Special Weather Statement, NWS Amarillo, TX

Area Forecast Discussion...UPDATED
National Weather Service Amarillo TX
1033 PM CDT THU JUL 7 2016

.Aviation...
For the 06z TAFs, VFR conditions are expected at all terminals. KDHT
should be free of rain showers and storms by the time this TAF
issuance is in effect. However, KGUY could see lingering showers and
thunderstorms through the early morning hours on Friday. Confidence
is not too high given the nature of these summer storms, so
amendments are likely during the next several hours. Winds are still
expected to be out of the north to northeast at KDHT and KGUY due to
a weak cold front, although timing could be slightly off due to
impacts from thunderstorms. Winds should stay below 15 KTS for the
majority of the forecast period, although KAMA could see a few hours
during the afternoon tomorrow where winds could gust to 25 KTS or so.
Rain chances return for mainly KDHT and KGUY tomorrow night, however
confidence is low on any storms impacting the TAF sites, so this will
most likely be updated as further TAFs are issued.

Lorenzen

&&

.Prev Discussion... /Issued 844 PM CDT THU JUL 7 2016/

Update...
Have updated the grids slightly to account for higher rain chances
given the light rain showers and storms that are moving into the
western portions of the Oklahoma and Texas Panhandles from the west.
These storms and showers are expected to continue moving eastward
through the central portions of the Combined Panhandles ahead of an
approaching upper level shortwave and associated weak surface cold
front. The rest of the forecast remains on track.

Lorenzen

Prev Discussion... /Issued 615 PM CDT THU JUL 7 2016/

.Updated Aviation Discussion...

Discussion...
Upper level ridge that has been in place across the Texas and
Oklahoma Panhandles for the past several days has shifted slightly to
the south and east throughout the day today. This shift will allow
for a weak shortwave to move out of the Rockies. This increased upper
level support could help a few storms to develop across the area.
Mixed layer instability is fairly limited to around 500 to 1500 J/kg
with very limited deep layer shear except across the Oklahoma
Panhandle where deep layer shear is expected to remain around 30kt to
40kt. Storms that form outside of the better sheared environment
could produce marginally severe wind gusts as the cores descend, but
storms that develop/move into the better sheared environment could
become marginally severe and produce a combination of hail and
damaging severe gusts. all convection should be out of the area after
midnight. As for the heat, the Heat Advisory remains in affect until
8 PM this evening with temperatures across the advisory area in the
103 to 109 range.

Friday the ridge breaks down further to allow a cold front to enter
the Panhandles. This will bring a much needed reprieve from the
triple digit heat for the better part of the area. The front will
also bring better forcing for storm development. The best area for
storm development is focused south of the front (southeastern half of
the Texas Panhandle) during the afternoon hours. There is a low
chance precip across the northwestern CWA but any storms that develop
in that area will be extremely isolated.

Late Friday night into early Saturday morning is expected to be
relatively quiet weather-wise, but by Saturday afternoon storms are
expected to develop along a dryline situated across the western
column of counties. Deep layer shear again looks relatively limited
(in the 20kt range) with mixed layer CAPE around 1500 J/kg. Isolated
strong to marginally severe storms can't be ruled out.

Sunday the ridge re-develops west of the Panhandles to keep the
chance for afternoon convection possible. The ridge shifts further
west to place the Panhandles under southwesterly flow aloft through
the better part of next week. This will help to keep temperatures
closer to average (while still running a few degrees above average)
and precip chances in the forecast into the better part of the work
week.

Aviation...00z TAFs...Showers and thunderstorms have formed in the
western combined Panhandles and are moving northeast towards KDHT &
KGUY to start the period.  Best chance for convection seems to be
near KDHT, which will be handled with VCTS mention.  Will address
KGUY & KAMA with amendments given low confidence at the moment.
Otherwise, southwest wind BTWN 10 to 20 kts with CIG AOA 10k ft AGL
should continue thru the period at KAMA while wind direction will
become northerly AFT 08/05Z as a weak cold front passes thru KDHT &
KGUY.  There is a low chance for thunderstorms at all TAF sites aft
08/18Z, but confidence is too low to mention for now.

