Heavy Rains and Severe Storms: September 2, 2010

The wet summer of 2010 continues into September. A strong area of low pressure in North Dakota, along with a warm front lifting northward over southern Minnesota spawned severe thunderstorms that began in western Minnesota shortly after midnight on September 2, and moved across the state during the overnight hours. Many people woke up to the rumble of thunder in the wee hours of the morning.

A wide swath of central and southern Minnesota received from one half to an inch and a half of rain. There were also large hail and damaging winds reported. Hail the size of golf balls was reported west of Foley in Stearns County, and wind bent a rain road crossing arm at Olivia in Renville County. The heaviest rains were reported in Lincoln, Lyon and Redwood County. The heaviest rainfall reported so far was 5.2 inches in Arco and 4.8 inches at Ivanhoe in Lincoln County. Water covered a mile of Highway 16, 6 miles south of Hendricks in Lincoln County. The National Weather Service issued a flood warning for the Redwood River near Marshall in Lyon County. The predicted crest is 14.4 feet, four tenths of a foot above flood stage.

One interesting phenomena with this complex of thunderstorms were the strong winds associated with the dying thunderstorms as they moved to the east over the Duluth area. Wind gusts over 40 mph were reported in the Duluth-Superior area, with 52mph reported at the Duluth National Weather Service, and 58mph reported on the Blatnik bridge, south of downtown Duluth. These winds were associated with a wake low, which is a localized minimum in air pressure that can sometimes develop behind an area of thunderstorms that is weakening.

 

Radar-based precipitation estimate


National Weather Service Storm Summaries

  • September 2, 2010 heavy rainfall and severe weather  (National Weather Service Office - Sioux Falls)
  • Storm Reports courtesy the National Weather Service

    PRELIMINARY LOCAL STORM REPORT...SUMMARY
    NATIONAL WEATHER SERVICE SIOUX FALLS SD
    1126 AM CDT THU SEP 02 2010
    
    ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
    ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
                ..REMARKS..
    
    1017 PM     HAIL             17 S PUKWANA            43.53N 99.17W
    09/01/2010  E1.00 INCH       BRULE              SD   TRAINED SPOTTER
    
    0330 AM     FLASH FLOOD      MARSHALL                44.45N 95.79W
    09/02/2010                   LYON               MN   LAW ENFORCEMENT
    
                WATER OVER HIGHWAY 59 IN MARSHALL
    
    0335 AM     TSTM WND DMG     6 S HENDRICKS           44.42N 96.43W
    09/02/2010                   LINCOLN            MN   PUBLIC
    
                TREE BRANCHES 3 TO 4 INCHES IN DIAMETER BROKEN OFF. LOTS
                OF TREE DEBRIS IN YARD.
    
    0335 AM     HAIL             6 S HENDRICKS           44.42N 96.43W
    09/02/2010  E1.00 INCH       LINCOLN            MN   PUBLIC
    
                ALONG WITH 5 PLUS INCHES OF RAINFALL.
    
    0335 AM     FLASH FLOOD      6 S HENDRICKS           44.42N 96.43W
    09/02/2010                   LINCOLN            MN   PUBLIC
    
                VERY HEAVY RAINFALL OF MORE THAN 5 INCHES. WATER COVERING
                AREA ROADWAYS. HIGHWAY 16 HAS WATER OVER IT FOR A MILE IN
                EITHER DIRECTION.
    
    0345 AM     FLASH FLOOD      5 W HENDRICKS           44.50N 96.53W
    09/02/2010                   BROOKINGS          SD   CO-OP OBSERVER
    
                VERY HEAVY RAINFALL. MORE THAN 5 INCHES. DITCHES OVER
                FLOWING AND FLOWING HEAVILY INTO NEARBY OAK LAKE.
                SECONDARY ROADS ON THE WEST SIDE OF OAK LAKE ARE
                PARTIALLY WASHED OUT.
    
    0400 AM     FLASH FLOOD      WHITE                   44.43N 96.65W
    09/02/2010                   BROOKINGS          SD   EMERGENCY MNGR
    
                EM REPORTS FLOODING IN THE COUNTY.FLOODING REPORTED FROM
                BUSHNELL TO WHITE AND NORTH TO THE COUNTY LINE.. TOWNSHIP
                ROADS ALONG 6 MILE CREEK FROM WHITE NORTHWARD TO COUNTY
                LINE ARE UNDERWATER.
    
