Courtesy: MNDNR State Climatology Office
Thunderstorms bring flooding rains over parts of Minnesota on July 12-13th, 2018.
A weak cold front spawned thunderstorms during the early morning hours Thursday, July 12, dumping up to seven inches of rain over Kanabec and southern Pine County, causing many roads to be flooded. One of the highest totals found so far was 7.84 inches in the town of Mora at the Kanabec Soil and Water Conservation District office. Five inches of rain fell over much of Kanabec, into Mille Lacs, southern Aitkin and southern Pine Counties. Mille Lacs Lake rose a half a foot in 24 hours.
Heavy rain also fell over northern St. Louis County, with Cook seeing 4.92 inches on July 12th.
Thunderstorms re-developed in the evening and dropped very heavy rains over the Twin Cities and southern Minnesota. Just over a half-inch (.51 inches) fell in 5 minutes at the Twin Cities International Airport. The total amount of rainfall was 2.17 inches through 1pm on July 13. Prior to the heavy rains, much of southern Minnesota was oppressively hot and humid. With a high of 95 degrees, the Twin Cities had a daily maximum at or above 90 degrees for the 13th time this summer. At 5pm, the Twin Cities International Airport recorded a temperature of 95 degrees and a dew point temperature of 76, creating a Heat Index of 108. This is the highest Heat Index of the summer so far at the Twin Cities.
Below are Storm Reports and Public Information Statements from the National Weather Service.
PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1204 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0800 AM FLASH FLOOD ONAMIA 46.07N 93.66W 07/12/2018 MILLE LACS MN EMERGENCY MNGR --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1230 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0909 AM FLASH FLOOD 11 NNW QUAMBA 46.05N 93.28W 07/12/2018 KANABEC MN EMERGENCY MNGR ONGOING WATER FLOWING OVER THE ROADS. --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 253 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0730 AM FLASH FLOOD GRASSTON 45.79N 93.15W 07/12/2018 KANABEC MN LAW ENFORCEMENT RAILROAD TRACK WASHED OUT IN GRASSTON MN. --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 309 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0220 PM FLOOD 10 N MORA 46.03N 93.28W 07/12/2018 KANABEC MN BROADCAST MEDIA A FEW INCHES OF WATER FLOWING OVER COUNTY HWY 3 NEAR INTERSECTION OF HWY 65, NORTH OF MORA (SOCIAL MEDIA VIDEO). ALSO, SHERIFF`S OFFICE REPORTS NEARLY ALL GRAVEL ROADS IN KANABEC COUNTY SUFFERED DAMAGE FROM FLOODING THIS MORNING; STILL BEING ASSESSED. --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DULUTH MN 341 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0526 AM LIGHTNING 2 W DULUTH 46.78N 92.16W 07/12/2018 ST. LOUIS MN NEWSPAPER IT IS BELIEVED LIGHTNING STRUCK A CHURCH IN THE PIEDMONT NEIGHBORHOOD OF DULUTH WHICH STARTED A FIRE IN THE ROOF, CAUSING DAMAGE TO THE ROOF AND CUPOLA. --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DULUTH MN 242 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0915 AM HEAVY RAIN 10 E PINE CITY 45.82N 92.77W 07/12/2018 M4.50 INCH PINE MN PUBLIC --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DULUTH MN 104 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1230 PM HEAVY RAIN 3 SW PINE RIVER 46.69N 94.44W 07/12/2018 E4.50 INCH CASS MN PUBLIC --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DULUTH MN 100 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1110 AM HEAVY RAIN 2 SW HINCKLEY 46.00N 92.96W 07/12/2018 E4.04 INCH PINE MN TRAINED SPOTTER --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 832 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0722 PM TSTM WND DMG RED WING 44.56N 92.54W 07/12/2018 GOODHUE MN LAW ENFORCEMENT MULTIPLE REPORTS OF TREES AND DAMAGE AND POWERLINES DOWN IN RED WING. TIME ESTIMATED FROM RADAR. --- PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 751 PM CDT THU JUL 12 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0530 PM TSTM WND DMG GAYLORD 44.56N 94.22W 07/12/2018 SIBLEY MN LAW ENFORCEMENT BRANCHES DOWN IN TOWN AND POWERLINE DAMAGE.