August 17, 2009
Flood Advisory Issued for Duck Mountain, Porcupine Mountain Areas of Western Manitoba
Manitoba Water Stewardship’s Hydrologic Forecast Centre has issued a flood advisory for the Duck Mountain and Porcupine Mountain areas of western Manitoba as a result of heavy rains over the weekend.
Streams flowing off higher ground have risen rapidly after the heavy rainfall, overland flooding is occurring in low-lying areas and many smaller streams have overflowed their banks. Larger streams are still rising and most are expected to crest late today or tomorrow with minor over-bank flows in low-lying areas.
Last weekend’s storm system produced 75 to 100 millimetres (three to four inches) of rain over most of the region from Ethelbert north to Mafeking. As much as 150 mm (six in.) was reported at Hart Mountain in the Porcupine Hills. Most of the rain fell from late Saturday to Sunday with some additional rain this morning.
Flooding is unlikely on the Swan River since Saskatchewan portions of the watershed appear to have received significantly less rain. It is unlikely any communities in the area will be affected by river flooding.
The weekend storm also produced up to 65 mm (2.6 in.) of rain in the Whiteshell area and in northern Minnesota. While rivers in this region will rise significantly during the next few days, over-bank flows are not expected.
Additional information will be provided if there is a significant change in conditions or expectations.
The latest information on this flood advisory and other water levels is available at www.gov.mb.ca/waterstewardship/floodinfo/floodsheet.html.
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