    0400 AM     HAIL             9 N SLAYTON             44.12N 95.79W
    09/02/2010  E0.88 INCH       MURRAY             MN   PUBLIC
    
                JUST A FEW STONES IN ADDITION TO MORE THAN 1.5 INCHES OF
                RAIN.
    
    
    PRELIMINARY LOCAL STORM REPORT
    NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
    330 AM CDT THU SEP 02 2010
    
    ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
    ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
                ..REMARKS..
    
    0100 AM     NON-TSTM WND DMG OLIVIA                  44.78N 95.00W
    09/02/2010                   RENVILLE           MN   LAW ENFORCEMENT
    
                NUMEROUS ROAD SIGNS BLOW DOWN.
    
    0105 AM     TSTM WND DMG     OLIVIA                  44.78N 95.00W
    09/02/2010                   RENVILLE           MN   TRAINED SPOTTER
    
                RAIL ROAD CROSSING ARM AT HWY 71 AND HWY 212...BENT IN
                HIGH WINDS.
    
    PRELIMINARY LOCAL STORM REPORT
    NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
    221 AM CDT THU SEP 02 2010
    
    ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
    ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
                ..REMARKS..
    
    0145 AM     HAIL             4 W FOLEY               45.66N 93.99W
    09/02/2010  M1.75 INCH       BENTON             MN   LAW ENFORCEMENT
    
                UP TO GOLF BALL SIZE HAIL REPORTED BY A DEPUTY WEST OF
                FOLEY.
    
    PRELIMINARY LOCAL STORM REPORT
    NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
    159 AM CDT THU SEP 02 2010
    
    ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
    ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
                ..REMARKS..
    
    0145 AM     TSTM WND GST     SARTELL                 45.62N 94.21W
    09/02/2010  M62 MPH          STEARNS            MN   TRAINED SPOTTER
    
    PRELIMINARY LOCAL STORM REPORT
    NATIONAL WEATHER SERVICE DULUTH MN
    931 AM CDT THU SEP 02 2010
    
    ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
    ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
                ..REMARKS..
    
    0610 AM     NON-TSTM WND GST 6 NW DULUTH             46.84N 92.21W
    09/02/2010  M52.00 MPH       ST. LOUIS          MN   ASOS
    
                MEASURED AT DULUTH INTERNATIONAL AIRPORT ASOS /DLH/. PEAK
                WIND OF 45 KNOTS.
    
    0614 AM     NON-TSTM WND GST 2 NE SUPERIOR           46.72N 92.03W
    09/02/2010  M44.00 MPH       LSZ145             WI   AWOS
    
                GUSTS TO 38 KNOTS MEASURED AT SKY HARBOR AIRPORT /DYT/.
    
    0615 AM     NON-TSTM WND GST 2 SSE DULUTH            46.75N 92.10W
    09/02/2010  M58.00 MPH       LSZ145             MN   MESONET
    
                50 KNOT GUST MEASURED AT MINNESOTA DOT SITE ON BLATNIK
                BRIDGE / PIER 20.
    
    0618 AM     NON-TSTM WND GST 1 SSE DULUTH            46.77N 92.11W
    09/02/2010  M44.00 MPH       ST. LOUIS          MN   OTHER FEDERAL
    
                38.1 KNOT GUST MEASURED AT DULM5 GREAT LAKES MARINE /
                WATER LEVEL OBSERVATION SITE.
    
    0620 AM     NON-TSTM WND GST 3 SE DULUTH             46.75N 92.07W
    09/02/2010  M44.00 MPH       LSZ145             MN   PUBLIC
    
                MEASURED ON A PRIVATE WEATHER STATION ON PARK POINT.
    
    0802 AM     NON-TSTM WND GST DEVILS ISLAND           47.07N 90.73W
    09/02/2010  M43.00 MPH       ASHLAND            WI   C-MAN STATION
    
                37 KNOT PEAK WIND AT DEVILS ISLAND CMAN /DISW3/.
    
    
    &&
    
    WIND GUSTS OVER 40 MPH FROM THIS MORNING/S WAKE LOW EVENT. MANY OTHER
    30-40MPH GUSTS WERE RECORDED...PARTICULARLY IN THE TWIN PORTS AREA.
    WAKE LOWS ARE LOCALIZED MINIMA IN PRESSURE THAT SOMETIMES DEVELOP
    BEHIND WEAKENING AREAS OF THUNDERSTORMS...AS WAS THE CASE THIS
    MORNING. THE SHARPER CONTRAST IN PRESSURE OVER A SMALL AREA PRODUCES
    
    
    Last modified: December 14, 2015

     

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