Excessive Heat Warning – today through Sunday: Heat index to reach 109°

I’m sure that you’ve heard we’re in for some big heat this weekend. An Excessive Heat Warning has been issued for noon today through Sunday night.

Temperatures are forecast to reach highs of 89° today, 96° on Saturday, and 91° on Sunday. The danger is increased by high humidity and the lack of wind. 

According to the National Weather Service, the Heat Index may reach 109° on Saturday and 107° on Sunday in Southborough.

[Editor’s Note: I’ll soon be sharing a post on ways you can enjoy staying cool the next few days.]

The agency warns:


* HEAT INDEX VALUES…From 90 to 100 today, and from 100 to 112 Saturday and Sunday. This will be due to temperatures in the 90s today and 96 to 102 Saturday and Sunday, and dewpoints in the low to mid 70s.

* TIMING…Noon today through Sunday evening, however the very worst of the heat will occur Saturday and Sunday.

* TEMPERATURE…Actual air temperatures will reach the upper 80s to lower 90s today, increasing to 96 to 102 degrees both Saturday and Sunday. It will not cool off much overnight, with lows in most areas only dropping to the mid 70s to near 80.

* IMPACTS…The heat and humidity may cause heat stress during outdoor exertion or extended exposure.

* LOCATION… Rhode Island, Northern Connecticut, and most of Massachusetts. This area does not include Cape Cod and the Islands.


Take extra precautions, if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.

Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

Below are some more details from NWS, click thumbnails to enlarge.

Friday 7-19-19 high temp map 

For updated forecasts, you can check NWS’ website here.

At this point, the Town doesn’t have plans to open a cooling center. If the situation changes to require it, they will let me know, and I will let you know.

*I looked up what Heat Index means. It’s an indicator of how uncomfortable it will feel between combined effects of temperature and humidity.

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