547
FXUS64 KHGX 220531
AFDHGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1131 PM CST SUN DEC 21 2025
..NEW DISCUSSION, MARINE
KEY MESSAGES
- LONG STRETCH OF UNSEASONABLY WARM WEATHER WITH TEMPERATURES
10-20 DEGREES ABOVE NORMAL. THESE TEMPERATURES WILL BE NEAR
DAILY RECORD HIGH VALUES, AND A FEW RECORDS MAY FALL THROUGHOUT
THE WEEK.
- DAILY VISIBILITY REDUCTIONS DUE TO FOG AND SEA FOG, ESPECIALLY
ACROSS THE BAYS AND COASTAL AREAS. THE MAIN THREAT FOR FOG WILL
BE DURING THE NIGHTTIME AND EARLY MORNING HOURS.
DISCUSSION
ISSUED AT 1035 PM CST SUN DEC 21 2025
THE CALENDAR IS READING DECEMBER, BUT THE FORECAST IS GIVING END
OF OCTOBER/EARLY NOVEMBER. HIGH PRESSURE ALOFT AND SOUTHERLY FLOW
AT THE SURFACE BRINGING WARM, MOIST AIR INTO THE REGION WILL
CONTINUE THE UNSEASONABLY WARM WEATHER THROUGH THE REST OF THIS
WEEK. HIGH TEMPERATURES WILL BE IN THE UPPER 70S TO LOW 80S (ABOUT
15 DEGREES ABOVE NORMAL) AND OVERNIGHT LOWS IN THE LOW T0 MID 60S
(ABOUT 20 DEGREES ABOVE NORMAL). WE WILL BE WITHIN A FEW DEGREES
OF RECORD TEMPERATURES THROUGH AT LEAST FRIDAY OR SATURDAY.
GUIDANCE DOES INDICATE A COLD FRONT BRINGING A RETURN OF SEASONAL
WEATHER NEXT WEEKEND, BUT THERE IS UNCERTAINTY ON IF THE FRONT
WILL MAKE IT THROUGH THE REGION OR STALL TO THE NORTH.
THE MOST IMPACTFUL WEATHER THIS WEEK WILL BE THE CHANCE OF DENSE
FOG EACH NIGHT THROUGH AT LEAST MIDWEEK. THE CHANCE OF WIDESPREAD,
DENSE FOG WILL BE HIGHEST ALONG THE COAST DEVELOPING IN THE LATE
EVENING HOURS THAT PERSIST THROUGH THE MID-MORNING. THERE IS A
CHANCE FOR PATCHY FOG TO REMAIN OVER PARTS OF THE COASTAL WATERS
THROUGH THE AFTERNOON HOURS, BUT MORE ON THAT IN THE MARINE
SECTION BELOW.
FOWLER
AVIATION
(00Z TAF ISSUANCE)
ISSUED AT 507 PM CST SUN DEC 21 2025
VFR CONDITIONS AND LIGHT WINDS PERSIST FOR MOST LOCATIONS, BUT
LIFR CONDITIONS ARE ONGOING AT GLS DUE TO SEA FOG. WIDESPREAD
IFR/LIFR CONDITIONS ARE EXPECTED EVENTUALLY OVERNIGHT, BUT THE
TIMING OF WHEN THIS OCCURS ON A PER-TERMINAL BASIS DEPENDS ON
THEIR PROXIMITY TO A WEAK FRONTAL BOUNDARY. AS OF 23Z/SUNDAY, THE
FRONT IS CURRENTLY NEAR CXO AND IS NOT ANTICIPATED TO GO ANY
FURTHER SOUTH THAN POTENTIALLY IAH. AS A RESULT, THE SOUTHERN
TERMINALS WILL SEE DECREASING CEILINGS/VISIBILITES A FEW HOURS
QUICKER THAN THE NORTHERN TERMINALS. WITH WINDS BEING MUCH LIGHTER
TONIGHT, DENSE FOG IS EXPECTED TO POSE MORE OF AN IMPACT TO MOST
TERMINALS ESPECIALLY IN THE 09Z-15Z TIMEFRAME. OUTSIDE OF GLS,
VISIBILITIES WILL IMPROVE BY 16Z WITH MVFR CEILINGS LINGERING TILL
18Z-20Z. SEA FOG IS EXPECTED TO LINGER AROUND GLS THROUGHOUT THE
DAY, SO IFR/LIFR CONDITIONS PREVAIL FOR THE ENTIRE TAF PERIOD.
HIGH RESOLUTION MODEL GUIDANCE ALSO INDICATED TO THE POTENTIAL FOR
ISOLATED SHOWERS MONDAY MORNING AND INTO THE AFTERNOON, BUT THE
PROBABILITIES ARE TOO LOW TO INCLUDE A MENTION OF IT IN ANY OF
THE TAFS AT THE MOMENT.
BATISTE
MARINE
ISSUED AT 1035 PM CST SUN DEC 21 2025
A DENSE FOG ADVISORY REMAINS IN EFFECT THROUGH MONDAY MORNING WITH
AREAS OF DENSE FOG (VISIBILITIES LESS THAN 1NM) EXPECTED IN THE
BAYS AND NEARSHORE WATERS. THE FOG WILL BECOME PATCHIER THROUGH
THE AFTERNOON, BUT POCKETS OF DENSE FOG WILL BE POSSIBLE ALL DAY
LONG IN THE NEARSHORE WATERS/BAYS. IF THESE AREAS REMAIN
WIDESPREAD ENOUGH, THE ADVISORY MAY BE EXTENDED THROUGH THE
AFTERNOON. THIS CYCLE WILL CONTINUE THROUGH AT LEAST MIDWEEK WITH
AREAS OF DENSE FOG REDEVELOPING EACH EVENING THAT PERSIST THROUGH
THE MORNING, THEN PATCHY FOG POSSIBLE DURING THE AFTERNOON HOURS.
BY THURSDAY, OCEAN TEMPERATURES SHOULD WARM UP ENOUGH TO HELP
LIMIT FOG DEVELOPMENT, BUT PATCHY FOG MAY CONTINUE TO BE POSSIBLE.
OTHER THAN THE FOG, EXPECT LIGHT SOUTHERLY WINDS AND LOW SEAS TO
PREVAIL THROUGH THIS WEEK.
FOWLER
PRELIMINARY POINT TEMPS/POPS
COLLEGE STATION (CLL) 58 78 65 80 / 0 0 0 0
HOUSTON (IAH) 66 79 66 80 / 10 10 0 0
GALVESTON (GLS) 65 71 64 71 / 10 10 0 0
HGX WATCHES/WARNINGS/ADVISORIES
TX...DENSE FOG ADVISORY UNTIL 10 AM CST MONDAY FOR TXZ214-236>238-300-
313-335>338-436>439.
GM...DENSE FOG ADVISORY UNTIL 10 AM CST MONDAY FOR GMZ330-335-350-355.
DISCUSSION...FOWLER
AVIATION...BATISTE
MARINE...FOWLER
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