The worst period of hazy, unhealthy air in New York City will last from Wednesday afternoon through Thursday morning, according to a New York Times analysis of computer forecast models.
The haze will likely vary in thickness through the overnight hours and could last through the day Thursday.
The Washington, D.C., region can expect dense smoke to arrive Wednesday night and last into the day Thursday.
Forecast models for smoke near the surface show that from Thursday night into Friday, the main swath of dense smoke could move further west, into western Pennsylvania and Ohio.
However, the further into the future you go, the less confident forecasters are in predicting the effects and density of the smoke.
Organizations:
New York Times, D.C
Locations:
New York, Washington, Pennsylvania, Ohio