The longest heat wave in Boston’s history occurred in 1912, with nine straight days of temperatures in the 90s. Perhaps, then, we should count ourselves lucky that this heat wave is only entering day five.
The heat will be almost inescapable today, with heat advisories and warnings in effect today statewide, except for the Cape and the Islands. Heavy humidity will shoot apparent temperatures up to 105 degrees in Southern Massachusetts, according to the National Weather Service.
Between 11 a.m. and 7 p.m. today a heat advisory and an excessive heat warning will be in effect, as apparent temperatures statewide will waver around 100 degrees. The excessive heat warning, which applies only to Southern Massachusetts, means apparent temperatures there could climb to around 105 degrees.
“We don’t often issue excessive heat advisories,†said meteorologist Kim Buttrick. “We will likely issue another one tomorrow.â€
Temperatures are likely to just pass 90 in Boston today, although a sea breeze later today could moderate temperatures into the high 80s. Today will see mostly sunny skies, with increasing cloud cover tonight. Tonight will see temperatures in the mid-70s and a 30 percent chance of precipitation in Boston, with showers and thunderstorms dissipating before 3 a.m.
Friday will see similar conditions statewide, as we likely enter day six of the heat wave. Heavy heat and humidity will again combine, likely spurring more heat advisories for Friday. Boston will likely see even hotter temperatures on Friday, according to the weather service.
“We are not expecting a sea breeze tomorrow, so Boston will see temperatures near 96,†Buttrick said. Winds could pick up later in the day and offer some relief from the heat, with gusts close to 20 miles per hour.
Saturday will likely see temperatures again rising into the 90s, although chances will improve for severe showers and thunderstorms after 5 p.m. Boston has a 60 percent chance of precipitation for Saturday evening. New rainfall amounts in Boston on Saturday will be about a quarter of an inch, according to the weather service.
Sunday through Wednesday will see seasonable temperatures in the low 80s, and diminishing humidity levels. Conditions should stay sunny and dry up until Wednesday, when chances of precipitation will elevate.
“Right now it looks like temperatures will remain seasonable throughout the week,†Buttrick said.
Jasper can be reached at jasper.craven@globe.com or on Twitter @Jasper_Craven
