698 FXUS64 KSJT 181901 AFDSJTArea Forecast Discussion National Weather Service San Angelo TX 201 PM CDT Thu Sep 18 2025
...New LONG TERM...
.KEY MESSAGES...
- Warm, but near-normal temperatures continue today.
- Low chances for showers and thunderstorms primarily Sunday through Tuesday.
- After above normal temperatures Friday through Monday, temperatures should be at least a little cooler Tuesday into Wednesday.
&&
.SHORT TERM... (This evening through Friday) Issued at 1230 PM CDT Thu Sep 18 2025
A weak boundary has moved into the Big Country region early this afternoon, with a more distinct frontal boundary farther north. The boundary in the Big Country could result in a few isolated to scattered showers and thunderstorms, mainly north of the Interstate 20 boundary this afternoon and evening. Otherwise, temperatures will drop into the mid and upper 60s tonight, with another warm day Friday, with highs reaching the upper 80s to mid 90s.
&&
.LONG TERM... (Friday night through next Thursday) Issued at 200 PM CDT Thu Sep 18 2025
This weekend into Monday, an upper level high will be centered over Mexico, and our area will have northwest flow aloft. With this setup, a few embedded disturbances could move over our area and bring a possibility of isolated to scattered showers and thunderstorms. At this time, we have low (20-30) PoPs in the northern half of the Big Country Saturday afternoon and Saturday night, and low to medium (20-40) PoPs in northern (Big Country) and east-central (Heartland) Counties Sunday afternoon into early Sunday night. Isolated to scattered showers and storms will be possible in our area Monday with our eastern counties more favored. Expect increased and somewhat breezy south winds over the weekend with an increased pressure gradient and a lee surface trough to our west. Temperatures will be trending hotter this weekend as 850mb thermal ridge expands east into our area. The hottest days should be Sunday and Monday when highs are expected to be in the mid 90s to around 100 degrees in the Big Country and Concho Valley.
Forecast uncertainty increases considerably in the Tuesday to Thursday time frame next week. This is largely with the evolution of the upper level pattern, and the track/placement of an upper low. The operational medium range models are in poor agreement with each other and with their respective ensembles. Overall, an upper trough is progged to drop southeast into the Plains and develop a closed low, which then tracks into the Midwest. It does look like the upper low should be far enough away from our area to result in lower rain chances, and an associated cold front should be weaker as it moves south into our area on Tuesday. A blended model solution has chances for showers and thunderstorms in our area Tuesday, with only a slight chance of showers/storms in our eastern and southeastern counties into Wednesday. Still have temperatures trending cooler Tuesday into Wednesday with highs back in the mid 80s to lower 90s Tuesday, and mid 80s to around 90 Wednesday. Temperatures could be hotter than this however, especially if the front ends up stalling to the north of our area. Expect additional changes and adjustments to the forecast with subsequent model data in the coming days.
&&
.AVIATION... (18Z TAFS) Issued at 1230 PM CDT Thu Sep 18 2025
VFR conditions expected through the next 24 hours at all sites, although a few SHRA or TSRA could develop near the KABI site. However, coverage is not expected to be enough for a mention at the site. South to southeast winds will generally persist at 5 to 10 knots, with a few readings near 15 knots this afternoon.
&&
.PRELIMINARY POINT TEMPS/POPS... Abilene 68 93 71 94 / 10 10 0 10 San Angelo 66 92 67 92 / 0 10 0 10 Junction 65 92 66 92 / 0 10 0 0 Brownwood 68 92 66 93 / 0 10 0 10 Sweetwater 67 92 70 94 / 0 10 0 10 Ozona 65 90 66 90 / 0 10 0 10 Brady 68 90 67 90 / 0 10 0 10
&&
.SJT WATCHES/WARNINGS/ADVISORIES... None. &&
$$
SHORT TERM...20 LONG TERM....19 AVIATION...20
NWS SJT Office Area Forecast Discussion