Flash Flood Risk. NWS Doppler out of Grand Forks is estimating some 6-10" rainfall amounts over far southeastern North Dakota and northeastern South Dakota, 2-3 month's worth of rain overnight. These storms are weakening, but still capable of some 3-6" rainfall amounts from near Wheaton to Breckenridge and Wheaton. More from the NWS:
BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 817 AM CDT MON AUG 15 2011
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* FLASH FLOOD WARNING FOR... RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA... WILKIN COUNTY IN WEST CENTRAL MINNESOTA...
* UNTIL 800 PM CDT MONDAY
* AT 817 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. THE RADAR INDICATED 4 TO 6 INCHES OF RAINFALL HAD ALREADY FALLEN IN THE LIDGERWOOD AND HANKINSON AREAS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... WAHPETON...BRECKENRIDGE...HANKINSON...LIDGERWOOD...WYNDMERE... ABERCROMBIE AND BARNEY.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE INTO WATER OF UNKNOWN DEPTH. ONE OR TWO FEET OF WATER WILL FLOAT MOST CARS DOWNSTREAM.
Weakening Storms. NWS Doppler out of the Twin Cities at 11:23 am shows heavy showers and T-storms from Alexandria and Glenwood westward to Wheaton - drifting east/northeast - the bulk of the rain may stay just north of MSP early this afternoon.
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Snow falls north of the MSP metro area Sunday, but we're still on track for a couple inches of slush Monday. By the time the system really gets going, fueled with moisture from the Gulf of Mexico, it'll be too far east for heavy amounts here. Another coating of flakes Tuesday gives way to blue sky by midweek. Check the blog for more details. -Todd Nelson
A little snow and ice is possible this morning, but most of the significant snow on Sunday will fall over central and northern Minnesota. There's another chance of snow Monday, when an inch or two may fall on the metro, but this may wind up being more of a nuisance event for the immediate Twin Cities, but plowable over parts of central and northern Minnesota.
Admit it, 30s feel pretty good. Imagine what 50F or 60F will feel like. Today will feel more like late January, although blue sky and a higher sun angle will help to remove some of the sting. A clipper may spark a coating of snow Saturday, a warmer front dropping some accumulating snow on northern Minnesota Sunday. Monday's snow event looks less impressive, but a little slush is possible as we start the work week.
Yes, Wednesday was a salve for the senses - just what the doctor ordered. It was the first day above freezing in 18 days, so we can be forgiven for doing cartwheels (badly). Flurries mark the introduction of a cooler front today - you'll need a coat Friday, but another thaw arrives over the weekend before a (growing) chance of accumulating snow on Monday. Stay tuned.