Areas of a.m fluff falling that gave way to sun and clouds
Bittinger 2NW Valley
precip +
SF 1.0
Event total 3.3
SD 2.5
Season to date total snowfall 28.0
Dyacon Data Below
Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning
Garrett County Airport
Top of Wisp
Station remains offline.
–
Canaan Heights/Davis 3SE
7am to 7am data mmts coop bp
Climate Reference Network Canaan
oddly the CRN remains offline
Cabin Mt at Bald Knob
Canaan Ski area
Cabin Mt-Western Sods
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refuge
Mt.Davis
Snowshoe
Petersburg Grant County Airport
Elkins Airport
SITE COMPARISON
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport and Mt.Davis
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
Sideling Hill
––
Polish Mt
Cumberland to Lavale
––––––––
Frostburg
Grantsville to Savage Mt
Amish Rd near 3000′Amish RdAmish RdAmish Rd near Rt 40 just east of Keysers Ridge Amish Rd/Rt 40 The CasslemanCassleman Bridge Penn AlpsPenn AlpsPenn AlpsPenn Alps-Stantons MillHilltop ––––Sideling Hill in the far distance
Areas of snow, heavy bands. The haves and have nots. Some periods of broken blue sky as well.
Bittinger 2NW Valley
precip +
SF 2.3
SD 2.3 5pm
Snowfall season to date 27.0″
Dyacon Data Below
Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Towards Bowman Hill morning Bittinger 2NW Valley afternoon
Garrett County Airport
Top of Wisp
no data, station down
Canaan Heights/Davis 3SE
7am to 7am data mmts coop BP
Climate Reference Network Canaan
Station down
Cabin Mt at Bald Knob
Canaan Ski area
Cabin Mt-Western Sods
Bear Rocks-Dolly Sods
Spruce Knob
■Photos below by Sami Kahn
––––
Webcam view below :
Canaan Valley Refuge
Mt.Davis
Snowshoe
Petersburg Grant County Airport
Elkins Airport
Site Comparison
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport and Mt.Davis
Canaan area temps
Sods Plateau
Anemometers frozen except Bear Rocks
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
Some light a.m snow, then mainly cloudy with some scattered pockets of snow.
Bittinger 2NW Valley
Precip .01
Year to date total precip
SF .1
SD .2 7am
Season to date Snowfall 24.7″
Dyacon Data Viewer
Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning West of Bittinger morning Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon South end of Amish Rd afternoon
Garrett County Airport
Mchenry morning Rock Lodge Rd morning Deep Creek Lake morning Sand Flat Rd morning Ditto Ditto
Top of Wisp
Station down- no data. Rooftop stations impact data and make maintenence tougher. The EMA getting all this grant money for these poorly sited stations and half no longer work.
Afternoon back side
Canaan Heights/Davis 3SE
7am to 7am data mmts coop BP
Climate Reference Network Canaan
Cabin Mt at Bald Knob
Cabin Mt-Western Sods
–
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refuge
Mt.Davis
Snowshoe
Petersburg Grant County Airport
Elkins Airport
Site Comparison
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport and Mt.Davis
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500 Height Anomalies and Flow
Winter Weather Advisories out and also touch of Christmas Eve Snow?
December 20, 2024 8:14am
Let’s begin with the current conditions at 8am 12/20/24
Temps- Mainly 20s across the high ground, and 30-32° as you get to some of the lower areas.
–
Radar- pretty light stuff this morning, but enough to coat any untreated roads.
–▪︎Rock Lodge Rd, Garrett County 7:45am
The better slug of precip looks to cross the southern Alleghenies later/overnight. The Weather Service out with Winter Weather Advisories, Randolph County and south in the Alleghenies and on down the higher Appalachians.
–
NWS Expected Multi Day tally.
–
Tonights batch looks to do best in the southern Alleghenies and then on Saturday, watch the for potential of a few high ratio lake bands north. Not a lot of moisture associated with them, just high ratio fluff.
A look at the GFS which I ran through Christmas Day. Watching that potential of a bit of snow Christmas Eve. Euro and Canadian models similar, but with their own variances.
–
-temps off the GFS
–
Modeled Snow Depth 7am Christmas (model does not consider many localized factors)
Not a strong part of the modeling parameters. They do try to hold a little snow cover for Wednesday at 7am, Christmas Day. – the snow we have coming is of little mass. Meaning there is little holding power. It is falling on cold ground, during the lowest sun angle period of the year and dewpoints remain low Monday. That helps limit melt in aress that pick up a few inches. – Tuesdays event, minimal event, but as of now a potential of 1″ possibly 2″ of wet snow. Occuring with temps low to mid 30s. So you’d expect a bit of melt of what falls and what is on the ground in areas that pick up some snow. – the GFS breaks clouds up enough Tuesday night to allow temps to drop back im the teens and 20s Christmas morning. Euro keeps clouds socked in, temps steady upper 20s, low 30s. – so given that, if we can get some of these snow aspects today-Saturday to work out, and again Tuesday, some areas definitely have the potential for some white on the ground Christmas morning. – Temps on Christmas look to hold mainly 30s at this point. – overall not cold next week beyond Christmas. Things actually look to dry out once we get past the Christmas eve precip. Temps remain maxes upper 30s to mid 40s, mins upper 20s to lower 30s. Not cold, but also not that terribly mild.
