Most of west central and southwestern lower Michigan has been placed under a hydrologic advisory for river rises through Thanksgiving. This is both due to oncoming snowmelt from the big storm as well as more rain which is slated to fall this week. Below is the text of the outlook.
HYDROLOGIC OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1126 AM EST TUE NOV 24 2015 ...RIVER RISES EXPECTED THROUGH THE THANKSGIVING HOLIDAY... THE CURRENT SNOW PACK IS EXPECTED TO COMPLETELY MELT OFF BY THE END OF THE WEEK. THE GREATEST DEPTH IS NEAR AND EAST OF I-69 WHERE 4 TO 8 INCHES OF SNOW IS ON THE GROUND. THE WATER CONTENT OF THE SNOW PACK IN THIS AREA RANGES FROM A FEW TENTHS OF AN INCH TO APPROACHING ONE INCH ACROSS SOUTHERN JACKSON COUNTY. FORECAST RAINFALL AMOUNTS OF ONE HALF TO ONE INCH OR POSSIBLY GREATER WILL FALL FROM WEDNESDAY NIGHT THROUGH FRIDAY. HOWEVER...THE GREATEST AMOUNTS ARE EXPECTED TO OCCUR NORTHWEST OF THE HARDEST HIT AREAS FROM THIS PAST WEEKEND. THIS COULD POSSIBLY CHANGE SO CONTINUE TO MONITOR UPDATED FORECASTS. RIVERS WILL BEGIN RISING AS THE SNOW MELTS AND THE RAINS OCCUR. CURRENT RIVER FORECASTS ARE BEGINNING TO INCORPORATE SOME OF THE ANTICIPATED SNOW MELT...SUCH AS THE SYCAMORE CREEK AT HOLT. FUTURE RIVER FORECASTS WILL START INCLUDING THE EXPECTED RAINFALL OVER THE THANKSGIVING HOLIDAY AND IT IS POSSIBLE THAT SOME SMALL RIVERS AND STREAMS COULD REACH OR EXCEED BANKFULL. REFER TO THE NWS GRAND RAPIDS ADVANCED HYDROLOGIC PREDICTION SERVICE AT HTTP://WATER.WEATHER.GOV/AHPS2/INDEX.PHP?WFO=GRR FOR MORE INFORMATION.
Some flooding conditions can be expected in these areas. Take precautions if you encounter flooded roadways. The phrase, "turn around - don't drown" is always best remembered.
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