485
FXUS63 KGRR 280638
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
238 AM EDT TUE APR 28 2026
KEY MESSAGES
- LINGERING SHOWERS AND STORMS TOWARDS MORNING; SHOWERS TONIGHT
- UNSETTLED, COLDER WEATHER THROUGH THE WEEK AND INTO THE WEEKEND
DISCUSSION
ISSUED AT 238 AM EDT TUE APR 28 2026
- LINGERING SHOWERS AND STORMS TOWARDS MORNING; SHOWERS TONIGHT
WINDS HAVE SHIFTED TO THE SOUTHWEST AND WILL CONTINUE TO SHIFT
WESTWARD AS THE FRONT APPROACHES. IN THE WAKE OF THE WAKE LOW, THE
COLD FRONT WILL CONTINUE TO SPARK SHOWERS AND STORMS THROUGH EARLY
TUESDAY MORNING. WITH WEAKER FLOW AND LACK OF SURFACE INSTABILITY
SHOWERS STORMS WILL BE FAIRLY BENIGN. SHOWERS AND STORMS WILL BE
MAINLY ALONG AND NORTH OF THE I 96 CORRIDOR THIS MORNING WITH THE
BEST ARE THROUGH THE NORTHWEST; ALONG AND NORTH OF THE US 10
CORRIDOR.
THIS FRONT IS EXPECTED TO CLEAR OUT MIDDAY WITH CLEARING SKIES
AS THE DAY CONTINUES. A LARGE MID LEVEL AND SURFACE LOW WILL
CONTINUE TO MOVE TO THE NORTHEAST AS THE POSITIVELY TILTED UPPER
LEVEL LOW CONTINUES TO BRING NORTHWESTERLY FLOW INTO THE REGION
TONIGHT INTO WEDNESDAY MORNING. MOISTURE ADVECTION WILL MOVE
NORTHWARD FROM THE SOUTH TONIGHT INTO WEDNESDAY. THAT SYSTEM
SHOULD BRING SOME SCATTERED SHOWERS SOUTH OF THE I 96 CORRIDOR.
HOWEVER THE BEST MOISTURE, INSTABILITY AND FORCING REMAINS IN
INDIANA SO THUNDER IS NOT EXPECTED.
- UNSETTLED, COLDER WEATHER THROUGH THE WEEK AND INTO THE WEEKEND
THE ABOVE MENTIONED UPPER LEVEL LOW WILL CONTINUE TO DOMINATE THE
WEATHER PATTERN THROUGH THE REST OF THE WEEK AND THE WEEKEND. THAT
LOW WILL MOVE SOUTHWARD OVER THE GREAT LAKES AND CYCLE TROUGHS
THROUGH THE AREA THROUGH THE WEEK.
WHILE PRECIPITATION WILL REMAIN LIGHT, THE UPPER LOW WILL ADVECT
COLD NORTHERLY FLOW INTO THE REGION. THIS WILL KEEP MAX TEMPS
THROUGH THE WEEK AND THE WEEKEND IN THE 50S. EXPECT LOWS TO
DROP INTO THE 30S LATE THIS WEEK, INTO THIS WEEKEND. THE MID
LEVEL MOISTURE INTO FRIDAY MORNING SHOULD PRECLUDE ANY
FROST/FREEZE HEADLINES FOR NOW. HOWEVER AS DRIER AIR MOVES
OVERHEAD, ALONG WITH 850 MB TEMPS AS LOW AS -7C SATURDAY MORNING,
FROST AND FREEZE WILL BECOME A CONCERN.
THAT LOW WILL LIFT EASTWARD WITH WARM AIR ADVECTION EARLY NEXT
WEEK.
AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/
ISSUED AT 233 AM EDT TUE APR 26 2026
CEILINGS ARE GOING TO IFR AND TEMPO LIFR IN THE HEAVIER SHOWERS
AND THUNDERSTORMS EARLY TUESDAY MORNING. A LINE OF SHOWERS AND
THUNDERSTORMS IS WORKING INTO MICHIGAN ALONG A COLD FRONT THIS MORNING.
A FEW VICINITY SHOWERS WILL LINGER AFTER THE BULK OF THE
ACTIVITY PUSHES EAST OUT OF THE FORECAST AREA BEYOND 9Z. CEILINGS
WILL TREND MORE SOLIDLY MVFR TO EVENTUALLY VFR TUESDAY BEHIND THE
FRONT. WINDS WILL CONTINUE TO VEER TO A MORE WESTERLY DIRECTION,
AND MAY GUST TO AROUND 30 KTS THROUGH TUESDAY AFTERNOON BEFORE
EASING TUESDAY EVENING.
MARINE
ISSUED AT 238 AM EDT TUE APR 28 2026
THE LAKESHORE IS FINALLY BECOME SLIGHTLY LESS TUMULTUOUS
OVERNIGHT. SHOWERS AND STORMS HAVE MOVED TO THE EAST. HOWEVER, THE
SOUTHWESTERLY FLOW REMAINS GUSTY SO WILL KEEP THE SMALL CRAFT
ADVISORY THROUGH THE MORNING. WINDS WILL SHIFT TO THE WEST BUT THE
GRADIENT WILL CONTINUE TO SLACKEN AS THE DAY CONTINUES. WAVES
WILL SLOWLY SUBSIDE SO ANTICIPATE ANY HEADLINES TO DROP TUESDAY
AFTERNOON. WHILE WINDS WILL PEAK A LITTLE WEDNESDAY, DO NOT
ANTICIPATE ANY HEADLINES WILL BE NECESSARY.
GRR WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 PM EDT THIS EVENING FOR LMZ844>849.
DISCUSSION...CERU
AVIATION...WOOD
MARINE...CERU
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