Overview
An autumn-like low pressure system swept across the Great Lakes region on August 17th, 2017. A warm and muggy air mass accompanied this system across northern Michigan, aiding to the development of periods of rain (heavy at times) along with scattered thunderstorms.
An EF0 tornado briefly touched down near the north shore of George Lake, 3 miles southeast of Lupton, in Ogemaw County. Pictures relayed to NWS Gaylord provide evidence that the tornado began as a tornadic waterspout over the northern portion of the lake before moving ashore. Damage was focused on Maple Avenue along the north shore of George Lake, primarily impacting a few houses, an outbuilding and several docks/boats.
Tornadoes:
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			 Tornado - 3 mi. southeast of Lupton, MI 
 Track Map    
			
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph  | 
			EF1 Moderate 86-110 mph  | 
			EF2 Significant 111-135 mph  | 
			EF3 Severe 136-165 mph  | 
			EF4 Extreme 166-200 mph  | 
			EF5 Catastrophic 200+ mph  | 
		
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Storm Reports
The following are storm reports relayed to NWS Gaylord on August 17th, 2017.
0734 PM     TORNADO          3 SE LUPTON             44.40N 83.97W
08/17/2017                   OGEMAW             MI   NWS STORM SURVEY
            EF0 TORNADO ALONG MAPLE AVENUE ALONG THE NORTH SHORE OF
            GEORGE LAKE. MAXIMUM WIND SPEED 80 MPH. DAMAGE TO DOCKS,
            OUTBUILDINGS AND SIDING.
0732 PM     TSTM WND DMG     1 ENE RIFLE RIVER STATE 44.41N 83.97W
08/17/2017                   OGEMAW             MI   LAW ENFORCEMENT
            LAW ENFORCEMENT RELAYED REPORT OF DAMAGE TO
            2 HOUSES. TIME ESTIMATED FROM RADAR.
Rain Reports
Periods of briefly heavy rainfall fell across portions of northern Michigan in association with the area of low pressure moving across the Great Lakes. The following are rain reports of over 1.00 inch. Note: Sault Ste. Marie set a daily rainfall record for August 17th, 2017 by recording 2.83 inches of rain, breaking the old recoprd of 1.41 inches set in 2011.
..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..
0755 AM     HEAVY RAIN       1 S SAULT STE. MARIE    46.47N 84.37W
08/18/2017  M3.47 INCH       CHIPPEWA           MI   ASOS             
            ASOS STATION ANJ, SAULT STE MARIE. 
0800 AM     HEAVY RAIN       2 W SAULT STE. MARIE    46.49N 84.40W
08/18/2017  M2.82 INCH       CHIPPEWA           MI   CO-OP OBSERVER   
            CO-OP OBSERVER STATION SSMM4, SAULT STE 
            MARIE. 
0312 PM     HEAVY RAIN       3 S INDIAN RIVER        45.38N 84.63W
08/18/2017  M2.43 INCH       CHEBOYGAN          MI   MESONET          
            MESONET STATION INDM4, 2 S INDIAN RIVER. 
0700 AM     HEAVY RAIN       4 N MCCARRON            46.39N 84.27W
08/18/2017  M2.09 INCH       CHIPPEWA           MI   COCORAHS         
            COCORAHS STATION MI-CP-11, 4 N MCCARRON. 
0700 AM     HEAVY RAIN       3 E CEDARVILLE          45.99N 84.30W
08/18/2017  M2.03 INCH       MACKINAC           MI   COCORAHS         
            COCORAHS STATION MI-MC-3, CEDARVILLE 3.2 
            ESE. 
0304 PM     HEAVY RAIN       4 WSW RACO              46.36N 84.80W
08/18/2017  M1.99 INCH       CHIPPEWA           MI   MESONET          
            MESONET STATION RACM4, 4 W RACO. 
0525 PM     HEAVY RAIN       SAULT STE. MARIE        46.48N 84.37W
08/17/2017  M1.65 INCH       CHIPPEWA           MI   ASOS             
0800 AM     HEAVY RAIN       9 ESE GOETZVILLE        46.02N 83.92W
08/18/2017  M1.57 INCH       LSZ322             MI   CO-OP OBSERVER   
            CO-OP OBSERVER STATION DTVM4, DETOUR 
            VILLAGE. 
0754 AM     HEAVY RAIN       5 S CATHRO              45.08N 83.56W
08/18/2017  M1.57 INCH       ALPENA             MI   ASOS             
            ASOS STATION APN, PHELPS COLLINS FIELD. 
0700 PM     HEAVY RAIN       KELDEN                  46.21N 84.31W
08/17/2017  M1.49 INCH       CHIPPEWA           MI   PUBLIC           
0700 AM     HEAVY RAIN       1 SSE SAINT IGNACE      45.86N 84.72W
08/18/2017  M1.33 INCH       MACKINAC           MI   COCORAHS         
            COCORAHS STATION MI-MC-4, SAINT IGNACE. 
0700 PM     HEAVY RAIN       BOYNE CITY              45.19N 84.96W
08/17/2017  M1.27 INCH       CHARLEVOIX         MI   PUBLIC           
0800 AM     HEAVY RAIN       1 NNW CHEBOYGAN         45.65N 84.47W
08/18/2017  M1.26 INCH       CHEBOYGAN          MI   CO-OP OBSERVER   
            CO-OP OBSERVER STATION CHBM4, CHEBOYGAN. 
0800 AM     HEAVY RAIN       2 NNW EAST JORDAN       45.19N 85.15W
08/18/2017  M1.25 INCH       CHARLEVOIX         MI   COCORAHS         
            COCORAHS STATION MI-CX-7, 2 NNW EAST JORDAN. 
0800 AM     HEAVY RAIN       2 NNW EAST JORDAN       45.19N 85.15W
08/18/2017  M1.25 INCH       CHARLEVOIX         MI   CO-OP OBSERVER   
            CO-OP OBSERVER STATION EJNM4, 2 NNW EAST 
            JORDAN.
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