AccuWeather: Hottest Day of the Year, So Far

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Adam Joseph with AccuWeather on Action News at 10 p.m., June 18, 2018 (WPVI)

The high in Philadelphia soared to 93 degrees today, just three degrees shy of our record high. But, the heat index made if feel like 97. Allentown tied a record high of 95 with a heat index above 100.
A cold front well to our north is triggering lots of severe weather across New England this afternoon. That front will be slowly sliding southward overnight, reaching our area near dawn. We could see a spotty thunderstorm this evening and overnight, mainly north, but not expecting any widespread activity as the timing of the day is not on our side.

HEAT ADVISORY: This is in effect in all counties away from the Shore from noon to 8 p.m. today, with a dangerous combination of heat and humidity. Cool drinks, a/c, shady breaks, light loose-fitting clothing will all be crucial. Senior citizens and young children are at special risk and should avoid the heat, remaining in the a/c. If a/c is not available, keeping fans on to circulate the air and drawing shades on the sunny side of the house will be important, along with lots of cool water and juice.

AIR QUALITY ALERT: A Code Orange Ozone Action Day is in effect with air pollution at levels that could compromise those of you in at risk groups like seniors, young children and people who suffer from asthma and heart and lung conditions. Limiting exposure and exertion between the hours of noon and 6 p.m. when the ground level ozone is at its worst is best. The rest of us can help by not filling the car between the hours of noon and 6 p.m. and holding off using gas-powered mowers between those hours, as well.

TONIGHT: A few very spotty showers and thunderstorms are possible overnight, mainly north and west. It's still muggy. The low is a very warm 77.

TUESDAY: With the front nearby during the morning, it will still be very warm and humid with lots of clouds around. As that front settles southward through the day we'll see a return of sunshine in the afternoon for northern areas with the biggest difference being a noticeable drop in dewpoints from near 70 at dawn to the upper 50s near sunset! We will have to keep an eye out along the frontal boundary to our south tomorrow for the possibility of a t'storm firing up, but this would be mainly from Dover on south. The high is also not as intense: 89.

WEDNESDAY: Look for partly sunny skies to start the day. Then, a wave of low pressure rides along the stalled front to the south, bringing some late day and overnight rain. The high drops to 82.

THURSDAY: Lingering morning showers give way to sunshine and dropping humidity. The high hits 84.

FRIDAY: Sun mixes with some clouds and we get a nice afternoon high around 80.

SATURDAY: Clouds give way to some sunny breaks. It's still relatively nice. Our high is 80.

SUNDAY: A stray morning shower is possible along with a thunderstorm with another shower or thunderstorm possible again in the afternoon. The high is 87.

MONDAY: Clouds mix with sun. It's humid with a high around 86.
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