Strong to severe thunderstorms developed across northeastern South Dakota during the afternoon of Sunday the 17th and as the storms moved into extreme western Minnesota they produced a tornado outside Wheaton along with widespread wind damage to trees and power lines. As they continued their march eastward the storms congealed into a Mesoscale Convective System (MCS) that continued to produce large hail and strong wind gusts into the early hours of Monday morning. The strongest wind gusts reported were 76 mph from Appleton along with a report from a storm chaser of 77 mph near Cosmos in Meeker County. Hail two inches and larger was reported in Le Sueur and Rice counties. Heavy rain was also an issue with these storms as amounts three inches and above fell in a swath from Kandiyohi to Goodhue counties. Some of these locations, such as Cannon Falls, once again experienced flash flooding just days after receiving substantial rains and flooding on the 14th.
Listed below are Public Information Statements from the National Weather Service offices in Aberdeen and Chanhassen.
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE ABERDEEN SD 101 PM CDT MON JUN 18 2012 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0652 PM TORNADO 11 NE WHEATON 45.92N 96.34W 06/17/2012 TRAVERSE MN TRAINED SPOTTER 0730 PM TSTM WND DMG 7 ENE GRACEVILLE 45.61N 96.30W 06/17/2012 TRAVERSE MN TRAINED SPOTTER 12 INCH DIAMETER TREE BLOWN DOWN. WINDS ESTIMATED OVER 60 MPH. 0750 PM TSTM WND DMG 2 NE BIG STONE CITY 45.32N 96.44W 06/17/2012 BIG STONE MN LAW ENFORCEMENT CRAMERS RESORT - POWER LINES DOWN... TREES DOWN... GARAGE DAMAGED 0800 PM TSTM WND DMG 8 E ORTONVILLE 45.30N 96.28W 06/17/2012 BIG STONE MN TRAINED SPOTTER 12 -15 POWER POLES SNAPPED PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 316 PM CDT MON JUN 18 2012 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0637 PM HAIL DAWSON 44.93N 96.05W 06/17/2012 M0.25 INCH LAC QUI PARLE MN AMATEUR RADIO 0646 PM FUNNEL CLOUD HOLLOWAY 45.25N 95.91W 06/17/2012 SWIFT MN LAW ENFORCEMENT 0649 PM FUNNEL CLOUD 3 NE DAWSON 44.96N 96.01W 06/17/2012 LAC QUI PARLE MN TRAINED SPOTTER FUNNEL HALFWAY TO THE GROUND. 0657 PM HAIL HANCOCK 45.50N 95.79W 06/17/2012 M1.00 INCH STEVENS MN LAW ENFORCEMENT ALSO HEAVY RAIN 0659 PM HAIL HANCOCK 45.50N 95.79W 06/17/2012 M1.75 INCH STEVENS MN TRAINED SPOTTER 0700 PM HAIL MILAN 45.11N 95.91W 06/17/2012 M1.00 INCH CHIPPEWA MN TRAINED SPOTTER 0700 PM HAIL HANCOCK 45.50N 95.79W 06/17/2012 M1.25 INCH STEVENS MN TRAINED SPOTTER HAIL LASTED 5 TO 7 MINUTES. 