465
FXUS63 KDTX 040348
AFDDTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1148 PM EDT WED JUN 3 2026
KEY MESSAGES
- WARMING TREND THROUGH LATE WEEK.
- PERIODS OF SCATTERED TO NUMEROUS RAIN SHOWERS WITH SOME EMBEDDED
THUNDERSTORMS LIKELY FRIDAY INTO SATURDAY.
AVIATION
LIGHT AND VARIABLE TO CALM WIND BECOMES MORE CONSISTENTLY FROM THE
SOUTH AS HIGH PRESSURE BEGINS A SHIFT TOWARD THE ATLANTIC COAST LATE
TONIGHT. VFR UNDER BANDS OF CIRRUS AND THE HIGH PRESSURE DEPARTURE
ARE TIED TO MID-UPPER LEVEL RIDGE PROGRESSION AS DECAY OF THE RECENT
BLOCKING PATTERN ACCELERATES INTO THE MORNING HOURS. INCREASING SW
WIND IS THE WEATHER HIGHLIGHT FOR SE MI DURING THE DAY AS THE WIND
TREND SETS UP THE FIRST STAGE OF BOUNDARY LAYER MOISTURE INCREASE
THAT LIFTS SURFACE TD INTO THE 50S. THIS IS JUST ENOUGH FOR
SCATTERED HIGH-BASED CUMULUS TO GO ALONG WITH CIRRUS STREAMERS IN
THE CLOUD PROFILE DURING THE AFTERNOON INTO THURSDAY EVENING.
D21/DTW CONVECTION...NO THUNDERSTORMS TONIGHT THROUGH THURSDAY.
DTW THRESHOLD PROBABILITIES
* NONE.
PREV DISCUSSION
ISSUED AT 343 PM EDT WED JUN 3 2026
DISCUSSION...
A SEASONABLY STRONG 1027MB HIGH PRESSURE SYSTEM NOW OVER THE
SOUTHERN GREAT LAKES AND OHIO RIVER VALLEY WILL EXPAND INTO THE
APPALACHIA REGION TONIGHT INTO TOMORROW IN RESPONSE TO THE BREAKDOWN
OF THE LONGWAVE RIDGE ACROSS THE CENTRAL CONUS. THE CLOSED LOW
ACROSS THE NORTHERN ROCKIES HAS STARTED TO CARVE INTO THE RIDGE AS
IT TRAVELS EASTWARD, AHEAD OF THE ARRIVAL OF A PACIFIC NW TROUGH.
THIS BRINGS CONTINUED STABILITY ACROSS SE MI WHICH WILL SUSTAIN DRY
WEATHER TONIGHT AND TOMORROW. TEMPERATURES NOW IN THE LOW 80S COOL
INTO THE MID 50S OVERNIGHT UNDER MOSTLY CLEAR SKIES. THE SLIGHT
INCREASE IN MAGNITUDE OF SOUTHWEST FLOW WILL STREAM THE WARMER
TEMPERATURES ACROSS THE PLAINS INTO MICHIGAN, PUSHING HIGHS INTO THE
MID TO UPPER 80S TOMORROW. OUTSIDE OF PERIODIC TRANSLUCENT CIRRUS
THROUGH THE DAY AND WHAT WILL LIKELY BE A MEAGER ATTEMPT AT FEW-SCT
CU DEVELOPMENT GIVEN LIMITED MOISTURE IN THE COLUMN.
THE STREAK OF DRY WEATHER WILL END FRIDAY INTO SATURDAY AS A SERIES
OF SHORTWAVE TROUGHS MOVE ACROSS THE STATE BRINGING HIGH-END CHANCES
FOR MULTIPLE ROUNDS OF RAIN SHOWERS WITH EMBEDDED THUNDERSTORMS.
WEAK UPPER-JET STRUCTURE ALONG WITH POOR AMPLITUDE OF THE TROUGH AND
MODERATED BAROCLINICITY PRECLUDES ANY STRONG MENTION OF SEVERE
THUNDERSTORM POTENTIAL. GLOBAL MODELS DO HIGHLIGHT 0-6KM SHEAR
VALUES AROUND 30 KNOTS ALIGNED WITH 500-1000 J/KG CAPE DURING THE
AFTERNOON HOURS, SO CANNOT TOTALLY RULE OUT SOME STRONGER STORM
POTENTIAL. THIS WILL BE HIGHLY DICTATED ON PRIOR DAY/MORNING
ACTIVITY RAIN AND CLOUD COVER, BUT BEARS WATCHING ONCE WITHIN THE HI-
RES OUTPUT WINDOW.
