National Weather Service United States Department of Commerce

Severe weather possible for parts of northern Plains and mid/upper Mississippi River Valley

Severe thunderstorms are expected across portions of the northern Plains and upper Mississippi Valley Wednesday. Large hail and damaging winds will be the main threats with these storms, but a tornado or two could occur as well. Other strong to severe storms may occur from late afternoon into the overnight hours from the middle Mississippi Valley into the lower Ohio Valley.
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Last Update: 900 PM PDT TUE AUG 19 2014

View Nearby Observations

Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...



  • SynopsisTHE GRADIENT HIGH PRESSURE OVER THE EASTERN PACIFIC AND A THERMAL TROUGH OVER THE INTERIOR WILL BRING INCREASED NORTHERLY WINDS AND BUILDING SHORT PERIOD SEAS DURING THE WEEK. A LONG PERIOD SOUTHWESTERLY SWELL WILL CONTINUE.
  • Tonight N winds 20 to 25 kt. Gusts up to 30 kt. Waves NW 8 ft at 9 seconds...and SW 2 ft at 15 seconds.
  • Wed N winds 20 to 25 kt. Gusts up to 30 kt. Waves N 9 ft at 8 seconds...and SW 2 ft at 15 seconds.
  • Wed Night N winds 20 to 25 kt. Gusts up to 30 kt. Waves NW 10 ft at 9 seconds...and SW 2 ft at 14 seconds.
  • Thu N winds 15 to 25 kt. Waves NW 9 ft at 8 seconds...and SW 2 ft at 16 seconds.
  • Thu Night N winds 15 to 20 kt. Waves NW 7 ft at 7 seconds.
  • Fri N winds 15 to 25 kt. Gusts up to 30 kt. Waves NW 9 ft at 8 seconds...and SW 2 ft at 20 seconds.
  • Sat N winds 10 to 20 kt. Waves NW 8 ft at 8 seconds...and SW 2 ft at 19 seconds.
  • Sun N winds 5 to 15 kt. Waves NW 7 ft at 8 seconds...and SW 2 ft at 17 seconds.



Additional Forecasts and Information

Zone Area Forecast for Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm
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