NORTHERN PORTIONS OF HOUSTON AS WELL
AS NORTHEAST WASHINGTON AND NORTHERN WALLER COUNTIES BY 445 PM.

LOCATIONS IMPACTED INCLUDE... SOUTHEASTERN COLLEGE
STATION...BAYTOWN...HUMBLE...TOMBALL... SOUTHWESTERN
LIBERTY...DAYTON...NAVASOTA...PRAIRIE VIEW...BEACH
CITY...PINEHURST...CHANNELVIEW...HIGHLANDS...ALDINE...KINGWOOD...
CLOVERLEAF...SPRING...BARRETT...GREATER GREENSPOINT...THE WOODLANDS
AND NORTHERN NORTHSIDE / NORTHLINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 2977 9476 2976 9482 2967 9488 2971 9500
      2975 9504 2975 9510 3037 9665 3057 9631
      2993 9459
TIME...MOT...LOC 2037Z 316DEG 17KT 3051 9630 2987 9472

!KP!

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 7:20 PM CDTSpecial Weather StatementHGXTrinity25 min
Jul 2, 7:45 PM CDTSevere Thunderstorm WarningHGXHouston, San Jacinto, Trinity, Walker30 min
Jul 2, 7:50 PM CDTAreal Flood AdvisoryHGXSan Jacinto, Trinity55 min
Jul 2, 8:10 PM CDTSevere Thunderstorm WarningHGXHouston, Madison, Trinity, Walker18 min
Jul 3, 12:59 PM CDTSpecial Weather StatementHGXPolk46 min
Jul 3, 2:32 PM CDTSpecial Weather StatementHGXWalker43 min
Jul 3, 3:14 PM CDTSpecial Weather StatementHGXPolk31 min
Jul 3, 3:19 PM CDTSpecial Weather StatementHGXSan Jacinto41 min
Jul 3, 3:22 PM CDTSpecial Weather StatementHGXGrimes23 min
Jul 3, 3:25 PM CDTSpecial Weather StatementHGXGrimes20 min
Jul 3, 3:40 PM CDTSpecial Weather StatementHGXMontgomery65 min
Jul 3, 4:28 PM CDTSpecial Weather StatementHGXTrinity47 min
Jul 3, 4:31 PM CDTSpecial Weather StatementHGXChambers44 min
Jul 3, 4:39 PM CDTSevere Thunderstorm WarningHGXFort Bend, Harris51 min
Jul 3, 5:04 PM CDTSpecial Weather StatementHGXAustin, Colorado41 min
Jul 3, 5:07 PM CDTAreal Flood AdvisoryHGXHarris53 min
Jul 3, 5:13 PM CDTAreal Flood AdvisoryHGXSan Jacinto, Trinity62 min
Jul 3, 5:13 PM CDTSpecial Weather StatementHGXHouston47 min
Jul 3, 5:36 PM CDTFlash Flood WarningHGXHarris54 min
Jul 3, 5:36 PM CDTSpecial Weather StatementHGXBrazos, Burleson, Madison54 min
Jul 3, 6:07 PM CDTAreal Flood AdvisoryHGXBrazos, Madison53 min
Jul 3, 6:25 PM CDTSpecial Weather StatementHGXBrazos, Burleson, Madison65 min
Jul 3, 6:38 PM CDTSpecial Weather StatementHGXJackson37 min
Jul 3, 6:41 PM CDTSpecial Weather StatementHGXHouston34 min
Jul 3, 6:44 PM CDTSevere Thunderstorm WarningHGXHouston, Trinity46 min
Jul 3, 6:51 PM CDTSevere Thunderstorm WarningHGXHouston24 min
Jul 3, 6:55 PM CDTSpecial Weather StatementHGXWharton35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2014Every severe thunderstorm warning in 2014

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.