178
FXUS63 KGRR 062346
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
746 PM EDT WED MAY 6 2026
KEY MESSAGES
- FROST AND FREEZE CONDITIONS THURSDAY MORNING
- COOL WITH RAIN POSSIBLE THROUGH THE WEEKEND
DISCUSSION
ISSUED AT 256 PM EDT WED MAY 6 2026
- FROST AND FREEZE CONDITIONS THURSDAY MORNING
SOME OF THE GUIDANCE DID TREND WARMER. HOWEVER, 850 MB
TEMPERATURES WILL BE COLDER THAN LAST NIGHT. COUPLE THAT WITH
DRIER AIR, CALMING WIND AND A MODERATE INVERSION AND WIDESPREAD
FROST DEVELOPMENT WITH FREEZING TEMPERATURES NORTH OF 96 REMAIN
LIKELY. AS SUCH, A SLIGHTLY EXPANDED FREEZE WARNING HAS BEEN
ISSUED WITH A FROST ADVISORY FOR THE REST OF LOWER MICHIGAN.
PLEASE TAKE ACTION TO PROTECT ANY SENSITIVE VEGETATION.
- COOL WITH RAIN POSSIBLE THROUGH THE WEEKEND
A LARGE UPPER LEVEL LOW CURRENTLY SITUATED OVER HUDSON BAY WILL
DOMINATE THE WEATHER PATTERN THROUGH THE REST OF THE WEEK AND
THROUGH THE WEEKEND. THE UPPER LEVEL LOW WILL RETROGRADE AS IT
ROTATES. AS IT DOES THIS, IT WILL SWING THROUGH MID AND UPPER
LEVEL SHORT WAVES THROUGH THE FIRST HALF OF NEXT WEEK.
THIS PATTERN WILL KEEP COOLER TEMPERATURES OVER THE GREAT LAKES
WITH PERIODS SHOWERS POSSIBLE IN THE AFTERNOON AND EVENING
TIMEFRAME.
THE BEST CHANCE FOR SHOWERS WILL BE THE THE FRONT THAT IS STILL
EXPECTED TO MOVE THROUGH LATE SATURDAY INTO SUNDAY. BEST CHANCES
REMAIN ALONG AND SOUTH OF I 94.
AVIATION /00Z TAFS THROUGH 00Z FRIDAY/
ISSUED AT 746 PM EDT WED MAY 6 2026
IFR CONDITIONS ARE NOT ANTICIPATED. MAIN CHANGES THIS UPDATE WAS
TO EXPLICITLY MENTION GUSTS DEVELOPING THURSDAY AFTERNOON. ADDITIONALLY,
EXPECT MORE CLOUDINESS DURING THE DAY THURSDAY WITH A BROKEN LAYER
GENERALLY ABOVE 5000 FEET AGL.
MARINE
ISSUED AT 256 PM EDT WED MAY 6 2026
WINDS WILL BE OUT OF THE WEST AND SHIFT TO THE NORTH OVERNIGHT
WINDS WILL REMAIN BELOW CRITERIA THROUGH THE END OF THE WEEK. GUSTS
MAY APPROACH SMALL CRAFT ADVISORY LEVELS SATURDAY BEFORE THE
FRONT MOVES THROUGH SATURDAY NIGHT INTO SUNDAY. NORTHWEST WINDS
AND THEN EXPECTED FOR SUNDAY AND MONDAY. WAVES ARE EXPECTED TO BE
AROUND 2 FEET OR LESS THROUGH THE FORECAST PERIOD.
GRR WATCHES/WARNINGS/ADVISORIES
MI...FREEZE WARNING FROM 1 AM TO 8 AM EDT THURSDAY FOR MIZ037>040-
044>046.
FROST ADVISORY FROM 1 AM TO 8 AM EDT THURSDAY FOR MIZ043-050>052-
056>059-064>067-071>074.
MARINE...NONE.
DISCUSSION...CERU
AVIATION...TJT
MARINE...CERU
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