488
FXUS64 KHUN 091041
AFDHUN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
541 AM CDT FRI OCT 9 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1107 AM CDT THU OCT 8 2026
- HURRICANE ISAIAS WILL MAKE LANDFALL ON THE GULF COAST LATE
FRIDAY NIGHT AND BRING HIGH CHANCES FOR IMPACTFUL GUSTY WINDS
UP TO 50 MPH, A MEDIUM CHANCE FOR FLASH FLOODING, AND A LOW
CHANCE FOR TORNADOES SATURDAY MORNING THROUGH SATURDAY EVENING.
- A HIGH WIND WATCH IS IN EFFECT FROM 7 AM SATURDAY TO 7 AM
SUNDAY.
- A FLOOD WATCH IS IN EFFECT FROM 1 AM SATURDAY TO 7 AM SUNDAY.
NEAR TERM
(TODAY)
ISSUED AT 119 AM CDT FRI OCT 9 2026
TODAY WILL FEATURE OUR PATTERN SWITCH FROM HIGH PRESSURE
DOMINATING TO THE INCOMING TROPICAL SYSTEM. ALREADY, HIGH CIRRUS
ASSOCIATED WITH HURRICANE ISAIAS CAN BE SEEN ON SATELLITE
FILTERING NORTH THROUGH THE TN VALLEY. THROUGH THE DAY, HURRICANE
ISAIAS WILL CONTINUE TO PUSH NORTH TOWARDS THE GULF COAST,
CONSTRICTING THE LOCAL PRESSURE GRADIENT AHEAD OF IT. AS SUCH,
GRADIENT WINDS WILL INCREASE WITH GUSTS OF 20-25 MPH LIKELY BY
THIS AFTERNOON. CLOUDS WILL ALSO INCREASE IN COVERAGE THROUGH THE
DAY WHICH WILL KEEP HIGHS A FEW DEGREES COOLER IN THE LOW TO MID
80S. AFTER SUNSET CONDITIONS WILL DETERIORATE QUICKLY AS ISAIAS
MAKES LANDFALL AND CONTINUES TO PUSH NORTH, READ MORE BELOW
REGARDING LOCAL IMPACTS. FOR NOW, MAKE SURE TO SECURE OUTDOOR
ITEMS AND PREPARE FOR POSSIBLE POWER OUTAGES.
SHORT TERM
(FRIDAY NIGHT THROUGH SUNDAY)
ISSUED AT 1000 PM CDT THU OCT 8 2026
ISAIAS WILL MAKE LANDFALL LATE FRIDAY EVENING INTO FRIDAY NIGHT
ALONG THE AL OR FL COASTLINE AND ACCELERATE NORTHWARD DUE TO ITS
INTERACTION WITH A SHORTWAVE TROUGH PIVOTING INTO THE LOWER
MISSISSIPPI VALLEY. THOUGH THE STRONG WESTERLY WIND SHEAR WILL
ERODE ITS TROPICAL CHARACTERISTICS AS IT MOVES INLAND, IT WILL
SERVE TO EXPAND THE GRADIENT WIND FIELD AND THE PRECIPITATION
FIELD AHEAD OF THE REMNANT CENTER OF ISAIAS. THUS, RAINFALL WILL
LIKELY BE MOVING INTO THE PARTS OF THE AREA LATE FRIDAY EVENING
AND ESPECIALLY AFTER MIDNIGHT, EXPANDING QUICKLY FROM SOUTH TO
NORTH. ADDITIONALLY, SOME GRADIENT WIND GUSTS IN THE 20-30 MPH
RANGE WILL BEGIN TO EXPAND ACROSS THE AREA, ESPECIALLY IN THE
PREDAWN HOURS AS THE SYSTEM PROGRESSES INTO WEST CENTRAL ALABAMA.
SATURDAY WILL BE A VERY WINDY/RAINY DAY ACROSS THE TENNESSEE
VALLEY AS THE REMNANT CENTER OF ISAIAS TRACKS NORTHWARD INTO THE
TENNESSEE VALLEY AND MID SOUTH FROM THE MID/LATE MORNING THROUGH
THE AFTERNOON. THIS IS WHERE THE EXACT LANDFALL POINT OF ISAIAS
WILL BE CRITICAL AS IT WILL BE INITIALLY SWUNG NORTHWESTWARD AS IT
INTERACTS WITH THE TROUGH. EARLIER GUIDANCE THIS MORNING SUGGESTED
A COASTAL ALABAMA LANDFALL, MEANING THE THE REMNANT CENTER MAY
TRACK MORE TO THE NORTHWEST AND INTO PORTIONS OF EAST CENTRAL AND
NORTHEASTERN MISSISSIPPI ON SATURDAY. THIS TRACK WOULD
POTENTIALLY PLACE US WOULD PLACE US IN A MORE FAVORABLE LOCATION
FOR LOCALLY HEAVY RAINFALL AND AT LEAST A LOW TORNADO THREAT (IF
ANY DESTABILIZATION CAN OCCUR) FROM THE MID/LATE MORNING INTO THE
AFTERNOON ON SATURDAY. GUIDANCE LATER THIS AFTERNOON/EVENING,
INDICATED A WESTERN FLORIDA PANHANDLE LANDFALL AND TOOK THE
REMNANT CENTER OF ISAIAS OVER PORTIONS OF WEST CENTRAL AND
NORTHWEST ALABAMA (CLOSEST TO WHERE THE 03Z NHC TRACK CURRENTLY
HAS IT), POTENTIALLY LIMITING THE TORNADO THREAT SLIGHTLY.
