413  
FXUS63 KGRR 032343  
AFDGRR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
643 PM EST WED MAR 3 2021  
 
LATEST UPDATE...  
AVIATION  
   
SYNOPSIS
 
 
ISSUED AT 243 PM EST WED MAR 3 2021  
 
- HIGH PRESSURE/QUIET WEATHER THROUGH THE WEEKEND  
 
- LOW PRESSURE APPROACHES FROM THE WEST WITH WET WEATHER MID-WEEK  
 

 
   
DISCUSSION
 
(THIS EVENING THROUGH NEXT WEDNESDAY)  
ISSUED AT 243 PM EST WED MAR 3 2021  
 
- HIGH PRESSURE/QUIET WEATHER THROUGH THE WEEKEND  
 
DRY NORTHERLY FLOW WILL PERSIST INTO EARLY NEXT WEEK WITH SFC  
RIDGING INTO MONDAY. FAIRLY GOOD MODEL AGREEMENT THROUGH THIS  
PERIOD DEPICTING THE SURFACE HIGH MOVING EAST ON MONDAY. A  
NORTHERN STREAM LOW AND TRAILING FRONT ON MONDAY NOW APPEARS TO BE  
TOO FAR NORTH TO BRING A CHANCE OF MEASURABLE PRECIP ON MONDAY TO  
OUR FORECAST AREA.  
 
- LOW PRESSURE APPROACHES FROM THE WEST WITH WET WEATHER MID-WEEK  
 
THE WEATHER GETS MORE INTERESTING NEXT WEEK AS UPPER TROUGHING  
ACROSS THE WESTERN CONUS MOVES EAST AND A STRONG SFC CYCLONE  
TRACKS THROUGH THE NORTHERN PLAINS. STILL ENOUGH ENSEMBLE SPREAD  
TO HAVE SOME DOUBTS AS TO HOW MUCH PRECIP THIS BRINGS AS THE LOW  
OCCLUDES WELL WEST OF THE GREAT LAKES. WE CAN EXPECT SOME WARM  
ADVECTION RAIN MOVING IN BY TUESDAY NIGHT OR WEDNESDAY THEN THE  
OCCLUDED OR COLD FRONT MOVES THROUGH ON WEDNESDAY OR THURSDAY.  
 

 
   
AVIATION
 
(FOR THE 00Z TAFS THROUGH 00Z THURSDAY EVENING)  
ISSUED AT 638 PM EST WED MAR 3 2021  
 
THE WIND WILL BE SWINGING AROUND TO THE NORTHWEST TO NORTH  
DIRECTION. WHILE MAINLY SCATTERED CLOUD COVER IS FORECAST...WE  
WILL NEED TO MONITOR THE POSSIBILITY OF A FEW PERIODS OF MVFR  
CEILINGS...MAINLY FOR KLAN LATER TONIGHT INTO THURSDAY. CONFIDENCE  
WAS NOT HIGH ENOUGH TO GO WITH MVFR CONDITIONS AT THIS TIME.  
 

 
   
MARINE
 
 
ISSUED AT 243 PM EST WED MAR 3 2021  
 
WE HAVE ISSUED A SMALL CRAFT ADVISORY FOR TONIGHT FOR NORTH OF  
PENTWATER AS NORTH WINDS BUILD 4 FOOT WAVES ALONG THE SABLE  
POINTS.  
 

 
   
GRR WATCHES/WARNINGS/ADVISORIES
 
 
MI...NONE.  
LM...SMALL CRAFT ADVISORY UNTIL 7 AM EST THURSDAY FOR LMZ849.  
 

 
 

 
 
SYNOPSIS...OSTUNO  
DISCUSSION...OSTUNO  
AVIATION...MJS  
MARINE...OSTUNO  
 
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