National Weather Service United States Department of Commerce

Heavy rain possible for parts of the northern Rockies & Plains; Severe storms for the Upper Midwest

An unseasonably strong storm system in the northwest U.S. will bring showers and thunderstorms, some heavy, to parts of the northern Rockies and northern Plains through Saturday. Isolated flash floods will be possible in these areas. Some of the storms could be severe in parts of the Dakotas into Minnesota, with large hail and damaging winds.
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Last Update: 900 PM PDT FRI AUG 22 2014

View Nearby Observations

Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm

Marine Zone Forecast





  • SynopsisWINDS AND SHORT PERIODS SEAS WILL INCREASE TONIGHT AND THIS WEEKEND AS AN OFFSHORE HIGH PRESSURE SYSTEM STRENGTHENS AND INTERACTS WITH AN INLAND THERMAL TROUGH. SOUTHERLY WAVES WILL INCREASE SLIGHTLY THE NEXT FEW DAYS. WINDS AND SEAS WILL DIMINISH THE MIDDLE OF NEXT WEEK AS A LOW PRESSURE TROUGH MOVES NORTH OF THE WATERS.
  • Tonight N winds 10 to 20 kt. Around pt st george...gusts up to 30 kt. Waves NW 6 ft at 7 seconds. Patchy fog.
  • Sat NW winds 5 to 15 kt. Waves NW 5 ft at 8 seconds...and SW 2 ft at 16 seconds. Patchy fog.
  • Sat Night N winds 5 to 15 kt. Waves NW 5 ft at 9 seconds... And SW 2 ft at 16 seconds. Patchy fog.
  • Sun N winds 5 to 10 kt. Waves NW 6 ft at 9 seconds...and SW 2 ft at 15 seconds.
  • Sun Night NW winds 5 to 10 kt. Waves NW 6 ft at 9 seconds.
  • Mon N winds 5 to 10 kt. Waves NW 6 ft at 8 seconds...and W 3 ft at 15 seconds.
  • Tue N winds up to 5 kt. Waves NW 5 ft at 8 seconds.
  • Wed SW winds up to 5 kt. Waves NW 5 ft at 8 seconds...and SW 2 ft at 16 seconds.



Additional Forecasts and Information

Zone Area Forecast for Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm
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