Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 135, NWS Amarillo, TX

June 23, 2000Hansford County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 23, 2000, 11:24 PM CDT for Hansford County, Texas. It was in force for 66 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: Jun 23, 2000, 11:24 PM CDT (04:24 UTC)
Expired: Jun 24, 2000, 12:30 AM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Whole counties

County Hansford County, TX

The radar

The Amarillo radar (KAMA), 121 km from the middle of the area, began a volume at 04:25 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
Jun 23, 11:30 PM CDT	Hail 0.75	Spearman, 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 4.4 hours before the alert went out and 121 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: 375 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2319 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 240425
SVRAMA
TXC195-240530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1124 PM CDT FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HANSFORD COUNTY IN THE TEXAS PANHANDLE

* UNTIL 1230 AM CDT

* AT 1124 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES WEST OF SPEARMAN...MOVING EAST AT 25
  MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  SPEARMAN

LARGE HAIL...DAMAGING WINDS...AND TORRENTIAL RAINS ARE EXPECTED WITH
THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER.

LAT...LON 3640 10159 3608 10161 3607 10s112 3625 10109
          3642 10109

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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 3:14 PM CDT, 8 hours 10 minutes earlier.

Area forecast discussion, Jun 23, 3:14 PM CDT, 8 hours 10 minutes before

TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
314 PM CDT FRI JUN 23 2000

SATL/RADAR DEPICTS WEAK CONVERGENCE AXIS FM BEAVER-BGD-AMA WITH
HIGHEST CAPE VALUES E OF THERE. CONVECTION BECOMING BETTER ORGANIZED
ATTM TO S OF FA ON EDGE OF MOIST PLUME ADVECTING N FM TROPICS.
TRADITIONAL DEVELOPMENT ALSO OCCURRING ACROSS NE NM ALONG OUTFLOW
BOUNDARIES FM PREVIOUS CONVECTION. DECIDED TO INCREASE POPS FIRST
PERIOD NRN ZNS WITH PROSPECTS OF LARGE CONVECTIVE CLUSTER MOVING E
ACROSS THAT REGION WITH LESSER POPS THOUGH AT LEAST SCT ACROSS SRN
ZNS. PROFILERS INDICATING SPEED MAX MOVING THROUGH CENTRAL NM MAY
AID DEVELOPMENT N (SEE LATEST SWOMCD).

AM CONCERNED MODELS NOT HANDLING MID/UPPER LEVEL MOISTURE ADVECTION
ALL THAT WELL. WITH PROSPECTS OF MOISTURE PLUME BOWING N WITH TIME...
CONTINUED TREND OF HIGHER THAN MOS POPS ESP NIGHTTIME. WILL PLACE
HIGHEST POPS NRN ZNS THROUGH MON AS MODELS INDICATE WIND SHIFT
ENTERING NRN ZNS ON SAT WITH COOLER AIR SETTLING INTO FA ON SUN.
SHRTWV TROUGH OVER AZ ALSO FCST TO SHEAR EWD ON SAT GIVING SOME
UPPER SUPPORT. AS TEMPS FCST TO WARM ALOFT...PRECIP MAY TAKE LONGER
TO DEVELOP EXCEPT IN ERN ZNS WHERE SFC TROUGH WILL HELP REACH
CONVECTIVE TEMPS.

IN EXTENDED...
UPSLOPE FLOW CONTINUES ON MON AS SFC HIGH BUILDS S INTO PLAINS.
FLATTENED RIDGE ACROSS CNTRL TX WL FCST TO BUILD W WITH TIME THOUGH
IN NO BIG HURRY. SMALL DISTURBANCES IN FLOW AROUND HIGH COUPLED WITH
ABUNDANT MID/HIGH LEVEL MOISTURE ARGUES FOR CONTINUED CHC OF LATE
AFTN/NIGHTTIME CONVECTION UNTIL PATTERN CHANGES.

.AMA...
TX...NONE.
OK...NONE.

COBB

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 9:15 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	30 min
Jun 23, 9:43 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	47 min
Jun 23, 9:48 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	57 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.