Family at Stockbridge Bowl beating heat

Matt Szwyd lets his dog, Rogue, swim toward  his daughter, Scout, 3. The family was cooling off Tuesday at the Stockbridge Bowl. The presence of a "heat dome" over the Western Atlantic Ocean will keep temperatures up in the region at least until late Wednesday. 

Relief from the blistering heat and tropical humidity blanketing the Berkshires is in sight, but not until Thursday, when a noticeable cool-down begins.

A “heat dome” positioned over the Western Atlantic Ocean between Bermuda and the Carolinas continues to cause misery in the Northeast and mid-Atlantic states, especially for residents lacking air-conditioning.

The National Weather Service issued another heat advisory, this one for South Berkshire, in effect on Wednesday from 11 a.m. to 8 p.m. North Berkshire will be slightly less steamy, according to government forecasters.

Monday’s high of 90 at Pittsfield Municipal Airport, set in the late afternoon, tied the record for June 28 set in 1966.

Tuesday’s heat again peaked at 90, one degree short of the June 29 record of 91 recorded in 1944, before scattered showers and thunderstorms brought limited relief to parts of the county.

Several cooling centers have opened in the Berkshires:

Pittsfield: Christian Center, 193 Robbins Ave., 9 a.m. to 7 p.m. Wednesday; Salvation Army, 298 West St., 10 a.m. to 1 p.m. Wednesday; Senior Center, 330 North St., 10 a.m. to 4 p.m. Wednesday.

Adams, Visitors Center, 3 Hoosac St., with extended days and hours to be decided.

North Adams: Visitors are welcome at the air-conditioned public library, 74 Church St.

Pittsfield Health Director Gina Armstrong urged extra caution for young children, elderly people and those who are ill or overweight because of greater heat-related illness risks.

A cooler air mass from Canada will begin a very slow approach to the region on Wednesday, but a temperature drop won’t be noticeable until Thursday, with highs only reaching 70. The chance of showers and thunderstorms persists into the holiday weekend.

By Independence Day and Monday, more sunshine will break through, with seasonable temperatures and still a lingering possibility of occasional showers.