Special Weather Statement, NWS Midland/Odessa, TX

Area Forecast Discussion
National Weather Service Midland/Odessa TX
636 AM CDT Sun Jul 11 2021

...New AVIATION...

.AVIATION...
(12Z TAFS)
Issued at 629 AM CDT Sun Jul 11 2021

Previous MVFR ceilings have receded back to the east at KFST with
low deck making zero headway to the north the last few hrs. Hi
res guidance backing off low cigs now at all terminals, so have
removed the MVFR prevailing lines and tempos in place from
previous TAF cycle. Area convection well NE of KMAF is struggling
to press into the Permian Basin, so expecting little impact this
morning locally from this round.

More development of convection expected later this afternoon
along the front as it moves south. Current progs show the 21-00z
time frame as initiation point across the northern 4 terminals.
Have added prevailing lines outlining VCTS where TS probs ramp up
for expected development. WS to NE expected for SE NM terminals
and KMAF/KINK due to frontal passage around time of convection.
Low cigs possible end of TAF cycle, but a lot contingent on what
happens with PM convection.

&&

.SHORT TERM...
(Today through Monday afternoon)
Issued at 248 AM CDT Sun Jul 11 2021

An active 24 hr period ahead as a summer "cold" front makes its way
into our neck of the woods today. Current positioning of the front
is still up across the Caprock north of Lubbock, extending back to
the Red River over near the OK/TX border. A line of convection along
the boundary exists still well to the NE of the forecast area, but
expectation is for the convection to slowly move towards the NE
Permian Basin by the morning, but amount of coverage is still up for
debate. There is a decent pocket of MLCAPE still nestled over the NE
Basin according to Mesoanalysis this evening, but there's sufficient
capping present ahead of the boundary. Ascent will obviously be
maximized along the front as it approaches, but the diurnal min of
available energy in the AM may thwart the first potential round of
convection as the front still takes some time to reach the forecast
area.

By the afternoon, that will all change as diurnal heating across the
region will allow for an initiation of convection along the front as
it bisects the northern half of the region. The current hi res
analysis shows a few different evolutions for the PM convective
cycle, but they all have a similar degree of coverage for areas of
the Western Permian out into Southeast NM where combo of frontal and
terrain induced ascent will assist in widespread convection chances
over the aforementioned area. More thunderstorms will develop along
the front further east, but coverage is still a question mark as a
lot will be contingent on AM convection and whether the atmosphere
will need to time to recover. The less active this morning, the
greater the areal extent of storms to the east. Severe risk will
also be marginal given the forecasted MLCAPE b/w 2000-2500 j/kg
during the mid-late afternoon time frame along with weak shear.
Damaging winds and large hail will be the primary concerns with
multicell mergers the predominant storm mode as it propagates south
with the front and attendant outflows.

Storms will continue into the evening with a southward push of the
boundary, but loss of diurnal heating after sunset will limit the
convective potential heading into late Sunday night and early
Monday. This will be the end of the storm threat for the region, and
probably the last widespread coverage for quite a while considering
the evolving pattern (More on this in the Long Term Disco Below).

Temps will remain below normal with the cooler of the two days today
due to the post frontal environment and widespread cloud cover. 80s
will be the most common temp profile with 90s still confined along
the Pecos and Rio Grande Valleys.

&&

.LONG TERM...
(Monday night through Saturday)
Issued at 248 AM CDT Sun Jul 11 2021

Not many changes to the long term, and not many targets of
opportunity, either.  Monday night, the upper-level ridge is
forecast to straddle the CA/NV border, and meander down to SoCal by
midweek, leaving a col between it and the ridge over the Gulf coast
states.  A sfc trough will build east into our western zones by
Thursday, resulting in a chance of convection over the higher
terrain each afternoon into the weekend, especially w/regards to the
ECMWF.  Best chances look to be Saturday.

W/the upper ridge staying well out of West Texas and Southeast New
Mexico, and the col over the region, unseasonably cool temperatures
will continue into the extended.  NBM numbers continue to look
reasonable, bespeaking a gradual warmup through Thursday as
thicknesses increase, then coming down slightly w/the development of
the sfc trough out west and expected convection into the weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
Big Spring               87  69  86  71 /  40  40  10   0
Carlsbad                 87  68  89  69 /  50  40  10   0
Dryden                   91  72  91  71 /  20  20  10   0
Fort Stockton            90  68  89  69 /  20  30  10   0
Guadalupe Pass           81  63  81  66 /  40  40  10  10
Hobbs                    84  65  86  67 /  60  30  10   0
Marfa                    86  61  85  60 /  20  20  20   0
Midland Intl Airport     85  68  87  70 /  30  40  10   0
Odessa                   86  68  87  70 /  30  30  10   0
Wink                     89  69  91  71 /  30  30   0   0

&&

.MAF WATCHES/WARNINGS/ADVISORIES...
TX...None.
NM...None.
&&

SHORT TERM...87
LONG TERM....44
AVIATION...87

Hazardous Weather Outlook
National Weather Service Midland/Odessa TX
200 AM CDT Sun Jul 11 2021

NMZ027>029-033-034-TXZ045>048-050>053-059>063-067>070-075-082-
270>282-120700-
Guadalupe Mountains of Eddy County-Eddy County Plains-
Northern Lea County-Central Lea County-Southern Lea County-Gaines-
Dawson-Borden-Scurry-Andrews-Martin-Howard-Mitchell-Loving-Winkler-
Ector-Midland-Glasscock-Ward-Crane-Upton-Reagan-Pecos-Terrell-
Guadalupe Mountains Above 7000 Feet-Guadalupe and Delaware Mountains-
Van Horn and Highway 54 Corridor-Eastern Culberson County-
Reeves County Plains-Chinati Mountains-Marfa Plateau-Davis Mountains-
Davis Mountains Foothills-Central Brewster County-Chisos Basin-
Presidio Valley-Lower Brewster County-
200 AM CDT Sun Jul 11 2021 /100 AM MDT Sun Jul 11 2021/

This Hazardous Weather Outlook is for portions of southeast New
Mexico, southwest Texas, and western Texas.

.DAY ONE...Today and Tonight

There is a marginal risk of severe storms today and this evening,
mainly along and north of I-10, capable of producing large hail and
damaging winds.  Heavy rain may also result in flash flooding.

Elsewhere, thunderstorms are possible today and tonight. Any storms
that do develop will be accompanied by frequent lightning, small
hail, gusty winds, and brief, heavy rainfall.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

Please relay any information about observed severe weather to the
NWS while following all local, state and CDC guidelines.

This product, along with other watches, warnings, advisories,
and statements issued by the National Weather Service Office in
Midland, can be found on the internet at...
https://weather.gov/midland

44

Special Weather Statement
National Weather Service Midland/Odessa TX
1013 AM MDT Sun Jul 11 2021

NMZ029-111700-
Northern Lea County NM-
1013 AM MDT Sun Jul 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LEA COUNTY UNTIL
1100 AM MDT...

At 1013 AM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Caprock, or 28 miles northwest of Tatum, moving
southeast at 25 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Caprock.

LAT...LON 3342 10318 3304 10376 3340 10377 3340 10372
      3357 10372 3357 10358
TIME...MOT...LOC 1613Z 299DEG 25KT 3351 10369