Most Of Mass. Under Severe Thunderstorm Watch Boston Faces First Heat Wave Of Summer Blast Of Cold Air In Boston To Wipe Away Memorial Day WarmthSummer-Like Weather On Tap For WeekendWeather Warm-Up Brings Clouds And BreezeBoston Marathon Weather Forecast Looking Ideal For RunnersHeading Back To Spring Weather After Cold SnapHeavy Rain And Wintry Mix Impacts Morning CommuteOut Like A Lamb? Thursday Storm To Bring Sleet, Freezing Rain