Alert archive / Texas / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 99, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 19, 2000, 7:25 PM CDT for Harris County, Texas. It was in force for 35 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 19, 2000, 7:25 PM CDT (00:25 UTC)
- Expired
- May 19, 2000, 8:00 PM CDT
- In force
- 35 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Harris County, TX
The radar
The Houston radar (KHGX), 52 km from the middle of the area, began a volume at 00:26 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 19, 7:40 PM CDT | Thunderstorm Wind | Kingwood, TX | Trees down. |
| May 19, 7:55 PM CDT | Thunderstorm Wind | Crosby, TX | Trees down in Crosby and Huffman. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.4 hours before the alert went out and 213 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
- 701 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
675 WUUS54 KHGX 200026 SVRHOU TXC201-200100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 725 PM CDT FRI MAY 19 2000 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEAST HARRIS COUNTY IN SOUTHEAST TEXAS * UNTIL 800 PM CDT * AT 718 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER KINGWOOD...MOVING NORTHEAST AT 5 MPH. LOOK FOR NICKLE TO QUARTER SIZE HAIL WITH THIS STORM. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... KINGWOOD AND COMMUNTIES IN EXTREME NORTHEAST HARRIS COUNTY 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.
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 19, 2:50 PM CDT, 4 hours 35 minutes earlier.
Area forecast discussion, May 19, 2:50 PM CDT, 4 hours 35 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 250 PM CDT FRI MAY 19 2000 UPPER LEVEL ENERGY MOVING ACROSS W TEXAS EXPECTED TO APPROACH OUR CWFA THIS EVENING. RR QUAD AND UPPER LEVEL DIFFLUENCE IN PLACE. FRONTAL BOUNDARY WILL SAG SOUTHWARD OVERNIGHT. PW VALUES WILL APPROACH 2 INCHES CLOSE TO FRONTAL BOUNDARY. EXPECT BOUNDARY TO MOVE SLOWLY ACROSS NORTHERN ZONES TONIGHT...HENCE WILL ISSUE FFA FOR TONIGHT FOR NORTH AND NORTHWESTERN ZONES (HAVE COORDINATED W/WFOS EWX AND FWD ON THIS). EVENING SHIFT WILL HAVE TO MONITOR THIS CLOSELY AND DEPENDING ON EXPECTED PROGRESSION...MAY HAVE TO EXTEND AREA SOUTHWARD. UPPER LEVEL ENERGY WILL EXIT REGION SATURDAY. MESO-ETA INDICATE WEAK FRONTAL BOUNDARY SURGING NORTHWARD SATURDAY. NEXT UPPER LEVEL ENERGY WILL APPROACH REGION (W/IN NORTHWEST FLOW) LATER SUNDAY. PROGGED ETA SOUNDING INDICATE QUITE MOIST UNSTABLE AIR MASS ON SUNDAY. STILL UNCERTAIN ON WHAT POSSIBLE MESO EVENT MAY DEVELOP LATE IN THE WEEKEND BUT WILL DEFINITELY GO HIGHER THAN GUIDANCE NUMBERS ESPECIALLY FOR NORTHERN ZONES. MARINE AREA CALLS FOR SCATTERED CONVECTION THROUGH THE FORECAST PERIOD. DO NOT BELIEVE THAT ANY MCS ACTIVITY TO THE NORTH WILL PROPAGATE FAR SOUTH TO COASTAL WATERS. 31/37 .KHGX...FLASH FLOOD WATCH TONIGHT FOR BURLESON...BRAZOS...MADISON... HOUSTON...TRINITY...WALKER...GRIMES...WASHINGTON...AUSTIN...AND COLORADO COUNTIES. CLL TT 068/084 067/087 068 8534 IAH CE 071/085 069/087 070 6434 GLS CE 075/083 073/083 075 5434
In the hours before
Special weather statement, May 19, 3:37 PM CDT, 3 hours 48 minutes before
TXZ176-177-195>199-211-212-200300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 337 PM CDT FRI MAY 19 2000 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR NORTHWESTERN PORTIONS OF SOUTHEAST TEXAS FROM 4 PM UNTIL 10 PM. COUNTIES THE WATCH AREA INCLUDE: AUSTIN...BRAZOS...BURLESON...GRIMES...MADISON...MONTGOMERY...WALKER... WALLER...AND WASHINGTON COUNTIES. LEON...MILAM AND ROBERTSON COUNTIES IN CENTRAL TEXAS ARE ALSO INCLUDED IN THE WATCH AREA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION SERVICE PROVIDER FOR LATER STATEMENTS CONCERNING THIS SEVERE WEATHER THREAT.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 8:46 PM CDT | Tornado Warning | HGX | Liberty | 59 min |
| May 19, 8:49 PM CDT | Flash Flood Warning | HGX | Harris, Liberty | 116 min |
| May 19, 9:20 PM CDT | Flash Flood Warning | HGX | Waller | 3 hr |
| May 19, 10:35 PM CDT | Flash Flood Warning | HGX | Harris, Liberty, Montgomery | 100 min |
| May 19, 10:45 PM CDT | Tornado Warning | HGX | Brazoria | 45 min |
| May 19, 11:17 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 43 min |
| May 19, 11:25 PM CDT | Tornado Warning | HGX | Brazoria | 50 min |
| May 19, 11:30 PM CDT | Tornado Warning | HGX | Liberty | 30 min |
| May 19, 11:33 PM CDT | Flash Flood Warning | HGX | Brazoria | 3 hr |
| May 20, 12:00 AM CDT | Flash Flood Warning | HGX | Brazoria, Chambers, Fort Bend, Harris, Liberty, Waller and 1 more | 5 hr |
| May 20, 12:25 AM CDT | Tornado Warning | HGX | Chambers, Liberty | 65 min |
| May 20, 2:02 AM CDT | Severe Thunderstorm Warning | HGX | Galveston | 28 min |
| May 20, 2:22 AM CDT | Tornado Warning | HGX | Chambers, Galveston | 38 min |
| May 20, 4:59 AM CDT | Flash Flood Warning | HGX | Harris, Liberty | 3 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.