215
FXUS64 KHUN 081005
AFDHUN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
505 AM CDT THU OCT 8 2026
..NEW NEAR TERM
KEY MESSAGES
UPDATED AT 1237 AM CDT THU OCT 8 2026
- HURRICANE STORM ISAIAS IS FORECAST TO MAKE LANDFALL FRIDAY
NIGHT NEAR THE AL/FL COASTLINE. ISAIAS WILL MOVE RAPIDLY
NORTHWARD SATURDAY AND SATURDAY NIGHT, BRINGING A MEDIUM CHANCE
OF IMPACTFUL GUSTY WINDS AND A LOW RISK OF FLOODING TO THE
TENNESSEE VALLEY.
NEAR TERM
(TODAY AND TONIGHT)
ISSUED AT 504 AM CDT THU OCT 8 2026
OTHER THAN JUST A COUPLE OF PATCHES OF FOG ALONG LAKE
GUNTERSVILLE, A CLEAR SKY WILL START THE DAY WITH TEMPERATURES IN
THE 50S. STRONG SUNSHINE WILL BRING YET ANOTHER WARM AUTUMN DAY
WITH LOW HUMIDITY VALUES. HIGHS WILL REACH THE MIDDLE TO UPPER 80S
FOR THE VAST MAJORITY OF THE AREA, PERHAPS TOUCHING AROUND 90 IN
THE FAR NORTHWEST AL. EXPECT A NORTHEAST WIND OF 5-10 MPH. LOWS
TONIGHT WILL BE INT HE MIDDLE 50S TO AROUND 60.
SHORT TERM
(FRIDAY THROUGH SUNDAY)
ISSUED AT 922 PM CDT WED OCT 7 2026
A BIG TRANSITION WILL BEGIN TO TAKE PLACE FRIDAY AS THE SURFACE
HIGH SHIFTS EAST OF THE REGION AND A SHORTWAVE TROUGH DEVELOPS
OVER TEXAS AND BEGINS TO PIVOT NNE/NE TOWARD THE LOWER MISSISSIPPI
VALLEY. MEANWHILE, A STRONGER SUBTROPICAL RIDGE OFF OF FLORIDA
WILL CONTINUE TO AMPLIFY, BUILDING INTO THE EASTERN GULF BY FRIDAY
AFTERNOON/EVENING. THE POSITION AND MAGNITUDE OF THESE FEATURES
WILL DIRECTLY IMPACT THE TRACK OF ISAIAS AS IT CURVES NORTH TOWARD
THE MS/AL/FL COASTLINE LATE FRIDAY EVENING INTO FRIDAY NIGHT.
THOUGH NO IMPACTS WILL BE FELT ACROSS THE TENNESSEE VALLEY ON
FRIDAY (SAVE FOR A GRADUAL INCREASE IN CLOUD COVER), THIS WILL
QUICKLY CHANGE OVER THE FOLLOWING 24 HOURS.
ISAIAS IS FORECAST TO STRENGTHEN INTO A HURRICANE AND MAKE
LANDFALL NEAR THE AL/FL BORDER FRIDAY NIGHT. THEREAFTER, IT SHOULD
QUICKLY ACCELERATE NORTHWARD DUE TO ITS INTERACTION WITH THE
AFOREMENTIONED SHORTWAVE TROUGH. STRONG WESTERLY WIND SHEAR SHOULD
QUICKLY ERODE ITS TROPICAL CHARACTERISTICS AS IT MOVES NORTHWARD
INTO CENTRAL ALABAMA BY LATE MORNING/MIDDAY HOURS. HOWEVER, THE
STRONG GRADIENT WIND FIELD WILL REMAIN A SIGNIFICANT CONCERN
SATURDAY AFTERNOON/EVENING AND INTO SATURDAY NIGHT AS THE SYSTEM
PUSHES NNE ACROSS THE TENNESSEE VALLEY AND INTO THE
CENTRAL/SOUTHERN APPALACHIANS. GUSTY WINDS WELL WITHIN THE 30-40
MPH RANGE SEEM PLAUSIBLE AND DEPENDING ON WERE THE CENTER OF THE
REMNANT INNER CORE OF ISAIAS GOES, SOME LOCALIZED GUSTS UP TO 50
MPH WOULD BE ON THE TABLE. A WIND ADVISORY SEEMS LIKELY DURING
THIS WINDOW. THESE WINDS, ESPECIALLY WITH WET SOILS, WOULD LIKELY
LEAD TO DOWNED TREES AND POWER OUTAGES ACROSS THE REGION DURING
THE AFTERNOON AND EVENING TIMEFRAME.
WITH ISAIAS MAKING LANDFALL ON THE EASTERN SIDE OF GUIDANCE, THIS
WOULD PLACE THE TENNESSEE VALLEY WITHIN A DEVELOPING DRY SLOT AS
THE SYSTEM GOES EXTRATROPICAL, LIMITING THE RAINFALL THREAT
SOMEWHAT. ADDITIONALLY, AT LEAST FOR NOW, IT APPEARS THAT ANY
TORNADO THREAT WOULD BE CONFINED WELL TO OUR SOUTH AND EAST.
THINK THAT 1.5" TO 3" OF STORM TOTAL RAINFALL WILL BE COMMON, BUT
THE QUICKER PACE THAT THE SYSTEM WILL HAVE AS WELL AS ITS TRACK
WILL RESULT IN A LOWER, MORE LOCALIZED FLOOD THREAT. STILL, RISES
ON RIVERS, CREEKS, AND STREAMS WILL LIKELY OCCUR EVEN WITH THESE
MORE MODEST RAINFALL TOTALS AND WE WILL HAVE TO WATCH RADAR
CLOSELY.
IN SUMMARY, RESIDENTS OF THE TENNESSEE VALLEY SHOULD BE AWARE
AND PREPARED FOR A POTENTIALLY WINDY/RAINY SATURDAY INTO SATURDAY
NIGHT AND STAY TUNED AND UP TO DATE ON THE LATEST FORECAST
INFORMATION -- ESPECIALLY IF THEY HAVE TRAVEL PLANS THIS WEEKEND!
BE PREPARED FOR POWER OUTAGES AND MAKE SURE YOU HAVE YOUR EMERGENCY
KITS/SUPPLIES READY.
LONG TERM
(SUNDAY NIGHT THROUGH WEDNESDAY)
ISSUED AT 922 PM CDT WED OCT 7 2026
IN WAKE OF THE SYSTEM, WINDS WILL SUBSIDE SUNDAY INTO SUNDAY
NIGHT, WITH HIGH PRESSURE BUILDING IN DURING THE EARLY TO MIDDLE
PART OF NEXT WEEK. THIS WILL AGAIN RESULT IN BEAUTIFUL AUTUMN
WEATHER ACROSS THE REGION FOR MID OCTOBER. WITH AMPLE SUNSHINE AND
DRY CONDITIONS HIGHS WILL RETURN TO THE 80S AND OVERNIGHT LOWS
DROP INTO THE 50S.
AVIATION
(12Z TAFS)
ISSUED AT 442 AM CDT THU OCT 8 2026
VFR FLIGHT WEATHER CONDITIONS ARE FORECAST.
HUN WATCHES/WARNINGS/ADVISORIES
AL...NONE.
TN...NONE.
NEAR TERM...17
SHORT TERM....AMP
LONG TERM....AMP
AVIATION...17
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