REGARDLESS, RESIDENTS OF THE TENNESSEE VALLEY SHOULD BE AWARE OF
THIS CONDITIONAL, LOW THREAT FOR TORNADOES ON SATURDAY AND HAVE
MULTIPLE WAYS TO GET WARNINGS IN CASE THIS THREAT MATERIALIZES.
WHAT WE DO HAVE EXTREMELY HIGH CONFIDENCE IN IS THAT THE STRONG
GRADIENT WIND FIELD WILL REMAIN A SIGNIFICANT CONCERN SATURDAY AND
SATURDAY NIGHT AS THE SYSTEM PUSHES NNE ACROSS THE TENNESSEE
VALLEY AND INTO THE CENTRAL/SOUTHERN APPALACHIANS. GUSTY WINDS
WELL WITHIN THE 30-50 MPH RANGE SEEM PLAUSIBLE AND DEPENDING ON
WERE THE CENTER OF THE REMNANT INNER CORE OF ISAIAS GOES, SOME
LOCALIZED HIGHER GUSTS WOULD BE ON THE TABLE IF STRONGER WINDS
ALOFT CAN MIX DOWN. A HIGH WIND WATCH IS IN EFFECT FROM 7 AM
SATURDAY TO 7 AM SUNDAY TO HIGHLIGHT THIS CONCERN AND WE WILL
CONTINUE TO MONITOR TRENDS FOR ON WHETHER AN ADVISORY OR HIGH WIND
WARNING IS NEEDED FOR THE AREA AS WE APPROACH THE EVENT.
REGARDING THE FLOODING POTENTIAL, HI-RES GUIDANCE CONTINUES TO
SHOW THE POTENTIAL FOR SOME INTENSE RAIN BANDS (NORTH TO SOUTH)
TO FORM AS THE SYSTEM MOVES NORTH ON SATURDAY. GIVEN THE DEEP
MOISTURE ASSOCIATED WITH ANY TROPICAL SYSTEM, WIDESPREAD RAINFALL
AMOUNTS OF 2-4" ARE ALREADY FORECAST, DESPITE THE FAST MOVEMENT OF
THE SYSTEM. SHOULD THE EVENTUAL LANDFALL POINT AND INLAND TRACK
FAVOR THESE TROPICAL RAINBANDS MOVING OVER OUR AREA DURING THE
LATE MORNING/AFTERNOON, LOCALLY HIGHER AMOUNTS OF RAINFALL UP TO
5-7" MAY OCCUR. THESE RAINS WOULD ALMOST CERTAINLY CAUSE SOME
SIGNIFICANT FLASH FLOODING ISSUES AND IT'S SOMETHING WE'LL BE
WATCHING CLOSELY FOR ON SATURDAY. FOR THIS REASON, A FLOOD WATCH
IS IN EFFECT FROM 1 AM SATURDAY TO 7 AM SUNDAY.
IN SUMMARY, RESIDENTS OF THE TENNESSEE VALLEY SHOULD BE AWARE AND
PREPARED FOR AN IMPACTFUL WEATHER DAY SATURDAY INTO SATURDAY
NIGHT, WITH VERY WIND/RAINY CONDITIONS FORECAST. PLEASE 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.
BY SUNDAY THE SYSTEM WILL BE PULLING AWAY FROM THE REGION AND
MOVING WELL NORTH INTO THE CENTRAL APPALACHIANS. BREEZY
CONDITIONS WILL LIKELY PERSIST DURING THE DAY, HOWEVER, WITH
CLOUDS FINALLY CLEARING BY LATE IN THE DAY. FOR THIS REASON,
HIGHS WILL BE NOTABLY COOLER IN THE MID/UPPER 70S.
LONG TERM
(SUNDAY NIGHT THROUGH THURSDAY)
ISSUED AT 1000 PM CDT THU OCT 8 2026
HIGH PRESSURE WILL BUILD IN FOR MUCH OF THE UPCOMING WEEK -- A
STARK CHANGE FROM WHAT WE'LL BE EXPERIENCING THIS WEEKEND. AS A
RESULT, BEAUTIFUL AUTUMN WEATHER WILL AGAIN BE ON TAP ACROSS THE
AREA THROUGH MUCH OF THE UPCOMING WEEK. WITH AMPLE SUNSHINE AND
DRY CONDITIONS HIGHS WILL RETURN TO THE 80S AND OVERNIGHT LOWS
DROP INTO THE 50S.
AVIATION
(12Z TAFS)
ISSUED AT 541 AM CDT FRI OCT 9 2026
VFR CONDITIONS WILL PREVAIL THROUGH THE FIRST HALF OF THE TAF
PERIOD. WINDS WILL PICK UP THIS AFTERNOON WITH GUSTS UP TO 16KTS.
AFTER 00Z, CONDITIONS WILL CONTINUALLY DETERIORATE THROUGH THE
DURATION OF THE TAF PERIOD WITH INCREASES IN RAIN, WIND, AND WIND
SHEAR AND DECREASES IN CEILINGS AND VISIBILITIES. FUTURE TAF
ISSUANCES WILL REFINE EXACT TIMING AND INTENSITY OF IMPACTS.
HUN WATCHES/WARNINGS/ADVISORIES
AL...FLOOD WATCH FROM LATE TONIGHT THROUGH SUNDAY MORNING FOR
ALZ001>010-016.
HIGH WIND WATCH FROM SATURDAY MORNING THROUGH SUNDAY MORNING FOR
ALZ001>010-016.
TN...FLOOD WATCH FROM LATE TONIGHT THROUGH SUNDAY MORNING FOR TNZ076-
096-097.
HIGH WIND WATCH FROM SATURDAY MORNING THROUGH SUNDAY MORNING FOR
TNZ076-096-097.
NEAR TERM...AMP
SHORT TERM....AMP
LONG TERM....AMP
AVIATION...RAD
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