Severe thunderstorms developed ahead of a strong cold front during the morning hours of September 19th. These storms moved to the northeast and caused heavy downpours, large hail and some damaging winds. Most of the severe weather occurred in a narrow swath from Yellow Medicine County in southwest Minnesota, then to Hutchinson in Mc Leod County and then northeast to Isanti and Chisago Counties where the storms weakened as they crossed into Wisconsin. The heaviest rainfall associated with these storms was in Sherburne County with one CoCoRaHS report north of Big Lake of 3.16 inches, with 2.98 inches falling in 45 minutes. Another report near Zimmerman in Sherburne County was 2.74 inches. In general the rain was welcomed in areas with a parched landscape, although there was some street flooding reported in downtown Monticello.
There was an injury reported in Hutchinson when a large tree fell on a vehicle. Other trees were reported down in the Blaine Area. Some large hail was reported as well. Hail the size of hen's eggs fell 2 miles south of Cambridge.
Listed below are storm reports from the National Weather Service.
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1106 AM CDT FRI SEP 20 2013 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0820 AM TSTM WND GST HANLEY FALLS 44.69N 95.62W 09/19/2013 M56.00 MPH YELLOW MEDICINE MN MESONET WIND GUST OF 56 MPH REPORTED AT 820 AND 825 AM AT SENSOR ALONG HWY 23 AT MILE MARKER 94. 0833 AM TSTM WND GST GRANITE FALLS 44.81N 95.54W 09/19/2013 M58.00 MPH CHIPPEWA MN AWOS MEASURED AT GRANITE FALLS AIRPORT 0840 AM TSTM WND DMG SACRED HEART 44.78N 95.35W 09/19/2013 RENVILLE MN PUBLIC POWER LINE DOWN, NUMEROUS LARGE BRANCHES DOWN ALL OVER TOWN. ESTIMATED TIME OF EVENT 0850 AM TSTM WND GST REDWOOD FALLS 44.54N 95.11W 09/19/2013 M47.00 MPH REDWOOD MN ASOS 0853 AM TSTM WND GST OLIVIA 44.78N 95.00W 09/19/2013 M48.00 MPH RENVILLE MN AWOS 0854 AM TSTM WND GST 3 E RENVILLE 44.79N 95.16W 09/19/2013 M77.00 MPH RENVILLE MN MESONET MEASURED AT KMNRENV12 0910 AM HAIL 6 SW MAPLE LAKE 45.17N 94.09W 09/19/2013 E1.75 INCH WRIGHT MN TRAINED SPOTTER NEAR GRANITE LAKE, TIME ESTIMATED BY RADAR 0929 AM TSTM WND GST HUTCHINSON 44.89N 94.37W 09/19/2013 M46.00 MPH MCLEOD MN AWOS 0937 AM HAIL 4 SSE LAKE MARIA STATE 45.26N 93.91W 09/19/2013 E0.75 INCH WRIGHT MN TRAINED SPOTTER 0940 AM HAIL MAPLE LAKE 45.23N 94.00W 09/19/2013 E1.75 INCH WRIGHT MN LAW ENFORCEMENT 0940 AM TSTM WND DMG HUTCHINSON 44.89N 94.37W 09/19/2013 MCLEOD MN EMERGENCY MNGR *** 1 INJ *** LARGE TREE FELL ON A VEHICLE TRAVELING ON JEFFERSON ST. ONE PERSON WITH MINOR INJURIES. 