FXUS64 KSJT 210445 AFDSJT Area Forecast Discussion National Weather Service San Angelo TX 1145 PM CDT Sat Jun 20 2026 ...New LONG TERM... .KEY MESSAGES... - Hot and humid conditions return for Sunday and Monday, with heat index values again climbing to near or above the 105 mark in some areas. A Heat Advisory is in effect for portions of the Concho Valley and the Big Country on Sunday. - Low chances (20 to 30%) for scattered storms Monday night across the Big Country. Locally gusty winds and heavy rainfall will be the main concerns. - Mainly dry conditions Tuesday through the end of the week, with above normal temperatures through the period. && .SHORT TERM... (This evening through Sunday) Issued at 130 PM CDT Sat Jun 20 2026 The hot and fairly humid conditions West Central Texas experienced today will progress into Sunday with temperatures increasing into the lower 90s and up to 105, and dewpoint temperatures in the mid 60s to lower 70s. These higher dewpoint temperatures with the hot high temperatures Sunday afternoon will create dangerously high heat index values between 105 and 108 degrees across portions of the Big Country and Concho Valley. Therefor, a Heat Advisory has been issued for 1PM through 10PM Sunday for Much of the Big Country and western and central portions of the Concho Valley tomorrow. There is a slight chance for isolated showers and sub- severe thunderstorms this afternoon across our southeastern counties, given the ample moisture and diurnal heating. Overnight lows tonight will struggle to fall below the mid to low 70s across much of West Central Texas. && .LONG TERM... (Monday night through next Sunday) Issued at 1138 PM CDT Sat Jun 20 2026 Hot and humid conditions are in store for Monday, with afternoon highs ranging from the mid 90s south, to the upper 90s to near 104 across portions of the Big Country and Concho Valley. Heat index values are forecast to exceed 105 degrees (105 to 107 degrees) where the hottest temperatures are expected, and a Heat Advisory will likely be needed for portions of the Concho Valley and Big Country Monday afternoon. A stalled frontal boundary will be draped across north Texas/southern Oklahoma Monday into Tuesday. There is a low chance (20 to 30%) for showers and a few thunderstorms across the northern Big Country mainly Monday evening. Otherwise, the rest of the week will be hot but not quite as humid, with above normal temperatures, as upper level high pressure expands across West Texas. Given slightly drier conditions, heat index values should remain below advisory levels through Friday. Temperatures warm a bit more by next weekend, which may result in the need for additional Heat Advisories for portions of the area. && .AVIATION... (00Z TAFS) Issued at 638 PM CDT Sat Jun 20 2026 Isolated showers were occurring this evening in our far southeastern counties, and have initialized the KJCT TAF with VCSH. VFR conditions and mostly clear skies are expected through Midnight at our TAF sites. Late tonight and early Sunday morning, low cloud development is expected from south to north over most of the southern half of our area. Carrying MVFR ceilings at our southern terminals, and a scattered layer at KSJT which should be near the northern edge of the cloud field. Expect a breakup of the low clouds by 15Z-16Z. Southeast winds this evening will veer to the south overnight. On Sunday, south or south-southwest winds will increase and become gusty by mid-to-late morning, and continue through the afternoon. Expect gusts of 19-22 knots. && .PRELIMINARY POINT TEMPS/POPS... Abilene 75 96 77 99 / 0 0 0 10 San Angelo 73 96 76 100 / 0 0 0 0 Junction 72 92 75 95 / 0 0 0 0 Brownwood 73 93 77 96 /0 0 0 0 Sweetwater 74 100 77 102 / 0 0 0 0 Ozona 72 92 74 97 / 0 0 0 0 Brady 72 92 75 95 / 0 0 0 0 && .SJT WATCHES/WARNINGS/ADVISORIES... Heat Advisory from 1 PM to 10 PM CDT Sunday for Coke-Fisher- Haskell-Irion-Jones-Nolan-Shackelford-Sterling-Taylor- Throckmorton-Tom Green. && $$ SHORT TERM...TP LONG TERM....24 AVIATION...19