821
FXUS64 KMAF 291640
AFDMAF

Area Forecast Discussion
National Weather Service Midland/Odessa TX
1140 AM CDT Wed May 29 2024

...New AVIATION...

.SHORT TERM...
(Today through Thursday afternoon)
Issued at 340 AM CDT Wed May 29 2024

outflow and a few lingering storms have pushed into the area but
winds gradually veer back to the background environmental
southeasterly direction by morning. Stratus has also moved in behind
this outflow and storms, and is expected to linger across the north-
central Permian Basin until it finally scatters out. This stratus
will serve to not only keep the northern zones in the 80s for high
temperatures this afternoon, but also prevent much instability from
forming. With the weak ridge axis moving this afternoon, some
subsidence-induced capping should inhibit most afternoon convection
outside of a storm or two off the Stockton Plateau. Should any
storms get rooted and going, there will be plenty of CAPE above the
cap (~2000-2500J/kg) to feed off of along with generally long,
straight hodographs that favor splitting supercells. As per usual, a
left mover or two could shoot into the east-central Permian Basin
this afternoon with a right mover tearing through east-central Pecos
County. In addition to the scattered storm chances, the other
headline today will be the continued heat, especially the Davis
Mountains and Big Bend where another Heat Advisory has been issued
this afternoon due to the prolonged heat.

Return flow Wednesday night into Thursday once again primes our
region with plentiful moisture for storms. This coincides with the
ridge sliding eastward, giving way to a weak shortwave across the
Panhandle. Between this, diurnal heating, and convergence along the
dryline should be enough to get a few thunderstorms to form. With a
similar convective setup to Wednesday, any storms that form could be
strong to severe with damaging winds and large hail being the main
concerns. The prolonged heat sticks around still on Thursday, with
another Heat Advisory anticipated for similar areas as today with
highs ranging in the upper 90s to the 100s with temperatures 110+ in
the lower elevations of Big Bend National Park.

-Munyan

&&

.LONG TERM...
(Thursday night through Tuesday)
Issued at 340 AM CDT Wed May 29 2024

Thursday night, an upper trough will be moving through the region,
with convection expected to be ongoing east of a retreating dryline.
To complicate matters further, a cold front is forecast to drop in
behind the trough after 06Z. East of the dryline, 40-60 kts of 0-6
km shear is forecast, w/mid-level laps rates of 7-9 C/km, for a
sever threat into late evening.

This cold front will usher in cooler temperatures Friday and
Saturday.  Friday, highs will be near or just above normal most
locations, with a slight chance of showers and thunderstorms, a few
severe, along/behind the front.  This may be reinforced by incoming
boundaries from the northeast from a possible MCV.

The MCV will push even cooler air into the area Friday night, making
Saturday the coolest day this forecast as highs top out right around
normal.  Saturday morning, the dryline is forecast to be in far west
Texas.  To the west, an upper trough will approach the region, and
this will meet up with easterly upslope flow for perhaps our best
shot at rainfall this forecast.  With any luck, the higher terrain
west of the Pecos will get some rainfall, where it`s needed most at
the moment.  QPF is paltry, but beggars can`t be choosers.

Sunday, return flow resumes, and temperatures begin to recover as
upper-level ridging begins strengthening south.  Long range models
bring a shortwave through the ridge, and this could kick off some
isolated afternoon convection along/east or the dryline.

Unfortunately, models are still on track to develop the quasi-
stationary upper ridge over Mexico Monday/Tuesday, sending highs
each day into the triple digits most locations.  By Tuesday, highs
will be ~ 10-12 F above normal, and grids stay dry after Sunday. The
only consolation is that the dryline hasn`t retreated to El Paso
yet, so there may be a couple more opportunities for rain before the
Death Ridge locks in. But time is running out.

&&

.AVIATION...
(18Z TAFS)
Issued at 1139 AM CDT Wed May 29 2024

VFR will prevail through the period as low CIGs burn off over the
next hour. Winds will remain out of the east and southeast.

&&

.FIRE WEATHER...
Issued at 340 AM CDT Wed May 29 2024

Elevated fire weather conditions are expected through next week,
mainly over the higher terrain west of the Pecos on the west side of
a developing dryline each day.  Critical minimum relative humidities
will coincide with increased 20-ft winds each afternoon.  ERCs
remain above the 95th percentile in these areas.  However, fuel
density and limited opportunities for fire starts remain low.  The
one exception will be Saturday afternoon, when the dryline will be
far enough west that lightning starts will be possible in the
Sacramento Foothills, Guadalupes, and areas directly south to the
Presidio Valley.

&&

.PRELIMINARY POINT TEMPS/POPS...
Big Spring               89  68  95  68 /  20  10  20  20
Carlsbad                 95  64 100  63 /  10   0   0   0
Dryden                   98  73  98  71 /  20  20  10  10
Fort Stockton           100  69 102  68 /  20  10  10   0
Guadalupe Pass           90  63  89  64 /   0   0   0   0
Hobbs                    88  64  96  62 /  20  10  10  10
Marfa                    95  55  96  53 /  10   0   0   0
Midland Intl Airport     92  69  97  68 /  20  10  10  10
Odessa                   93  70  98  69 /  20  10  10  10
Wink                     98  69 103  66 /  10  10   0   0

&&

.MAF WATCHES/WARNINGS/ADVISORIES...
TX...Heat Advisory until 9 PM CDT this evening for Central Brewster
     County-Chisos Basin-Davis Mountains-Davis Mountains
     Foothills-Lower Brewster County.

NM...None.
&&

$$

SHORT TERM...16
LONG TERM....44
AVIATION...29