014  
FXUS63 KGRR 221916  
AFDGRR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
316 PM EDT THU MAY 22 2025  
   
KEY MESSAGES  
 
- DRY AND COOL FOR THE HOLIDAY WEEKEND  
 
- SLOW WARMING TREND NEXT WEEK, CHANCE OF RAIN MID WEEK  
 
 
 
.DISCUSSION..316 PM EDT THU MAY 22 2025  
 
- DRY AND COOL FOR THE HOLIDAY WEEKEND  
 
RADAR SHOWS THE LAST OF THE RAIN MOVING SOUTHEASTWARD ACROSS THE  
EASTERN CWA; WE SHOULD BE DRY TONIGHT.  
 
THE SURFACE LOW WILL MOVE OVER QUEBEC TONIGHT, BUT THE UPPER LOW  
WILL REMAIN IN SOME FORM FOR THE NEXT FEW DAYS. A LARGE AREA OF  
HIGH PRESSURE WILL MOVE IN BEHIND THE SURFACE LOW AND PROVIDE DRY,  
BUT COOL CONDITIONS THROUGHOUT THE HOLIDAY WEEKEND.  
 
LATEST VISIBLE LOOP SHOWS AN EXPANSIVE CLOUD SHIELD SURROUNDING  
THE UPPER LOW AND WE'RE LIKELY TO SEE A GOOD DEAL OF CLOUD OVER  
THE EASTERN CWA TONIGHT. CLEARING IS EVIDENT OVER THE WESTERN HALF  
OF THE CWA CURRENTLY AND THAT CLEARING WILL MAKE SOME INROADS  
EASTWARD TONIGHT, BUT LIKELY WON'T MAKE IT ALL THE WAY THROUGH.  
THE CLOUDS, THOUGH, WILL LIKELY PREVENT FROST FROM DEVELOPING OVER  
THE NORTHEAST CWA TONIGHT, BUT THAT MIGHT NOT BE THE CASE FRIDAY  
NIGHT.  
 
WE EXPECT MORE CLEARING FRIDAY AND FRIDAY NIGHT WHICH, UNDER HIGH  
PRESSURE, WILL HELP TEMPERATURES FALL INTO THE MID 30S ACROSS THE  
NORTHEAST CWA. GIVEN VERY LOW DEWPOINTS, WE LIKELY WON'T SEE  
ENOUGH FROST DEVELOP TO MERIT A HEADLINE, BUT WE'LL KEEP AN EYE ON  
IT.  
 
HIGHS TOMORROW WILL ONLY REACH THE MID 50S. TEMPERATURE SWILL  
FINALLY REACH THE LOWER 60S SATURDAY,MID 60S SUNDAY, AND UPPER 60S  
MONDAY. DEWPOINTS IN THE MID 40S WILL MAKE FOR COMFORTABLE  
CONDITIONS.  
 
- SLOW WARMING TREND NEXT WEEK, CHANCE OF RAIN MID WEEK  
 
THE NEXT CHANCE OF RAIN REALLY DOESN'T ARRIVE UNTIL TUESDAY  
AFTERNOON AS A SOUTHERN PLAINS LOW MOVES IN THIS DIRECTION; HIGH  
PRESSURE OVER LAKE SUPERIOR WILL KEEP SYSTEM SOUTH OF THE GREAT  
LAKES. RISING HEIGHTS AHEAD OF THE LOW WILL KEEP THE SLOW WARMING  
TREND GOING. HIGHS IN THE UPPER 60S ARE EXPECTED TUESDAY AND  
WEDNESDAY AND LOWER TO MID 70S THURSDAY.  
 
 
   
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/  
 
ISSUED AT 151 PM EDT THU MAY 22 2025  
 
LINGERING MVFR CEILINGS TO MOVE OFF AT JXN AND LAN OVER THE NEXT  
FEW HOURS. SOME LINGERING SHOWERS SHOULD MOVE OFF AS WELL...WITH  
VFR CONDITIONS SETTING UP AFTER THE SHOWERS COME TO AN END.  
 
 
   
MARINE  
 
ISSUED AT 316 PM EDT THU MAY 22 2025  
 
WIND AND WAVES WILL BEGIN TO DIMINISH THIS EVENING AND FALL BELOW  
ADVISORY CRITERIA OVERNIGHT AS LOW PRESSURE OVER ONTARIO DRIFTS  
EAST. THE CURRENT ADVISORY AND CORRESPONDING BEACH HAZARDS  
STATEMENT RUNS THROUGH 06Z WHICH LOOKS GOOD AT THIS POINT.  
 
 
   
GRR WATCHES/WARNINGS/ADVISORIES  
 
MI...BEACH HAZARDS STATEMENT UNTIL 2 AM EDT FRIDAY FOR MIZ037-043-050-  
056-064-071.  
MARINE...SMALL CRAFT ADVISORY UNTIL 2 AM EDT FRIDAY FOR LMZ844>849.  
 
 
 
 
 
DISCUSSION...04  
AVIATION...MACZKO  
MARINE...04  
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab MI Page
The Nexlab IN Page
Main Text Page