0724 PM HAIL 2 S STARBUCK 45.58N 95.53W 06/17/2012 M1.25 INCH POPE MN TRAINED SPOTTER 0727 PM HAIL 8 N MONTEVIDEO 45.07N 95.72W 06/17/2012 M1.75 INCH CHIPPEWA MN LAW ENFORCEMENT 0758 PM FUNNEL CLOUD 4 NW APPLETON 45.24N 96.08W 06/17/2012 SWIFT MN TRAINED SPOTTER FUNNEL HALF WAY TO THE GROUND. 0803 PM FUNNEL CLOUD 8 S KERKHOVEN 45.08N 95.32W 06/17/2012 CHIPPEWA MN TRAINED SPOTTER 0814 PM TSTM WND GST APPLETON 45.20N 96.02W 06/17/2012 M76.00 MPH SWIFT MN AWOS 0835 PM FUNNEL CLOUD 5 N PRIAM 45.14N 95.14W 06/17/2012 KANDIYOHI MN TRAINED SPOTTER 0835 PM TSTM WND DMG MILAN 45.11N 95.91W 06/17/2012 CHIPPEWA MN TRAINED SPOTTER POWER LINES DOWN. TIME ESTIMATED FROM RADAR. 0837 PM FUNNEL CLOUD GROVE LAKE 45.63N 95.20W 06/17/2012 POPE MN TRAINED SPOTTER 0838 PM TSTM WND DMG MADISON 45.01N 96.19W 06/17/2012 LAC QUI PARLE MN STORM CHASER LARGE PORTION OF ROOF RIPPED OFF BUILDING. TIME ESTIMATED FROM RADAR. 0900 PM TSTM WND DMG WILLMAR 45.12N 95.05W 06/17/2012 KANDIYOHI MN TRAINED SPOTTER LARGE TREE LIMBS DOWN. 0900 PM HAIL WILLMAR 45.12N 95.05W 06/17/2012 M1.00 INCH KANDIYOHI MN TRAINED SPOTTER 0908 PM TSTM WND DMG 5 NW ATWATER 45.19N 94.85W 06/17/2012 KANDIYOHI MN STORM CHASER ROOF BLOWN OFF BARN, LARGE TREES DOWNED, WINDOWS BLOWN OUT OF HOUSE AND POWER LINES SEVERED. 0913 PM TSTM WND GST PAYNESVILLE 45.38N 94.72W 06/17/2012 M63.00 MPH STEARNS MN AWOS 0915 PM TSTM WND DMG KANDIYOHI 45.13N 94.93W 06/17/2012 KANDIYOHI MN TRAINED SPOTTER SIX TO TEN INCH DIAMETER TREE BRANCHES DOWN AND POWER IS OUT OVER MUCH OF THE CITY. 0926 PM TSTM WND DMG ATWATER 45.14N 94.78W 06/17/2012 KANDIYOHI MN TRAINED SPOTTER THIRTY INCH DIAMETER TREE DOWNED. POWER OUT OVER MUCH OF THE CITY. 0930 PM FUNNEL CLOUD 5 NW SACRED HEART 44.83N 95.42W 06/17/2012 RENVILLE MN TRAINED SPOTTER 0935 PM TSTM WND DMG COSMOS 44.94N 94.70W 06/17/2012 MEEKER MN TRAINED SPOTTER LARGE TREES TOPPLED. TIME ESTIMATED FROM RADAR SIGNATURE. 0937 PM FUNNEL CLOUD SACRED HEART 44.78N 95.35W 06/17/2012 RENVILLE MN TRAINED SPOTTER FUNNEL HALF WAY DOWN TO THE GROUND. 0945 PM TSTM WND DMG 8 N GROVE CITY 45.27N 94.68W 06/17/2012 MEEKER MN LAW ENFORCEMENT TURKEY BARNS DOWN, ROOF TORN OFF OF A HOUSE. 0948 PM TSTM WND GST CLARA CITY 44.96N 95.37W 06/17/2012 M55.00 MPH CHIPPEWA MN MESONET 0956 PM TSTM WND GST COSMOS 44.94N 94.70W 06/17/2012 E77.00 MPH MEEKER MN STORM CHASER POWER POLES LEANING. 0957 PM TSTM WND DMG SILVER CREEK 45.31N 93.94W 06/17/2012 WRIGHT MN LAW ENFORCEMENT TREES TOPPLED. 