WxUSAF

8am PWS from LWX Public Information Statement Spotter Reports National Weather Service Baltimore MD/Washington DC 804 AM EST Mon Dec 16 2019 The following are unofficial observations taken during the past 6 hours for the storm that has been affecting our region. Appreciation is extended to cooperative and CoCoRaHS observers, Skywarn spotters and media for these reports. This summary also is available on our home page at weather.gov/baltimore ********************STORM TOTAL SNOWFALL******************** LOCATION STORM TOTAL TIME/DATE COMMENTS SNOWFALL OF /INCHES/ MEASUREMENT DISTRICT OF COLUMBIA ...District of Columbia... National Zoo 1 WSW 0.2 700 AM 12/16 Trained Spotter MARYLAND ...Allegany County... Cumberland 1 SSE 1.6 730 AM 12/16 Trained Spotter Ridgeley 1 NW 1.3 445 AM 12/16 Trained Spotter ...Anne Arundel County... Severn 2 SSW 0.2 610 AM 12/16 CoCoRaHS Bwi Airport 0.1 725 AM 12/16 Airport ...Baltimore County... Glyndon 1 WSW 1.5 740 AM 12/16 Trained Spotter Reisterstown 1 SW 1.4 734 AM 12/16 Trained Spotter Bentley Springs 1 E 0.8 730 AM 12/16 Trained Spotter ...Baltimore City... Pimlico SE 0.8 708 AM 12/16 Trained Spotter ...Carroll County... Westminster 2 SE 1.8 740 AM 12/16 Trained Spotter Wagners Mill 1 ENE 1.5 650 AM 12/16 Trained Spotter Eldersburg 1 SE 1.2 645 AM 12/16 Trained Spotter Manchester 1 SSW 1.1 700 AM 12/16 Trained Spotter ...Frederick County... Adamstown 1 ESE 2.1 710 AM 12/16 Trained Spotter Bloomfield 2 WSW 2.0 655 AM 12/16 NWS Employee New Market N 1.3 530 AM 12/16 Trained Spotter New Market 2 NW 1.3 730 AM 12/16 Trained Spotter ...Harford County... Bel Air 2 W 1.2 645 AM 12/16 Trained Spotter Forest Hill 3 SW 0.8 615 AM 12/16 Trained Spotter ...Howard County... Sykesville 2 SSE 1.4 700 AM 12/16 CoCoRaHS Simpsonville 1 SSE 1.1 645 AM 12/16 Trained Spotter Elkridge 2 W 1.0 650 AM 12/16 Trained Spotter Columbia 2 N 0.6 615 AM 12/16 CoCoRaHS Elkridge 0.6 630 AM 12/16 NWS Employee Laurel 1 NNE 0.1 600 AM 12/16 CoCoRaHS ...Montgomery County... Norbeck 1 ESE 1.3 700 AM 12/16 CoCoRaHS Damascus 1 SE 1.2 700 AM 12/16 Trained Spotter Germantown 5 NNE 1.2 600 AM 12/16 CoCoRaHS Clarksburg 3 E 1.1 629 AM 12/16 Trained Spotter Aspen Hill 1 SW 1.0 720 AM 12/16 Trained Spotter Gaithersburg 3 NE 1.0 700 AM 12/16 CoCoRaHS Germantown 2 WSW 1.0 730 AM 12/16 Trained Spotter Olney 1 ENE 0.8 545 AM 12/16 CoCoRaHS ...Prince Georges County... Beltsville 1 NNW 0.6 645 AM 12/16 CoCoRaHS Oxon Hill 0.2 700 AM 12/16 Co-Op Observer Oxon Hill 1 W 0.2 700 AM 12/16 CoCoRaHS ...Washington County... Boonsboro 3 NNE 1.6 600 AM 12/16 Trained Spotter Hagerstown 1 ENE 1.6 700 AM 12/16 CoCoRaHS Williamsport 3 ENE 1.2 534 AM 12/16 CoCoRaHS VIRGINIA ...Arlington County... Reagan National Apt 0.1 655 AM 12/16 Airport ...Clarke County... Berryville 1 NNW 1.0 555 AM 12/16 Trained Spotter ...Fairfax County... Herndon 2 ENE 0.5 630 AM 12/16 Trained Spotter Herndon 1 NNE 0.5 600 AM 12/16 NWS Employee ...Frederick County... Winchester 4 ENE 1.0 546 AM 12/16 Trained Spotter Stephens City 2 E 0.6 635 AM 12/16 Trained Spotter ...Highland County... Mill Gap 1 SW 0.4 600 AM 12/16 Co-Op Observer ...Loudoun County... Leesburg 1 ESE 0.5 515 AM 12/16 NWS Employee Dulles International 0.4 700 AM 12/16 Airport Purcellville 0.4 355 AM 12/16 NWS Employee WEST VIRGINIA ...Berkeley County... Bunker Hill SE 1.9 718 AM 12/16 Trained Spotter Martinsburg 2 E 1.7 700 AM 12/16 NWS Employee Martinsburg Arpt 1 N 1.5 600 AM 12/16 Trained Spotter Inwood 1 S 1.5 513 AM 12/16 Public ...Grant County... Kline Gap 2 ESE 1.0 615 AM 12/16 Trained Spotter ...Jefferson County... Halltown 2 W 1.8 745 AM 12/16 Trained Spotter Ranson 2 NE 1.8 745 AM 12/16 CoCoRaHS Millville 1 ESE 1.5 656 AM 12/16 Trained Spotter Bloomery 3 SSE 1.2 705 AM 12/16 Trained Spotter Rippon 2 W 1.0 455 AM 12/16 NWS Employee **********************24 HOUR SNOWFALL********************** LOCATION 24 HOUR TIME/DATE COMMENTS SNOWFALL OF /INCHES/ MEASUREMENT MARYLAND ...Anne Arundel County... Severn 2 SSW 0.2 610 AM 12/16 CoCoRaHS ...Howard County... Sykesville 2 SSE 1.4 700 AM 12/16 CoCoRaHS Laurel 1 NNE 0.1 600 AM 12/16 CoCoRaHS ...Montgomery County... Norbeck 1 ESE 1.3 700 AM 12/16 CoCoRaHS Germantown 5 NNE 1.2 600 AM 12/16 CoCoRaHS Gaithersburg 3 NE 1.0 700 AM 12/16 CoCoRaHS Olney 1 ENE 0.8 545 AM 12/16 CoCoRaHS ...Prince Georges County... Beltsville 1 NNW 0.6 645 AM 12/16 CoCoRaHS Oxon Hill 0.2 700 AM 12/16 Co-Op Observer Oxon Hill 1 W 0.2 700 AM 12/16 CoCoRaHS ...Washington County... Hagerstown 1 ENE 1.6 700 AM 12/16 CoCoRaHS Williamsport 3 ENE 1.2 534 AM 12/16 CoCoRaHS VIRGINIA ...Highland County... Mill Gap 1 SW 0.1 600 AM 12/16 Co-Op Observer ***********************STORM TOTAL ICE*********************** LOCATION STORM TOTAL TIME/DATE COMMENTS ICE OF /INCHES/ MEASUREMENT MARYLAND ...Montgomery County... Aspen Hill 1 SW T 720 AM 12/16 Trained Spotter VIRGINIA ...Rockingham County... Dale Enterprise 1 ES 0.01 730 AM 12/16 Trained Spotter

