Special Weather Statement, NWS Amarillo, TX

Area Forecast Discussion
National Weather Service Amarillo TX
233 PM CDT Fri May 7 2021

.SHORT TERM...Today through Tomorrow Night...
Upper level ridge is currently over the Rockies to the west and
will continue to move east over the Panhandles today. A surface
trough extending from a lee low in southeast Colorado has been a
perfect boundary for some afternoon convection to initiate along.
Temperatures are into the mid to upper 80s with plenty of
convective heating with no capping inversion in place across West
Texas and eastern New Mexico. Dewpoints are in the upper 40s to
lower 50s with a very dry boundary layer and inverted "V"
sounding, along with extremely steep lapse rates high LCLs. Only
about 500-1000 J/kg of MLCAPE is present with 20 to 30 knot shear,
so large hail up to quarters is possible but not the main threat.
The main threat will be damaging wind gusts with DCAPE values up
to 1000 J/kg and winds of up to 70 knots possible. Storms are
expected to move east southeast across the Panhandles and once the
sun begins to set, the severe threat will quickly diminish and the
storm potential will end by 11 PM.

The leading edge of the upper level trough over the Great Basin
will put the Panhandles under southwest winds aloft tomorrow.
Surface winds will remain from the southwest through most of the
day as a surfaced closed low forms across the Colorado/Kansas
border. Temperatures will warm well into the 80s and even lower
90s with plenty of mixing in the boundary layer with breezy winds
expected through most of the day. The surface low will push
southeast tomorrow night with a cold front expected to come
through the Panhandles as early as 9-10 PM and be through the
entire Panhandles by around Midnight to 1 AM. There is a slight
chance for some storms behind the front as the upper level trough
swings across the Panhandles late tomorrow, but at this time it
appears most of these chances will remain to the north. If the
front passes through much faster, the chance for precipitation
will decrease as well.

Rutt

&&

.FIRE WEATHER...Saturday...
Elevated to critical fire weather conditions are possible
tomorrow across the far western Panhandles. RFTIs are around 5 to
7 with minimum relative humidity values around 7 to 8 percent and
breezy winds of 20 to 30 mph. Fuels are somewhere around the 50th
to 70th percentile due to recent rainfall over the past week.
However, the fuels remain cured in the far west so the potential
for fire starts remains a concern. A Fire Weather Watch will be
issued and contingent upon the potential for some substantial
precipitation across the west today with the showers and
thunderstorms.

Rutt

&&

.LONG TERM...Sunday through Thursday

Zonal flow aloft Sunday will allow for perturbations across the
central and southern Rockies westward across the Four Corners
region and the Great Basin Sunday afternoon to track east and
trigger scattered convection around 21Z Sunday across eastern
Colorado and the eastern Plains of New Mexico. This convection
will continue moving east and southeast across the western and
central Panhandles by 00Z to 03Z Monday. Additional convection
will spread across much of the forecast area Sunday night into
Monday morning.

Closed upper low and upper trough will track east out of the
central Rockies, the Four Corners region and southwestern states
by Monday evening. Convection expected to develop during the
overnight hours Monday night into Tuesday across most of the
Panhandles as the closed upper low tracks across the central
Plains states with the upper trough approaching or moving into the
forecast area by late Tuesday. Another final chance for precip
Tuesday night into Wednesday morning as the last shortwave trough
approaches the Panhandles. Northwesterly flow aloft will keep the
Panhandles generally dry Wednesday afternoon through Thursday,
although the possibility for some weak perturbations tracking
southeast out of the central and southern Rockies could allow for
isolated convection over the Oklahoma or far northern Texas
Panhandles Thursday afternoon. Confidence is low at this time and
will maintain a dry forecast for now.

Cold front well south and east of the Panhandles Sunday as surface
high builds down from the north. Surface low develops over New
Mexico on the western periphery of the frontal boundary Sunday
evening which then track south into southeastern New Mexico. A
reinforcing surge of cooler air Sunday night into Monday morning
will allow for increasing upslope surface flow. Surface high over
Kansas Monday and across the central Plains states Tuesday into
Wednesday will maintain a much cooler and more moist upslope
surface flow. The surface ridge will dislodge Wednesday afternoon
through Wednesday night as surface trough develops across eastern
Colorado and eastern New Mexico. Surface flow transitions from
upslope to downslope by Thursday as southwesterly winds return and
pressure gradient tightens up resulting in gusty winds Thursday.
Much warmer and drier with breezy or windy conditions Thursday.