1000 PM TSTM WND DMG STEWART 44.73N 94.49W 06/17/2012 MCLEOD MN LAW ENFORCEMENT POWER OUTAGE TO A FEW HOMES. 1011 PM TSTM WND DMG 2 E SACRED HEART 44.78N 95.31W 06/17/2012 RENVILLE MN TRAINED SPOTTER TRACTOR TRAILER BLOWN OVER ON HIGHWAY 212. 1011 PM FUNNEL CLOUD 1 E SACRED HEART 44.78N 95.33W 06/17/2012 RENVILLE MN TRAINED SPOTTER 1020 PM TSTM WND GST LESTER PRAIRIE 44.88N 94.04W 06/17/2012 M72.00 MPH MCLEOD MN MESONET 1025 PM TSTM WND DMG GLENCOE 44.77N 94.15W 06/17/2012 MCLEOD MN LAW ENFORCEMENT TWENTY TO TWENTY FIVE INCH DIAMETER TREES FELLED. 1030 PM TSTM WND DMG LESTER PRAIRIE 44.88N 94.04W 06/17/2012 MCLEOD MN LAW ENFORCEMENT TWENTY TO TWENTY FIVE INCH DIAMETER TREES TOPPLED. 1034 PM TSTM WND DMG 3 NW NEW GERMANY 44.91N 94.01W 06/17/2012 CARVER MN EMERGENCY MNGR TWO THREE FOOT DIAMETER TREES TORN FROM THE GROUND. RESIDENTS HEARD A LARGE ROAR BEFORE DAMAGED OCCURRED ON YALE AVE. DAMAGE TIME ESTIMATED FROM RADAR. 1034 PM TSTM WND DMG 2 NW NEW GERMANY 44.90N 94.00W 06/17/2012 CARVER MN EMERGENCY MNGR EMPTY GRAIN BIN PUSHED IN AND PARTIALLY REMOVED FROM FOUNDATION. DAMAGE OCCURRED ON YALE AVE. DAMAGE TIME ESTIMATED FROM RADAR. 1035 PM TSTM WND DMG 2 NE NEW GERMANY 44.90N 93.94W 06/17/2012 CARVER MN EMERGENCY MNGR FIVE SHEDS DAMAGED..WITH TWO DESTROYED. THREE CORN BINS DAMAGED...ONE TURNED OVER...ONE WRAPPED AROUND TREE...BOTH UNFILLED. PARTIALLY FILLED THIRD BIN DAMAGED BY ONE OF OTHER BINS. DAMAGE OCCURRED ON UPLAND AVE. TIME OF DAMAGE ESTIMATED BY RADAR SIGNATURE. 1035 PM TSTM WND DMG 2 NE NEW GERMANY 44.90N 93.94W 06/17/2012 CARVER MN EMERGENCY MNGR LOST PORTION OF SHED. TWO LARGE OAK TREES TOPPLED. DAMAGE OCCURRED ON UPLAND AVE. TIME ESTIMATED FROM RADAR. 1035 PM TSTM WND GST CAMBRIDGE 45.56N 93.23W 06/17/2012 M48.00 MPH ISANTI MN MESONET OCCURRED AT AIRPORT. 1036 PM TSTM WND DMG 3 NE NEW GERMANY 44.91N 93.93W 06/17/2012 CARVER MN EMERGENCY MNGR HOUSE LOST FIFTY PERCENT OF ITS ROOF. DAMAGE OCCURRED ON COUNTY ROAD 21. TIME ESTIMATED BY RADAR. 1036 PM TSTM WND DMG 3 NE NEW GERMANY 44.91N 93.93W 06/17/2012 CARVER MN EMERGENCY MNGR PART OF OLD BARN DAMAGED...PORTION OF SUPPORTING BLOCK WALL BLOWN OUT. MEDIUM TREES ALSO FELLED. DAMAGE OCCURRED ON COUNTY ROAD 21. DAMAGE TIME ESTIMATED FROM RADAR. 