The forecasters are thinking there will be at least some rain during the Boston Marathon

The weather during the Boston Marathon has been all over the place. This year it’s been chilly the past six weeks, and finally spring-like conditions are predicted for Thursday and Friday. The 10-day temperature forecast shows a possible summer-like day Saturday, followed by a return to chilly air on Sunday. “The possible problem for the weekend and early next week is that colder air from the north will once again move south, and when that meets this warm air it’s going to create a fairly significant storm system,” says Dave Epstein of the Boston Globe. “Obviously this can all change, but multiple computer models are indicating the way the atmosphere will unfold over the next five days is conducive to a significant rain event sometime within 24 hours of the Marathon.” Runners should be ready just in case. The challenge for forecasters is exactly when this heavy rain moves in — during the Marathon or before or even after it. “We won’t know for several days just when the rain might begin and when the heaviest will move into Boston, but I think it’s a high enough probability there will be at least some rain during Monday that runners and spectators should be thinking about it,” says Dave. “The worst-case scenario is a strong gusty wind with heavy rain during part of the Marathon. The best case is that it’s just cloudy with a few light showers; I think it’s highly unlikely we are going to have a sunny, pleasant day,” says Dave.

posted Monday April 9th