That yellow dust you’re seeing everywhere is mostly oak tree pollen. There are other tree pollens mixed in – red maple, eastern white pine, scarlet oak, white oak, northern red oak ...

The oak’s pollen flowers are in catkins and the ... with all the red oak group having some acorns hanging on trees during winter. White oaks will be bare of acorns during winters.

Spring allergies were worse this year due to heavy rainfall that caused a prolonged tree pollen season upstate.

Tree pollen counts have remained high the last few days in D.C., with beech, birch, oak, pine and sycamore being the predominate pollinating trees. RELATED: ACHOO! Here's the worst time of day for ...