Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 193, NWS Houston/Galveston, TX

August 27, 2003Grimes County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 27, 2003, 6:28 PM CDT for Grimes County, Texas. It was in force for 47 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
Aug 27, 2003, 6:28 PM CDT (23:28 UTC)
Expired
Aug 27, 2003, 7:15 PM CDT
In force
47 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

County Grimes County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.5 hours before the alert went out and 283 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 12:00Z on 2003-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 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 12:00Z on 2003-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1292 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1087 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
58 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 Aug 27, 2:15 PM CDT, 4 hours 13 minutes earlier.

Area forecast discussion, Aug 27, 2:15 PM CDT, 4 hours 13 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
215 PM CDT WED AUG 27 2003

SCT SHWRS AND TSTMS ARE DEVELOPING AREAWIDE THIS AFTERNOON AS
CONVECTIVE TEMPS HAVE BEEN REACHED. EXPECT SCT ACTIVITY TO CONTINUE
TO DEVELOP THROUGH THE EVENING HOURS ACROSS THE INLAND ZONES...WITH
ONLY ISOLATED DEVELOPMENT ACROSS THE COASTAL ZONES THIS EVENING
BEHIND THE SEA BREEZE BOUNDARY.

EXPECT TOMORROW AND FRIDAY TO BE SIMILAR TO TODAY. MODEL GUIDANCE IS
INDICATING THAT POPS WILL BE HIGHER IN THE SCT RANGE TOMORROW AS A
WEAK MID-LEVEL DISTURBANCE REMAINS OVER THE REGION AND COMBINES WITH
A VERY MOIST AND AN UNSTABLE ATMOSPHERE. PW VALUES WILL REMAIN
SLIGHTLY ABOVE 2 INCHES FOR THE FORESEEABLE FUTURE. DAYTIME HEATING
WILL BE THE MAIN DRIVER FOR THE INLAND ACTIVITY.

UNFORTUNATELY THE FORECAST BECOMES A LOT MORE UNCERTAIN LATE THIS
WEEKEND AND INTO NEXT WEEK AS THERE IS LITTLE CONSISTENCY BETWEEN
THE GLOBAL MODELS AND EVEN BETWEEN THEIR OWN SUCCESSIVE RUNS
CONCERNING THE POTENTIAL FOR TROPICAL CYCLONE DEVELOPMENT IN THE
NORTHERN CARIBBEAN...GULF...OR BAHAMAS. AT THIS POINT WILL NOT
CHANGE THE ONGOING FORECAST WHICH HAS A CHANCE OF SHOWERS AND
THUNDERSTORMS EACH DAY. WE WILL JUST HAVE TO WAIT A COUPLE OF DAYS
TO SEE IF THE MODELS CAN CONVERGE ON A GIVEN SOLN AND TO SEE IF WE
HAVE A PARTICULAR AREA THAT APPEARS TO BE GETTING BETTER
ORGANIZED.

I DO NOT THINK THAT A COLD FRONTAL PASSAGE IS VERY LIKELY ON SUN/MON
GIVEN THE UPPER LEVEL PATTERN. WE MAY BRIEFLY SEE A NORTH WIND BASED
ON THE ORIENTATION OF THE SFC PRESSURE PATTERN...BUT ANY BOUNDARY
WILL LIKELY BECOME DIFFUSE NORTH OF OUR AREA OR ACROSS THE EXTREME
NORTHERN PORTIONS OF THE AREA.

33/40

.HGX...NONE.

PRELIMS...
CLL BB 075/094 075/094 075 353
IAH BB 076/093 076/093 076 353
GLS BB 081/090 081/090 081 252
Hazardous weather outlook, Aug 27, 7:00 AM CDT, 11 hours 28 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-281200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
700 AM CDT WED AUG 27 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.