Lastly and most importantly, expect torrential rainfall causing significant flooding. I am upgrading my forecast rainfall for Cambridge to 6-10" Saturday through Sunday morning. The initial outer bands of rain look to arrive around midnight tonight and continue throughout Saturday into Sunday morning, ending by noon Sunday. Keep in mind, Cambridge's average monthly rainfall for August is 4.59". So we are talking potentially two months worth of rain during the course of a day and a half...there will be flooding!
11:51AM, 8/26 UPDATE: Hurricane Warning now in effect for Dorchester County.
Hurricane Irene Google Map Forecast Track
8:46AM, 8/26 EDIT: Tropical Storm Warning in effect for Eastern Shore of Maryland, except for Worcester County. Hurricane Warning in effect for Worcester County, the Eastern Shore of Virginia, and all of Delaware. Here is the current forecast by the National Weather Service out of Wakefield, VA:
Saturday: Tropical storm conditions expected. Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 79. East wind 16 to 21 mph increasing to between 29 and 34 mph. Winds could gust as high as 43 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Saturday Night: Tropical storm conditions expected. Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 73. Northeast wind 36 to 46 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between 3 and 4 inches possible.
Sunday: Tropical storm conditions possible. Scattered showers before noon. Partly sunny, with a high near 82. Chance of precipitation is 40%. New rainfall amounts between 1 and 2 inches possible.
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8/25 EDIT: Ruh-roh...this is looking like Bad News Bears from North Carolina to New England. For back home, the latest forecast track would give tropical storm forced winds (as of now, I estimate sustained winds 40-50 mph with gusts to 65 mph) Saturday night into Sunday morning, as well as heavy rain. The data I looked at last night would give Cambridge 5-8" of rain, with probably a foot of rain at Ocean City. Conditions should improve Sunday afternoon, but at what cost?