1" today, 1.2" on the season.

Northern and central MD counties

@mattie g is very disappointed

Howard too. My daughter is running around the house My wife is...not

Just measured 1” on the dot for my spotter report. Sleet falling now.

Eyeballing about 1” with light snow still falling. Very pretty. Will go out to measure on the snowboard shortly.

IAD 0z sounding had wet bulbs below freezing through the entire column except maybe right at surface. Low levels are dry. Virga fest to start. And yes, models account for that.

Temp doing a very annoying increase

6 isn’t a cold phase, but 7 and 8 are

36/23 with clear skies and dews still dropping along with the temps.

Indian Ocean dipole SST pattern for the IO

Saw a report of 0.5” in 17mins near Cincy

Always love overperforming warmth the day before snow

Precip moved south again, but snow/ice looks basically unchanged.

I’d be pretty happy with the 3k NAM. About 5 hours of light snow with temps near freezing for 0.5-2”. Would stick to all the trees well and be very pretty before getting washed away.

Euro did inch southward, but it's a touch drier on the front-end. More in line with other guidance now. dusting-2" of snow before mix it looks like.

@psuhoffman our thoughts are very similar. The Pac flood continues to get can kicked, muted, and washed out. Good trends for high latitude blocking so far. It’s just hard to overcome a meh Pac in the early season. Much more feasible in JF. I’m impatient as we all are, but I’m still objectively optimistic on the winter .

I think any next ravens win, or losses this week by both KC and NE would do it. Ravens have an effective 2 game lead thanks to the tiebreaker.

That counts

Somebody start a thread for monday

Everyone’s drinking when looking at them

Position of the TPV in Canada has big implications. It moving west hurts in two ways. 50-50 isn’t as strong and therefore doesn’t hold cold air in, and it prevents ridging out west where we want it.

Ensembles overnight did not move in a good direction for the pre-Xmas storm. Rather than phasing most of the PV into the 50-50 for Monday’s storm, they want back to leaving most of it up over far NW Canada. This keeps the flow more progressive over the conus. Euro and Eps want nothing to do with it.

Yessssss