Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
297 FXUS64 KHGX 201203 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 603 AM CST Thu Nov 20 2025 ...New AVIATION... .KEY MESSAGES... - Near record warmth again today for metro and coastal locations. - Some storms in/near the Brazos Valley and Piney Woods tonight. - Another system is expected to enhance shower and thunderstorm activity Monday into Tuesday. && .DISCUSSION... Issued at 1240 AM CST Thu Nov 20 2025 Any patchy fog will burn off by mid morning, followed by another warm and humid day. Record highs for the metro and coastal areas will be threatened (84 @ IAH/HOU, 82 @ GLS, 85 @ PSX). Cannot rule out some isolated streamer showers during the day, but should be insignificant. Shower/tstm activity stretching from West Texas into Oklahoma should be making eastward progress today in association with larger scale lift in advance of the weakening, negatively tilted trof that`ll be pivoting from the Panhandle region into the Plains. This precip should approach the Brazos Valley this evening and eventually into the Piney woods overnight. Overall instability in our area isn`t much to write home about, and considering the loss of heating, should be waning through the night. May still need to keep any eye out for any embedded stronger rogue cells...a bit moreso if they decide to come in earlier than currently anticipated. Locations south of about Columbus-Livingston may have to wait until Friday-Saturday to see subtle increases in scattered shra/tstm chances. This is when the trof`s associated surface front/wind shift will slowly sag southward...eventually stalling out somewhere near the I-10 corridor late Friday and Saturday. The stalled front will washout on Sunday and southerly winds resume areawide with falling pressures to our west. The next western trof will make its way into the Plains early next week and appears to bring better rain chances across the region Monday into early Tuesday. Its front, and possibly secondary push of cooler midweek air, should hopefully bring back readings closer to seasonable norms going into the second part of next week. 47 && .AVIATION... (12Z TAF Issuance) Issued at 548 AM CST Thu Nov 20 2025 Mix of LIFR to VFR conditions will continue early this morning. Areas of patchy to dense fog currently over areas south of I-10, but is expected to burn off by 14-15Z. The low cigs will gradually lift during the morning hours and may scatter out in the afternoon to early evening hours, but are expected to lower again during the night hours. The chance for showers and storms are expected to increase tonight and continue into Friday. Some storms could produce periods of heavy rain and gusty variable winds. Cotto && .MARINE... Issued at 1240 AM CST Thu Nov 20 2025 Light to moderate onshore flow should continue for the next several days with Gulf seas of 2 to 4 feet. Isolated to widely scattered showers are possible today. A weak front will move into Southeast Texas Thursday night...but is expected to stall inland Friday into Saturday. Scattered showers and thunderstorm chances are possible closer to the boundary. Late night and early morning fog inland may also bleed into the northern bays at times. Better chances of that occurring should be Friday night. Otherwise, southerly winds will increase Sunday as the stalled front dissipates. The next weather system will move into the area Monday night into Tuesday afternoon. 47 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 85 68 82 63 / 30 60 60 30 Houston (IAH) 83 69 85 68 / 30 20 50 40 Galveston (GLS) 79 72 80 71 / 40 10 20 30 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...47 AVIATION...Cotto MARINE...47