Cherry blossoms with a cloudy sky on Wednesday, March 30, 2011.

The Eastern U.S. is locked into a colder than average regime, and cherry blossom prognosticators are taking notice.  The National Park Service has revised its date for the blossoms’ peak bloom from March 26-30 to April 3-6.

The change comes several days after we issued our cherry blossom peak bloom forecast of April 3-7 (centered on April 5).

The date of the cherry blossom’s peak is closely correlated to March temperatures.  March has been colder than average thus far, and chilly weather is expected for the rest of the month.

The National Weather Service’s 8-14 day outlook calls for a fairly high likelihood of below average temperatures in the Mid-Atlantic

DC blooms: Where to find cherry blossoms in your neighborhood.