931
FXUS63 KAPX 071029
AFDAPX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GAYLORD MI
629 AM EDT MON SEP 7 2026
KEY MESSAGES
- TRENDING QUITE MUGGY TUESDAY AND TUESDAY NIGHT WITH INCREASING
SHOWER AND EMBEDDED THUNDER CHANCES.
- BREEZY TUESDAY, AND EVEN GUSTIER ON WEDNESDAY, WITH CONTINUED
BREEZY CONDITIONS LINGERING INTO THURSDAY.
DISCUSSION
ISSUED AT 222 AM EDT MON SEP 7 2026
PATTERN / FORECAST SYNOPSIS:
RIDGING IN THE PROCESS OF FOLDING OVERHEAD AS A SHORTWAVE CRASHES
ASHORE IN THE PACIFIC NW, COMPLETE WITH IMPRESSIVELY DEEP MOISTURE
PLUME THAT HAS ACTUALLY PRODUCED APPRECIABLE RAINFALL AMOUNTS AS FAR
SOUTH AS SOUTHERN CALIFORNIA. CLOSER TO HOME, SURFACE HIGH PRESSURE
CONTINUES TO HOLD DOWN THE FORT, LEADING TO ANOTHER QUALITY DAY
ACROSS THE REGION... AND EXQUISITE CONDITIONS FOR THOSE LOOKING TO
MAKE THE TREK ON FOOT ACROSS MIGHTY MAC THIS MORNING. MOISTURE
ADVECTION WILL BE ON THE INCREASE HEADING THROUGH THE DAY AS THAT
PACIFIC BORNE SYSTEM FORCES ITS WAY INTO THE REGION. AS SUCH, MAY
SEE A TOUCH MORE IN THE WAY OF CLOUD DEVELOPMENT ACROSS THE REGION
THIS AFTERNOON, BUT NOWHERE NEAR ENOUGH TO DRUM UP ANY RAIN. HIGHS
TODAY TOP OUT IN THE MID 70S TO LOW 80S AGAIN... BUT WITH THE
INCREASED MOISTURE ADVECTION, OVERNIGHT LOWS WILL RISE A TOUCH IN
COMPARISON TO THE LAST COUPLE NIGHTS, LIKELY SETTLING IN THE 50S TO
LOWER 60S NEAR THE LAKES.
AS WE VENTURE INTO TUESDAY, THE WAVE WILL HAVE ALREADY EJECTED INTO
THE DAKOTAS AND CANADIAN PRAIRIES, WITH ROBUST SURFACE CYCLOGENESIS
RESPONSE ANTICIPATED. DEEPER MOISTURE PLUME TO BEGIN NOSING INTO OUR
NECK OF THE WOODS AS THE SURFACE LOW COMMENCES OCCLUSION THROUGH THE
DAY. ASSOCIATED SURFACE COLD FRONTAL BOUNDARY TO PROVIDE FORCING TO
OUR NORTH AND WEST. SHOULD BE NOTED THAT MOST AREAS LIKELY STAY DRY
THROUGH TUESDAY EVENING, WITH THE EXCEPTION LIKELY BEING EASTERN
UPPER AND FAR NW LOWER INTO THE STRAITS. BETTER MOISTURE
CONCENTRATION COMMENCES THROUGH THE EVENING INTO THE OVERNIGHT,
WHICH WILL BE WHEN POTENTIAL FOR RAIN REACHES ITS ZENITH. HAVE SOME
DOUBTS ABOUT CONVECTIVE POTENTIAL OWING TO A LACK OF INSTABILITY...
