National Weather Service United States Department of Commerce

On August 8, 2015 a slow moving cold front tracked across northern Minnesota and interacted with an unstable air mass and the remnants of an out-flow boundary to produce scattered showers and thunderstorms over the Northland. A number of these storms became strong to severe with large hail and heavy rain the main impacts. Here is a summary of this event.

Radar Loop of Event

 
Regional Visible Satellite Loop
 
Mesoanalysis 

 

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DULUTH MN
1033 PM CDT SAT AUG 08 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0604 AM     HAIL             7 WSW PINE RIVER        46.69N 94.54W 
08/08/2015  E0.25 INCH       CASS               MN   PUBLIC          

0650 AM     HAIL             MERRIFIELD              46.47N 94.17W 
08/08/2015  E0.25 INCH       CROW WING          MN   PUBLIC          

            PEA SIZE HAIL AND A COUPLE OF SMALL TREES DOWN.

0711 AM     HAIL             IRONTON                 46.48N 94.00W 
08/08/2015  E0.25 INCH       CROW WING          MN   TRAINED SPOTTER 

            SPORADIC PEA SIZE HAIL. PEAK GUST 32 MPH.

0714 AM     HAIL             3 SSW CUYUNA COUNTRY ST 46.45N 94.01W 
08/08/2015  E0.25 INCH       CROW WING          MN   TRAINED SPOTTER 

0715 AM     HAIL             2 ESE CUYUNA COUNTRY ST 46.48N 93.96W 
08/08/2015  E0.50 INCH       CROW WING          MN   TRAINED SPOTTER 

            PEA TO MARBLE SIZE HAIL.

0716 AM     HAIL             4 SSW CUYUNA COUNTRY ST 46.43N 94.02W 
08/08/2015  E0.25 INCH       CROW WING          MN   TRAINED SPOTTER 

0716 AM     HAIL             3 SSW CUYUNA COUNTRY ST 46.45N 94.01W 
08/08/2015  E0.50 INCH       CROW WING          MN   TRAINED SPOTTER 

0718 AM     HAIL             2 SE RIVERTON           46.43N 94.02W 
08/08/2015  E0.25 INCH       CROW WING          MN   PUBLIC          

            REPORTED VIA MPING.

0733 AM     HAIL             5 ESE CUYUNA COUNTRY ST 46.46N 93.90W 
08/08/2015  E0.75 INCH       CROW WING          MN   TRAINED SPOTTER 

            DIME SIZE HAIL REPORTED.

0900 AM     FLOOD            2 WSW LONGVILLE         46.98N 94.25W 
08/08/2015                   CASS               MN   TRAINED SPOTTER 

            SPOTTER HAD BASEMENT FLOODING. 1 INCH OF WATER IN 800 
            SQUARE FOOT BASEMENT. SPOTTER APPROXIMATES 5 INCHES OF 
            TOTAL RAINFALL...AND ESTIMATES THE TIME ON WHEN FLOODING 
            STARTED.

0153 PM     HEAVY RAIN       6 ENE HACKENSACK        46.96N 94.41W 
08/08/2015  M2.07 INCH       CASS               MN   TRAINED SPOTTER 

            TOTAL FOR TODAY. 0.23 INCHES FELL THIS MORNING.

0202 PM     HAIL             2 WSW LONGVILLE         46.98N 94.25W 
08/08/2015  E0.25 INCH       CASS               MN   TRAINED SPOTTER 

0250 PM     HAIL             4 N DEER RIVER          47.39N 93.79W 
08/08/2015  E0.25 INCH       ITASCA             MN   TRAINED SPOTTER 

            SMALL BRANCHES DOWN.

0303 PM     HAIL             3 NE MOOSE LAKE         47.43N 93.64W 
08/08/2015  M0.75 INCH       ITASCA             MN   TRAINED SPOTTER 

            SPOTTER REPORTS PENNY SIZED HAIL AS THE LARGEST. DURATION
            OF HAIL WAS LESS THAN TEN MINUTES. MOST OF THE HAIL WAS 
            PEA SIZED. 

0426 PM     HAIL             3 W MCGREGOR            46.61N 93.37W 
08/08/2015  M0.25 INCH       AITKIN             MN   TRAINED SPOTTER 

0430 PM     HAIL             4 W MAKINEN             47.36N 92.45W 
08/08/2015  E1.50 INCH       ST. LOUIS          MN   TRAINED SPOTTER 

            A FEW TREES DOWN. HEAVY RAIN.