Schneider

&&

.PRELIMINARY POINT TEMPS/POPS...
Amarillo TX                58  91  51  75  45 /  60   0   0   5  20
Beaver OK                  57  94  48  71  42 /  60   0   5   5  40
Boise City OK              53  88  44  68  39 /  20   0  10  20  60
Borger TX                  61  95  53  76  47 /  60   0   0   5  30
Boys Ranch TX              57  91  51  76  46 /  60   0   0   5  30
Canyon TX                  57  92  51  77  45 /  60   0   0   5  20
Clarendon TX               61  93  56  75  47 /  50   0   0   0  20
Dalhart TX                 51  88  45  72  39 /  50   0   0  10  40
Guymon OK                  57  92  48  70  41 /  40   0   5   5  40
Hereford TX                57  91  51  78  45 /  50   0   0   5  20
Lipscomb TX                58  94  51  73  44 /  60   0   5   0  30
Pampa TX                   59  92  52  73  44 /  70   0   0   5  20
Shamrock TX                59  96  55  76  46 /  50   0   5   0  20
Wellington TX              60  96  56  78  47 /  30   0   5   0  10

&&

.AMA Watches/Warnings/Advisories...
TX...None.
OK...None.

&&

23/11

Hazardous Weather Outlook
National Weather Service Amarillo TX
245 PM CDT Fri May 7 2021

OKZ001>003-TXZ001>020-317-081200-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
245 PM CDT Fri May 7 2021

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms are expected to develop through this evening across
the Oklahoma and Texas Panhandles. Some storms may become strong
to severe with large hail and damaging winds the primary hazards.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Thunderstorms will be possible across much of the Oklahoma and
Texas Panhandles Sunday afternoon through Tuesday night. Any
storms that form are expected to remain below severe levels at
this time.

Critical fire weather conditions will be possible Saturday due to
receptive fuels, strong southwesterly winds and low afternoon
relative humidity values across the far western Texas and Oklahoma
Panhandles. A Fire Weather Watch has been issued for this area for
Saturday afternoon through Saturday evening.

.SPOTTER INFORMATION STATEMENT...

Spotter groups and emergency management officials should remain
alert and be ready for possible activation through this evening.

Critical fire weather conditions will be possible across the far
western Panhandles Saturday.

Schneider

Special Weather Statement
National Weather Service Amarillo TX
353 PM CDT Fri May 7 2021

OKZ001-002-072200-
Cimarron OK-Texas OK-
353 PM CDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TEXAS AND EASTERN
CIMARRON COUNTIES UNTIL 500 PM CDT...

At 353 PM CDT, Doppler radar was tracking a strong thunderstorm near
Keyes, or 13 miles east of Boise City, moving east at 25 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Keyes, Eva, Griggs and Sturgis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3662 10247 3690 10254 3693 10227 3692 10188
      3657 10188 3657 10226
TIME...MOT...LOC 2053Z 268DEG 20KT 3676 10226

Guerrero

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Special Weather Statement
National Weather Service Amarillo TX
433 PM CDT Fri May 7 2021

TXZ011-072230-
Oldham TX-
433 PM CDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN OLDHAM COUNTY UNTIL 530
PM CDT...

At 433 PM CDT, Doppler radar was tracking a strong thunderstorm 14
miles north of Glenrio, or 16 miles south of Nara Visa, moving east
at 40 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Adrian.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3562 10304 3562 10250 3525 10243 3527 10304
TIME...MOT...LOC 2133Z 260DEG 35KT 3538 10313

Guerrero

Special Weather Statement
National Weather Service Amarillo TX
438 PM CDT Fri May 7 2021

TXZ001-006-072245-
Hartley TX-Dallam TX-
438 PM CDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DALLAM AND NORTHERN
HARTLEY COUNTIES UNTIL 545 PM CDT...

At 438 PM CDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Sedan, or 15 miles northeast of Amistad, moving
east at 40 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Dalhart, Hartley and Ware.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3626 10304 3635 10232 3583 10229 3587 10304
TIME...MOT...LOC 2138Z 260DEG 35KT 3607 10294

Guerrero

Special Weather Statement
National Weather Service Amarillo TX
447 PM CDT Fri May 7 2021

TXZ007-011-012-072245-
Potter TX-Moore TX-Oldham TX-
447 PM CDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN OLDHAM...POTTER AND
SOUTHWESTERN MOORE COUNTIES UNTIL 545 PM CDT...

At 447 PM CDT, Doppler radar was tracking a strong thunderstorm 5
miles south of Boys Ranch, or 16 miles northeast of Vega, moving east
at 25 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Vega, Boys Ranch, Masterson, Four Way and Valley De Oro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3563 10219 3563 10216 3564 10216 3574 10188
      3536 10174 3529 10193 3523 10245 3552 10249
TIME...MOT...LOC 2147Z 254DEG 23KT 3544 10224

Guerrero

Special Weather Statement
National Weather Service Amarillo TX
449 PM CDT Fri May 7 2021

OKZ003-072245-
Beaver OK-
449 PM CDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BEAVER COUNTY UNTIL 545
PM CDT...

At 448 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles south of Floris, or 10 miles west of Beaver, moving east at 25
mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Beaver, Forgan, Mocane and Floris.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3670 10031 3667 10075 3691 10079 3700 10039
      3700 10036
TIME...MOT...LOC 2148Z 258DEG 22KT 3681 10072

Guerrero