USNA Weather
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USNA Weather Forecast

Forecast Discussion:

A stationary front extends west-to-east from the leeward side of the Rocky Mountains to off the Delmarva coast.  Waves of low pressure will ride along that boundary over the next 48 hours, bringing periods of soaking rain to the Mid-Atlantic region.  On Friday, the unsettled weather will remain to our south, with a slight chance (25%) of afternoon and evening showers or storms. However, on Saturday a powerful area of low pressure will push across the Ohio River Valley, dumping 1-2” of rain across the Mid-Atlantic region, with higher totals (4"+) possible, particularly along the Mason Dixon Line and into Pennsylvania.  Some storms Saturday afternoon could become strong or severe with damaging winds, flooding rain, and intense lightning as the primary threats.  The last few weeks have been wet, so flooding is likely in low lying areas or under the more intense downpours.  The heaviest rain will likely arrive between 0800 and 1000 on Saturday, and may not depart until early Sunday morning. 

Five Day Forecast:

  • Friday: Seasonably mild with a mix of clouds and sun.  A slight chance for afternoon/evening showers or thunderstorms, particularly across Southern Maryland. Northeast wind 5-10 mph. High near 78 oF. Low near 66 oF.
  • Saturday: Mostly cloudy with periods of rain.  The rain will be heavy at times with localized flooding. Strong or severe thunderstorms are possible in the afternoon and evening.  East wind 10-15 mph, gusting to 25 mph. High: 70-74 oF. Low: 66-70 oF.
  • Sunday: A few lingering showers will give-way to gradual clearing by late morning. Northwest wind 10-15 mph, gusting to 25 mph. High: 78-82 oF. Low: 60-64 oF.
  • Monday: Sunny and pleasant. West wind 5-10. High: 78-82 oF. Low: 70-44 oF.
  • Tuesday: Mostly sunny with a slight chance for an afternoon or evening thunderstorm. South wind 10-15 mph. High: 84-88 oF. Low: 70-74 oF.

ISSUED: 26 June 2015 at 0900

NEXT FORECAST: 29 June 2015

FORECASTER: Meteorologist A.R. Davies

 Note: I will be on leave 01-06 July.  Please refer to the National Weather Service Baltimore/Washington for weather updates during that period: http://www.weather.gov/lwx/

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