Alert archive / Texas / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 123, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 30, 2000, 6:42 PM CDT for Polk County, Trinity County, Texas. It was in force for 48 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 30, 2000, 6:42 PM CDT (23:42 UTC)
- Expired
- Jul 30, 2000, 7:30 PM CDT
- In force
- 48 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Polk County, TX, Trinity County, TX
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.7 hours before the alert went out and 194 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.
- Mixed-layer CAPE
- 1841 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 892 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 30, 2:30 PM CDT, 4 hours 12 minutes earlier.
Area forecast discussion, Jul 30, 2:30 PM CDT, 4 hours 12 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 230 PM CDT SUN JUL 30 2000 CONVECTION ONGOING OVER THE SRN 2/3 OF THE CWA EARLY THIS AFTERNOON. THE MAIN FORECAST ISSUE IS CONVECTION...WHICH WILL BE AFFECTED BY THE LOCATION OF BOUNDARIES...OCCASIONAL UPPER LEVEL SUPPORT...AND DECREASING PRECIP WATER TREND. THE SHORT TERM MODELS ARE IN GOOD AGREEMENT SYNOPTICALLY EXCEPT FOR THE CENTRAL GULF SYSTEM THE AVN/MRF GENERATE BY MIDWEEK. AGREE WITH NHC/HPC GUIDANCE THAT TROPICAL DEVELOPMENT IS UNLIKELY. PREFER THE ETA FOR MOST ELEMENTS...WITH TEMPS SOMETHING NEAR AN FWC/FAN AVERAGE..THE MAV GUIDANCE LOOKING TOO WARM. OVERALL...THE MAIN FRONTAL BOUNDARY WILL SAG SOUTH...STALL...AND WEAKEN OVER SERN TX. CONVECTIVE OUTFLOW BOUNDARIES AND THE SEABREEZE WILL PROVIDE EXTRA FOCI. AN UPPER LEVEL SHORTWAVE WILL AID CONVECTION ON TUE...AND PRECIP WATER WILL DECREASE ABOUT 1/4 INCH EACH DAY FROM NEARLY 2 INCHES TODAY TO 1.75 MON...AND 1.5 TUE. WINDS ARE AND FORECAST TO BE WEAK AT ALMOST EVERY LEVEL...INDICATING NO MAJOR SEVERE THREAT...BUT SLOW MOVING STORMS...ECHO TRAINING... AND THUS THE THREAT OF HEAVY RAIN. SO MUCH WILL DEPEND ON THE MESOSCALE THAT SPECIFICS WILL BE DIFFICULT...ESPECIALLY BEYOND THE FIRST TWO PERIODS. SUFFICE TO SAY POPS WILL BE LOWER IN THE NORTH...HIGHEST ALONG THE COAST...A BIT HIGHER TUE THAN MON...AND SCT COVERAGE IN THE EXTENDED PERIOD. WILL ISSUE AN HAZARDOUS WEATHER OUTLOOK FOR HEAVY RAIN...ALTHOUGH MOST LOCATIONS WILL SIMPLY BENEFIT FROM SOAKING RAINS. .HGX...NONE. 31/38 PRELIMS... CLL BB 070/094 071/094 071 2324 IAH EE 072/092 072/093 072 5434 GLS TT 080/088 078/089 079 7535
In the hours before
Special weather statement, Jul 30, 3:45 PM CDT, 2 hours 57 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>238-310930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 345 PM CDT SUN JUL 30 2000 ...HEAVY RAIN THREAT ACROSS SOUTHEAST TEXAS MONDAY AND TUESDAY... A WEAK FRONT WILL STALL OVER SOUTHEAST TEXAS TONIGHT...THEN REMAIN STATIONARY THROUGH TUESDAY. MOIST GULF AIR AND WEAK UPPER LEVEL DISTURBANCES WILL COMBINE WITH THE FRONT TO PRODUCE ROUNDS OF SHOWERS AND THUNDERSTORMS...ESPECIALLY FROM THE AFTERNOON THROUGH EARLY EVENING HOURS MONDAY AND TUESDAY. STEERING WINDS ARE WEAK...INDICATING STORMS WILL MOVE SLOWLY. IN ADDITION...THE STATIONARY FRONT AND WEAK OUTFLOWS WILL GUIDE STORMS OVER THE SAME AREAS...BRINGING THE THREAT OF HEAVY RAIN. RAINFALL AMOUNTS COULD AVERAGE 1/2 TO 1 AND 1/2 INCHES PER DAY...WITH ISOLATED TOTALS UP TO 5 INCHES POSSIBLE AT SOME SPOTS FOR BOTH DAYS. STAY TUNED TO NOAA WEATHER RADIO OR OTHER RELIABLE WEATHER NEWS SOUfRCES FOR THE LATEST FORECASTS AND UPDATES. 31
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 4:39 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 51 min |
| Jul 30, 6:03 PM CDT | Severe Thunderstorm Warning | HGX | Polk | 42 min |
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.