arlwx

Croosposting from obs... outside the beltway threat for the 19th; Frederick MD-Carroll-Northern Baltimore-Northwest Montgomery- Central and Southeast Montgomery-Northwest Howard- Central and Southeast Howard-Northwest Harford-Augusta-Nelson- Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Prince William/Manassas/Manassas Park-Fairfax-Stafford- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Western Pendleton-Eastern Pendleton- Including the cities of Frederick, Ballenger Creek, Eldersburg, Westminster, Reisterstown, Cockeysville, Germantown, Damascus, Bethesda, Rockville, Gaithersburg, Silver Spring, Lisbon, Columbia, Ellicott City, Jarrettsville, Staunton, Waynesboro, Stuarts Draft, Lovingston, Charlottesville, Stanardsville, Madison, Washington, Orange, Gordonsville, Culpeper, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston, Herndon, Annandale, Centreville, Chantilly, McLean, Franconia, Falmouth, Warrenton, Turnbull, Hightown, Monterey, Purcellville, Leesburg, Ashburn, Sterling, Riverton, Brandywine, Franklin, Oak Flat, Ruddle, and Sugar Grove 315 AM EDT Fri Oct 18 2019 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures around 33 to 36 degrees resulting in areas of frost. * WHERE...Central Maryland, northern and central Virginia, and the Potomac Highlands. * WHEN...From 2 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered.

Summary: 3-7 inches north and west, maybe 8 for the far north and west. Close in to DC, maybe 1-3 inches.

LWX has updated their WSWs and WWAs.

I would not have believed you until I checked for near DCA: Freezing rain and sleet. High near 33. East wind around 8 mph. Chance of precipitation is 100%. Total daytime ice accumulation of less than a 0.1 of an inch possible. Total daytime sleet accumulation of 2 to 4 inches possible. Was LWX trying to invoke St. Patrick's Day 2017? Or had they run out of water at Sterling and had to resort to stronger stuff? ((I'm joking, but there was a situation when a (NON NWS) conference staff suite ran out of cola on Sunday morning....)) I'm hoping this was just some ham-handed mistake by whatever tired intern dragged up from his sleeping bag got told to update.

Don't leave home just yet if you don't have to. WTOP just noted nine crashes and two unresolved situations in its two-minute traffic report. I'm sure there are more out there.

About half the flights at DCA are still cancelled. But a few are actually departing now (in contrast to WTOP's claim).

I'm pretty sure my result (2 miles west of DCA) was about 2.5 inches before the s**** and f***** **** knocked down the totals on the hedges.

I think they are all hoping (as I am) that the overnight blowtorch will take care of it, if the DOTbergmakers haven't. But as usual, tune into your favorite newspeddlers at 4 am again.

It's finally gotten to 32 and IP at DCA. It's beating down my accumulations. I want R*** to wash away the other stuff so I don't have to play with it tomorrow.

WTOP just had reports of mixing in Warrenton, Spotsy and Stafford.

I'm eyeballing about 2 to 2.5 inches on the hedges in South Arlington. About to get ready to officially measure.

WSTOP just had someone on from DDOT claiming they would start plowing.

My storm total in Arlington VA was 9.5. I had gotten a path cleared to my car, but now I have to do that and the car ALL OVER AGAIN.

WTOP just reported that (Metrorust) will stop service at the ends of their current runs. (Metrosnail) was not said to be affected, but with totals above 8 inches, I expect aboveground stations to be affected.

Calvert County schools just said they would close.

St Mary's schools just threw in the towel too.

Charles County also gave students tomorrow off.

In Northern VA, only Loudoun and Manassas Park haven't yet decided to close schools on Monday. In MD, only PG decided yet to close schools. https://wtop.com/closings-and-delays/

Visibility down towards 1/2 mile in Arlington VA. ((WHO worked to dump this much s*** on me??))

At 2 pm, I had 6.7 inches in Arlington VA. I got my car mostly cleaned off, was too cold to continue, went inside and around 3 pm it started sticking again. Eyeball guesstimate: ANOTHER 3/4 to one inch.

As of 1055 am: 6.2" in Arlington VA. Intellicast showed some pink for a while just to my south, but then it turned blue again.

5.7" in Arlington VA.

The latest from LWX: .NEAR TERM /THROUGH TONIGHT/... Forecast is largely on track this morning as surface low moves eastward from Tennessee and redevelops along the North Carolina coastline before moving east-northeastward and out to sea tonight. At the same time, the upper level trough will close off this afternoon and track overhead this evening. Widespread light to moderate snow is being observed this morning with generally 2-4" already reported across the area as of 3 AM. Continued light to moderate snow, with occasional heavier bursts, is expected through today for much of the region as isentropic lift and upper level forcing persist through the day, with a couple exceptions. Drier air will work into portions of northern/western MD and eastern WV after sunrise, and this will curtail snow amounts/intensity. Additionally, warmer air will push northward into portions of central VA and southern MD, introducing sleet/rain/freezing rain to that region heading into Sunday morning. Between these areas the most significant amounts are expected to occur. Models are also indicating that a deformation band may occur again late this afternoon and evening as the upper level low traverses, and this is currently progged to occur near the I-95 corridor, with the localized highest amounts likely where this sets up. Total snowfall amounts expected to range from 6-10" across the DC metro area and across much of northern VA, tapering to 4-7" north towards the PA/MD border where drier air will cut down on amounts, and 4-8" towards southern MD and central VA near Spotsylvania/Orange/Albemarle where mixing occurs. In these areas, a light glaze to up to a tenth of an inch of ice is also forecast. Snow will then taper off and end during the overnight hours. Highs today generally 28-35F, with lows tonight in the 20s. &&

VDOT plows already onboard in SW VA. http://vdotplows.org/

DCA hit 32 as of 3 am on the 11th.