251
FXUS64 KHGX 212344
AFDHGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
644 PM CDT SUN JUN 21 2026
..NEW AVIATION
KEY MESSAGES
- HEAT WILL REMAIN A CONCERN THROUGH MIDWEEK, WITH HEAT INDICES
NEARING 107F (41-42C) AND OVERNIGHT LOWS ONLY FALLING INTO THE
UPPER 70S TO LOWER 80S (26-28C).
- A HIGH RISK OF STRONG RIP CURRENTS WILL CONTINUE THROUGH THE
NEXT FEW DAYS.
DISCUSSION
ISSUED AT 120 PM CDT SUN JUN 21 2026
AFTER DAYS OF ACTIVE WEATHER, WE'RE FINALLY BEGINNING TO SEE THE
END OF PRECIP FOR A FEW DAYS. EARLIER SHOWERS AND THUNDERSTORMS
HAVE ALL BUT DISSIPATED, WITH A FEW LINGERING SHOWERS MOVING
EASTWARD AND OUT OF OUR AREA. THE WEAK BOUNDARY AND SURFACE LOW
THAT GENERATED THE CONVECTION SEEM TO HAVE WEAKENED AND DRIFTED
SOUTH AS RIDGING BUILDS IN FROM THE WEST. CLOUDS WILL LINGER FOR A
FEW MORE HOURS, KEEPING TEMPS FROM WARMING TOO MUCH, THE EXCEPTION
BEING OUR FAR NORTHWEST AREAS. BEING THE LONGEST DAY OF THE YEAR,
THOUGH, WE'LL HAVE ENOUGH TIME FOR HIGHS TO WARM INTO THE MID 80S.
UPPER RIDGING WILL DOMINATE THE WEATHER PATTERN THROUGH MUCH OF
THE WORK WORK, WITH MID AND UPPER LEVEL FLOW BECOMING MORE ZONAL.
THIS WILL CUT US OFF FROM THE DEEP LAYER MOISTURE THAT'S BEEN IN
PLACE, WITH DRIER AIR WORKING IT'S WAY IN. WE'LL GO FROM NEARING
THE CLIMATOLOGICAL MAX FOR PWS LAST WEEK TO NEARING THE 25TH
PERCENTILE NEXT WEEK. GIVEN THE LOWER MOISTURE AND SUBSIDENCE,
HAVE KEPT VERY LOW POPS IN THE FORECAST. UNFORTUNATELY, HOT
CONDITIONS WILL ALSO PERSIST UNDER THE RIDGE, WITH HIGHS CLIMBING
INTO THE MID 90S NEXT WEEK. DEWPOINTS WILL LESSEN AND OVERNIGHT
LOWS WILL FALL INTO THE MID 70S, SO A SLIGHT REPRIEVE FROM THE
MORE OPPRESSIVE HEAT. THAT SAID, HEAT INDICES WILL CLIMB INTO THE
TRIPLE DIGITS, BUT SHOULD STAY BELOW HEAT ADVISORY CRITERIA,
EXCEPT FOR MAYBE A FEW ISOLATED SPOTS.
AVIATION
(00Z TAF ISSUANCE)
ISSUED AT 644 PM CDT SUN JUN 21 2026
VFR CONDITIONS WILL REMAIN PREVALENT AT MOST SITES THROUGH THE
EVENING HOURS, THOUGH MVFR CEILINGS MAY IMPACT SGR/LVJ/LBX AT
TIMES. CEILINGS ARE FORECAST TO LOWER TO MVFR ACROSS MOST
TERMINALS BY AROUND 05-07Z AND PERSIST THROUGH EARLY MONDAY
MORNING BEFORE LIFTING BACK TO VFR AFTER 14-16Z. WINDS REMAIN
SOUTHERLY AROUND 10 KNOTS OVERNIGHT AND INCREASE TO 10-15 KNOTS
WITH A FEW GUSTS OVER 20 KNOTS DURING THE DAY MONDAY.
MARINE
ISSUED AT 120 PM CDT SUN JUN 21 2026
MODERATE ONSHORE FLOW WILL PERSIST THROUGH MONDAY MORNING,
FOLLOWED BY LIGHT TO MODERATE ONSHORE FLOW FROM MIDWEEK ONWARD.
SEAS OF 3 TO 6 FEET ARE EXPECTED THROUGH MONDAY.
PRELIMINARY POINT TEMPS/POPS
COLLEGE STATION (CLL) 78 93 78 94 / 0 0 0 0
HOUSTON (IAH) 79 93 79 94 / 0 0 0 0
GALVESTON (GLS) 84 89 83 89 / 0 0 0 0
HGX WATCHES/WARNINGS/ADVISORIES
TX...HIGH RIP CURRENT RISK THROUGH MONDAY EVENING FOR TXZ436>439.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION THROUGH MONDAY AFTERNOON FOR
GMZ330-335-350-355-370-375.
DISCUSSION...JTC
AVIATION...CLL
MARINE...JTC
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