Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 156, NWS Austin/San Antonio, TX

July 27, 2000DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 27, 2000, 5:52 PM CDT for DeWitt County, Lavaca County, Texas. It was in force for 53 min. 1 report came from 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, with what was reported inside it.

The facts

Issued
Jul 27, 2000, 5:52 PM CDT (22:52 UTC)
Expired
Jul 27, 2000, 6:45 PM CDT
In force
53 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 93 km from the middle of the area, began a volume at 22:51 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
Jul 27, 6:00 PM CDTHail 1Yoakum, 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 nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.9 hours before the alert went out and 161 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, Corpus Christi, TX at 12:00Z on 2000-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2895 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, Corpus Christi, TX at 12:00Z on 2000-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.193958Sfc1 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
2895 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 272253
SVRSAT
TXC123-285-272345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
552 PM CDT THU JUL 27 2000

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  LAVACA COUNTY
  DEWITT COUNTY

* UNTIL 645 PM CDT

* AT 552 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES SOUTHEAST OF YOAKUM...MOVING WEST AT 15
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR YOAKUM AT 610 PM CDT
  OVER HOCHHEIM AT 640 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.


LAT...LON 2909 9762 2910 9705 2926 9689 2936 9725

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 27, 5:15 PM CDT, 37 minutes earlier.

Area forecast discussion, Jul 27, 5:15 PM CDT, 37 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
515 PM CDT THU JUL 27 2000

ADDED 20 PERCENT POPS TO SOUTHERN COUNTIES PER LATEST SATELLITE AND
RADAR TRENDS.

--------------------------------------------------------------------
AFTERNOON DISCUSSION...

HOT LATE JULY WEATHER EXPECTED THROUGH FRIDAY AND SATURDAY
AFTERNOON.  SUBTROPICAL HIGH IS STILL FCST TO RETREAT WEST SATURDAY
THRU TUESDAY...AS S/W TROF WEST OF LOW ALOFT APPROACHES AREA SUNDAY
AND IS FCST TO BE VCNTY OF AREA MONDAY AND PSBLY TUESDAY.  THIS
PATTERN...IF IT MAKES THE MARK...SIGNALS A SOME CHC OF SUMMER
SHOWERS OR THUNDERSTORMS POSSIBLY SUNDAY THRU TUESDAY.  DATA ALSO
SHOWS PSBL WEAK FRONT/OUTFLOW BNDRY NEAR AREA LATE SUNDAY THROUGH
TUESDAY.  COMPOSITE DATA ALSO SHOWS WEAKNESS IN RIDGE ALOFT
DEVELOPING OVR AREA SUNDAY AND MONDAY...AND FOR OVERALL NEXT
WEEK SHOWS RIDGE PATTERN COULD STREGTHEN SOME TUE/WED...THEN
WEAKEN AGAIN LATE NEXT WEEK.  OVERALL...MEDIUM RANGE DATA SUGGEST
SUBTROP HI WILL NOT BE AS STRONG ALOFT OVR AREA NEXT WEEK...AS
HI CENTER MOVES WEST AND WEAKNESS IN HEIGHT FIELD ALOFT FORMS
OVR AREA.

.PRELIMINARY NUMBERS
AUS 073/099/073/098 000-
SAT 075/099/075/098 000-
DRT 079/103/079/102 -0-0
---------------------------------------------------------------------

.EWX...NONE.

18/3

In the hours before

Special weather statement, Jul 27, 4:00 PM CDT, 1 hour 52 minutes before
TXZ171>173-183>194-202>209-217>225-228-280400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
400 PM CDT THU JUL 27 2000

...JULY 2000 SUMMER HEAT WILL CONTINUE THROUGH FRIDAY...

HOT LATE JULY...SOUTH TEXAS...SUMMER DAYS ACROSS PARTS OF THE HILL
COUNTRY...CENTRAL AND SOUTH CENTRAL TEXAS EXPECTED THROUGH FRIDAY.
AFTERNOON HIGHS ARE EXPECTED TO BE 96 TO NEAR 100 OVER EAST PARTS OF
SOUTH CENTRAL TEXAS AND NEAR 100 TO NEAR 107 OVER WESTERN PARTS OF
SOUTH CENTRAL TEXAS.  OVERNIGHT AND EARLY MORNING LOWS ARE EXPECTED
TO BE IN THE 70S.

A FEW IDEAS TO MAKE THE HOT SUMMER DAY MORE BEARABLE...THUS REDUCING
THE RISK OF SUNBURN AND OTHER HEAT RELATED PROBLEMS IS LISTED BELOW.

REDUCE AS MUCH AS POSSIBLE EXPOSURE TO THE SUN.  USE OF HATS...
LIGHTWEIGHT AND LIGHT COLORED CLOTHING...SUNGLASSES AND SUN
SHADES...AND SHADY AREAS WHERE POSSIBLE...WILL HELP MAKE FOR
A BETTER DAY.  IF OUT IN THE SUN...AVOID AS MUCH AS POSSIBLE
EXPOSURE TO BOTH LIGHT COLORED SURFACES OR MATERIALS THAT
REFLECT THE SUNS HEAT...WHERE YOU CAN GET THE DOUBLE AFFECTS
OF THE SUNS ENERGY...FROM THE SUN ITSELF AND A SURFACE THAT
REFLECTS ITS LIGHT AND HEAT.

AVOID STRENUOUS ACTIVITIES DURING THE HOT PART OF THE DAY...
BY RESCHEDULING THESE ACTIVITIES TO A COOLER PART OF THE DAY
OR ANOTHER DAY.

AVOID WORK ON OR NEAR ROOFTOPS...ESPECIALLY IN THE HOTTEST PART OF
THE DAY...WHERE TEMPERATURES CAN BE TENS OF DEGREES HOTTER THAN THE
AIR.

WATER AND OTHER NON-ALCOHOLIC BEVERAGES ARE MORE HELPFUL DURING
THE HEAT OF SUMMER...AND REDUCE THE RISKS OF DEHYDRATION.

AVOID STOP AND GO TRAFFIC AS MUCH AS POSSIBLE.  THESE SITUATIONS ARE
HARD ON VEHICLES AND INCREASE THE RISK OF OVERHEATING AN ENGINE.

PETS CAN ALSO SUCCUMB TO THE EFFECTS OF EXCESSIVE HEAT.  INSURE PETS
HAVE ADEQUATE DRINKING WATER AND A SHADY PLACE TO REST.  PETS IN CARS
WITH WINDOWS ROLLED UP...EVEN PARTIALLY IS VERY DANGEROUS.
TEMPERATURES INSIDE A CAR WITH THE WINDOWS UP CAN REACH OVER 150
DEGREES QUICKLY...RESULTING IN HEAT STROKE AND DEATH.

ONE OF THESE DAYS...COOLER WEATHER WILL COME.  IN THE
MEANTIME...THE IDEAS LISTED ABOVE WILL HELP MAKE WAY:S TO GET
AROUND OR DEAL WITH THE SUMMER WEATHER.

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.