069
FXUS63 KDTX 011900
AFDDTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
300 PM EDT MON JUN 1 2026
KEY MESSAGES
- DRY WEATHER WITH PLENTIFUL SUNSHINE CONTINUES THROUGH MID WEEK.
- NEAR NORMAL TEMPERATURES EARLY WEEK BECOME WARMER AND MUCH MORE
HUMID INTO NEXT WEEKEND.
- THE NEXT CHANCE OF RAIN DEVELOPS FRIDAY AND CONTINUES THROUGH THE
WEEKEND.
DISCUSSION
NEAR NORMAL TEMPERATURES TODAY TO START METEOROLOGICAL SUMMER AS
AMPLE SOLAR INSOLATION IS PARTIALLY OFFSET BY COOLER NORTHEASTERLY
WINDS OFF LAKE HURON. OMEGA BLOCK PATTERN REMAINS IN PLACE ACROSS THE
CENTRAL/EASTERN CONUS WITH SURFACE HIGH PRESSURE SLOWLY DRIFTING
OVER THE GREAT LAKES THROUGH MIDWEEK. AS SUCH, LARGELY A PERSISTENCE
FORECAST INTO THURSDAY WITH CONTINUING ACTIVE SUBSIDENCE AND DRY
RESIDENT AIRMASS PROMOTING SUNNY OR MOSTLY SUNNY SKIES EACH DAY AND
ONLY A MODEST AFTERNOON BREEZE. THE RIDGE AXIS GRADUALLY CROSSING THE
CENTRAL GREAT LAKES LEADS TO A STEADY COUPLE DEGREE WARMING TREND
EACH DAY WITH UPPER 70S EARLY THIS WEEK INCREASING TO MID 80S BY
THURSDAY.
BLOCKING PATTERN FULLY BREAKS DOWN BY FRIDAY AS BREEZIER
SOUTHWESTERLY RETURN FLOW DEVELOPS. THE RICHER THETA-E AIRMASS
CURRENTLY CONFINED TO THE PLAINS IS EVENTUALLY FOLDED, AT LEAST
PARTIALLY, INTO SOUTHERN LOWER MI WITH THE EASTWARD RELEASE OF THE
ROCKIES CLOSED LOW. WHILE RAIN CHANCES INCREASE DURING THE DAY
FRIDAY WITH THE ARRIVAL OF UPPER 50 DEWPOINTS, BETTER POTENTIAL IS
FAVORED FRIDAY NIGHT-SATURDAY WHEN THE MIDWESTERN BAROCLINIC ZONE
SHIFTS OVER THE REGION. EXACTLY HOW PROGRESSIVE THIS FEATURE IS
STILL UNCLEAR THIS FAR OUT HOWEVER. THERE IS A SUBSET LONG RANGE
MODEL SOLUTIONS BEGINNING TO ADVERTISE THE DEVELOPMENT OF A CLOSED
LOW SOMEWHERE OVER THE MIDWEST/GREAT LAKES STALLING THE BAROCLINIC
ZONE NEAR OR OVER SE MI.
MARINE
NORTHEAST FLOW HAS EMERGED ACROSS THE GREAT LAKES TODAY, WITH
LOCALLY ENHANCED FLOW ALONG THE FETCH OF SAGINAW BAY WHERE GUSTS
WILL PEAK AROUND 25 KNOTS THIS AFTERNOON. A SMALL CRAFT ADVISORY IS
IN EFFECT FOR INNER SAGINAW BAY. HIGH PRESSURE THEN BUILDS SOUTH
FROM ONTARIO, ENSURING A STRETCH OF DRY AND QUIET MARINE WEATHER
THROUGH MOST OF THE WEEK. THE HIGH EVENTUALLY BREAKS DOWN FRIDAY
INTO THIS WEEKEND BRINGING THE NEXT CHANCE FOR SHOWERS AND
THUNDERSTORMS.
PREV DISCUSSION
ISSUED AT 107 PM EDT MON JUN 1 2026
AVIATION...
HIGH PRESSURE STRENGTHENING OVER THE NORTHERN GREAT LAKES IS CAUSING
A SURGE OF DENSE MARINE AIR TO SPREAD SOUTH AND WEST OFF THE GREAT
LAKES. THE RESULT WILL BE AN UPTICK IN ONSHORE WIND THIS AFTERNOON,
ESPECIALLY AT KMBS WHERE NORTHEAST FLOW WILL FUNNEL DOWN SAGINAW BAY
AND PRODUCE GUSTS TO 25 KT. WIND MAGNITUDE WILL BE MARKEDLY LOWER
ELSEWHERE. WIND DIRECTION AT KDTW WILL PRIMARILY HOLD AN EASTERLY
COMPONENT, BUT WITH FLUCTUATIONS OWING TO COMPETING INFLUENCE FROM
LAKE ERIE AND LAKE ST. CLAIR THE REST OF THE DAY. ENOUGH MOISTURE
POOLING AHEAD OF THIS MARINE AIR SHOULD BE SUFFICIENT TO PRODUCE SCT
TO BKN HIGH BASED CUMULUS MAINLY SOUTH OF KFNT FOR A SEVERAL HOURS
BEFORE SUNSET. WIND SPEED THEN RELAXES THIS EVENING AND REMAINS
LIGHT FROM THE NORTHEAST OVERNIGHT WITH SKC EXPECTED. THESE
CONDITIONS PREVAIL INTO EARLY TUESDAY AS HIGH PRESSURE BUILDS IN
FROM THE NORTH.
D21/DTW CONVECTION...NO THUNDERSTORMS THROUGH TUESDAY.
DTW THRESHOLD PROBABILITIES...
* NONE.
DTX WATCHES/WARNINGS/ADVISORIES
MI...NONE.
LAKE HURON...SMALL CRAFT ADVISORY UNTIL 10 PM EDT THIS EVENING FOR LHZ422.
LAKE ST CLAIR...NONE.
MICHIGAN WATERS OF LAKE ERIE...NONE.
DISCUSSION...KDK
MARINE.......MV
AVIATION.....TF
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