259
FXUS63 KGRR 021729
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
129 PM EDT SAT MAY 2 2026
KEY MESSAGES
- ANOTHER CHANCE FOR FROST TONIGHT
- OCCASIONAL SHOWERS THROUGH NEXT WEEK
DISCUSSION
ISSUED AT 220 AM EDT SAT MAY 2 2026
- ANOTHER CHANCE FOR FROST TONIGHT
AN AREA OF CLOUDS CONTINUES TO MOVE THROUGH WESTERN MICHIGAN
HELPING TEMPERATURES STAY SLIGHTLY WARMER, BUT ONCE THEY CLEAR
TEMPERATURES QUICKLY DROP. EXPECT MORNING TEMPERATURES TO BE IN
THE UPPER 20S TO LOW 30S BEFORE WARMING UP INTO THE LOW 50S TODAY.
CLOUDS BUILD BACK IN WITH THE SHORTWAVE TROUGH MOVING THROUGH THIS
AFTERNOON, BUT ARE EXPECTED TO CLEAR BRIEFLY OVERNIGHT. NORTHWEST
WINDS COULD BECOME BREEZY JUST PRIOR TO SUNSET WITH GUSTS TO 30
MPH.
THERE WILL BE A WINDOW FOR FROST TONIGHT AFTER MIDNIGHT. THE BEST
CHANCE WILL BE EAST OF THE 131 CORRIDOR AS CLOUD COVER IS
EXPECTED TO MOVE IN EARLY SUNDAY MORNING. TEMPERATURES WILL
QUICKLY IMPROVE AS THE CLOUD COVER MOVES IN AHEAD OF OUR NEXT
CHANCE FOR RAIN.
- OCCASIONAL SHOWERS THROUGH NEXT WEEK
THE SHORTWAVE TROUGH MOVING THROUGH THE AREA SUNDAY WILL BRING
ISOLATED TO SCATTERED SHOWERS BEFORE DRY CONDITIONS RETURN BY
SUNDAY EVENING. AS THE LOW LEVEL JET MOVES THROUGH EXPECT WINDS
TO PICK UP WITH PEAK GUSTS DURING THE AFTERNOON. SOUTHWEST WINDS
GUSTING 25 TO 35 MPH ARE LIKELY (60 PERCENT OR HIGHER) WITH A 20
PERCENT CHANCE FOR GUSTS TO 40 MPH.
SOUTHWEST FLOW WILL BECOME MORE DOMINANT INTO NEXT WEEK. UPPER
LEVEL DIVERGENCE SETS UP MONDAY NIGHT WITH THE APPROACHING
TROUGH AND POSITIVE VORTICITY ADVECTION. THIS TROUGH WILL BE SLOW
MOVING KEEPING US IN THE SOUTHWEST FLOW UNTIL IT PASSES THURSDAY.
THIS WILL KEEP RAIN CHANCES OVER THE AREA, ESPECIALLY ALONG AND
SOUTH OF I-69. INSTABILITY IS LOW, BUT COULD STILL SEE A RUMBLE
OF THUNDER MONDAY NIGHT. WITH THE CLOUD COVER AND RAINFALL THROUGH
THE WEEK, LOW TEMPERATURES WILL REMAIN WARMER THAN OVER THIS
WEEKEND, HOWEVER CHANCES FOR FROST STILL REMAIN FOR THE SECOND
HALF OF THE WEEK AS RAIN AND CLOUD COVER CLEARS, ESPECIALLY FOR
AREAS NORTH OF M-20.
AVIATION /18Z TAFS THROUGH 18Z SUNDAY/
ISSUED AT 126 PM EDT SAT MAY 2 2026
DIURNAL CU DEVELOPED AS EXPECTED THIS MORNING AND WILL DISSIPATE
AROUND SUNSET. LOW LEVEL WINDS WILL INCREASE OVERNIGHT AHEAD OF A
COLD FRONT AND WE INCLUDED LLWS FOR THAT. WE'LL ALSO SEE A MID
DECK OF CLOUDS MOVE IN FROM THE NORTHWEST.
MARINE
ISSUED AT 220 AM EDT SAT MAY 2 2026
LIGHT NORTHWEST WINDS ARE EXPECTED TODAY BEFORE BECOMING
SOUTHWESTERLY TONIGHT. WINDS AND WAVES BUILD OVERNIGHT INTO
SUNDAY WITH SMALL CRAFT ADVISORY CONDITIONS LIKELY BY SUNDAY
MORNING. A BRIEF LULL IN SMALL CRAFT ADVISORY CONDITIONS IS
POSSIBLE SUNDAY NIGHT INTO MONDAY, BEFORE SOUTHWEST WINDS AND
WAVES PICK BACK UP. LIGHTER, NORTHERLY WINDS THEN RETURN FOR
TUESDAY AND CONTINUE INTO THURSDAY.
GRR WATCHES/WARNINGS/ADVISORIES
MI...FROST ADVISORY FROM MIDNIGHT TONIGHT TO 8 AM EDT SUNDAY FOR
MIZ038-045-046-051-052-058-059-066-067-073-074.
FREEZE WARNING FROM MIDNIGHT TONIGHT TO 8 AM EDT SUNDAY FOR
MIZ039-040.
MARINE...SMALL CRAFT ADVISORY FROM 8 AM TO 8 PM EDT SUNDAY FOR LMZ844>849.
DISCUSSION...RAH
AVIATION...04
MARINE...RAH
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