Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 99, NWS Houston/Galveston, TX

May 19, 2000Harris County, Texas

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

TimeReportWhereRemark
May 19, 7:40 PM CDTThunderstorm WindKingwood, TXTrees down.
May 19, 7:55 PM CDTThunderstorm WindCrosby, TXTrees 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.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2000-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 701 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 00:00Z on 2000-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.19395878Sfc1 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
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
May 19, 8:46 PM CDTTornado WarningHGXLiberty59 min
May 19, 8:49 PM CDTFlash Flood WarningHGXHarris, Liberty116 min
May 19, 9:20 PM CDTFlash Flood WarningHGXWaller3 hr
May 19, 10:35 PM CDTFlash Flood WarningHGXHarris, Liberty, Montgomery100 min
May 19, 10:45 PM CDTTornado WarningHGXBrazoria45 min
May 19, 11:17 PM CDTSevere Thunderstorm WarningHGXLiberty43 min
May 19, 11:25 PM CDTTornado WarningHGXBrazoria50 min
May 19, 11:30 PM CDTTornado WarningHGXLiberty30 min
May 19, 11:33 PM CDTFlash Flood WarningHGXBrazoria3 hr
May 20, 12:00 AM CDTFlash Flood WarningHGXBrazoria, Chambers, Fort Bend, Harris, Liberty, Waller and 1 more5 hr
May 20, 12:25 AM CDTTornado WarningHGXChambers, Liberty65 min
May 20, 2:02 AM CDTSevere Thunderstorm WarningHGXGalveston28 min
May 20, 2:22 AM CDTTornado WarningHGXChambers, Galveston38 min
May 20, 4:59 AM CDTFlash Flood WarningHGXHarris, Liberty3 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.