367
FXUS64 KSJT 252339
AFDSJT

Area Forecast Discussion
National Weather Service San Angelo TX
639 PM CDT Sat May 25 2024

...New AVIATION...

.SHORT TERM...
(This evening through Sunday)
Issued at 122 PM CDT Sat May 25 2024

...A significant severe weather event is possible across the central
and southern Plains states this afternoon and evening...

The latest severe weather/mesoanalysis analysis shows a dryline
from Slaton to Midland to just west of Sanderson, moving slowly
east. Also, meso sector 2 satellite imagery already indicates a
few CI fails over Sterling and Coke counties. To the east of the
dryline, there is extreme instability across much of our area,
SBCAPES of 5000 to 6000 J/kg and rich low level moisture,
dewpoints in the 70s, even upper 70s over the eastern Big Country.
Also, effective shear values are 50 to 60 knots and the shear
vector is perpendicular to the dryline, so that means separated
storms and probably supercells to start with this afternoon.

Looks like coverage of storms will remain isolated and most areas
will remain dry. An isolated storm or two will probably develop by 3
PM due to low level convergence along the dryline or a local breach
in the cap. The potential for this will along and east of a
Sweetwater to San Angelo line, with maybe better coverage in the SPC
Enhanced Risk Area. Any storms that develop will rapidly become
severe due to the extreme instability and strong vertical wind
shear with the main hazards being giant size hail(baseball size),
damaging winds and tornadoes due to low level shear improving
during the late afternoon and early evening. Keep up with the
latest weather information and have multiple ways of getting
warnings and watches! Most Hi-Res models indicate storms moving
east of the area by 10 PM. However, a few models have isolated
storm or two until 1 AM. Going with low chance Pops and severe
wording across the Concho Valley, Big Country and Heartland early
this evening. Going with a dry forecast after 10 PM through the
rest of the short term. Expect hot and dry weather Sunday with
highs in the upper 90s to around 103.

&&

.LONG TERM...
(Sunday night through next Saturday)
Issued at 116 PM CDT Sat May 25 2024

....Unsettled Pattern to Return Next Week...

Hot weather will continue for Memorial Day as an upper- level
ridge persists over northern Mexico. Numerical guidance suggests
yet another day of triple-digit heat with low overall rain
chances.

Starting Tuesday, the pattern looks to become unsettled again as an
upper-level trough becomes established over the eastern US and puts
the southern Plains into northwest flow.  Models show multiple
shortwave impulses aloft riding over the north edge of the weakening
ridge through Friday.  Warm temperatures in the low to mid 90s will
be expected each afternoon with plenty of Gulf moisture in place due
to southeast surface flow.  A cold front should also dip into west
central Texas late Monday night into Tuesday and stall through
Wednesday. Thunderstorms should develop along both the front and the
dryline late Tuesday with lingering convection possible Wednesday.
The front should lift back northward on Thursday and provide even
more chances for showers and thunderstorms through Friday.
Conditions through the entire week are likely to be warm and muggy.
However, local conditions may be impacted at times by cloud cover
and cold pools left from earlier convection.

&&

.AVIATION...
(00Z TAFS)
Issued at 617 PM CDT Sat May 25 2024

VFR conditions are expected through the next 24 hours with a brief
wind of MVFR ceilings possible across KJCT during the early
morning hours on Sunday. Breezy southerly winds will last through
tonight before starting to shift to the west to northwest by
Sunday morning and becoming breezy again by late morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene     71  97  66  97 /  20   0   0   0
San Angelo  72  99  63 102 /  10   0   0   0
Junction    75 104  66 106 /  10   0   0  10
Brownwood   71  96  64  95 /  10   0   0   0
Sweetwater  71  97  66  97 /  10   0   0   0
Ozona       72  98  65 102 /  10   0   0   0
Brady       72  96  65  97 /  10   0   0   0

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...21
LONG TERM....SK
AVIATION...TP