250
FXUS63 KGRR 010545
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
145 AM EDT FRI MAY 1 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 /06Z TAFS THROUGH 06Z SATURDAY/
ISSUED AT 145 AM EDT FRI MAY 1 2026
WE ARE SEEING LIGHT RAIN CONTINUING ACROSS THE I-94 TERMINALS
EARLY THIS MORNING. ALL OF THE SITES ARE NOW VFR AFTER A LITTLE
MVFR BRIEFLY. THIS RAIN SHOULD MOVE OUT GRADUALLY FROM WEST TO
EAST THROUGH 10Z.
THE OTHER SITES ARE CURRENTLY VFR, BUT WE ARE WATCHING FOR SOME
MVFR POSSIBLE AT KMKG AND KGRR AS SOME STRATOCUMULUS AND A FEW
SHOWERS COME OFF OF LAKE MICHIGAN AROUND OR JUST AFTER DAYBREAK.
ANY MVFR SHOULD LIFT TO VFR. ALL INLAND TERMINALS WILL SEE A
CHANCE OF A FEW SHOWERS THROUGH THE AFTERNOON AND EARLY EVENING
HOURS AS THEY POP UP DURING PEAK HEATING WITH THE COLD POOL ALOFT
OVERHEAD.
EVERYTHING SHOULD DIMINISH AFTER SUNSET, AND SKIES WILL GO MOSTLY
CLEAR WITH A LIGHT FLOW FROM THE NW.
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 UNTIL 8 AM EDT THIS MORNING FOR MIZ037-043>046-
051-052.
FREEZE WATCH FROM LATE TONIGHT THROUGH SATURDAY MORNING FOR
MIZ037>040-043>046-050>052-056>059-064>067-071>074.
FREEZE WARNING UNTIL 8 AM EDT THIS MORNING FOR MIZ038>040.
MARINE...NONE.
DISCUSSION...OSTUNO
AVIATION...NJJ
MARINE...OSTUNO
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