RIC_WX

14.2 in Swanton just before 7AM. Crystal clear blue sky and frost everywhere.

I was going to post this yesterday but somehow resisted it. Thank you. As for GEFS, I get the feeling there is a classic thermal boundry setting up for the late holiday / post holiday period. On the right side of the boundry is cold/dry and on the wrong side you have today and the rest of this week. This pattern will eventually produce some cold days and nights, and pity snows (cartoppers). Chance of brine 90%. There is legit cold air in western canada but without a mechanism to force it down, it's hard to envision a sustained period of deep winter. IIRC the all time January high temp for several stations in VA was set in late January 2002 (~80*F).

26* Leesburg 17* Swanton (low of the season) These numbers aren't being challenged anytime soon

Better the 14th than the 24th

72/52 Leesburg, cloudy 41/39 Swanton, light rain

Snowing off and on at Deep Creek since about sunset yesterday. Didn't really accumulate much before midnight, when winds picked up and temp dropped to 29*. Maybe 1" total so far but the frequent wind gusts to 30 MPH have really obliterated any chance for casual mesurement.

Light snow all morning accompanied by a flash freeze. Windy too. Finally cold enough to light my wood stove for it's inaugural burn.

Between warm lakes and a predominant Miller B storm track, I see a lot of chances to score assuming we start and end cold. As long as January isn't a dreaded pac puke zonal flow (I see this pattern in several analogs), normal wx is plenty cold to still snow in the highlands. I understand 19-20 was close to a generational low for Garrett and they still managed 50"-60". I would guess if this repeated itself it falls in the range of 50% of normal. Not impossible but have to believe we can do better. I see snow pops in the zones for Saturday-Monday coming up. Looking forward to getting back up after 3 weeks of work travel.

Thing is, if they left the colors the same, removed the "inch" predictions and just said "between 50%-100% of seasonal normal" it would almost impossible not to verify. This is a safe prediction most years and especially so in a nina and even more so for the F5 viewing area. Most of the population in the highlands isn't watching Fox 5 anyway

No one is really talking about how warm the great lakes are, basically everywhere, and when the pattern eventually does flip the LES potential could be epic.

Not even a frost at mine. Been checking the cameras past 2 mornings, nothing. Last year it was September 15.

Even if similar, won't be close to the same. We throw around temperature comparisons without consideration of precipitation. The mid 2001-mid 2002 year was amongst the driest on record for the mid atlantic, precip maybe 50%-60% of normal. Nothing about the current era is remotely comparable to this. I think it fully disqualifies this analog, although most defnitely not suggesting it couldn't still turn out similarly mild.

It snowed on thanksgiving. 89-90 maybe the most front loaded winter of the past 50 years. I can't entirely imagine a 2021 version of this to be nearly as interesting.

Some hints on LR GFS that at least the Potomac highlands could see first frost/freeze in the 25-26 time period. Hard to imagine getting out of October without this happening, but fairly certain most of the region has the growing season persisting even into the higher elevations. It's getting pretty late in the season for this to not have happened at least once.

Given that we are ~+7* or so for the month going into today, and this looks to maintain / build going into mid month, how does this compare with other weak-mod la nina Octobers? The model is depicting potentially a near historically warm October and not just here. Outside of a couple cool downs to normal, pattern looks impressively (or depressingly) stable.

First hint of color showing up around Deep Creek, a few days earlier then I remember last year. I suppose a couple nights in the upper 40's last week and again this week are helping this along.

IAD is only showing +1.6F for the month. Kind of a testament to how warm the new normals are I guess. It's also easy to forget we were solidly negative for the first 7 days of the month (and +4.7 since 8.8). If the next 4-5 days were not predicted to be so hot the overall month would finish solidly...normal.

Getting a wx station established ahead of winter is on my list of 1,000 unfinished projects. Something tells me I will get around to it by the time it really counts.

https://www.drought.gov/watersheds/mid-atlantic Actually, if it falls as depicted over the mountains it is falling where it is needed the most (see link). Riverflows to the west of DC are pretty low, and the rain falling overtop of DC metro isn't going to change that.

High and dry at Deep Creek Lake

Can you review the weather flow tempest? Reading reviews online that the haptic rain sensor overestimates and then smooths out after the fact to try and correct itself. True?

Wrapping up now, 2.1" and tree down at home across street.

Quite the storm parked over east side of Leesburg, several episodes of hail and closing in on 1" with no sign of slowing down anytime soon. 71/71

The line of storms rolling through Deep Creek is legit. Let's see if they hold together crossing these hills.

Leesburg VA: 39.091N 77.514W Swanton MD: 39.508N 79.255W