Area Forecast Discussion
Issued by NWS Midland/Odessa, TX

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337
FXUS64 KMAF 211700
AFDMAF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1200 PM CDT Mon Jul 21 2014

.DISCUSSION...
See 18Z aviation discussion below.

&&

.AVIATION...
VFR conditions are expected at southeast New Mexico and southwest
Texas terminals through mid-day Tuesday. There is a slight chance
of thunderstorms mainly near the mountains of southeast New Mexico
and southwest Texas and nearby areas including PEQ and CNM. The
probability of occurrence of thunderstorms at these sites is too
low for inclusion in upcoming terminal forecasts. Winds in and
near these thunderstorms will be variable and gusty. Otherwise, no
significant weather is expected through mid-day Tuesday.

&&

.PREV DISCUSSION... /ISSUED 552 AM CDT Mon Jul 21 2014/

DISCUSSION...

The latest Aviation Discussion is included below.

AVIATION...

VFR conditions will prevail at all southeast New Mexico and West
Texas TAF sites during the next 24 hours.  Thunderstorms which
develop this afternoon could affect kPEQ, KCNM, KINK and KHOB this
afternoon or evening.  However, probabilities are too low to include
in the current TAF issuance.  67

PREV DISCUSSION... /ISSUED 412 AM CDT Mon Jul 21 2014/

Above normal temperatures are expected the next seven days
as an upper level ridge of high pressure builds across the
southern Rockies eastward to the southern Plains. At the
surface a lee trough is forecast to remain in place across
extreme west Texas/eastern New Mexico many days through the next
week. More very intense heating along the surface trough with
upslope flow in the mountains combined with trapped mid level
moisture underneath the upper ridge should generate mainly
afternoon and evening isolated to scattered thunderstorms across
the Guadalupe and Davis Mountains, southeast New Mexico Plains,
portions of the upper Trans Pecos through Tuesday. Weak steering
flow and instability could produce locally heavy rainfall both
today and Tuesday afternoon and evening. High temperatures once
again will be around 105 degrees along the Rio Grande river from
southern Terrell county westward to the Big Bend and Presidio
valley. Will issue a heat advisory through 12Z Wednesday morning
due to high temperatures expected to be at or above 105 degrees
along the Rio Grande with low temperatures expected to be 75 to
80.

Beyond Tuesday the upper high center is forecast to strengthen
and mid level moisture will become limited. Precipitation chances
do not appear high enough at this time to mention in the weather
grids Wednesday through next Monday. Temperatures will continue
to be much above normal. The heat advisory may need to be expanded
both in time and location.

&&

.MAF WATCHES/WARNINGS/ADVISORIES...
NM...NONE.
TX...HEAT ADVISORY until 7 AM CDT Wednesday FOR THE FOLLOWING ZONES...
      Big Bend Area...Presidio Valley...Terrell.


&&

$$

05

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