arlwx

And from AKQ: (snip) .SHORT TERM /6 AM THIS MORNING THROUGH SUNDAY/... As of 345 PM EDT Thursday... Sunny and much cooler Fri with highs in the mid to upper 50s. Around 60 is possible near the coast. Expect breezy conditions in the morning, but winds will decrease by afternoon as the high builds in and the pres gradient relaxes. Cool high pres will bring the coldest night of the season to date Fri night/Sat morning. Lows around freezing (well) inland...m-u30s central to lower to mid 40s along the coast. Potential frost/freeze headlines will be contemplated by proceeding shifts as we get closer. Continued cool and dry on Sat w/ highs in the upper 50s to lowers 60s. Another weak front pushed south late Sat night bringing another sot of cool air and colder temps Sunday with high only in the low to mid 50s. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... As of 250 PM EDT Thursday... Cool high pressure becomes centered over the area Sunday evening- Sunday night before moving offshore by Mon aftn. Sun night looks like the coldest night of the season (so far), with lows in the low- mid 30s inland/upper 30s-mid 40s close to the immediate coast. Will continue to monitor the possibility of a freeze (mainly W of I-95).

From the latest LWX forecast: (snip) As winds subside tonight, radiational cooling will be excellent. With dewpoints in the 20s-lower 30s, stage set for a possible freeze everywhere except urban downtowns/near the Bay/Potomac. Will issue a Freeze Watch for area where growing season continues as forecast lows at or below freezing areawide except as noted above. && .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... High pressure this weekend, with a reinforcing trough axis/surface cold front Saturday night. Will be struggling to reach 50 degrees Sunday. If the growing season doesnt end by Saturday morning, Sunday night`s lows will likely do it. There could also be some upslope snow showers Saturday night-Sunday morning as well.

GFS is claiming cold shots may show up the mornings of 10/31, 1/1, 11/5 and 11/6.

GFS is claiming next chance for a freeze may be Halloween morning.

Dewpoints stayed up high enough for the airports to (officially) escape freezing this morning. DCA 44, BWI 39, IAD 34, RIC 39. But Manassas hit 30 and many Shenandoah Valley freezing obs.

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.

From AKQ: (snip) .SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY/... Attention turns to the srn stream system currently over SE TX for tonight through Sat. The operational models have trended toward a (slightly) more amplified system (the past 24 hours)...allowing more pcpn to be thrown back to the NW. RA likely will be the dominant ptype in ern/SE VA and NE NC...while SN is favor far NW. In between...the battle line will be drawn (basically centered along a line from SBY-RIC-AVC). The more amplified the system...the more potential for warming (in the mid levels)...though w/ marginal thermal profile/cold air in place...more QPF doesn`t necessarily mean more SN accum. There are differences in thickness/thermal profiles from model to model...and since there has been no cold air up until now...any SN accums difficult to determine...and P-rate/SN-rate likely to determine whether there is any impact on roads. The arrival of the upper level system on Sat may be enough to aid in cooling the column (w/ better UVM)...and bring a higher potential for SN across the FA (esp from central VA to interior lower SE MD). For now...will be holding off on any winter headlines (after coordination w/ nearby offices). Also...will have a rather wide zone of mix RA/SN centered along a line from AVC-PTB/RIC-XSA-SBY from tonight into Sat. Forecast SN accums 1-4 inches over the piedmont in VA to far interior lower SE MD...up to 1 inch to an EMV-PHF-OXB line. RA may mix w/ or end as little SN near the coast in ern/SE VA and over NE NC as pcpn diminishes (W-E) Sat afternoon through Sat evening. Cold but dry Sun w/ highs around 40F. (Lows Sat night m-u20s inland...l30s right at the coast in SE VA-NE NC). (snip)

Calvert just got added to the WSW. URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 427 AM EST SAT JAN 7 2017 MDZ018-071730- /O.UPG.KLWX.WW.Y.0002.000000T0000Z-170107T2000Z/ /O.EXA.KLWX.WS.W.0001.000000T0000Z-170108T0000Z/ CALVERT- 427 AM EST SAT JAN 7 2017 ...WINTER STORM WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING... THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A WINTER STORM WARNING FOR SNOW...WHICH IS IN EFFECT UNTIL 7 PM EST THIS EVENING. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * PRECIPITATION TYPE...SNOW. * ACCUMULATIONS...SNOW ACCUMULATION OF 3 TO 6 INCHES. * TIMING...THROUGH THIS AFTERNOON. * IMPACTS...SNOW ON ROADS WILL RESULT IN SIGNIFICANT TRAVEL IMPACTS AND DANGEROUS CONDITIONS. * WINDS...NORTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * TEMPERATURES...IN THE MID 20S. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 427 AM EST SAT JAN 7 2017 MDZ017-071730- /O.CON.KLWX.WS.W.0001.000000T0000Z-170108T0000Z/ ST. MARYS- 427 AM EST SAT JAN 7 2017 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... * PRECIPITATION TYPE...SNOW. * ACCUMULATIONS...SNOW ACCUMULATION OF 4 TO 7 INCHES. * TIMING...THROUGH THIS AFTERNOON. * IMPACTS...SNOW ON ROADS WILL RESULT IN SIGNIFICANT TRAVEL IMPACTS AND DANGEROUS CONDITIONS. * WINDS...NORTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * TEMPERATURES...IN THE MID 20S. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$

I have some unfond memories of how long it took to break into my car in 1994. A selling point for remote car starters.

Agreed. I was around in Fairfax VA for what I call GW 1979 and it was miserable with icicles as thick as my arm dangling from the roof. What a surprise. ((IIRC, the mets blew the forecast, but they didn't have all today's toys.)) Jan 96 in Woodbridge was less bad for me. ((If anyone looks, the mid-February Federal holiday is STILL officially Washington's birthday. The term President's Day did not start coming into common usage until after MLK Day became a federal holiday in 1986 and some states gave up Lincoln's Birthday as a holiday in exchange. I call the Feb 22-24 1987 KU storm (a surprise to me) GWII -a quick foot plus of snow that melted within a couple of days.))