rjvanals

32 moderate snow 3/4 inch so far

This is good for rapid accumulation inside the beltway once it flips

Light snow 33, .25 new

Road is snow/sleet covered w 70/30 snow sleet

Have that to although it’s more a sleet/rimed snow mix for me in Potomac

Sleet/snow mix which is good for accumulation w temps just above freezing

Anyone else getting sleet?

Rimed almost a sleety snow but at least this accumulates

Rain/Snow mix at Trader Joe’s in Darnestown

If I was at Liberty rather than home I’d be pretty excited

In DC metro we want the precip orientation to become more West to East to get the cold here vs the South to North we have now.

Yeah snowpack was better before this rainstorm. Let’s hope the GFS is right

12z GFS is showing 4.5” for DC, I’ll take the under

Yeah I have a few mixing in as well but still well above freezing

Looks like white rain in Frederick based on traffic cams

Yeah it’s raining

When’s the temp drop actually going to happen?

Yeah was trying to warn people yesterday about the cold air getting delayed little by little each model run but everyone wanted to look at the pretty snow maps

Hope your right and I look silly in 12 hours

Snowquester we were under a warning and hadn’t had a warning level event in a while. This time we’re in a advisory w multiple snow events the past few weeks

This one is in trouble in all seriousness especially inside the beltway and I’m worried I won’t get much at my house based on what I’m seeing in the modeling

Thank god the NAMs were wrong and DCA won’t get below freezing until 4pm today. Checking traffic cams South Mtn Wash/Frederick County line at ~1000 ft still looks to be rain so we have a ways to go toward the metro areas

Bump

Here’s a good spot to track the temp drop up on Camp David at~1800ft https://www.weather.gov/wrh/timeseries?site=KRSP

As I was pointing out yesterday but others dismissed temps will be an issue as the models started showing the Arctic front slowing down and we’re now hoping the cold can chase the precip Model trends early this morning show Arctic front has slowed down considerably since yesterday and is not fcst to clear the northern half of the fcst area until after 18Z. Meanwhile, models trends and microwave imagery through the snowfall rate product show precip arriving sooner than previously expected. Microwave passes since 0220Z showed that snow has been falling in the mountains since that time and a more recent pass from 0800Z showed that snow, at least aloft, has made it to areas just west of I-81. Further east, gridded NUCAPS data showed that 925 and 850 mb 0C isotherms are further north than model guidance suggest and given current temps in the upper 30s and slower trend on the passage of the Arctic front indicate that areas along and south of Interstate 66 and US-50 will see more rain or mixing with rain at the beginning of the precip event. Still, a 3-hr period of intense precip rates is expected this afternoon, mainly between 18-21Z, when Arctic air will be advancing southward. The low pressure system will be out of the picture by 00Z Monday with most of the snow gone, except in far northeast Maryland and in the mountains where snow will continue all night. New snow totals maps were changed slightly, basically to cut down on snow accumulations some, particulary along and south of Interstate 66 and US-50 and precip start time was adjusted to bring precip sooner.