WEATHER53

Rain to snow changeover work better than phase jobs. If there is rain then generally the cold air push is not strong enough to suppress nor run it due East

Wonderful for you all Merry Happy

Merry Christmas

Looking at temps and precip this month the years 1955,1975,1980,1984, 2017 match up. I don’t do pre DCA. This is before the showers tonight . All of the January’s were cold and couple very cold. Hope is alive

Surprise .15” for me

Main thing DC always has to stay away from is never ending 1-2 week push backs. Once that starts it rarely stopped. Couple weeks ago looked like 12/27ish might start a change so let’s hope first several days of Jan do because once we start the 1/8, no 1/18 then we are most usually SOL. Feb 2007 an exception but far from the rule

I think the group that got this started fist met on TWC board 20 years ago now. There was AccuWx too. Then Wright Weather in year or two.

Cover all the bases to claim accuracy no matter which way it turns out. That’s why beyond 5 days is useless

Overruns and we get 4” and is forecasted to switch to rain but usually just drizzles itself out

Really This Again?-pattern change just a month away. Probably the most over stated yet under occurrent statement that gets made here, along with the 360 GFS always showing a big winter event

He is correct. Very little that is ever confirmed comes from 7+ days out snow wise

That area in KY moving east and increasing in moisture Vety dry though

Lots of 45+ gusts Friend in Frederick 55.

Is there a tally sheet with the totals for everyone?

BWI 14.7 DCA 12.5 IAD 15.2 RiC. 9.0 Tie break SbY 9.0

I think we are In the favorable two months mostly below average trait DC displays. Not April May or Sept Oct this time. So we got from now until about 1/1/22-1/15 . These lows just wanna go west with some serious cold coming in behind but the miler Bs just don’t work here. 12.5” DCA seems right

Andrews23 DCA 30 and Andrews is further East and south and in a similar situation of marginal “heat island” influences of being surrounded by improved property. Andrews really is the killer of all OK at DCA.

Utterly correct non agenda fact backed observation and exactly how it is Most of the Time as opposed to last nights exception. Is BWI generally 5-10 degrees warmer than Glen Burnie? We know the answer

Last night had a range of 27-31 fir the suburbs. Andrews being merely 2 degrees colder is very rare and you all know that. in all honesty there is nothing for me to discuss with newcomers or those who have not closely monitored this irregularity for 40 years and are wedded to heat island. I noted about 5 other city stations along the east coast. Show me that they are always 5-10 degrees warmer than 1-10 miles away and I will shut up . if we get a chance like we do about once every 7 years Please watch DCA during an intense area wide snowstorm. 4” on ground everywhere, snowing moderately, DCA 29 and all others 24/25. I’ve seen that about 6 times. Where’s the heat island when blanketed in snow and snowing moderately or heavier?? kinda being told my eyes are deceiving me so rejecting that as I have for decades.

Last night had a range of 27-31 fir tge surfoubds. Andrews being merely 2 degrees colder is very rare in all honesty there is nothing fir me to discuss with newcomers or those who have not closely monitored this irregularity for 40 years. I noted about 5 other city stations along the east coast. Show me that they are always 5-10 degrees warmer than 1-10 miles away and I will shut up

Doug Hill has died Great guy. Always kind and thankful for obs and discussion

Did avoid another gross inaccuracy overnight and hit 32 for first time even with all surroundings 5-10 colder. I have no idea how to do it AND I would shut my mouth forever should the following occur. -Take Logan, La Guardia, Philadelphia, Baltimore, Richmond and Miami. Do those stations consistently read 5-10 degrees warmer than what is within 1-10 miles of them. I already know the answer for Baltimore is NO proof would be in that pudding. Heat island comment is a default dismissive attempt to look no further. If DCAs sensors are, for example, out on a overgrown former parking lot or located very close to the office to allow easy access then that could be an issue. Otherwise it’s kinda down to that the buildings to the west are leaking tremendous warmth because NSE is mostly parkway open space and water. So, where’s the heat? Downtown DC, NYC, surrounded on 4 sides-that’s a heat producer. And, same thing happens when Potomac is frozen even if less dramatic on order if 3-5 and not 5-10

5 am ob should do it maybe 4 Where is the spreadsheet?

DCA madness again last night Everyone else 24-27 DCA 33 Eveyone else dropping hour by hour until dawn DCA 33 for hours. Wherever those sensors are is a location prohibitive to accuracy for the area the station is designated to represent The thermos are reading correctly for wherever they are, it’s wherever they are thats the problem and produces the skewed and non representative reports. Freedom plaza or the Willard are all asphalt buildings and. concrete. That’s a heat island. DCA has buildings to the west and remainder water or open space. And , when Potomac is frozen or very cold, this still happens.

DCA tried really hard even with south component RIC did make it and I think I had like 11/13 for both,