1040 PM TSTM WND DMG LESTER PRAIRIE 44.88N 94.04W 06/17/2012 MCLEOD MN LAW ENFORCEMENT POWER OUT THROUGH MUCH OF CITY. 1050 PM TSTM WND GST 2 NW RENVILLE 44.81N 95.24W 06/17/2012 M66.00 MPH RENVILLE MN TRAINED SPOTTER 1053 PM TSTM WND DMG LESTER PRAIRIE 44.88N 94.04W 06/17/2012 MCLEOD MN LAW ENFORCEMENT BRANCH SEVERED POWER LINE. 1058 PM TSTM WND DMG HUTCHINSON 44.89N 94.37W 06/17/2012 MCLEOD MN LAW ENFORCEMENT POWER OUTAGE IN SW PORTION OF CITY. 1105 PM TSTM WND GST WINTHROP 44.54N 94.36W 06/17/2012 M47.00 MPH SIBLEY MN MESONET 1110 PM TSTM WND GST WINTHROP 44.54N 94.36W 06/17/2012 M47.00 MPH SIBLEY MN MESONET 1111 PM TSTM WND GST BELLE PLAINE 44.62N 93.76W 06/17/2012 M54.00 MPH SCOTT MN MESONET 1120 PM TSTM WND GST 5 W NORTH ST PAUL 45.01N 93.10W 06/17/2012 E59.00 MPH RAMSEY MN TRAINED SPOTTER ESTIMATED WITH HAND HELD ANEMOMETER. 1120 PM FLASH FLOOD GLENCOE 44.77N 94.15W 06/17/2012 MCLEOD MN LAW ENFORCEMENT SEVERAL STREETS UNDERWATER. 1120 PM HAIL HECTOR 44.74N 94.71W 06/17/2012 M0.75 INCH RENVILLE MN TRAINED SPOTTER 1130 PM FLASH FLOOD 1 NW BISCAY 44.84N 94.29W 06/17/2012 MCLEOD MN DEPT OF HIGHWAYS HIGHWAY 22 BETWEEN CO RD 11 AND CO RD 67 JUST NORTHWEST OF BISCAY BLOCKED BY FLOODING. PUBLIC REPORT OF UP TO 5 FEET OF WATER ON ROADWAY. CORRECTED TIME OF EVENT. 1130 PM FLASH FLOOD 2 N BISCAY 44.86N 94.27W 06/17/2012 MCLEOD MN LAW ENFORCEMENT LAW ENFORCEMENT SHUTTING DOWN HIGHWAY 22 JUST NORTH OF TOWN. 1130 PM HAIL 5 W STEWART 44.73N 94.59W 06/17/2012 M1.00 INCH RENVILLE MN FIRE DEPT/RESCUE REPORTED AT HWY 212 WEST OF STEWART. DISTANCE FROM STEWART ESTIMATED. TIME ESTIMATED. 1133 PM TSTM WND DMG BURNSVILLE 44.76N 93.28W 06/17/2012 DAKOTA MN PUBLIC ISOLATED POWER OUTAGE IN BURNSVILLE. 1134 PM TSTM WND GST SOUTH ST PAUL 44.89N 93.04W 06/17/2012 M48.00 MPH DAKOTA MN AWOS 1140 PM TSTM WND GST 9 S PRIOR LAKE 44.60N 93.43W 06/17/2012 M58.00 MPH SCOTT MN FIRE DEPT/RESCUE MEASURED BY ANEMOMETER AT INTERSECTION OF COUNTY ROAD 8 AND 27. 1140 PM FLASH FLOOD LE SUEUR 44.46N 93.91W 06/17/2012 LE SUEUR MN TRAINED SPOTTER UNDERPASS HAD APPROXIMATELY EIGHT PLUS INCHES OF STANDING WATER ON BRIDGE ST COMING OUT OF TOWN FROM HWY 169. 1144 PM HAIL 2 W STEWART 44.73N 94.53W 06/17/2012 M1.00 INCH RENVILLE MN TRAINED SPOTTER HAIL OCCURRED AT HWY 212. 1203 AM TSTM WND GST 1 W NEW MARKET 44.57N 93.37W 06/18/2012 E60.00 MPH SCOTT MN TRAINED SPOTTER ESTIMATED 60 MPH WIND GUST AT INTERSECTION OF COUNTY RD 2 AND 27. 1214 AM TSTM WND GST NW WASTEDO 44.41N 92.86W 06/18/2012 M50.00 MPH GOODHUE MN MESONET MNDOT ROAD SENSOR ON HWY 52 SOUTH OF CANNON FALLS AT MILE MARKER 90. 