Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 133, NWS Houston/Galveston, TX

August 11, 2000Chambers County, Galveston County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 11, 2000, 5:45 PM CDT for Chambers County, Galveston County, Texas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 11, 2000, 5:45 PM CDT (22:45 UTC)
Expired
Aug 11, 2000, 6:30 PM CDT
In force
45 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Chambers County, TX, Galveston County, TX

The radar

The Houston radar (KHGX), 73 km from the middle of the area, began a volume at 22:44 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, 10.8 hours before the alert went out and 122 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 2000-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 296 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 2000-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
296 J/kg
Mixed-layer CIN
-188 J/kg
Mixed-layer LCL
1358 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KHGX 112246
SVRHOU
TXC071-167-112330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
545 PM CDT FRI AUG 11 2000

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GALVESTON COUNTY IN SOUTHEAST TEXAS
  CHAMBERS COUNTY IN SOUTHEAST TEXAS

* UNTIL 630 PM CDT

* AT 543 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
  NEAR WINNIE...MOVING SOUTH-SOUTHWEST AT 25 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  STOWELL...WINNIE
  HIGH ISLAND
  ANAHUAC NATIONAL WILDLIFE REFUGE
  BOLIVAR PENINSULA

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR 
BUSINESS. STAY AWAY FROM WINDOWS! DAMAGING WINDS TO 60 MPH ARE 
INDICATED. LARGE HAIL IS ALSO POSSIBLE.

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 2990 9426 2993 9446 2942 9459 2938 9431

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 11, 3:30 PM CDT, 2 hours 15 minutes earlier.

Area forecast discussion, Aug 11, 3:30 PM CDT, 2 hours 15 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
330 PM CDT FRI AUG 11 2000

WILL BE BUMPING UP FIRST PERIOD POPS A BIT. CONVECTION BUILDING TO
OUR E. GIVEN VERY UNSTABLE CONDITIONS...IT SHOULD KEEP GOING INTO
THIS EVENING...WITH ISOLD DAMAGING WIND GUSTS/HAIL PSBL. WILL
MENTION SVR POSSIBLE IN CTRL AND ERN ZONES.

NEW ZFP OUT AT 345.

46/43/48

.HGX...NONE.

PRELIMS...
CLLA BB 072/102 073/101 073 2-00 (30 POP NE TNGT)
IAH BB 074/097 074/096 074 3100
GLS BB 079/091 080/091 080 3100

In the hours before

Special weather statement, Aug 11, 3:15 PM CDT, 2 hours 30 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>238-120300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
315 PM CDT FRI AUG 11 2000

...SEVERE WEATHER POSSIBLE THIS EVENING...

...ANOTHER HOT WEEKEND EXPECTED OVER SOUTHEAST TEXAS...

TEMPERATURES THIS AFTERNOON EXCEEDED 100 DEGREES THIS AFTERNOON IN AN
AREA FROM LUFKIN TO COLLEGE STATION...AND WILL REACH A HIGH NEAR 100
FURTHER SOUTH IN SPOTS SUCH AS CONROE AND HUNTSVILLE. EVEN THOUGH
TEMPERATURES FURTHER SOUTH NEAR THE COAST ARE SLIGHTLY LOWER...
HUMIDITY LEVELS ARE HIGHER...MAKING IT FEEL JUST AS UNCOMFORTABLE.

THE HEAT IS MAKING THE ATMOSPHERE VERY UNSTABLE. THIS COMBINED WITH A
FRONT ENTERING THE REGION FROM THE NORTHEAST WILL GENERATE SHOWERS
AND THUNDERSTORMS THROUGH THIS EVENING. SOME OF THE STORMS COULD BE
SEVERE...ESPECIALLY EAST OF THE BRAZOS RIVER. BE ALERT FOR THE
POSSIBILITY OF DAMAGING WIND GUSTS AND HAIL IN ANY THUNDERSTORMS.

THE HEAT WILL CONTINUE THIS WEEKEND. TEMPERATURES WILL BE IN THE 90S
WITHIN ABOUT 50 MILES OF THE COAST...AND NEAR 100 FURTHER NORTH. THE
BEST CHANCES FOR ANY SHOWERS AND THUNDERSTORMS WILL BE THIS EVENING.

IF YOU ARE PLANNING TO BE OUTSIDE THIS WEEKEND...REMEMBER A FEW
SIMPLE RULES TO KEEP YOU COOL IN THE HEAT...

1) DRINK PLENTY OF LIQUIDS...EXCEPT AVOID THOSE WITH ALCOHOL OR
CAFFEINE.

2) WEAR LIGHT COLORED LOOSE FITTING CLOTHING. A LIGHT COLORED HAT
IS ALSO A GOOD WAY TO AVOID OVERHEATING SINCE IT REFLECTS SUNLIGHT
AWAY FROM YOUR HEAD.

3) TAKE FREQUENT BREAKS IN THE SHADE OR INSIDE IN AN AIR-CONDITIONED
ENVIRONMENT.

4) DECREASE PHYSICAL ACTIVITY DURING THE AFTERNOON AND EVENING...WHEN
TEMPERATURES ARE AT THEIR PEAK.

5) WEAR SUNSCREEN.

KEEP ABREAST OF THE LATEST FORECAST FROM YOUR FAVORITE MEDIA OUTLET
OR NOAA WEATHER RADIO. THE HOUSTON/GALVESTON NATIONAL WEATHER
SERVICE WEBSITE IS AVAILABLE ON THE INTERNET AT
HTTP://WWW.SRH.NOAA.GOV/HGX.

Nearby

Severe Thunderstorm Warnings in Texas, 2000Every severe thunderstorm warning in 2000

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.