It's possible that it could be right tonight for the wrong reasons. We have fresh snow, clear skies and light winds tonight so it could verify pretty close.
HRR 2m temps have been about 3 to 5 degrees too cold with this air mass. I've been seeing a lot of posts on Wx Twitter about how the HRRR de-couples the atmosphere too quickly and has a cold bias with 2m temps.
Yup. As I mentioned earlier, it's low topped stuff that appears to fade out in between radar sites. Someone needs to tell that to Crankwxguy on Twitter.
KGAI just reported SN+
You mean this event? https://www.washingtonpost.com/news/capital-weather-gang/wp/2015/02/14/d-c-area-forecast-snow-squalls-this-evening-ahead-of-dangerous-wind-chills-tonight-into-sunday/?utm_term=.de7999ab50cc
If you load the spectrum width on LWX radar, you can see the goods are crossing into Frederick County right about now. Seems like the real business is about 5-10 min after the light snow starts.