A bit of light snow, and freezing drizzle/mist overnight. Touch of high elevation rime as well. Mainly cloudy for most today Canaan area and north. Some sun broke out south.
Bittinger 2NW Valley
precip .16
SF .2
Season to date 24.6
dyacon data below
Foxtown Rd morning West of Bittinger morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning West of Bittinger morning Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon
Clear cold valley start. A rapid clouding up and showers mid to late morning. Some protected valleys, just briefly below freezing as it started. Rain to flakes after dark.
Bittinger 2NW Valley
precip .38″+
Year to date total precip 51.70
SF 0
SD T
Year to date total snowfall 24.4
Dyacon Data Below
West of Bittinger morning West of Bittinger morning Up from Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning West of Bittinger morning, clouds rapidly incoming West of Bittinger morning Rock Lodge Rd near The Glades morning Bittinger 2NW Valley afternoon West of Bittinger evening Rock Lodge Rd near The Glades evening
Garrett County Airport
Rock Lodge Rd morning Mchenry evening
Top of Wisp
Afternoon Evening
Canaan Heights/Davis 3SE
7am to 7am data mmts coop bp
Climate Reference Network Canaan
Cabin Mt at Bald Knob
Cabin Mt-Western Sods
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refuge
Mt.Davis
No data due to mid October bear attack on the station
Snowshoe
Petersburg Grant County Airport
Elkins Airport
–
Site Comparison
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground cold spots vs DCA
RTMA
Radar
Some of that leading edge occured briefly with some valleys below freezing
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
The much hyped “Warm” Christmas is by no means a lock. It’s not to say it won’t end up being mild. In a progressive pattern, a week out in the modeling world is long time. Just 2 days ago modeling went well above normal Christmas to New Years and while not cold, it’s backed off considerably.
There are plenty of flys in that ointment. Lets look at the first thing that should make you pump the breaks on warmth. Thats a very cold departing High Pressure Christmas morning sitting in New England. Any time you see that this time of the year, the risk of over running and cold air damming will exist.
–
That’s a cold dry high. Modeled temps a week out(and this could significantly change) are below 0 across New England.
–
Lets put the temps in motion off the Euro. Cold through the weekend in to early next week. A bit of moderation by Christmas, but not all that warm. 30s mainly across the high ground on Christmas. Again a week out, plenty on time to see this adjust.
0z Euro
The 6z GFS temps. Very similar.
–
▪︎ Precip, any snow chances pre Christmas. Yes. Modeling has slightly increased the upslope this weekend. The Euro holds 1-3, for areas outside the WV high ground, and 3-6 over the Wv high ground and also brings in a little potential Christmas Eve. The GFS is a bit more bullish on 3-6″ this weekend. Each hint at some over running on Christmas day. Meaning a little mix/freezing rain potential, as well as a cold rain potential. Stressing a week out.
The 0z Euro
–
the 6z GFS
–
The 8-14 map. You may see that and just think there is no way, it’s warm everywhere.
1▪︎ this map is a 7 day map from 12/25 to 12/31.
2▪︎ this map is a “probability” map of above average temperatures. It is not a temperature map. Its not an anomaly map. It’s a probability of above normal. Not how much above normal. Example- If a area has a average min of 19 and max of 35 and mins run 24 and the max runs 34. That’s above normal. Many locations can see wintry precip in December through February with above normal temps. Just to put that hype in perspective.
–
Next point, here is the 6-10 day which runs the 6 day period of 12/23 to 12/27. When you look at the overlapping period. You’d suspect departing cold right around Christmas. New data isn’t as warm(again not cold) from Christmas to New Years. A few days ago modeling ran 50s to 60. Now 30s, 40s, maybe a 50.
–
So, in recap
Turning colder today. Rain ends as flakes. Little if any accumulation.
Accumulation potential as we head in to the weekend
Dry and cold the second half of the weekend and to start next week
Some precip on the moderating trend Christmas eve and Christmas day and that may very well be cold enough for wet snow, mix, freezing rain or a cold rain
While not much and not a strong parameter of modeling. Models hold a bit of snow cover on the ground Christmas morning
––
So don’t write it off as brown and warm Christmas just yet. Cold highs north can have other plans.
–
Will post more between now and next Wednesday, Christmas Day. Tis the season.
