782
FXUS64 KSJT 171856
AFDSJT

Area Forecast Discussion
National Weather Service San Angelo TX
156 PM CDT Wed Jul 17 2024

...New LONG TERM...

.SHORT TERM...
(Today and tonight)
Issued at 355 AM CDT Wed Jul 17 2024

Early this morning, a complex of thunderstorms was over northern
Oklahoma and southern Kansas. this complex has sent an outflow
boundary south to near the Red River. This outflow
boundary/composite cold front will continue south into our area
today and will be the main focus for isolated to widely scattered
thunderstorms mainly along and south of I-20 this afternoon and
evening. The threat for severe weather is very low, but the storms
will produce dangerous lightning, gusty winds and locally heavy
rainfall. Going with low chance Pops across the northern 2/3 of
the area. For tonight, especially after midnight, another weak
upper level disturbance may bring isolated to widely scattered
storms to the northern half of the area. Another hot day with
highs in the mid 90s to around 102.

&&

.LONG TERM...
(Thursday night through next Wednesday)
Issued at 155 PM CDT Wed Jul 17 2024

The upper level ridge currently over the Four Corners region will
continue to expand across the Western CONUS during the day on
Friday. This will create a weak upper level troughing regime over
the Midwest/Central Plains. With the frontal boundary south of our
area on Friday (meaning little to no low level convergence),
conditions should remain mostly dry. Temperatures will still be able
to climb into low to mid 90s (upper 90s possible in the Concho
Valley) which may erode any capping and allow for some diurnal
activity during the afternoon and early evening hours. These storms
would be weak overall as instability will be very limited across the
area due to the relatively dry low/mid-levels.

By Saturday, the aforementioned upper level troughing will begin to
expand south/southwestward into the Southern Plains. A frontal
boundary to our north is expected to provide a focus for convection
as it continues to move south towards our area Saturday evening into
early Sunday. Rain chances increase significantly by Sunday as we
see the return of more deep level moisture with model soundings
showing PWat values climbing over 1.5 inches across the area. With
the weak upper trough holding across in the area and the front
expected to stall out in our general vicinity, chances for showers
and storms remain decently high through Wednesday (peaking around 50-
70% areawide). Due to the nebulous forcing across the area, how
widespread all of this activity remains difficult to say. The
moisture will certainly be available but changes in the troughing
pattern and/or placement in the frontal/outflow boundary may create
significant differences in who sees high totals and who "misses
out". Have had to broadbrush QPF amounts but confidence is low that
all areas will see totals that high (generally 1-2 inches) with the
higher totals expected across our southern/southeastern counties. At
the very least, cooler temperatures will prevail with highs during
this timeframe below average in the mid 80s to lower 90s. This
wetter and cooler pattern looks to hold through the end of the work
week with our more typical summer pattern potentially making its
comeback by next weekend.

&&

.AVIATION...
(18Z TAFS)
Issued at 1205 PM CDT Wed Jul 17 2024

Satellite and radar images as well as surface observations
indicate the outflow boundary from the convection that moved
across portions of the Texas panhandle and Oklahoma last night
into early this morning has reached the northern portions of the
CWA early this afternoon. Mostly mid to high level clouds were
associated with this boundary. This outflow boundary will be a
focus for showers and thunderstorms to develop across portions of
the CWA later today into tonight. Expect VFR conditions to prevail
the rest of the afternoon into the evening with brief MVFR
conditions with thunderstorms in the vicinity of thunderstorms.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene     72  93  68  94 /  20  20  10  10
San Angelo  73  96  70  98 /  40  40  10  20
Junction    73  94  71  96 /  20  50  10  30
Brownwood   72  93  68  93 /  30  20  10  10
Sweetwater  73  94  69  96 /  30  20  10  10
Ozona       72  93  70  96 /  20  40  10  20
Brady       73  93  69  93 /  30  40  10  20

&&

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

$$

SHORT TERM...21
LONG TERM....50
AVIATION...61