0430 PM     HAIL             7 E ELY                 47.91N 91.70W 
08/08/2015  M0.88 INCH       LAKE               MN   TRAINED SPOTTER 

0434 PM     HAIL             1 E MAKINEN             47.36N 92.35W 
08/08/2015  M1.00 INCH       ST. LOUIS          MN   TRAINED SPOTTER 

            LOTS OF 1 INCH HAIL.

0435 PM     HAIL             4 NW BARNUM             46.54N 92.74W 
08/08/2015  M0.25 INCH       CARLTON            MN   TRAINED SPOTTER 

            SPOTTER ALSO REPORTS 1 INCH OF RAINFALL AS THE STORM 
            PASSED THROUGH. 

0438 PM     HAIL             ELY                     47.91N 91.85W 
08/08/2015  M1.00 INCH       ST. LOUIS          MN   TRAINED SPOTTER 

            MOSTLY PEA SIZED HAIL WITH SOME QUARTER SIZED HAIL.

0440 PM     HAIL             1 SW ELY                47.90N 91.86W 
08/08/2015  M0.25 INCH       ST. LOUIS          MN   TRAINED SPOTTER 

            WATER ON ROADWAYS WITHIN THE CITY OF ELY.

0442 PM     HAIL             5 NNW BARNUM            46.57N 92.74W 
08/08/2015  E0.25 INCH       CARLTON            MN   PUBLIC          

            REPORT RELAYED VIA MPING.

0445 PM     FLASH FLOOD      ELY                     47.91N 91.85W 
08/08/2015                   ST. LOUIS          MN   TRAINED SPOTTER 

            SPOTTER REPORTS 4 TO 5 INCHES OF WATER AT SOME 
            INTERSECTIONS IN WESTERN PORTIONS OF ELY. AT INTERSECTION
            OF CAMP STREET AND CENTRAL AVENUE...SPOTTER REPORTS 
            MANHOLE COVER LIFTED BY WATER. STILL RAINING AT THE TIME 
            OF THE REPORT.

0520 PM     TSTM WND DMG     KETTLE RIVER            46.49N 92.88W 
08/08/2015                   CARLTON            MN   PUBLIC          

            TREES DOWN.

0520 PM     HAIL             KETTLE RIVER            46.49N 92.88W 
08/08/2015  E1.75 INCH       CARLTON            MN   PUBLIC          

0549 PM     HAIL             BARNUM                  46.50N 92.69W 
08/08/2015  M0.50 INCH       CARLTON            MN   NWS EMPLOYEE    

            LOTS OF HAIL WITH THE LARGEST STONES BEING 0.5 
            INCHES...AND A DURATION OF 6 MINUTES. ESTIMATED WIND 
            GUSTS OF 30-35 MPH. 

0706 PM     HAIL             5 NW LONG ISLAND LAKE   48.07N 90.83W 
08/08/2015  E0.50 INCH       COOK               MN   PUBLIC          

            SMALL BRANCHES WERE BROKEN AND CANOES WERE BLOWN OFF 
            RACKS.

0725 PM     HAIL             1 SE LOON LAKE          48.06N 90.67W 
08/08/2015  M0.25 INCH       COOK               MN   TRAINED SPOTTER 

            SPOTTER REPORTS SOME PEA SIZED HAIL.

0725 PM     HAIL             2 S GUNFLINT LAKE       48.07N 90.70W 
08/08/2015  M0.75 INCH       COOK               MN   TRAINED SPOTTER 

            LARGEST HAIL WAS DIME SIZED. REPORT OF 1 INCH OF RAINFALL
            IN FEW MINUTES. 

0740 PM     HAIL             4 SSW ROSIE LAKE        48.04N 90.48W 
08/08/2015  M0.75 INCH       COOK               MN   PUBLIC          

            LOTS OF HAIL...WITH THE LARGEST BEING PENNY SIZED. 10 
            MINUTE DURATION. 

0741 PM     HAIL             4 SSE NORTH LAKE        48.06N 90.53W 
08/08/2015  E0.75 INCH       COOK               MN   TRAINED SPOTTER 


&&

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Damage photos from around Moilan Lake, MN       Location of Moilan Lake