BUT NONETHELESS, IF WE CAN ATTAIN A CONVECTIVE ELEMENT TO THINGS
TUESDAY NIGHT, COULD SEE SOME LOCALIZED HEAVY RAIN OUTBURSTS AS FLOW
WILL SLOWLY BECOME PARALLEL TO THE FRONT, THUS SLOWING ITS ADVANCE
AND OPENING A DOOR FOR SOME TRAINING CONVECTION WITHIN A +3.0 SIGMA
ANOMALY PWAT ENVIRONMENT. ANTICIPATION IS THAT THE FRONT CLEARS
WEDNESDAY, WHICH WOULD LEAVE US IN THE DRY SLOT OF THE CYCLONE... SO
IDEALLY WE SHOULD SEE A DRYING TREND, BUT MAY NEED TO WATCH FOR DRY
SLOT CONVECTION LATER IN THE AFTERNOON IF UPPER FORCING PERMITS.
THE BIGGEST STORY TO COME FROM THIS SYSTEM VERY WELL COULD BE ITS
WIND FIELD, AS A PINCHED PRESSURE GRADIENT BETWEEN THE BROAD SURFACE
LOW OVER ONTARIO AND THE SURFACE HIGH PRESSURE OVER NEW ENGLAND
SUPPORT AN ACCELERATING WIND FIELD... AS MENTIONED BY PREVIOUS
FORECASTER, WIND FIELDS JUST OFF THE DECK GENERALLY HOLD 20 TO 30KTS
(LOCALLY UP TO 35KTS). WARM ADVECTION PROCESSES TUESDAY MAY STUNT
MIXING POTENTIAL, BUT WITHIN THE DRY SLOT ON WEDNESDAY, AMPLE MIXING
SHOULD SUPPORT A GUSTY W TO WSW WIND, PERHAPS PUSHING 40MPH ALONG
THE IMMEDIATE LAKESHORES... GENERALLY 25 TO 35MPH ELSEWHERE.
THE SYSTEM DEPARTS BY THURSDAY, FORCING IN A COOLER AIRMASS TO THE
REGION... BUT THE OUTER EDGE OF THE WINDFIELD WILL REMAIN OVERHEAD,
THUS BRINGING ABOUT A MUCH MORE AUTUMNAL FEEL AS HIGHS GENERALLY
HOLD IN THE 60S AND STRUGGLE TO BREAK 70 SOUTH AMID BREEZY NW WINDS.
BACKSIDE MOISTURE WILL DEPART FOR THURSDAY, SO ANTICIPATION IS SOME
POOFY DIURNAL CUMULUS CLOUDS AND NOT MUCH ELSE. HEADING INTO THE
WEEKEND, TEMPERATURES QUICKLY REBOUND TO THE MID 70S TO LOW 80S
FRIDAY AND SATURDAY AMID A BRIEF ZONAL FLOW REGIME. QUICK SHORTWAVE
PASSAGES MAY SUPPORT UNSETTLED WEATHER THROUGH THE WEEKEND BEFORE A
STRONG COLD FRONT IS FORCED THROUGH THE REGION BY THE CONCLUSION OF
THE WEEKEND... BRINGING POTENTIAL FOR A SHARPLY COOLER AIRMASS TO
INTRUDE FOR THE START OF NEXT WEEK. CURRENT LONG TERM GUIDANCE SHOWS
HIGHS IN THE MID 60S TO NEAR 70. YES IT MAY FEEL A BIT CHILLY, BUT
SHOULD BE NOTED THAT BY MID SEPTEMBER AVERAGE HIGHS DO START TO DROP
BELOW 70 IN SPOTS... SO AT THIS JUNCTURE, THE UPCOMING COOLDOWN
LOOKS TO BE SEASONABLE AND NOT SO MUCH ANOMALOUS.
AVIATION /12Z TAFS THROUGH 12Z TUESDAY/
ISSUED AT 626 AM EDT MON SEP 7 2026
VFR CONDITIONS WILL CONTINUE. MOSTLY TO PARTLY SUNNY SKIES TODAY
GIVES WAY TO INCREASING MID AND HIGH LEVEL CLOUDS TONIGHT. LIGHT
WINDS TODAY INTO TONIGHT, WITH LOCAL LAKE BREEZE DEVELOPMENT
EXPECTED THIS AFTERNOON.
APX WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...NONE.
DISCUSSION...HAD
AVIATION...MSB
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