Some clouds early, lots of sun increasing north to south by afternoon
Bittinger 2NW Valley
Precip .16 Year to date 51.32
SF 0, SD T Snowfall season to date 24.4
dyacon data below
–Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Up from Bittinger 2NW Valley morning Rock Lodge Rd near The Glades morning Bittinger 2NW Valley afternoonBittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon
Garrett County Airport
Deep Creek Lake morning Deep Creek Lake morning Sand Flat Rd morning Sand Flat Rd morning
Top of Wisp
Afternoon Afternoon
Canaan Heights/Davis 3SE
7am to 7am data mmts coop bp
Climate Reference Network Canaan
Cabin Mt at Bald Knob
Whitegrass Cabin Mt
Cabin Mt-Western Sods
Timberline
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refuge
Mt.Davis
No data due to Mid October bear attack on the station
Snowshoe
Petersburg Grant County Airport
Elkins Airport
Site Comparison
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
Depending on location. Some areas with a icy start. Some a wet start. Some dry. Some mild. Some cold
Bittinger 2NW Valley
precip .48
year to date precip 51.16
SF 0
SD .5
Snowfall season to date 24.4″
total ice accretion .25 to .3
Dyacon Data Below
Foxtown Rd morning Foxtown Rd morning Foxtown Rd morning West of Bittinger morning West of Bittinger morning West of Bittinger morning Old Cherry Glade Church morning Up from Bittinger 2NW Valley morning Up from Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW morning Bittinger 2NW morning-east facing field edgeBittinger 2NW morning Bittinger 2NW morning Bittinger 2NW morning Bittinger 2NW morning Bittinger 2NW morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning experimental fridge spotBittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Towards Bowman Hill morning
The Glades
Morning pics
––––––––––––––––––––––––––––East facing field edge Peat Moss Rd
Garrett County Airport
Mchenry morning -no iceMchenry morning –
Top of Wisp
Canaan Heights/Davis 3SE
Climate Reference Network Canaan
Cabin Mt at Bald Knob
Cabin Mt-Western Sods
–
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refuge
Mt.Davis
no data due to mid October bear attack on the station
–
Snowshoe
Petersburg Grant County Airport
Elkins Airport
-Site Comparison
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
NOW THE WEDGE SNOW/SLEET RESULTS( a bit of the light western edge was on the ground pre event)
–
Grantsville to Savage Mt
From mostly bare ground Grantsville, to a slight coating of ice at Hilltop area, a increase of ice from Meadow Mt and east and sleet+ice accretion at Savage Mt. Sleet accumulation appeared around .5 to .8, ice around .2 to .4. Irregular ice accretion that appeared strongly likely due to riming early Sunday that began to take on freezing rain and that always makes it irregular as the rain soaks in and freezes.
–––––––Touch of ice, hilltop –They reported 1″ of snow accumulation that did not occur–Ice increased at Meadow Mt––––
Finzel Swamp
Side stop atop Savage Mt at Finzel Swamp
–––––––––––––––––––––––––––––––––––––––
Frostburg
After early ice, a sleet, snow zone, with late ice. Accumulations looked like 1.5 to 2″(eye test guess)
–
Lavale to Cumberland
Appeared around 2.5″ +/- Lavale, maybe a touch less Cumberland. This would have shrunk a bit since max as temp was 35. Early glaze ice to sleet, to dominant snow ending as little rain.
–––––––––
Rocky Gap to Martin’s Mt
After glaze ice early yesterday. To snow and appear like 2-3″ , especially over the top
–
Flintstone to Polish Mt
A 2 to 3″ looked like the norm here
––––––
15 Mile Creek to Green Ridge
Amounts looked like 2-3″ through this zone.
––––
Town Hill
A solid 3″ here
–––––––
Buck Valley to Amaranth
2-3″ zone
––––
Webcams
33 east of Harman in the milder sector this morning Blue Knob saw dominant precip period as snow. A guy up there guestimated 3-4″ last evening Town Hill Fulton CountyMd/pa border
Cloudy, areas of freezing rain, sleet, snow, rain. Not a major event, that needs noted. It was on the heels of a cold period so it impacted roadways significantly though. A extreme glaze as it started in many parts of the area.
Bittinger 2NW Valley
Precip +(will melt event in morning)
SF .1(sleet)
SD 1
snowfall season to date 24.4
Dyacon Data Below
Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley morning Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW Valley afternoon Bittinger 2NW afternoon Bittinger 2NW afternoon Bittinger 2NW afternoon
Garrett County Airport
Top of Wisp
Canaan Heights/Davis 3SE
Climate Reference Network Canaan
Cabin Mt at Bald Knob
Cabin Mt-Western Sods
In what was primarily a rain event Cabin Mt west. A few brief periods of flakes occured
Bear Rocks-Dolly Sods
Spruce Knob
Canaan Valley Refue
Mt.Davis
no data due to mid October bear attack on the station
Snowshoe
Petersburg Grant County Airport
Elkins Airport
SITE COMPARISON
The Valley vs Cabin Mt
Bittinger 2NW Valley vs Garrett County Airport
Canaan area temps
Sods Plateau
High Ground Comparison
Up High and Down Low
Up High, High Valley, Low Valley
The Valleys
Wv High Ground Cold Spots vs DCA
RTMA
Radar
Satellite
Flow
Current Surface Features and 500mb Height Anomalies and Flow
Town Hill
Martin’s Mt
Glazing in process
Cumberland to Lavale
initial temps above freezing Cumberland, freezing rain glaze returning Lavale to Frostburg
Frostburg
–
Savage Mt to Grantsville
–-freezing Rain plus rime occuring –––Amish Rd, Glazed…County roads has NOT been on the ball with cinders this year. Operating like Garrett County is in the poor house. ––