963
FXUS63 KGRR 272351
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
751 PM EDT WED MAY 27 2026
KEY MESSAGES
- CHANCE OF EVENING STORMS SOUTH/EAST OF GRAND RAPIDS
- DRY AND MILD THURSDAY INTO THE MIDDLE OF NEXT WEEK.
DISCUSSION
ISSUED AT 222 PM EDT WED MAY 27 2026
- CHANCE OF EVENING STORMS SOUTH/EAST OF GRAND RAPIDS
SURFACE OBS REVEAL A WEAK FRONTAL BOUNDARY BISECTING THE LOWER
PENINSULA ROUGHLY FROM WHITEHALL TO ALMA. DEWPOINTS ARE IN THE MID
40S NORTH OF THE BOUNDARY AND MID 50S SOUTH OF THERE. SBCAPE IS
AROUND 500 J/KG BUT IS PROGD TO INCREASE TO AROUND 1000 J/KG BY
LATE AFTERNOON. THUS WE'LL RETAIN THE LOW CHANCE POPS SOUTH OF
I-96 THROUGH THE AFTERNOON AND EARLY EVENING; SEVERE STORMS ARE
NOT EXPECTED. HOWEVER, SOME GUSTY WINDS ARE POSSIBLE GIVEN DCAPE
NEAR 900 J/KG.
- DRY AND MILD THURSDAY INTO THE MIDDLE OF NEXT WEEK.
AN OMEGA BLOCK WILL BE IN PLACE FOR MUCH OF THE NEXT WEEK WITH
RIDGING OVER THE GREAT LAKES. THIS MEANS LITTLE CHANCE OF RAINFALL
AND WARMER THAN NORMAL TEMPERATURES. HIGH TEMPERATURES IN THE MID
TO UPPER 70S AND LOWS IN THE LOWER TO MID 50S ARE EXPECTED.
DEWPOINTS WILL BE IN THE LOWER TO MID 40S. ONCE THE BLOCK BREAKS
DOWN, A COLD FRONT IS PROGD TO MOVE THROUGH NEXT THURSDAY WHICH
SHOULD BE OUR NEXT CHANCE OF RAIN.
AVIATION /00Z TAFS THROUGH 00Z FRIDAY/
ISSUED AT 738 PM EDT WED MAY 27 2026
A FRONTAL BOUNDARY WILL CONTINUE TO MOVE THROUGH THE SOUTH OVER
THE NEXT FEW HOURS. THE ONLY AVIATION CONCERN WILL BE UNTIL 03Z.
GIVEN THE UNCERTAINTY HAVE PUT VICINITY SHOWERS FOR GRR WITH PROB
30S FOR THE SOUTHERN TAF SITES. HAVE TIMED OUT THE LINE FOR SOME
TEMPO PERIODS OF MVFR SHOWERS. STRONG GUSTY NORTHWEST SURFACE
WINDS GREATER UPWARDS OF 30 KNOTS REMAIN POSSIBLE. AFTER 03Z
EXPECTING VFR TO DOMINATE THE PATTERN.
MARINE
ISSUED AT 222 PM EDT WED MAY 27 2026
NNE WINDS WILL INCREASE BEHIND A FRONTAL BOUNDARY THAT'S DRAPED
ACROSS THE CENTRAL PART OF LAKE MI AS THE BOUNDARY MOVES SOUTH.
WINDS MAY GUST TO 25 KNOTS, ESPECIALLY NORTH OF GRAND HAVEN LATER
TONIGHT AND THURSDAY. WE'VE ISSUED A SMALL CRAFT ADVISORY AND
BEACH HAZARDS STATEMENT FOR THE ENTIRE NEARSHORE THROUGH 00Z
FRIDAY.
GRR WATCHES/WARNINGS/ADVISORIES
MI...BEACH HAZARDS STATEMENT THROUGH THURSDAY EVENING FOR MIZ037-043-
050-056-064-071.
MARINE...SMALL CRAFT ADVISORY UNTIL 8 PM EDT THURSDAY FOR LMZ844>849.
DISCUSSION...04
AVIATION...CERU
MARINE...04
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