The August 9th-11th Rain Event


A slow moving upper level low pressure system rotated across Southeast Michigan, bringing a prolonged period

of steady rainfall to much of the area, beginning Thursday the 9th and lasting through early Saturday morning the

11th. For much of the area, this rain provided relief from the moderate to severe drought which had gripped Southern

Michigan since June. However, some locations received too much rain and experienced flooding. Over these two days

most of southeast Michigan received between one and three inches of rain. However, the Saginaw Valley  received

between 3 and 8 inches and a few local spots along the M 59 corridor received 3 to 6 inches. Tri Cities airport (MBS)

had a two day rainfall total of just over 8 inches! Of this, 6.93 inches fell during Friday the 10th. This shattered the

previous 1 day record of 5.51 inches which occurred on September 10th, 1986 during one of the most extreme rain

events in recent history. Prior to this rainfall, Saginaw was on target to have one of its driest summers on record.

After this rainfall event, the rainfall total for the summer of 2012 (Jun-Aug) stands at 14.81 inches which now ranks

as the 4th wettest summer on record. Below is a list of storm total rainfall reports along with an image of the total

rainfall from August 9th through the morning of August 11th based off radar estimates.


 Storm Total Rainfall Reports from August 9th through 11th

000 NOUS43 KDTX 040101 PNSDTX MIZ047>049-053>055-060>063-068>070-075-076-082-083-040330- PUBLIC INFORMATION STATEMENT...STORM TOTALS NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 801 PM EST TUE MAR 3 2015 STORM TOTAL FREEZING RAIN REPORTS LOCATION PRECIP DURATION (INCHES) (HOURS) LAT LON ...MACOMB COUNTY... EASTPOINTE M 0.15 7.5 42.47N 82.96W ...MONROE COUNTY... MONROE M 0.16 7 41.92N 83.39W ...WASHTENAW COUNTY... 1 SE SALINE M 0.23 9 42.17N 83.77W STORM TOTAL SNOW REPORTS LOCATION SNOWFALL DURATION (INCHES) (HOURS) LAT LON ...GENESEE COUNTY... 4 WNW FLINT M 2.5 4.5 43.04N 83.77W SE FLINT M 2.9 6 43.02N 83.69W FLUSHING M 3.0 4.5 43.06N 83.84W ...LIVINGSTON COUNTY... HOWELL M 1.7 6 42.61N 83.94W ...MACOMB COUNTY... EASTPOINTE M 2.5 7.5 42.47N 82.96W CHESTERFIELD TOWNSHIP M 3.0 7.5 42.68N 82.82W ...MONROE COUNTY... MONROE M 1.0 7.0 41.92N 83.39W ...OAKLAND COUNTY... 4 SW CLARKSTON M 1.7 6 42.69N 83.47W FARMINGTON HILLS M 1.8 4.0 42.49N 83.38W 1 E CLARKSTON M 2.1 7.5 42.74N 83.40W ROCHESTER HILLS M 2.1 7.5 42.67N 83.16W BERKLEY M 2.5 5 42.50N 83.19W 5 E OXFORD M 2.7 6 42.82N 83.15W ...SAGINAW COUNTY... 3 NW SAGINAW M 2.1 6.5 43.45N 83.99W 5 S MERRILL M 2.3 9.5 43.34N 84.34W 5 W SAGINAW M 2.3 4.5 43.42N 84.05W 4 WSW CHESANING M 2.5 9 43.17N 84.21W HEMLOCK M 2.5 6.5 43.42N 84.23W ...SANILAC COUNTY... 2 W PECK M 3.2 5.5 43.26N 82.86W ...ST. CLAIR COUNTY... ALGONAC M 2.0 8 42.62N 82.53W FORT GRATIOT M 2.5 8 43.01N 82.43W ...WASHTENAW COUNTY... 2 NE ANN ARBOR M 1.9 3.0 42.29N 83.71W ...WAYNE COUNTY... BROWNSTOWN TOWNSHIP M 1.5 8 42.15N 83.26W SW ROMULUS M 1.9 6 42.22N 83.37W GARDEN CITY M 2.0 8 42.33N 83.33W NORTHVILLE M 2.5 3.0 42.44N 83.49W M = MEASURED E = ESTIMATED $$




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