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

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FXUS64 KFWD 250924
AFDFWD

Area Forecast Discussion
National Weather Service Fort Worth TX
424 AM CDT Sun Jun 25 2017

.DISCUSSION...
In western and northern zones, a few locations have dipped into
the 60s early this morning, a treat for late June. However, the
northerly winds will begin veering today, signaling an end to the
cold advection. The onset of a warming trend will be somewhat
offset by cloud cover. Despite some abatement of the humidity
within the postfrontal air, considerable moisture remains above
the frontal inversion. Temperatures will still reach the mid 80s
in many areas this afternoon. The only locations that could
struggle to top 80 degrees will be in across our southern zones,
where the proximity of the frontal boundary will mean both more
persistent cloudiness and scattered showers/storms.

Showers and thunderstorms have quickly developed early this
morning within East Texas, where the cross-boundary component of
850mb moisture is maximized. New development is occurring as far
west as the I-45 corridor, and additional development is likely
later this morning. The bulk of the convective activity will
remain south of the surface front, deep within the maritime
tropical air mass. But with a lingering weakness in the mid-levels
from the Sunday morning deluge, renewed development is expected
across the southern half of our CWA today as the postfrontal air
begins eroding and surface heating destabilizes the boundary
layer. This type of summer setup leads to generally unorganized
convection with weak updrafts, thus showers should outnumber
thunderstorms. Lightning will be the primary hazard for outdoor
activities today, but a downpour on already soaked ground could
renew some flooding issues.

A similar scenario may play out on Monday with steadily rising
temperatures. In addition, as northwest flow aloft becomes better
organized, upstream activity (or its convectively-induced
vorticity) may enter the region, allowing for rain chances farther
north, particularly in areas west of the I-35 corridor. This
pattern will prevail again on Tuesday, but the lack of any well
defined impulse should mean that sunshine dominates. By Wednesday
and Thursday, ridging will begin impinging on the region though a
col or inverted trough will dominate across the Texas coast.
Afternoon convection, akin to sea breeze activity, may affect
portions of Central and East Texas.

It still appears that another cold front could approach late in
the week, but extended guidance is trending farther north with the
southern extent of the associated mid-level trough. Considerable
climatology is working against the earlier solutions, and we have
trended the late week PoPs farther north accordingly. Regardless
of how this brief event plays out, subtropical ridging looks to
take hold quickly as July begins.

25

&&

.AVIATION... /Issued 1135 PM CDT Sat Jun 24 2017/
Dry air continues to advect southwestward across the forecast area
following this morning`s front. This should keep conditions
generally VFR in the DFW Metroplex through the overnight hours,
with mainly patchy low clouds to occasionally deal with. Farther
south, Waco is closer to what is now a quasi-stationary front,
which means KACT has a better chance of experiencing MVFR Cigs
during the Early morning hours Sunday. Showers may periodically
develop in the vicinity of the front, which will warrant a VCSH
at KACT for Sunday.

30

&&

.PRELIMINARY POINT TEMPS/POPS...
Dallas-Ft. Worth    86  71  88  71  89 /  10  10  10  10  10
Waco                84  71  88  69  89 /  40  30  30  20  20
Paris               85  65  87  67  88 /   5   5  10   5   5
Denton              86  68  88  68  89 /   5  10  10  10  10
McKinney            86  67  88  68  89 /   5   5  10  10  10
Dallas              87  72  89  72  90 /  10  10  10  10  10
Terrell             86  68  89  69  90 /  10   5  10  10  10
Corsicana           83  70  88  71  89 /  30  10  20  10  10
Temple              83  70  86  69  87 /  40  40  30  20  30
Mineral Wells       85  68  86  68  88 /  20  10  20  10  20

&&

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

$$

25/58



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