Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 14, NWS Houston/Galveston, TX

February 15, 2008Houston County, Madison County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Feb 15, 2008, 7:46 PM CST for Houston County, Madison County, Texas. It was in force for 44 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
Feb 15, 2008, 7:46 PM CST (01:46 UTC)
Expired
Feb 15, 2008, 8:30 PM CST
In force
44 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

Counties Houston County, TX, Madison County, TX

The radar

The Ft Hood radar (KGRK), 169 km from the middle of the area, began a volume at 01:48 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, 1.8 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, Fort Worth, TX at 00:00Z on 2008-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 2008-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 188 square meters per square second.19395878Sfc1 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
434 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
188 m²/s²
0-3 km storm-relative helicity
162 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 Feb 15, 6:45 PM CST, 1 hour 1 minute earlier.

Area forecast discussion, Feb 15, 6:45 PM CST, 1 hour 1 minute before
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Hazardous weather outlook, Feb 15, 4:17 PM CST, 3 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
417 PM CST FRI FEB 15 2008

GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-
161315-
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-WHARTON-
417 PM CST FRI FEB 15 2008

...SIGNIFICANT THREAT FOR SEVERE WEATHER ACROSS ALL OF SOUTHEAST
TEXAS SATURDAY AND SATURDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TONIGHT

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL PERSIST OVER
SOUTHEAST TEXAS TONIGHT AS MOISTURE CONTINUES TO INCREASE IN
ADVANCE OF AN APPROACHING UPPER LEVEL STORM SYSTEM. A FEW STRONGER
STORMS ARE POSSIBLE AFTER 4 AM...WITH THE POTENTIAL FOR SMALL HAIL
AND GUSTY WINDS. RAINFALL AMOUNTS TONIGHT WILL AVERAGE 1/4 TO 1/2
INCH WITH ISOLATED TOTALS TO AN INCH. OTHERWISE...HAZARDOUS
WEATHER IS NOT EXPECTED.

.DAY TWO...SATURDAY AND SATURDAY NIGHT

AN APPROACHING UPPER LEVEL STORM SYSTEM WILL COMBINE WITH A VERY
MOIST AND UNSTABLE AIRMASS TO PRODUCE NUMEROUS SHOWERS AND
THUNDERSTORMS SATURDAY. STRONG SHEAR IN THE LOWER LEVELS OF THE
ATMOSPHERE WILL SUPPORT THE DEVELOPMENT OF SUPERCELLS AND
ISOLATED TORNADOES DURING THE LATE MORNING THROUGH EARLY EVENING
HOURS SATURDAY. IN ADDITION TO TORNADOES...FREQUENT LIGHTNING...
LARGE HAIL AND DAMAGING WINDS WILL ALSO BE POSSIBLE.

A SQUALL LINE WILL DEVELOP OVER THE WESTERN COUNTIES OF SOUTHEAST
TEXAS BEGINNING MID AFTERNOON SATURDAY...AND MOVE EAST ACROSS THE
AREA DURING THE LATE AFTERNOON AND EVENING HOURS. SOME OF THESE
STORMS COULD BECOME SEVERE PRODUCING DAMAGING WINDS...HAIL...
FREQUENT LIGHTNING AND HEAVY RAINFALL.

THROUGH SATURDAY EVENING...WIDESPREAD RAINFALL AMOUNTS OF 1 TO 2
INCHES ARE EXPECTED...WITH ISOLATED TOTALS UP TO 4 INCHES
POSSIBLE. LOCALIZED FLOODING OF STREETS...FEEDER ROADS...SECONDARY
ROADS...AND LOW WATER CROSSINGS WILL BE POSSIBLE WITH THE
STRONGEST STORMS.

THE SEVERE WEATHER THREAT WILL BEGIN MID MORNING SATURDAY AND
LAST WELL INTO THE EVENING HOURS. THE THREAT FOR SEVERE WEATHER
WITH THIS EVENT WILL BE GREATER THAN THE AREA HAS SEEN DURING
RECENT EVENTS.

RESIDENTS OF SOUTHEAST TEXAS ARE ENOURAGED TO STAY ABREAST OF THE
RAPIDLY CHANGING WEATHER CONDITIONS ON SATURDAY. MONITOR NOAA
WEATHER RADIO...NEWS MEDIA...INTERNET...AND OTHER WEATHER
INFORMATION SOURCES. BE PREPARED TO ACT QUICKLY IF SEVERE
TORNADOES OR SEVERE THUNDERSTORMS THREATEN YOUR AREA.

.DAYS THREE THROUGH SEVEN...SUNDAY THROUGH THURSDAY

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

EMERGENCY MANAGEMENT AND SPOTTER ACTIVATION ARE LIKELY SATURDAY.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 9:08 PM CSTSevere Thunderstorm WarningHGXBrazos, Grimes, Washington37 min
Feb 15, 9:43 PM CSTSevere Thunderstorm WarningHGXBrazos, Grimes, Washington32 min
Feb 15, 10:14 PM CSTSevere Thunderstorm WarningHGXHarris31 min
Feb 15, 10:28 PM CSTSevere Thunderstorm WarningHGXMontgomery30 min
Feb 15, 11:23 PM CSTSevere Thunderstorm WarningHGXHouston, Madison, Walker14 min
Feb 15, 11:28 PM CSTSevere Thunderstorm WarningHGXLiberty32 min
Feb 16, 5:17 PM CSTTornado WarningHGX43 min
Feb 16, 5:46 PM CSTTornado WarningHGXHouston, Trinity, Walker44 min
Feb 16, 5:56 PM CSTTornado WarningHGXHouston20 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008Every severe thunderstorm warning in 2008

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.