564  
FXUS63 KGRR 190657  
AFDGRR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
257 AM EDT TUE MAR 19 2019  
 
LATEST UPDATE...  
SYNOPSIS/DISCUSSION  
   
SYNOPSIS
 
 
ISSUED AT 256 AM EDT TUE MAR 19 2019  
 
- CHANCES FOR LIGHT RAIN/SNOW WEDNESDAY AND THURSDAY NIGHT  
 

 
   
DISCUSSION
 
(TODAY THROUGH NEXT MONDAY)  
ISSUED AT 256 AM EDT TUE MAR 19 2019  
 
FAIRLY QUIET WEATHER THROUGH THE WEEKEND. P-TYPE IS AN ISSUE ON  
WEDNESDAY INTO WEDNESDAY NIGHT AS MINOR NORTHERN AND SOUTHERN  
STREAM SFC LOWS MERGE ACROSS THE CENTRAL/EASTERN GREAT LAKES.  
PRECIP IS EXPECTED TO BE LIGHT AND SURFACE TEMPERATURES ABOVE  
FREEZING DURING THIS EVENT SO TRAVEL IMPACTS ARE NOT EXPECTED  
EVEN IF THE P-TYPE GOES OVER TO SNOW WEDNESDAY EVENING.  
 
THIS IS FOLLOWED BY A QUICK HITTING SHORTWAVE TROUGH DIVING SOUTH  
FROM CENTRAL CANADA BY FRIDAY MORNING. SOME SNOW IS POSSIBLE WITH  
THIS ACROSS CENTRAL LOWER MICHIGAN BUT AGAIN, ANY AMOUNTS APPEAR  
LIGHT AND NO SIGNIFICANT IMPACTS ARE EXPECTED.  
 
A MORE SUBSTANTIAL STORM IS APPROACHING SUNDAY NIGHT INTO MONDAY  
BUT THE BULK OF IT MAY REMAIN WELL SOUTH OF LOWER MICHIGAN.  
SOMETHING TO KEEP AN EYE ON FOR NOW.  
 

 
   
AVIATION
 
(FOR THE 00Z TAFS THROUGH 00Z TUESDAY EVENING)  
ISSUED AT 1155 PM EDT MON MAR 18 2019  
 
VFR CONDITIONS WILL CONTINUE AT ALL THE TERMINALS THROUGH TUESDAY  
EVENING. SCATTERED HIGH LEVEL CLOUD COVER WILL MOVE IN FROM THE  
WEST OVERNIGHT AND SOME LOWER CLOUDS WITH CLOUD BASES AROUND 5 KFT  
AGL WILL DEVELOP TUESDAY MORNING AND AFTERNOON. WINDS WILL BE OUT  
OF THE SOUTHWEST AT OR BELOW 10 KTS THROUGH TUESDAY.  
 

 
   
HYDROLOGY
 
 
ISSUED AT 318 PM EDT MON MAR 18 2019  
 
MOST RIVERS IN OUR AREA ARE RECOVERING FROM THE SHOCK OF HEAVY  
RAINFALL AND SIGNIFICANT SNOWMELT AT THE END OF LAST WEEK. THE  
MUSKEGON RIVER FROM CROTON DAM DOWNSTREAM REMAINS NEAR OR SLIGHTLY  
ABOVE FLOOD-STAGE. SIMILARLY, PARTS OF THE GRAND RIVER AROUND  
COMSTOCK PARK AND ROBINSON TOWNSHIP, AS WELL AS THE MAPLE RIVER NEAR  
MAPLE RAPIDS ARE SLIGHTLY ABOVE FLOOD STAGE. A GRADUAL FALLING TREND  
IS EXPECTED ON ALL OF THESE RIVERS OVER THE NEXT FEW DAYS AS  
GENERALLY DRY WEATHER IS EXPECTED THROUGHOUT THIS WEEK AND INTO THE  
WEEKEND.  
 
SUBSTANTIAL AREAL FLOODING (NOT NEAR RIVERS) OCCURRED OR IS STILL  
OCCURRING IN AND NEAR NEWAYGO COUNTY, THOUGH SOME IMPROVEMENT HAS  
OCCURRED OVER THE PAST DAY. NUMEROUS HOMES HAVE BEEN AFFECTED.  
NUMEROUS ROADS ARE CLOSED, EITHER DUE TO WATER STILL OVER THE ROAD  
OR DAMAGE DONE TO THE ROADS. THIS AREA WAS AT THE UNFORTUNATE  
INTERSECTION OF HAVING A MAJORITY OF THEIR 2 TO 5 INCHES OF SNOWPACK  
WATER CONTENT MELT ALONG WITH 1 TO 2 INCHES OF RAINFALL ON THURSDAY,  
OVER A FROZEN GROUND WHICH INCREASED RUNOFF.  
 

 
   
GRR WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  

 
 

 
 
SYNOPSIS...OSTUNO  
DISCUSSION...OSTUNO  
AVIATION...LAURENS  
HYDROLOGY...AMD  
 
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