Area Forecast Discussion
Issued by NWS Dallas/Fort Worth, TX

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FXUS64 KFWD 090551
AFDFWD

Area Forecast Discussion
National Weather Service Fort Worth TX
1151 PM CST Thu Dec 8 2016

.AVIATION...
06 UTC TAF Cycle

Concerns---None major. VFR with northerly winds becoming
southeasterly by Friday afternoon.

VFR is expected to prevail through the entire 06 UTC TAF cycle
across all North and Central TX terminals. The previous cloud
cover has completely scattered with the departure of a weak low
level trough. The 00 UTC FWD RAOB did indicate some residual
moisture around FL070-FL080. With any weak perturbation in the
westerly flow, additional saturation and additional VFR stratus could
develop. This appears to be the case along an ABI to MKN to ACT
line. Additional cloud cover is attempting to creep southward from
Oklahoma as well.

With regards to the forecast, will start Metroplex TAF sites out
with SKC before VFR stratus develops around FL080 during the mid-
morning hours and into the afternoon. For the Waco TAF site, will
continue with a ceiling around FL070 through a majority of the 06
UTC TAF cycle. Northerly winds will eventually become easterly and
southeasterly through Friday afternoon at Metroplex TAF sites and
southeasterly winds are expected around sunset Friday at Waco. In
the extended portion of the forecast, some VFR ceilings may
redevelop just after 06 UTC Saturday, but to keep the TAFs simple,
I`ll abstain from mentioning this at this time.

24-Bain

&&

.UPDATE...
The main band of clouds has moved to the southeast of a Lampasas
to Athens line as of 915 PM and expect them to exit the forecast
area around midnight. Another band of clouds can be seen on
satellite imagery northwest of a line from Jayton to Wichita Falls
to Atoka Oklahoma line. These clouds are moving slowly southeast
and are expected to move into the Red River counties tonight. Have
only made some minor adjustments to the overnight lows and timing
of the clouds. Updates have already been sent.

58

&&

.PREV DISCUSSION... /ISSUED 237 PM CST Thu Dec 8 2016/
Strong surface high pressure, on the order of 1044 mb, will
settle into the Central and Southern Plains tonight behind a
departing shortwave trough. This will result in clearing skies,
drier air and decreasing wind speeds, all of which will promote
efficient radiational cooling. Overnight lows will range from
about 19 in the northwest to the middle 20s across the Metroplex
and the southern zones. The only thing that could potentially keep
temperatures from reaching these values is if the mid cloud deck
is slower in scattering out.

Friday will be a much warmer day even though the morning will
start out very cold. We expect afternoon highs to warm into the
40s under a mostly sunny sky and a light wind.

Progressive zonal flow will prevail through the weekend which will
result in the development of a surface lee trough across the High
Plains and the return of Gulf moisture. The low level warm air
advection pattern will bring near normal temperatures back to the
region with lows in the 40S and highs in the 50s and 60s Saturday
and Sunday. Some warm air advection showers will be possible
Saturday night ahead of a shortwave. The shortwave will move
across North and Central Texas on Sunday and bring a slightly
better chance of showers, especially east of the Interstate 35
corridor where low level moisture will be most abundant.
Instability should be insufficient for any thunder.

The passage of the shortwave trough axis Sunday night will allow
a weak cold front to move into the region. The air behind the
front will be a bit cooler and drier but nothing like the arctic
intrusion that we are currently experiencing.

The upper air pattern will become more amplified next week with a
long wave trough progged to develop across the northern half of
the CONUS with another arctic front expected to infiltrate the
Plains. There are some differences among the extended models with
regards to how deep the trough will become, when the cold front
will arrive in North Texas and if any precipitation will accompany
it. Therefore, we will keep the forecast dry Monday through
Thursday with temperatures near seasonal normals Monday and
Tuesday and below normal Wednesday and Thursday.

79



&&


.PRELIMINARY POINT TEMPS/POPS...
Dallas-Ft. Worth    24  43  31  51  46 /   0   0   0   5  20
Waco                25  45  31  50  47 /   5   0   0  10  20
Paris               21  42  28  48  42 /   0   0   0  10  40
Denton              19  42  28  50  44 /   0   0   0   5  20
McKinney            22  42  28  49  44 /   0   0   0   5  30
Dallas              25  44  32  52  47 /   0   0   0   5  30
Terrell             23  44  30  50  46 /   5   0   0   5  40
Corsicana           25  45  32  51  47 /   5   0   0  10  40
Temple              25  44  32  51  48 /   5   0   0  10  30
Mineral Wells       20  43  28  54  46 /   5   0   0   5  10

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

24/58


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