Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 22, NWS Houston/Galveston, TX

March 26, 2000Walker County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 26, 2000, 5:04 AM CST for Walker County, Texas. It was in force for 56 min. 1 report 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: Mar 26, 2000, 5:04 AM CST (11:04 UTC)
Expired: Mar 26, 2000, 6:00 AM CST
In force: 56 min
Issued by: NWS Houston/Galveston, TX
Area: Whole counties

County Walker County, TX

The radar

The Houston radar (KHGX), 149 km from the middle of the area, began a volume at 11:03 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
Mar 26, 5:25 AM CST	Hail 1.75	Riverside, TX

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 26, 4:30 AM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.1 hours before the alert went out and 238 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 18 J/kg
Mixed-layer CIN: -230 J/kg
Mixed-layer LCL: 1028 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KHGX 261103
SVRHOU
TXC471-261200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
504 AM CST SUN MAR 26 2000

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

* SEVERE THUNDERSTORM WARNING FOR...
  WALKER COUNTY IN SOUTHEAST TEXAS

* UNTIL 600 AM CST

* AT 500 AM CST...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 
  ENTERING NORTHERN WALKER COUNTY CENTERED 15 MILES NORTH OF CRABBS 
  PRAIRIE...MOVING SOUTHEAST AT 40 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  CRABBS PRAIRIE
  RIVERSIDE
  HUNTSVILLE

DAMAGING WINDS ARE THE MAIN THREAT WITH THIS LINE.

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...LlON 3098 9554 3085 9581 3064 9573 3054 9558
          3055 9542 3068 9536 3085 9537

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 Mar 26, 3:00 AM CST, 2 hours 4 minutes earlier.

Area forecast discussion, Mar 26, 3:00 AM CST, 2 hours 4 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
300 AM CST SUN MAR 26 2000

OUTFLOW BOUNDARY CURRENTLY LOCATED JUST NORTH OF FA STRETCHING FROM
NEAR ACT TO GGG. SVR TSTMS OCCURRING IN VCNTY OF BOUNDARY NW OF FA
AND ARE PROPAGATING SE ACROSS WATCH BOX. APPEARS NORTHERN SECTIONS
OF FA WILL SEE GOOD CHC OF TSTMS NEXT FEW HOURS.

MAIN FORECAST CONCERN IS SVR WX POTENTIAL. ATMOS IS POTENTIALLY
UNSTABLE WITH CONVECTIVE COMPLEX PROPAGATING SE TONIGHT TOWARDS FA.
BELIEVE SOUTHWARD EXTENT OF COMPLEX THIS MORNING IS CRITICAL FOR
ASSESSING AFT DEVELOPMENT BECAUSE DIFFERENTIAL HEATING ACROSS LEFT
OVER OUTFLOW BOUNDARY WILL PLAY A KEY ROLE FOR 1ST PD POPS. MAY
ADJUST POPS AT ISSUANCE TIME BASED ON CONVECTIVE TRENDS.

AGREE WITH SPC DY1 OUTLOOK PLACING MOST OF AREA IN SLIGHT RISK.
UPPER LEVEL JET AXIS BECOMES ORIENTED OVER SE TX AS PATN
AMPLIFICATION OCCURS AND 120 KT JET MAX DIVES SE ACROSS TX THIS
EVENING. THIS FEATURE WILL PROVIDE FAVORABLE UPPER LEVEL DIVERGENCE
NEAR TIME OF MAX HEATING THIS AFT INTO OVERNIGHT HOURS. IN
ADDITION...AXIS OF WEAK MID-LEVEL SHORT WV ENERGY WILL BE ACROSS FA
TODAY AND TONIGHT. ONE SIGNIFICANT FORECAST PROBLEM IS DECIDING ON
NORTHWARD EXTENT OF CAPPING LAYER PRESENT IN 0Z CRP SOUNDING. SW
ZONES MAY REMAIN CAPPED WHERE NORTHERN ZONES WILL BE IN NEAR CAP-
FREE ENVIRONMENT. THIS IS THE REASON FOR TAPERING OF POPS FROM THE
NORTH SOUTHWARD AND EXCLUSION OF SW ZONES FROM SVR OUTLOOK.

FAVOR AVN PRECIP FIELD WHICH IS FURTHEST SOUTH OF MODELS. HAVE DECIDED
TO FORECAST ABOVE GUIDANCE.

MODELS IN GOOD AGREEMENT WITH MOVEMENT OF COLD FRONT ACROSS FA
SUNDAY NIGHT. THIS BOUNDARY WILL PROVIDE FOCUS TONIGHT FOR TSTM
DEVELOPMENT. WILL MAKE A FEW ADJUSTMENTS TO TEMP GUID...MAINLY 3RD
AND 4TH PDS. AS FRONT ENTERS COASTAL WATERS OFFSHORE WINDS WILL
INCREASE MON MORNING.

THANKS LCH FOR COORD.

33/41

.KHGX...SVR TSTM WATCH N UNTIL 5 AM

PRELIMS...
CLL BU 084/057 080/050 077 340
IAH BU 084/060 080/050 077 240
GLS BU 078/065 076/062 076 231
SW                         12-
N                          540

In the hours before

Special weather statement, Mar 25, 11:56 PM CST, 5 hours 8 minutes before

TXZ163-164-179-261100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1156 PM CST SAT MAR 25 2000

...SEVERE THUNDERSTORM WATCH UNTIL 5 AM CST FOR HOUSTON...TRINITY...
AND POLK COUNTIES...

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED BY THE STORM PREDICTION
CENTER FOR THE FAR NORTHERN PORTION OF SOUTHEAST TEXAS.  THE WATCH
INCLUDES THE CITIES OF GRAPELAND...CROCKETT...GROVETON...APPLE
SPRINGS...CORRIGAN...AND LIVINGSTON.

STRONG TO SEVERE THUNDERSTORMS OCCURRED EARLIER THIS EVENING OVER
FREESTONE COUNTY NEAR FAIRFIELD.  THESE STORMS WERE APPROACHING FAR
NORTHWESTERN HOUSTON COUNTY...BUT WERE WEAKENING AS OF 1145 PM.
OTHER THUNDERSTORMS WERE OCCURRING IN THE DALLAS-FORT WORTH
METROPLEX AREA AND ARE EXPECTED TO APPROACH HOUSTON...TRINITY...AND
POLK COUNTIES BETWEEN 3 AM AND 5 AM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN.  MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.  IF
OUTSIDE...MOVE TO SHELTER...PREFERABLY INSIDE A STRONG BUILDING.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR THE LATEST
FORECASTS AND} UPDATES.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 26, 4:14 AM CST	Severe Thunderstorm Warning	HGX	Houston	61 min
Mar 26, 4:33 AM CST	Severe Thunderstorm Warning	HGX	Madison	57 min
Mar 26, 5:12 AM CST	Severe Thunderstorm Warning	HGX	Trinity	48 min
Mar 26, 5:30 AM CST	Severe Thunderstorm Warning	HGX	San Jacinto	60 min
Mar 26, 6:04 AM CST	Severe Thunderstorm Warning	HGX	Polk	41 min
Mar 26, 6:10 AM CST	Severe Thunderstorm Warning	HGX	Liberty	65 min
Mar 26, 7:15 AM CST	Severe Thunderstorm Warning	HGX	Chambers, Liberty	45 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000 Every 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.