yoda

Congrats all... hope you are all enjoying the snow

you asked and gave a list... I said accumulating snow.

accumulating snow of a dusting or greater

So where's the line going to be then? EZF? Quantico?

Guess you dont care then that the zones have snow likely for DCA... 70 percent chance

LOL

http://meteocentre.com/numerical-weather-prediction/forecast-systems.php?lang=en&map=na&mod=ukmet Scroll down to where it says meteogram... then click on USA up top of the page since it will send you to Montreal first

00z UKMET meteogram is 5-6mm of snow at DCA

lol 06z NAM is like 2:30 am I believe

VAZ052-091100- Prince William/Manassas/Manassas Park- Including the cities of Dale City, Manassas, Woodbridge, Lake Ridge, and Montclair 1026 PM EST Sat Dec 8 2018 .REST OF TONIGHT...Mostly cloudy. Lows in the mid 20s. North winds around 5 mph. .SUNDAY...Cloudy. A slight chance of snow in the morning, then a chance of snow in the afternoon. Snow accumulation around an inch possible. Highs in the mid 30s. North winds around 5 mph. Chance of snow 50 percent. .SUNDAY NIGHT...Mostly cloudy with a chance of snow in the evening, then partly cloudy after midnight. Little or no additional snow accumulation. Lows in the mid 20s. North winds around 5 mph. Chance of snow 50 percent.

00z HRDPS would suggest St. Mary's/Calvert/Spotsy/Stafford need WSW's lol

How much are your forecast to get? Enjoy the snow!

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1037 PM EST Sat Dec 8 2018 [snip] Perhaps the most notable and significant feature affecting the upcoming system is a compact shortwave diving southeast from the Hudson Bay vicinity. This shortwave is rotating around a larger cyclonic gyre centered over southeastern Canada near 60 W. This upper pattern has acted to enhance confluence over northern New England southward toward the Mid-Atlantic, which is resulting in the more west to east low track out to sea to our south. However, this shortwave feature to the north has appeared to deepen a bit more than forecast over the last 18-24 hours, resulting in subsequent subtle downstream height rises. It`s not much, but it appears it may be just enough to weaken the confluence near and to our north a touch, allowing a northward shift in the tight northern edge of the snowfall from low pressure passing to our south. 12z and 18z guidance has unanimously shifted northward. The latest 00z nam has stopped the trend, and still has the gradient between little or now snow vs. more significant snow south of Interstate 66 in Virginia and US 50 in Maryland. Given the majority of the guidance showing the gradient across these areas, headlines have been upgraded to Winter Storm Warnings for portions of central Virginia with Winter Weather Advisories across the Virginia Piedmont and central Shenandoah Valley where confidence is increasing that these areas will be south of the gradient. Farther north and east...closer to the gradient confidence was not high enough to upgrade at this time but this will have to be monitored overnight. Additional Winter Weather Advisories or Winter Storm Warnings may be needed. The most likely forecast was tweaked up slightly from the afternoon forecast, basically bringing up snowfall totals where most guidance shows the gradient being to the north. However, with such a tight gradient nearby this continues to be a forecast with low certainty across northern Virginia and central Maryland. A shift just 30 miles or so either way will have a significant impact on the forecast. See Winter Weather Page at www.weather.gov/lwx/winter for latest range of possibility graphics). Since this is a dynamic system with a lot of moisture and a tight heavy snowfall gradient, staying tuned to later forecast updates is prudent.

South trend continues See you in a few for the HRDPS

00z RGEM 0.07" QPF at DCA

URGENT - WINTER WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 1001 PM EST Sat Dec 8 2018 VAZ026-029-038>040-050-051-055-056-502-507-091115- /O.EXB.KLWX.WW.Y.0027.181209T1600Z-181210T0500Z/ Rockingham-Page-Greene-Madison-Rappahannock-Orange-Culpeper- Stafford-Spotsylvania-Southern Fauquier- Northern Virginia Blue Ridge- 1001 PM EST Sat Dec 8 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM SUNDAY TO MIDNIGHT EST SUNDAY NIGHT... * WHAT...Snow expected with accumulations around 2 to 4 inches. * WHERE...Portions of northern and central Virginia. * WHEN...From 11 AM Sunday to midnight EST Sunday night. The heaviest snow will be Sunday afternoon and evening. * ADDITIONAL DETAILS...Plan on snow covered roads and slippery conditions. Travel will be difficult. Temperatures will remain well below freezing Sunday night, so any untreated surfaces will remain snow covered and slippery.

00z RGEM gets snow into DCA Sunday afternoon

LWX in updated zones as of 935pm get snow accums into Charles County MD

How do you know that? Just by the dark blue colors or something else?

For you, no. For EZF and areas around them, yes

Sorry, had to edit my post with the snowfall map. Corrected now

Hmmm

It's out already... 0.1 QPF gets into PW

It's not updated on the mag website