Latest forecast
The large plume of hazardous wildfire smoke that moved through New York City on Wednesday drifted into the Mid-Atlantic Thursday, bringing dangerous air conditions to Philadelphia, Baltimore, and Washington, D.C.
By Thursday night, the thickest smoke will continue to spread over the Mid-Atlantic. AQI values may reach 400 in some areas. (Levels under 100 are generally considered safe.)
By Friday morning, the hazardous haze will be covering Pittsburgh and the Chesapeake Bay.
![PHOTO: Friday AM Tracking Smoke graphic](https://i.abcnewsfe.com/a/be9213d5-2b3f-46e3-8a77-14f178dff9b6/friday-am-weather-map-abc-jt-230608_1686252500426_hpEmbed_23x13.jpg)
The smoke may thin out during the day on Friday with cities like New York City seeing clearer conditions by Friday evening.
![PHOTO: Friday PM tracking smoke graphic](https://i.abcnewsfe.com/a/2cd16893-228a-47f0-a63b-927fc4f6f403/friday-pm-weather-graphic-abc-jt-230608_1686252576823_hpEmbed_9x5.jpg)
Major relief will move in by Monday when a cold front sweeps across the East, washing away much of the smoke in the air.
-ABC News' Daniel Amarante