Saturday, May 07, 2011
Unsettled weather moving in Sunday night.. showers and thunderstorms with locally heavy rain possible
Today's scattered shower and thunderstorm activity over the Red River valley was a prelude to what looks to be an active period of weather coming up over southern Manitoba. A strong storm system is forecast to move into South Dakota late Sunday which will draw up a moist and unstable airmass northward. Shower and scattered thunderstorm activity is expected to develop over North Dakota and move into southern MB by late Sunday into Sunday night. Some of the rain could be heavy at times with amounts of 15-25 mm possible over portions of southern MB by Monday morning, including parts of the Red River valley. This system will be slow moving and will continue to generate showers and scattered thunderstorms over the northern plains and southern MB Tuesday into Wednesday. Of concern will be rainfall over this period, as river levels remain high across southern MB. Since much of this rainfall will be convective in nature, it will be difficult to pinpoint which areas will receive the heaviest rain and how much at this point.. but stay tuned as this situation develops.
Posted by rob at 6:37 PM