Alert archive / Texas / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 73, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 4, 2000, 1:25 PM CDT for San Jacinto County, Texas. It was in force for 65 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
- May 4, 2000, 1:25 PM CDT (18:25 UTC)
- Expired
- May 4, 2000, 2:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County San Jacinto County, TX
The radar
The Houston radar (KHGX), 119 km from the middle of the area, began a volume at 18:24 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, 6.4 hours before the alert went out and 198 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
- 1094 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
339 WUUS54 KHGX 041826 SVRHOU TXC407-041930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 125 PM CDT THU MAY 4 2000 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SAN JACINTO COUNTY IN SOUTHEAST TEXAS * UNTIL 230 PM CDT * AT 122 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS ACROSS THE SOUTHERN PORTIONS OF THE COUNTY FROM 15 MILES SOUTHWEST OF COLDSPRING TO 10 MILES SOUTHWEST OF SHEPHARD...MOVING NORTHEAST AT 20 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORMS INCLUDE... COLDSPRING POINT BLANK LAKE LIVINGSTON DAM MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. 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 3052 9535 3037 9519 3050 9489 3078 9523
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 May 4, 9:45 AM CDT, 3 hours 40 minutes earlier.
Area forecast discussion, May 4, 9:45 AM CDT, 3 hours 40 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 945 AM CDT THU MAY 4 2000 SHORT UPDATE DUE TO IMPENDING HEAVY WEATHER. WILL ISSUE FLASH FLOOD WATCH FOR LOCATIONS ALONG/NORTH OF I-10. MANY OF THE CLASSIC FACTORS ARE IN PLACE SUCH AS WEAK MID LEVEL FLOW...STATIONARY BOUNDARY... AMPLE MOIST AIR...AND ALREADY SATURATED GROUND. IN ADDITION...THE SEA BREEZE APPEARS TO BE ACTIVE AGAIN TODAY OVER THE SRN ZONES...IT COULD COLLIDE WITH OUTFLOW FROM THE LINE OF STORMS TO THE NORTH AND REALLY SQUEEZE OUT SOME HEAVY AMOUNTS IN METRO HOUSTON. WILL ALSO MAKE CHANGES TO TEMPS/WINDS/CLOUDS REFLECTING EXPECTED CONVECTIVE COVERAGE (E.G. COOLER WHERE IT IS LIKELY TO RAIN ALL DAY). .KHGX...FLASH FLOOD WATCH ALONG/NORTH OF I-10. 31/47 UPDATED PRELIMS... CLL TE 080/068 087/068 087 +34 IAH TE 085/070 087/070 087 733 GLS EB 081/072 081/072 081 422
In the hours before
Special weather statement, May 4, 11:35 AM CDT, 1 hour 50 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>237-050000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1135 AM CDT THU MAY 4 2000 ...MODERATE RISK OF SEVERE THUNDERSTORMS AND HEAVY RAIN THIS AFTERNOON AND EARLY EVENING ACROSS SOUTHEAST TEXAS... ...FLASH FLOOD WATCH IN EFFECT ALONG AND NORTH OF A BRENHAM... CONROE...LIVINGSTON LINE THROUGH 7 PM... THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS AND HEAVY RAIN ACROSS SOUTHEAST TEXAS THIS AFTERNOON AND EARLY EVENING. THE PRIMARY SEVERE WEATHER RISKS ARE LARGE HAIL AND DAMAGING WIND. THE PRIMARY THREAT TIME IS FROM NOON THROUGH 7 PM. HEAVY RAIN IS MOST LIKELY ALONG AND NORTH OF STATE HIGHWAY 105. A SLOW MOVING UPPER LEVEL SYSTEM...STATIONARY FRONT...AND MOIST GULF AIR WILL COMBINE TO PRODUCE SHOWERS AND THUNDERSTORMS ACROSS SOUTHEAST TEXAS TODAY. WIND SHEAR IS SUFFICIENT FOR SOME OF THE STORMS TO BECOME SEVERE AND PRODUCE LARGE HAIL OR DAMAGING WINDS. MID-LEVEL WINDS APPEAR TO FAVOR STORMS THAT MOVE SLOWLY AND OVER THE SAME LOCATIONS...WHICH WILL RESULT IN HEAVY RAIN. EXPECT AVERAGE RAINFALL TOTALS OF 1 TO 2 INCHES NORTH OF STATE HIGHWAY 105...WITH SOME LOCATIONS RECEIVING UP TO 4 INCHES OF RAIN BY EARLY EVENING. EXPECT AVERAGE RAINFALL AMOUNTS OF 1/2 TO 1 INCH FOR METRO HOUSTON... WITH SOME SPOTS RECEIVING UP TO 2 INCHES OF RAIN. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA TODAY FOR THE LATEST FORECASTS...UPDATES...AND POSSIBLE WATCHES OR WARNINGS. 31/JWZ
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 1:03 AM CDT | Severe Thunderstorm Warning | HGX | Houston | 42 min |
| May 4, 1:08 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 37 min |
| May 4, 1:30 PM CDT | Flash Flood Warning | HGX | Liberty, Polk, San Jacinto | 5 hr |
| May 4, 1:38 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery | 52 min |
| May 4, 1:44 PM CDT | Tornado Warning | HGX | Liberty | 46 min |
| May 4, 2:08 PM CDT | Severe Thunderstorm Warning | HGX | Grimes | 52 min |
| May 4, 2:24 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Liberty | 51 min |
| May 4, 3:00 PM CDT | Severe Thunderstorm Warning | HGX | Grimes | 45 min |
| May 4, 3:15 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 60 min |
| May 4, 3:37 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 53 min |
| May 4, 3:50 PM CDT | Flash Flood Warning | HGX | Brazos, Grimes, Montgomery, Washington | 3 hr |
| May 4, 4:13 PM CDT | Severe Thunderstorm Warning | HGX | Washington | 62 min |
| May 4, 4:30 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 45 min |
| May 4, 4:30 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Waller | 60 min |
| May 4, 4:57 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 48 min |
| May 4, 5:12 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 63 min |
| May 4, 5:32 PM CDT | Severe Thunderstorm Warning | HGX | Austin | 43 min |
| May 4, 5:33 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris | 42 min |
| May 4, 5:36 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 24 min |
| May 4, 5:40 PM CDT | Severe Thunderstorm Warning | HGX | Waller | 50 min |
| May 4, 6:15 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 45 min |
| May 4, 6:35 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 55 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; radar from the NEXRAD Level II archive.