Rainfall Estimates. Here is a rough estimate of how much rain fell overnight, based on MPX (Twin Cities) Doppler overlaid over GR3: an impressive swath of 2-5" from Elk River across the western suburbs into the Minneapolis area. The far southwestern suburbs experienced the most rain; over 4" estimated from Eden Prairie and Chanhassen to Lakeville, Shakopee and Prior Lake.
A Month's Worth Of Rain. Both Eden Prairie and Chanhassen are reporting 4.5" of rain from the MCS system that came through early this morning, about 5 week's worth of rain. Serious flash flooding was also reported in Shakopee and Prior Lake, with numerous roads closed. A complete list of storm damage from NOAA is here.
Diminishing Storms. NWS Doppler radar at 8:30 AM shows the back edge of the heaviest rain (and lightning) over the south metro, moving steadily east-southeast. Most areas in downtown Minneapolis and St. Paul, as well as close-in suburbs, should be dry by 8:30 AM or so. It will take longer for floodwaters to recede. Here is the latest Flash Flood Warning:
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
635 AM CDT SAT JUL 13 2013
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EASTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
SOUTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
WESTERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
WESTERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
* UNTIL 1030 AM CDT
* AT 633 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. TWO TO FOUR INCHES OF RAIN HAVE FALLEN IN THE PAST
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
PRAIRIE...LAKEVILLE...ST LOUIS PARK...LAKEVILLE...AND FARIBAULT.
SCOTT COUNTY DISPATCH REPORTED A STALLED CAR NEAR PRIOR LAKE.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS... OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING
STREAM... EVEN A SMALL ONE...ON FOOT OR IN A VEHICLE.