1215 AM FLASH FLOOD NORTHFIELD 44.45N 93.17W 06/18/2012 RICE MN LAW ENFORCEMENT CITY STREETS FLOODED 1235 AM TSTM WND GST 3 NE RED WING 44.61N 92.56W 06/18/2012 M46.00 MPH PIERCE WI AWOS MEASURED AT RED WING AIRPORT 1253 AM HAIL WACONIA 44.85N 93.79W 06/18/2012 M1.00 INCH CARVER MN TRAINED SPOTTER 1253 AM HAIL NEW PRAGUE 44.55N 93.57W 06/18/2012 M1.75 INCH SCOTT MN EMERGENCY MNGR 1255 AM HAIL 1 S NEW PRAGUE 44.53N 93.57W 06/18/2012 M2.00 INCH LE SUEUR MN TRAINED SPOTTER 0103 AM HAIL LONSDALE 44.48N 93.43W 06/18/2012 M1.00 INCH RICE MN AMATEUR RADIO 0106 AM HAIL LONSDALE 44.48N 93.43W 06/18/2012 M1.75 INCH RICE MN LAW ENFORCEMENT 0111 AM HAIL WEBSTER 44.53N 93.35W 06/18/2012 M1.75 INCH RICE MN TRAINED SPOTTER 0115 AM HAIL LONSDALE 44.48N 93.43W 06/18/2012 E2.50 INCH RICE MN PUBLIC 0117 AM HAIL NORTHFIELD 44.45N 93.17W 06/18/2012 M0.88 INCH RICE MN AMATEUR RADIO 0123 AM HAIL 5 SW NORTHFIELD 44.40N 93.24W 06/18/2012 M1.75 INCH RICE MN TRAINED SPOTTER REPORTED AT INTERSECTION OF HWY 3 AND CO RD 8 0126 AM HAIL DUNDAS 44.43N 93.20W 06/18/2012 M1.75 INCH RICE MN AMATEUR RADIO 0130 AM HAIL 4 E NERSTRAND 44.34N 92.98W 06/18/2012 M0.88 INCH GOODHUE MN COCORAHS MINOR LEAF DAMAGE 0230 AM FLASH FLOOD CANNON FALLS 44.52N 92.90W 06/18/2012 GOODHUE MN LAW ENFORCEMENT HWY 52 FLOODED NEAR CANNON FALLS. FLOODING ALSO REPORTED ELSEWHERE IN GOODHUE COUNTY...INCLUDING CO RD 1...CO RD 14 AND CO RD 18. 0530 AM HEAVY RAIN JORDAN 44.67N 93.63W 06/18/2012 M3.12 INCH SCOTT MN CO-OP OBSERVER 24 HOUR TOTAL 0600 AM HEAVY RAIN 2 N WILLMAR 45.15N 95.05W 06/18/2012 M3.43 INCH KANDIYOHI MN CO-OP OBSERVER 24 HOUR TOTAL. 0700 AM HEAVY RAIN 2 WNW GREEN ISLE 44.69N 94.04W 06/18/2012 M3.78 INCH SIBLEY MN COCORAHS 0700 AM HEAVY RAIN 7 N PENNOCK 45.25N 95.18W 06/18/2012 M3.01 INCH KANDIYOHI MN COCORAHS 0700 AM HEAVY RAIN 1 ESE WILLMAR 45.12N 95.03W 06/18/2012 M3.33 INCH KANDIYOHI MN COCORAHS 0700 AM HEAVY RAIN 2 SSW LAKEVILLE 44.65N 93.26W 06/18/2012 M3.06 INCH DAKOTA MN COCORAHS 0700 AM HEAVY RAIN 1 S HAMPTON 44.59N 93.00W 06/18/2012 M3.29 INCH DAKOTA MN COCORAHS MNGAGE NETWORK 0700 AM HEAVY RAIN CANNON FALLS 44.52N 92.90W 06/18/2012 M3.31 INCH GOODHUE MN CO-OP OBSERVER 0700 AM HEAVY RAIN 6 WNW SPICER 45.27N 95.05W 06/18/2012 M3.21 INCH KANDIYOHI MN COCORAHS 0730 AM HEAVY RAIN 3 NW WATSON 45.04N 95.84W 06/18/2012 M2.90 INCH CHIPPEWA MN TRAINED SPOTTER 0800 AM HEAVY RAIN HAMBURG 44.73N 93.96W 06/18/2012 M4.26 INCH CARVER MN CO-OP OBSERVER 24 HOUR TOTAL 0856 AM HEAVY RAIN 3 WSW MARYSTOWN 44.70N 93.59W 06/18/2012 M3.70 INCH SCOTT MN TRAINED SPOTTER 24 HOUR TOTAL 1024 AM HEAVY RAIN 2 N MANANNAH 45.34N 94.64W 06/18/2012 M2.20 INCH STEARNS MN TRAINED SPOTTER TWENTY FOUR HOUR PRECIPITATION.
By: Climatology Volunteer Nick Yates