DCA flirts with sleet for a couple hours early Tuesday morning. There's a very slight warm nose at 925 mb. It's nothing to worry about...storm could even be over by then
I believe they only run it here when there is a storm. Usually it's for fire. And we dont burn.
https://mag.ncep.noaa.gov/model-guidance-model-parameter.php?group=Model Guidance&model=FIREWX&area=CONUS-AK&ps=area#
So NCEP ran the 1.33km Nam over our area at 0z. It only goes to 36 and it's still snowing when it cuts off
ETA - the contour over DC and NW of there is 0.25" - 0.50". You can see the little stripe of 0.5"+ over Catoctins
nobody should ever say or post the words "42 Hour HRRR".
These super mesos run every hour and are meant for shorter term. I wouldn't sweat it too much right now other than what it might show overnight.
Rap/Ruc isn't exactly the greatest model at this point, but it does "beat" the HRRR sometimes close in. I wouldn't rely on it, but I think it's worth looking at