Area Forecast Discussion
Issued by NWS San Angelo, TX
Issued by NWS San Angelo, TX
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477 FXUS64 KSJT 070506 AFDSJT Area Forecast Discussion National Weather Service San Angelo TX 1206 AM CDT Tue May 7 2024 ...New AVIATION... .SHORT TERM... (This evening through Tuesday) Issued at 341 PM CDT Mon May 6 2024 Our forecast area should be free of thunderstorms late this afternoon and again late Tuesday afternoon, but is something we will have to monitor for some of our far eastern/southeastern counties. A dryline was mixing east toward our western border counties this afternoon, and may get as far east as the western Big Country, western Concho Valley and western Crockett County by 5-6 PM. Cloud cover remains over our Heartland and Northwest Hill Country counties while skies have cleared over western and northern parts of our area. The upper support associated with a potent, negatively tilted upper trough is well north of our area this afternoon, and the trough is lifting northeast into the central/northern High Plains. The airmass ahead of the dryline is strongly unstable with CAPE values of 3000- 4000 J/kg. We are continuing with slight chance PoPs in our far eastern counties (mainly east of a Throckmorton to Mason line) late this afternoon and early evening. While thunderstorm development looks unlikely, a conditional threat exists for localized very large hail, damaging winds and an isolated tornado. Drier low-level air will infiltrate our northern and central counties, and the Northern Edwards Plateau late tonight and Tuesday morning. Clear skies are expected for most of our area. Our southeastern counties will have redevelopment of low clouds late tonight and early Tuesday morning, before breaking up around mid- morning. Some patchy fog may also develop by early Tuesday morning in a more moist boundary layer and light winds south of an Eldorado to San Saba line. Expect overnight lows will range from the mid to upper 50s in the Big Country and northwest Concho Valley, to mid to upper 60s in our southeastern counties. Very warm to hot temperatures are expected on Tuesday, with partly cloudy skies in our southeastern counties and mostly sunny skies over the rest of the area. Highs will range from the mid to upper 80s in some of our northern and eastern counties, to the lower to mid 90s in the Concho Valley and southern parts of our area. One of the models indicates a potential for isolated shower/thunder storm development in the far southeastern part of our area late Tuesday afternoon. With the potential looking rather low, not including any mentionable PoPs at this time. A broad upper low/trough will be over the northern Plains and northern Rockies on Tuesday, with quasi- zonal flow aloft over our area. && .LONG TERM... (Tuesday night through next Monday) Issued at 300 PM CDT Mon May 6 2024 Issued at 157 PM CDT Mon May 6 2024 Above normal temperatures will continue on Wednesday, with mainly dry conditions and afternoon highs ranging from the upper 80s across the Big Country, to the mid and upper 80s elsewhere. An upper level trough will track east across the central and northern Plains on Thursday. An associated cold front is expected to move south across the area late Wednesday night and Thursday. The front will bring gusty north winds and cooler temperatures for the end of the week. Highs on Thursday will range from the 70s north of the front across the Big Country, to the upper 80s to near 90 ahead of the front along the I-10 corridor. There is a low chance for thunderstorms to develop along the front over far southeast counties during the afternoon hours. Any storms that develop could become strong/severe given an unstable airmass and adequate shear. Highs on Friday will be in the mid and upper 70s, with lows Thursday night and Friday night in the 50s. Models continue to show an upper level storm system developing across the Desert Southwest Friday into Saturday, then tracking slowly east into the southern Plains by late in the weekend and early next week. Some model differences continue, with the ECMWF maintaining a slower solution. This system will bring a chance of showers and thunderstorms to the area over the weekend and possibly into early next week. Given some model differences, will keep POPs on the low side for now. Highs over the weekend will be in the upper 70s to around 80 degrees on Saturday, warming into the low to mid 80s by next Monday. && .AVIATION... (06Z TAFS) Issued at 1200 AM CDT Tue May 7 2024 Stratus is currently developing across the northwest Hill Country and expect MVFR ceilings to develop at the southern 3 sites by 07Z. VFR conditions will return to all sites by mid morning. Winds through the next 24 hours should generally remain below 12 knots. && .PRELIMINARY POINT TEMPS/POPS... Abilene 89 67 90 59 / 0 0 0 0 San Angelo 95 68 95 60 / 0 0 0 0 Junction 95 71 98 63 / 0 0 0 0 Brownwood 89 68 91 60 / 0 0 0 0 Sweetwater 89 66 90 58 / 0 0 0 0 Ozona 93 68 93 63 / 0 0 0 0 Brady 90 70 92 62 / 0 0 0 0 && .SJT WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...19 LONG TERM....24 AVIATION...Daniels