322
FXUS63 KGRR 301805
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
205 PM EDT THU APR 30 2026
KEY MESSAGES
- COLD WITH FROST/FREEZE CONDITIONS INTO SATURDAY
- BELOW NORMAL TEMPERATURES DOMINATE THE FIRST WEEK OF MAY
DISCUSSION
ISSUED AT 205 PM EDT THU APR 30 2026
- COLD WITH FROST/FREEZE CONDITIONS INTO SATURDAY
WE HAVE ISSUED A FREEZE WARNING FOR THE NORTH INTERIOR FORECAST
AREA AND A FROST ADVISORY SURROUNDING THAT AREA. TEMPERATURES ARE
EXPECTED TO BE SLIGHTLY COLDER THAN LAST NIGHT, BUT CLOUDS SHOULD
ONCE AGAIN IMPEDE WIDESPREAD FROST FORMATION.
FRIDAY NIGHT WILL SEE THE COLD AIR REMAIN IN PLACE ALONG WITH
LOWER DEW POINTS AND MOSTLY CLEAR SKIES, ALLOWING TEMPERATURES TO
TANK INTO THE 20S ACROSS MUCH OF THE INTERIOR CWA AND AT OR BELOW
32F ELSEWHERE. SO A FREEZE WATCH IS IN EFFECT ACROSS THE ENTIRE
FORECAST AREA.
- BELOW NORMAL TEMPERATURES DOMINATE THE FIRST WEEK OF MAY
PERSISTENT UPPER TROUGHING IS IN STORE FOR THE GREAT LAKES REGION
THROUGH NEXT WEEK, WITH NEAR NORMAL TEMPERATURES EARLY IN THE
WEEK CRASHING TO ABOUT 10 DEGREES BELOW NORMAL BY THE END OF THE
WEEK WITH MORE FREEZING CONDITIONS POSSIBLE ACROSS THE NORTHERN
INTERIOR AT LEAST. THE GOOD NEWS IS THAT NO HEAVY RAIN OR SEVERE
WEATHER IS EXPECTED IN THE DOMINANT NORTHWEST FLOW REGIME.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
ISSUED AT 128 PM EDT THU APR 30 2026
SCATTERED TO BROKEN VFR CU WAS NOTED ON LATEST VISIBLE IMAGERY.
UPSTREAM CLOUDINESS WILL MOVE ACROSS THE TERMINALS TONIGHT AS LOW
PRESSURE MOVES ACROSS NORTHERN IN. LIGHT RAIN IS POSSIBLE AT THE
I-94 TERMINALS AND A PROB30 GROUP WAS ADDED FOR THIS.
MARINE
ISSUED AT 205 PM EDT THU APR 30 2026
WINDS AND WAVES ARE CURRENTLY FORECAST TO REMAIN BELOW SCA
CONDITIONS THROUGH SATURDAY. THERE COULD BE BRIEF GUSTS TO 25
KNOTS AT TIMES ON FRIDAY, WITH A BETTER CHANCE ON SUNDAY AS LOW
PRESSURE APPROACHES FROM THE NORTHWEST AND SOUTHWEST WINDS
INCREASE.
GRR WATCHES/WARNINGS/ADVISORIES
MI...FROST ADVISORY FROM 2 AM TO 8 AM EDT FRIDAY FOR MIZ037-043>046-
051-052.
FREEZE WATCH FROM LATE FRIDAY NIGHT THROUGH SATURDAY MORNING FOR
MIZ037>040-043>046-050>052-056>059-064>067-071>074.
FREEZE WARNING FROM 2 AM TO 8 AM EDT FRIDAY FOR MIZ038>040.
MARINE...NONE.
DISCUSSION...OSTUNO
AVIATION...04
MARINE...OSTUNO
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