Heat, air quality alerts issued for parts of coastal Maine

Modesto Morganelli
Giugno 19, 2018

Saturday, the index reached 100 degrees at Midway and 97 degrees at O'Hare - on Sunday the highs will be upwards of 102 degrees. The National Weather Service has issued heat advisories spanning portions of eastern Kansas to New England, with oppressive heat set to grip much of the nation's midsection through Monday late-afternoon/evening. Heat indices are expected to remain in the 90s even at night.

To the east, a heat advisory has also been issued on Monday for Berks, Lehigh, Northampton-Delaware, Philadelphia, Chester, Montgomery, Bucks, Tioga, Sullivan, Susquehanna, Wayne, Wyoming, Lackawanna, Luzerne and Pike counties. Heat advisories cover much of the Mississippi Valley, from northern Arkansas to Wisconsin and MI, as heat indicies top 105 for millions.

The heat-island effect is the warming effect of urban surfaces compared to more rural surroundings. There have been reports of over 3 inches per hour just south of Duluth, Minnesota. Storms will last through midnight for parts of the region.

"It's gonna be a scorcha!" the National Weather Service wrote on Facebook.

Also, a front will drop in from the north on Monday afternoon, potentially producing thunderstorms with gusty winds, hail and heavy rain.

Today's severe weather outlook.

The thunderstorms are expected to develop in northern and western parts of MA by this afternoon and sweep the southeastern part of the state through the evening.

A slight risk for severe weather exists across northeast Nebraska, northern Iowa and northern Wisconsin on Sunday.

A cluster of thunderstorms in the Gulf of Mexico has a 20 percent chance of gaining tropical cyclone characteristics over the next few days.

Rainfall totals through Thursday morning.

There is some computer guidance suggesting rainfall totals could be higher than what is now forecast. That brings some concern for flash flooding.

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