THE LAST OF THE UPPER-LEVEL WAVES WILL DEPART ON SUNDAY BRINGING
MOSTLY DRY CONDITIONS TO START THE WEEK, OUTSIDE OF SOME VERY LOW
CHANCES FOR A POP-UP AFTERNOON SHOWER UNDER A WEAKLY CAPPED
ENVIRONMENT FOR SUNDAY. AN UPPER LOW ACROSS TEXAS WILL OPEN AND
TRAVEL NORTH INTO THE MIDWEST EARLY NEXT WEEK WHICH WILL AID IN THE
DEVELOPMENT OF A STRONG RIDGE ACROSS MICHIGAN ON MONDAY, BRINGING
DRY CONDITIONS. CONFIDENCE THEN TURNS MUCH LOWER REGARDING POTENTIAL
DURATION OF DRY WEATHER ALONG WITH ABOVE NORMAL TEMPERATURES AND
WILL BE PENDING THE SPEED OF THE UPPER-LEVEL RIDGE ALONG WITH THE
ASSOCIATED HIGH PRESSURE SYSTEM JUST EAST OF THE RIDGE AXIS. THE
LATEST POP VALUES HOLD AOB 20% TUE-WED WHICH WOULD ALLOW HIGHS TO
PUSH INTO THE UPPER 80S ASSUMING THE DRY FORECAST. LATEST 12Z ECMWF
AND AIFS (INCLUDING TIME LAGGED 24 HR AIFS) HIGHLIGHT THE POTENTIAL
FOR EARLY BREAKDOWN OF THE RIDGE, BRINGING SHOWER AND THUNDERSTORM
CHANCES TUE-WED. THIS SCENARIO WOULD CAP HIGHS IN THE LOW TO MID
80S.
MARINE...
A HIGH PRESSURE SYSTEM CONTINUES TO SIT ATOP THE GREAT LAKES REGION
TODAY INTO TOMORROW MORNING. THIS HIGH PRESSURE SYSTEM IS THEN
EXPECTED TO DETERIORATE DURING THE EARLY AFTERNOON HOURS AS A LOW
PRESSURE SYSTEM APPROACHES THE AREA. LIGHT WIND FLOW IS EXPECTED TO
SHIFT OVERNIGHT FROM SOUTHERNLY TO SOUTHEASTERLY IN ALL REGIONS.
THURSDAY EVENING THE COAST OF LAKE ERIE WILL HAVE LIGHT WINDS
VARYING FROM THE SOUTHEAST TO SOUTHWEST. SOUTHERN LAKE HURON AND
LAKE ST. CLAIR WILL EXPERIENCE RELATIVELY LIGHT WINDS OUT OF THE
SOUTH THURSDAY EVENING INTO THE MORNING HOURS. SAGINAW BAY WILL
EXPERIENCE MORE MODERATE SOUTHWESTERLY WINDS THURSDAY AFTERNOON INTO
THE OVERNIGHT HOURS, WITH WIND GUSTS UP TO 20 KNOTS POSSIBLE. NORTH
LAKE HURON IS EXPECTED TO HAVE MODERATE WINDS AS WELL FROM THE
SOUTH, WITH GUSTS UPWARDS OF 25 KNOTS POSSIBLE, IN THE AFTERNOON
HOURS, WITH A GRADUAL SHIFT TO LIGHTER WINDS AND MORE SOUTHWESTERLY
FLOW EXPECTED OVERNIGHT THURSDAY INTO FRIDAY MORNING.
WINDS ARE EXPECTED TO BE MODEST OUT OF THE SOUTHWEST FRIDAY FOR THE
SHORE OF LAKE ERIE, LAKE ST. CLAIR, AND SOUTHERN LAKE HURON, WITH
GUSTS UP TO 20 KNOTS POSSIBLE. SAGINAW BAY IS ALSO EXPECTED TO HAVE
MODEST FLOW OUT OF THE SOUTHWEST, WITH PERSISTENT WINDS OF UP TO 20
KNOTS POSSIBLE, ALONG WITH GUSTS OF UP TO 25 KNOTS POSSIBLE AS WELL.
NORTH LAKE HURON IS EXPECTED TO HAVE RELATIVELY CALMER WINDS OUT OF
THE SOUTH FRIDAY, WITH GUSTS OF 20 KNOTS POSSIBLE CLOSER TO THE
SHORE.
LIGHT WINDS ARE EXPECTED TO SHIFT FROM SOUTHWESTERLY TO NORTHERNLY
SATURDAY IN THE LAKE HURON AREA, WITH GUSTS OF UP TO 20 KNOTS
POSSIBLE IN THE BAY AREA. LAKE ST. CLAIRE AND THE COAST OF LAKE ERIE
ARE EXPECTED TO GRADUALLY SHIFT FROM SOUTHWESTERLY TO WESTERLY FLOW
SATURDAY, WITH GUSTS OF 20 KNOTS POSSIBLE IN THE MORNING HOURS.
RAIN SHOWERS ARE EXPECTED FOR ALL REGIONS FRIDAY EVENING AS A COLD
FRONT ASSOCIATED WITH THIS LOW PRESSURE SYSTEM TREKS ACROSS THE
GREAT LAKES REGION. SCATTERED SHOWERS ARE POSSIBLE THROUGHOUT THE
DAY SATURDAY AS THIS LOW PRESSURE SYSTEM DEPARTS OUR AREA.
THUNDERSTORMS CANNOT BE RULED OUT EITHER.
DTX WATCHES/WARNINGS/ADVISORIES
MI...NONE.
LAKE HURON...NONE.
LAKE ST CLAIR...NONE.
MICHIGAN WATERS OF LAKE ERIE...NONE.
AVIATION.....BT
DISCUSSION...AM
MARINE.......ZO/KDK
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AT WWW.WEATHER.GOV/DETROIT.
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