0944 AM TSTM WND DMG 2 S WAVERLY 45.04N 93.97W 09/19/2013 WRIGHT MN TRAINED SPOTTER TREE LIMBS BLOCKING SB WRIGHT CR8 0945 AM TSTM WND DMG 3 NW SILVER LAKE 44.94N 94.25W 09/19/2013 MCLEOD MN TRAINED SPOTTER SEVERAL LARGE TREE LIMBS DOWN IN SILVER LAKE...WITH SOME CORN FIELDS FLATTENED BY STRONG WINDS OUTSIDE OF TOWN. 0951 AM HAIL 4 SSE LAKE MARIA STATE 45.26N 93.91W 09/19/2013 E1.00 INCH WRIGHT MN TRAINED SPOTTER 1000 AM HAIL 1 SE MONTICELLO 45.29N 93.79W 09/19/2013 E1.00 INCH WRIGHT MN AMATEUR RADIO I-94 AND WRIGHT CTY HWY 118 1000 AM HAIL BIG LAKE 45.34N 93.75W 09/19/2013 E0.75 INCH SHERBURNE MN PUBLIC RELAYED BY DLH 1002 AM HAIL 1 W BIG LAKE 45.34N 93.77W 09/19/2013 E1.50 INCH SHERBURNE MN AMATEUR RADIO 1010 AM HAIL 2 N ELK RIVER 45.36N 93.57W 09/19/2013 E1.25 INCH SHERBURNE MN AMATEUR RADIO 1026 AM TSTM WND GST CRYSTAL 45.04N 93.36W 09/19/2013 M46.00 MPH HENNEPIN MN ASOS REPORTED BY ASOS AT CRYSTAL AIRPORT 1030 AM TSTM WND DMG 4 N DOWNTOWN MINNEAPOLI 45.03N 93.27W 09/19/2013 HENNEPIN MN LAW ENFORCEMENT METRO TRANSIT BUS OPERATOR REPORTED LARGE TREE ON CAR AT INTERSECTION OF 37TH AVE NE AND 2 1/2 ST. NE IN NORTHEAST MINNEAPOLIS. TIME ESTIMATED. 1030 AM HEAVY RAIN MONTICELLO 45.30N 93.80W 09/19/2013 U0.00 INCH WRIGHT MN AMATEUR RADIO STREET FLOODING IN DOWNTOWN MONTICELLO - ROADS CLOSED HWY 25 AND BROAD ST 1039 AM HAIL 1 W ST FRANCIS 45.38N 93.38W 09/19/2013 E0.88 INCH ANOKA MN AMATEUR RADIO 1040 AM TSTM WND DMG 4 ENE BLAINE 45.20N 93.14W 09/19/2013 ANOKA MN LAW ENFORCEMENT FEW TREES DOWN,INCL JUST SOUTH OF 125TH AVE NE AND SUNSET AVE, ON THE BLAINE-LINO LAKES BORDER. 1040 AM TSTM WND DMG 5 W ISANTI 45.49N 93.36W 09/19/2013 ISANTI MN LAW ENFORCEMENT TREES SCATTERED ACROSS SOUTH HALF OF ISANTI CO 1044 AM HAIL ISANTI 45.49N 93.25W 09/19/2013 E0.75 INCH ISANTI MN TRAINED SPOTTER DIME SIZED HAIL 1047 AM HEAVY RAIN 3 N CAMBRIDGE 45.61N 93.23W 09/19/2013 M2.07 INCH ISANTI MN COCORAHS 2.07 INCHES OF RAIN FELL IN 25 MINUTES. LOTS OF STANDING WATER IN LOWER PASTURES. 1050 AM HEAVY RAIN ZIMMERMAN 45.44N 93.59W 09/19/2013 M2.95 INCH SHERBURNE MN BROADCAST MEDIA 2.95 INCHES OF RAIN FELL BETWEEN 1009 AND 1049 AM. REPORTED BY WCCO WEATHER WATCHER. 1056 AM HAIL 2 S CAMBRIDGE 45.54N 93.23W 09/19/2013 E2.00 INCH ISANTI MN AMATEUR RADIO 1100 AM HEAVY RAIN 6 NNE BIG LAKE 45.42N 93.70W 09/19/2013 M2.98 INCH SHERBURNE MN COCORAHS MEASURED 2.98 INCHES OF RAIN IN 45 MINUTES. 1105 AM TSTM WND DMG 5 WSW RUSH CITY 45.65N 93.06W 09/19/2013 CHISAGO MN LAW ENFORCEMENT SCATTERED TREES DOWN ACROSS NORTHERN HALF OF COUNTY, INCL A TREE INTO A HOUSE WSW OF RUSH CITY 1130 AM HEAVY RAIN CAMBRIDGE 45.56N 93.23W 09/19/2013 E0.00 INCH ISANTI MN BROADCAST MEDIA STREET FLOODING REPORTED IN CAMBRIDGE. PHOTO SHOWS INTERSECTION FLOODED BY AT LEAST 1 FOOT OF WATER. TIME ESTIMATED. 0700 AM HEAVY RAIN 6 NNE BIG LAKE 45.42N 93.70W 09/20/2013 M3.16 INCH SHERBURNE MN COCORAHS 24 HOUR RAINFALL TOTAL 0700 AM HEAVY RAIN 5 ESE CAMBRIDGE 45.54N 93.13W 09/20/2013 M2.10 INCH ISANTI MN CO-OP OBSERVER 24 HOUR RAINFALL TOTAL 0700 AM HEAVY RAIN 8 NNE BIG LAKE 45.44N 93.68W 09/20/2013 M2.33 INCH SHERBURNE MN COCORAHS 24 HOUR PRECIP TOTAL 0700 AM HEAVY RAIN 1 NW ZIMMERMAN 45.45N 93.60W 09/20/2013 M2.74 INCH SHERBURNE MN COCORAHS DNR MNGAGE REPORT. 24 HOUR RAINFALL TOTAL.