Possible Frost and Freeze Warnings for Midwest Tonight.

Frost advisory has been issued for northwest Montgomery, eastern Loudoun, northwest Prince William and southern Fauquier counties from midnight until 8 a.m. while a freeze warning is in effect for north and west of those locations. Temperatures are expected to fall to mid-30s to lower 40s most spots, with some locations well north and west touching freezing. Cooler-than-average conditions are expected for the next few days, with morning sunshine giving way to some midday clouds and temperatures rising to near 60 for highs. Tree pollen is HIGH at 442.17 grains per cubic meter, but way down from last week, thanks to some rain.