Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 167, NWS Amarillo, TX

October 28, 2000Potter County, Randall County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Oct 28, 2000, 2:40 PM CDT for Potter County, Randall County, Texas. It was in force for 35 min. 2 reports 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: Oct 28, 2000, 2:40 PM CDT (19:40 UTC)
Expired: Oct 28, 2000, 3:15 PM CDT
In force: 35 min
Issued by: NWS Amarillo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Potter County, TX, Randall County, TX

The radar

The Amarillo radar (KAMA), 22 km from the middle of the area, began a volume at 19:43 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
Oct 28, 3:06 PM CDT	Thunderstorm Wind 52 E	Amarillo, TX
Oct 28, 3:10 PM CDT	Thunderstorm Wind 59 E	Amarillo, TX	A sign was blown down...large trees were blown over and a fence was reported damaged.

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
Oct 28, 9:45 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 7.7 hours before the alert went out and 23 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: 1598 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 241 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 281943
SVRAMA
TXC375-381-282015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
240 PM CDT SAT OCT 28 2000

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN POTTER COUNTY IN THE TEXAS PANHANDLE
  NORTHERN RANDALL COUNTY IN THE TEXAS PANHANDLE

* UNTIL 315 PM CDT

* AT 242 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES WEST OF CANYON...MOVING NORTHEAST AT
  55 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  AMARILLO...CANYON...BUFFALO LAKE...BUSHLAND...LAKE TANGLEWOOD...
  PALO DURO CANYON AND UMBARGER

DESTRUCTIVE WINDS IN EXCESS OF 55 MPH CAN BE EXPECTED. GO TO AN 
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID 
WINDOWS!

LAT...LON 3536 10216 3488 10216 3495 10163 3547 10163

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 Oct 28, 4:01 AM CDT, 10 hours 39 minutes earlier.

Area forecast discussion, Oct 28, 4:01 AM CDT, 10 hours 39 minutes before

TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
401 AM CDT SAT OCT 28 2000

SCT CONVECTION BREAKING OUT ACROSS FA THIS MORNING IN ADVANCE OF MAIN
SYSTEM ALONG AZ/MEXICO BORDER. INITIAL JET STREAK AND UPSLOPE
FLOW PROVIDING MORE ORGANIZED AND WIDESPREAD ACTIVITY ACROSS
CNTRL/NRN NM MTNS. MODELS IN GENERALLY GOOD AGREEMENT WITH
SYSTEM LIFTING NE AND DEEPENING WITH TIME...CENTER POSITIONED NR
CIMARRON COUNTY BY 06Z SUN. EXPECT CONTINUED SCT STORMS TO DEVELOP
IN ADVANCE OF DEVELOPING SQUALL LINE ACROSS ERN NM THROUGH REMAINDER
OF MORNING IN H8/H7 WAA PATTERN. WITH SPEED SHEAR AND LLVL VEERING
AHEAD OF ADVANCING CDFNT WILL GO AHEAD AND MENTION SVR IN ZNS.
ISOLD HEAVY RAINFALL ALSO A THREAT. 3H FFG VALUES RUNNING NR 1.5
INCHES WITH LOWEST AMOUNTS IN WRN ZNS. EXPECT STORMS TO BE FAST
MOVING WITH SOME TRAINING CELLS EARLY ON THEN LINE SHOULD BOW WITH
ISOLD HEAVY RAINS TRACKING NE WITH TIME. WILL NOT ISSUE WATCH AS
LOCATION DIFFICULT TO PIN DOWN AND COVERAGE SPOTTY.

WINDY CONDITIONS SHOULD DEVELOP BY AFTN ACROSS MOST OF AREA AS SFC
LOW DEVELOPS ACROSS NE NM. LOW PROGD TO DEEPEN THROUGH 06Z SO WINDS
EXPECTED TO STAY UP FOLLOWING FROPA. WILL START SECOND PERIOD OUT
WINDY THEN DIMINISH ALONG WITH CLOUDS TOWARD MIDNIGHT. A FEW SHRA
WILL PROBABLY LINGER THROUGH EARLY SUN MORNING UNDER COLD CORE OF LOW
SO WILL CARRY HIGHER POPS N AND E.

DRIER AIR WILL MOVE IN ON SUN IN WAKE OF SYSTEM. GRADIENTS REMAIN
STRONG ENOUGH EARLY SUN TO CARRY BREEZY/WINDY CONDITIONS IN
MORNING. WITH SUNSHINE EXPECT TEMPS TO WARM INTO 60S.

IN EXTENDED...
NEXT UPPER LOW DROPS INTO SW U.S. EARLY NEXT WEEK THEN PROGRESSES
EWD INTO PLAINS BY EARLY WED. HEIGHTS FALL THROUGH THIS TIME SO
PRECIP CHCS WILL START OFF LOW DURING DAY MON AND INCREASE AS
SYSTEM NEARS. CURRENT FCST HAS WED DRY BUT MAY NEED TO ADD CHCS
MAINLY FOR TUE NIGHT IF SYSTEM SLOWS FURTHER.

.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
Oct 28, 1:55 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith	35 min
Oct 28, 4:46 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	29 min
Oct 28, 5:02 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Roberts	28 min
Oct 28, 5:11 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Wheeler	49 min
Oct 28, 5:28 PM CDT	Tornado Warning	AMA	Roberts	32 min
Oct 28, 5:50 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb	40 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.