Alert archive / Texas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 14, NWS Houston/Galveston, TX

April 14, 2014Grimes County, Madison County, Walker County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 14, 2014, 7:51 AM CDT for Grimes County, Madison County, Walker County, Texas. It was in force for 39 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: Apr 14, 2014, 7:51 AM CDT (12:51 UTC)
Expired: Apr 14, 2014, 8:30 AM CDT
In force: 39 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

Counties Grimes County, TX, Madison County, TX, Walker County, TX

The radar

The Ft Hood radar (KGRK), 149 km from the middle of the area, began a volume at 12:51 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, 0.9 hours before the alert went out and 262 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: 585 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.8

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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 14, 7:02 AM CDT, 49 minutes earlier.

Area forecast discussion, Apr 14, 7:02 AM CDT, 49 minutes before

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Hazardous weather outlook, Apr 14, 5:09 AM CDT, 2 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
509 AM CDT MON APR 14 2014

TXZ163-164-176>179-195>200-210>214-226-227-235>238-151015-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-
WHARTON-
509 AM CDT MON APR 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL PUSH INTO THE AREA TODAY WITH A LINE OF SHOWERS
AND THUNDERSTORMS. A FEW STORMS MAY FORM BEHIND THE FRONT WITH
ELEVATED INSTABILITY. SOME OF THESE STORMS COULD BECOME STRONG
WITH SMALL HAIL...STRONG GUSTY WINDS...LIGHTNING AND BRIEF HEAVY
RAINFALL. STORMS SHOULD PUSH THROUGH THE AREA THIS MORNING AND
EARLY AFTERNOON WITH SHOWERS AFTER THE THUNDERSTORMS.

WINDS WILL BE VERY STRONG BEHIND THE FRONT WITH GENERALLY 20 TO 30
MPH WINDS AND GUSTS TO AROUND 35 MPH. A WIND ADVISORY IS IN EFFECT
10 AM TO 9 PM TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

RECORD LOW TEMPERATURES MAY BE POSSIBLE TUESDAY AND WEDNESDAY
MORNINGS. FREEZING TEMPERATURES ARE NOT EXPECTED BUT TEMPERATURES
COULD DROP CLOSE TO FREEZING IN RURAL AREAS. OTHERWISE HAZARDOUS
WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

GMZ330-335-350-355-370-375-151015-
GALVESTON BAY-MATAGORDA BAY-
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-
509 AM CDT MON APR 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

A STRONG COLD FRONT WILL PUSH OFF THE COAST THIS AFTERNOON AND
TONIGHT. STRONG NORTHERLY WINDS TO GALE FORCE WILL BE POSSIBLE
WITH GUSTS TO AROUND 40 KNOTS. SEAS WILL BECOME VERY ROUGH WITH
SEAS GREATER THAN 10 FEET IN MOST OFFSHORE WATERS TONIGHT.
CONDITIONS WILL BE SLOW TO DECREASE. GALE WARNINGS ARE IN EFFECT
THROUGH TUESDAY MORNING. A LOW WATER ADVISORY IS IN EFFECT FOR THE
BAYS FOR BELOW NORMAL TIDES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SMALL CRAFT ADVISORIES MAY BE NEEDED TUESDAY AS NORTHERLY WINDS
AND SEAS SLOWLY DECREASE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Apr 14, 6:36 AM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
636 AM CDT MON APR 14 2014

TXZ163-141215-
HOUSTON TX-
636 AM CDT MON APR 14 2014

...SPECIAL WEATHER STATEMENT...

AT 635 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
ELKHART...OR 15 MILES SOUTH OF PALESTINE...MOVING EAST AT 35 MPH.

HALF INCH HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
GRAPELAND AND WECHES.

LAT...LON 3158 9526 3157 9522 3159 9517 3156 9514
      3154 9514 3153 9511 3150 9510 3149 9511
      3140 9569 3151 9571 3152 9565 3155 9564
      3159 9527
TIME...MOT...LOC 1135Z 257DEG 32KT 3155 9556

LW

Local storm report, Apr 14, 7:05 AM CDT, 46 minutes before

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Local storm report, Apr 14, 7:06 AM CDT, 45 minutes before

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Local storm report, Apr 14, 7:13 AM CDT, 38 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 10:56 PM CDT	Special Weather Statement	HGX	Burleson	49 min
Apr 13, 11:34 PM CDT	Special Weather Statement	HGX	Brazos	41 min
Apr 14, 4:16 AM CDT	Wind Advisory	HGX	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more	24 hr
Apr 14, 6:36 AM CDT	Special Weather Statement	HGX	Houston	39 min
Apr 14, 6:45 AM CDT	Severe Thunderstorm Warning	HGX	Houston	45 min
Apr 14, 11:50 AM CDT	Special Weather Statement	HGX	Grimes, Walker	40 min
Apr 14, 12:15 PM CDT	Special Weather Statement	HGX	Colorado	45 min
Apr 14, 12:17 PM CDT	Special Weather Statement	HGX	Washington	43 min
Apr 14, 12:34 PM CDT	Severe Thunderstorm Warning	HGX	Colorado	26 min
Apr 14, 1:03 PM CDT	Special Weather Statement	HGX	Colorado	42 min
Apr 14, 3:08 PM CDT	Special Weather Statement	HGX	Wharton	37 min
Apr 14, 3:21 PM CDT	Small Craft Advisory	HGX		25 hr
Apr 14, 3:32 PM CDT	Severe Thunderstorm Warning	HGX	Colorado, Wharton	28 min
Apr 14, 3:56 PM CDT	Severe Thunderstorm Warning	HGX	Fort Bend, Wharton	34 min
Apr 14, 4:25 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Galveston, Harris	50 min
Apr 14, 6:08 PM CDT	Special Weather Statement	HGX	Chambers	22 min

Nearby

Severe Thunderstorm Warnings in Texas, 2014 Every 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.