Bieda

&&

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

&&

10/98

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
827 PM CDT THU JUL 7 2016

OKZ001>003-TXZ001>020-081330-
CIMARRON-TEXAS-BEAVER-DALLAM-SHERMAN-HANSFORD-OCHILTREE-LIPSCOMB-
HARTLEY-MOORE-HUTCHINSON-ROBERTS-HEMPHILL-OLDHAM-POTTER-CARSON-
GRAY-WHEELER-DEAF SMITH-RANDALL-ARMSTRONG-DONLEY-COLLINGSWORTH-
827 PM CDT THU JUL 7 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...TONIGHT.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS MOST OF THE TEXAS AND
OKLAHOMA PANHANDLES TONIGHT. A FEW WILL HAVE THE POTENTIAL TO BECOME
STRONG TO MARGINALLY SEVERE WITH SMALL HAIL AND WIND GUSTS TO AROUND
60 MPH AS THE PRIMARY HAZARDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THUNDERSTORMS WILL BE POSSIBLE ACROSS MOST OF THE TEXAS AND OKLAHOMA
PANHANDLES FRIDAY THROUGH TUESDAY. THOUGH ORGANIZED SEVERE WEATHER
IS NOT ANTICIPATED...A FEW STORMS THAT DEVELOP MAY BECOME STRONG TO
MARGINALLY SEVERE WITH HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS
TO AROUND 60 MPH THE PRIMARY HAZARDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1010 PM CDT THU JUL 7 2016

OKZ002-003-TXZ003-004-080400-
BEAVER OK-TEXAS OK-HANSFORD TX-OCHILTREE TX-
1010 PM CDT THU JUL 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TEXAS...SOUTHWESTERN
BEAVER...NORTHWESTERN OCHILTREE AND HANSFORD COUNTIES UNTIL 1100 PM
CDT...

AT 1009 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 4
MILES NORTH OF GRUVER...OR 15 MILES NORTHWEST OF SPEARMAN...MOVING
NORTHEAST AT 20 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
PERRYTON...SPEARMAN...GRUVER...WAKA AND FARNSWORTH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3611 10135 3629 10155 3670 10095 3634 10081
TIME...MOT...LOC 0309Z 235DEG 22KT 3632 10143

BIEDA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1029 PM CDT THU JUL 7 2016

OKZ002-TXZ003-080400-
TEXAS OK-HANSFORD TX-
1029 PM CDT THU JUL 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN TEXAS AND NORTH CENTRAL
HANSFORD COUNTIES UNTIL 1100 PM CDT...

AT 1029 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM 7 MILES SOUTH OF GUYMON TO 12 MILES
NORTH OF GRUVER. MOVEMENT WAS NORTHEAST AT 20 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
GUYMON...HOOKER...OPTIMA...HARDESTY AND ADAMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3698 10123 3670 10095 3638 10142 3661 10159
TIME...MOT...LOC 0329Z 226DEG 20KT 3659 10150 3644 10140

BIEDA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1111 PM CDT THU JUL 7 2016

OKZ002-003-TXZ003-004-080500-
BEAVER OK-TEXAS OK-HANSFORD TX-OCHILTREE TX-
1111 PM CDT THU JUL 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TEXAS...SOUTHWESTERN
BEAVER...OCHILTREE AND EASTERN HANSFORD COUNTIES UNTIL MIDNIGHT
CDT...

AT 1111 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM 8 MILES NORTHWEST OF WAKA TO 8 MILES
SOUTH OF SPEARMAN. MOVEMENT WAS NORTHEAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
PERRYTON...SPEARMAN...WAKA AND FARNSWORTH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3657 10073 3641 10055 3639 10055 3606 10090
      3605 10128 3628 10140 3658 10102
TIME...MOT...LOC 0411Z 224DEG 28KT 3639 10112 3608 10124

BIEDA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1208 AM CDT FRI JUL 08 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1155 PM     TSTM WND GST     3 ENE PERRYTON          36.41N 100.75W
07/07/2016  M64 MPH          OCHILTREE          TX   AWOS

&&

EVENT NUMBER AMA1600606

EA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1217 AM CDT FRI JUL 08 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1210 AM     TSTM WND GST     5 W LIPSCOMB            36.24N 100.36W
07/08/2016  M59 MPH          LIPSCOMB           TX   BROADCAST MEDIA

&&

EVENT NUMBER AMA1600607

EA

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