770  
FGUS83 KGRR 170135  
RVSGRR  
MIC037-067-180335-  
 
HYDROLOGIC STATEMENT  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
835 PM EST FRI FEB 16 2018  
 
THE FOLLOWING FORECASTS ARE FOR RIVERS IN SOUTHWEST LOWER MICHIGAN...  
 
.WATER FROM SNOW MELT THAT OCCURRED DURING A MID-WEEK WARM-UP WILL  
CONTINUE RUNNING OFF INTO RIVERS THROUGH THE END OF THE WEEK. THIS  
MAY CAUSE WATER LEVELS ALONG THE GRAND RIVER NEAR IONIA AND THE MAPLE  
RIVER NEAR MAPLE RAPIDS TO REACH ABOVE BANKFULL SATURDAY NIGHT INTO  
SUNDAY. SIGNIFICANT FLOODING IS NOT EXPECTED, BUT WATER AND ICE MAY  
SPILL INTO LOW-LYING AREAS ALONG THE RIVER. ADDITIONAL PRECIPITATION  
THROUGH THE WEEKEND WILL FALL AS LIGHT SNOW SATURDAY NIGHT, AND WILL NOT  
CONTRIBUTE TO RUNOFF. ICE JAMS ARE ALSO STILL OCCURRING ON AREA RIVERS,  
AND MAY CAUSE FLUCTUATIONS IN WATER LEVELS.  
 
WIDESPREAD RAINFALL OF BETWEEN 1 AND 2 INCHES AND WARMER TEMPERATURES  
EARLY NEXT WEEK WILL CREATE A GREATER RISK FOR RIVER FLOODING, AND WILL  
NEED TO BE MONITORED VERY CLOSELY.  
 
THE FORECASTS BELOW ARE BASED ON 48 HOUR PRECIPITATION THROUGH SUNDAY  
EVENING, AND DO NOT TAKE INTO ACCOUNT RAIN THAT IS FORECAST MONDAY  
AND TUESDAY.  
 
FOR THE GRAND RIVER AT IONIA... THE LATEST STAGE WAS 13.1 FEET AT 8  
PM FRIDAY. NO FLOODING IS FORECAST. THE MAXIMUM STAGE FORECASTED  
IS 14.8 FEET EARLY THURSDAY MORNING. FLOOD STAGE IS 21.0 FEET.  
 
FOR THE MAPLE RIVER AT MAPLE RAPIDS... THE LATEST STAGE WAS 5.2 FEET  
AT 8 PM FRIDAY. NO FLOODING IS FORECAST. THE MAXIMUM STAGE  
FORECASTED IS 7.5 FEET WEDNESDAY MORNING. FLOOD STAGE IS 9.0 FEET.  
AT 7.0 FEET... RIVER IS BANKFULL. EXPECT MINOR FLOODING IN LOW LYING  
PASTURES, FARMLAND, AND WOODED AREAS ADJACENT TO THE RIVER..  
 
SAFETY MESSAGE...CAUTION IS URGED WHEN WALKING NEAR RIVERBANKS.  
 
STAY TUNED TO FURTHER DEVELOPMENTS BY LISTENING TO YOUR LOCAL  
RADIO... TELEVISION... OR NOAA WEATHER RADIO STATION FOR FURTHER  
INFORMATION.  
 
ADDITIONAL WEATHER AND RIVER INFORMATION CAN BE FOUND ON OUR HOMEPAGE  
AT WWW.WEATHER.GOV/GRR  
 
 
 

 
 
FLOOD OBSERVED FORECAST 7AM  
LOCATION STAGE STAGE DAY TIME SAT SUN MON  
 
GRAND RIVER  
IONIA 21.0 13.1 FRI 08 PM 14.5 14.4 14.1  
 
MAPLE RIVER  
MAPLE RAPIDS 9.0 5.2 FRI 08 PM 6.9 7.2 7.3  
 

 
 
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