556
FXUS63 KAPX 101659
AFDAPX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GAYLORD MI
1259 PM EDT SAT OCT 10 2026
KEY MESSAGES
-SEASONABLY WARM TEMPERATURES CONTINUE THROUGH MONDAY.
-TEMPERATURES FALL BACK TO NORMAL THIS TUESDAY WITH PERIODIC SHOWER
CHANCES BY MIDWEEK NEXT WEEK.
DISCUSSION
ISSUED AT 255 AM EDT SAT OCT 10 2026
PATTERN SYNOPSIS:
MIDLEVEL HEIGHTS BEGIN TO RISE ACROSS THE CENTRAL U.S, SUPPORTING
SUBSIDENCE ALOFT AND OVERALL DRY AND QUIET WEATHER TO BUILD THIS
WEEKEND. SURFACE ANALYSIS DEPICTS 1032MB HIGH PRESSURE CENTERED OVER
NORTHERN ONTARIO WHILE 996MB LOW PRESSURE OVER MANITOBA PUSHES A
WEAK WARM FRONT ACROSS NORTHERN MICHIGAN. WARM AIR ADVECTION
COMBINED WITH A MODERATE PRESSURE GRADIENT ACROSS THE GREAT LAKES
REGION WILL SUPPORT NEAR RECORD-BREAKING TEMPERATURES TODAY ALONG
WITH HIGHS IN THE 70S THROUGH MONDAY WITH BREEZY SOUTHERN FLOW.
THE SECOND HALF OF THE FORECAST PERIOD TAKES A SHARP TURN BACK TO
NORMAL OCTOBER TEMPERATURES AS THE AFOREMENTIONED RIGGING PATTERN
BREAKS DOWN AND QUICKLY LOWERS HEIGHTS ACROSS THE NORTHERN U.S. H8
TEMPERATURES, CURRENTLY AROUND 20 DEGREES, QUICKLY FALL BACK INTO
THE SINGLE DIGITS, SUPPORTING HIGHS IN THE 50S FOR MOST LOCATIONS.
AT THE SAME TIME, A SMALL WAVE DEVELOPS LEE OF THE CANADIAN ROCKIES
AND PROGRESSES TO THE GREAT LAKES REGION MONDAY NIGHT. LIGHT SHOWERS
WILL BE OBSERVED ACROSS THE CWA, BUT ONLY A GENERAL TENTH OR LESS OF
QPF IS EXPECTED. ANOTHER WAVE FOLLOWS SHORTLY BEHIND AND CONTINUES
RAIN CHANCES AROUND THE THURSDAY/FRIDAY TIMEFRAME.
FORECAST DETAILS:
TODAY, SUNDAY, AND MONDAY: CONDITIONS REMAIN DRY THROUGH THE
ENTIRETY OF THE WEEKEND AS ANY RAIN POTENTIAL FROM THE NORTHERN
EXTENT OF ISAIA'S DISHEVELED MOISTURE PLUME REMAINS CONFINED TO
SOUTHERN MICHIGAN AND THE OHIO VALLEY. AFOREMENTIONED WARM AIR
ADVECTION WILL COMMENCE THIS MORNING AS PRESSURE GRADIENT FORCE
WINDS CREATE BREEZY SOUTHERN FLOW GUSTING WELL INTO THE 20S.
TEMPERATURES APPEAR TO REMAIN SLIGHTLY LOWER COMPARED TO YESTERDAY'S
GUIDANCE AS A MORE SOUTHERLY ORIENTED FETCH LEADS TO LESS DOWNSLOPE
HEATING. REGARDLESS, NEAR RECORD BREAKING HEAT BUILDS THIS AFTERNOON
WITH HIGHS IN THE MID/UPPER 70S. THE APEX OF AFOREMENTIONED RIDGING
BREAKS DOWN THIS SUNDAY AND SLIGHTLY LOWERS TEMPERATURES AROUND 70
THIS SUNDAY AND MONDAY.
TUESDAY THROUGH FRIDAY OUTLOOK: A MIDLEVEL WEAK WAVE ORIGINATING
FROM NORTHERN ALBERTA DEVELOPS SURFACE LOW PRESSURE WITH AN APPARENT
STATIONARY BOUNDARY AND DIGS ACROSS THE GREAT LAKES REGION MONDAY
NIGHT THROUGH TUESDAY MORNING. MOISTURE TIED TO THIS SYSTEM BECOMES
CUT OFF FROM ITS PACIFIC SOURCE AND APPEARS TO BE DECAYING AS IT
TRANSITS ACROSS THE GREAT LAKES REGION, RESULTING IN PRETTY MARGINAL
QPF AMOUNTS. HIGHEST TOTAL RAINFALL AMOUNTS REMAIN AROUND A TENTH
INCH FOR MOST PARTS OF THE CWA. LATEST ENSEMBLES APPEAR TO HAVE MUCH
LESS RAINFALL FOR BEYOND THE MIDWEEK AS LONGWAVE TROUGHING WITH
CLOSED LOW PRESSURE CURRENTLY OVER THE PACIFIC NORTHWEST SETTLES
OVER THE SOUTHWEST U.S. NEXT WEEK AND BREAKS DOWN BEFORE REACHING
THE NORTHWOODS. SOME MOISTURE AND SUBSEQUENT RAINFALL CAN STILL BE
EXPECTED AT THIS TIME, BUT WITH MUCH LOWER AMOUNTS COMPARED TO
YESTERDAY'S GUIDANCE.
AVIATION /18Z TAFS THROUGH 18Z SUNDAY/
ISSUED AT 1259 PM EDT SAT OCT 10 2026
VFR. GUSTY SSE TO S WINDS THROUGH THE REST OF THE AFTERNOON,
PERHAPS TOUCHING 30KTS AT TIMES, ESPECIALLY CIU. WINDS TAPER
SOME IN THE EVENING, BUT WITH CONTINUED STRONG FLOW ALOFT, WILL
SEE ABOUT 40-45KTS OF LLWS AT 2,000FT... ESPECIALLY LATER
OVERNIGHT WHEN SURFACE WINDS TREND EVEN LOWER. LLWS TO TAPER
AFTER 12Z SUNDAY... PERSISTENT SOUTHERLY BREEZE TO PREVAIL,
OCCASIONALLY APPROACHING 20KTS THROUGH EARLY AFTERNOON.
APX WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT SUNDAY FOR LHZ345>349.
SMALL CRAFT ADVISORY UNTIL 6 AM EDT SUNDAY FOR LMZ323-341-342-
344>346.
SMALL CRAFT ADVISORY UNTIL 6 AM EDT SUNDAY FOR LSZ321-322.
DISCUSSION...SJC
AVIATION...HAD
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