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Is Canada behind the orange-like haze above the DC region?

Noticing an orange-like smoky haze in the skies above D.C. area? Blame Canada.

Western wildfires roughly 2,500 miles away in Alberta continue to seep smoke into the upper levels of the atmosphere, which then travel the jet stream east toward the D.C. region.

While the smoke affects the appearance of the sky, it is not expected to substantially impact air quality in the national capital region, according to 7News First Alert Meteorologist Brian van de Graaff.

“At this point, (the smoke) remains high enough above that it shouldn’t be an issue for us,” van de Graaff said, referring to Thursday and Friday.

He said the current air quality in the D.C. area is “green,” meaning good — with a forecast of good to moderate Thursday afternoon.

The situation could change if the smoke in the upper levels of the atmosphere is forced down to the surface. “On those days, that’s when you can actually smell the smoke. … It’s the particulate matter; that small, fine particles in the air that could be dangerous to those with respiratory ailments,” van de Graaff said.

There are 91 wildfires burning in Alberta, 27 of them are out of control, according to WTOP’s news partner, CBS News.



Forecast

THURSDAY: Mostly sunny. Winds blowing 5-10 mph. Highs near 70.

THURSDAY NIGHT: Mostly cloudy with low winds. Lows in the low to mid 50s.

FRIDAY: Morning clouds with afternoon sun. Winds in 5-10 mph. Highs in the low 70s.

SATURDAY: Partly to mostly cloudy; scattered light PM showers. Highs in the mid to high 70s.

Hot, humid week ahead for DC area with severe storm risk

A dangerous heat wave will grip the D.C. area through Thursday, with highs in the mid to upper 90s and heat index values between 100 and 105. Hot and humid conditions are expected through Thursday, according to the National Weather Service, which said to expect daily thunderstorm chances and a risk of severe thunderstorms. 7News Meteorologist Eileen Whelan told WTOP that most of Tuesday will stay dry, but a few late-day thunderstorms are possible, especially north and east of D.C. as storms drift south from Pennsylvania. Any storm could produce damaging wind gusts and hail, but Whelan reiterated "storm chances are low" on Tuesday. Due to a lack of air conditioning, Parkdale High School in Riverdale, Maryland, closed early at 10:30 a.m. on Tuesday, Prince George's County Public Schools said in a social media post.
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