MN Transplant Posted November 29, 2023 Share Posted November 29, 2023 2 minutes ago, cbmclean said: I wouldn't think the LR radiation would be the culprit. It would go through the dry air with little heating, whether the air is moving or not. I would think the factor of moving air would be its ability to carry away the heat being transferred by convection. Sort of like wind-chill for the earth I was thinking more about inversions and moisture/aerosols, but your convection idea is also solid. The other thing that the wind does is to prevent the cold-air drainage and microclimates from setting up. So, the difference between IAD and DCA is always going to be muted in CAA scenarios because IAD also will not be able to form their ridiculous cold-pool inversion. Link to comment Share on other sites More sharing options...
RIC Airport Posted November 29, 2023 Share Posted November 29, 2023 Even Richmond reached 19°F this morning. This doesn't happen in November very often. Note below going back to 1950 the last time Richmond recorded teens during the month was in 2014. It did reach 20°F in November as recently as 2019, 2013, 2008 though. 5 Link to comment Share on other sites More sharing options...
H2O Posted November 29, 2023 Share Posted November 29, 2023 That’s great and all but in those years did RIC have perfect snows? We need signals, my good man!! RIC sub 20°+ PSU snow+ WDI+ press *69 on the panic room hotline= epic winter for everyone 1 Link to comment Share on other sites More sharing options...
RIC Airport Posted November 29, 2023 Share Posted November 29, 2023 23 minutes ago, H2O said: That’s great and all but in those years did RIC have perfect snows? We need signals, my good man!! RIC sub 20°+ PSU snow+ WDI+ press *69 on the panic room hotline= epic winter for everyone 1965-66 was. Link to comment Share on other sites More sharing options...
stormy Posted November 29, 2023 Share Posted November 29, 2023 Low of 9.1 at 7 am. Record low at Staunton since 1893 was 10 in 1967. 5 Link to comment Share on other sites More sharing options...
WEATHER53 Posted November 29, 2023 Share Posted November 29, 2023 24 for a low and now 37 1 Link to comment Share on other sites More sharing options...
pazzo83 Posted November 29, 2023 Share Posted November 29, 2023 5 hours ago, WxUSAF said: I don’t know if there’s any literature about it, but I started dabbling with a project in grad school that would have shown that UHI is minimized during cold air advection as opposed to basic radiational cooling. Never got very far with it, but I think last night is a good demonstration of that idea. yep - that's the only way NYC cools off at night in the winter. Otherwise you get like 5-6 degree diurnal temperature variation lol. DCA is similar but it's not quite as profound. NYC is nuts. Without a fresh fetch of cold air coming down the Hudson your low is maybe a degree or two off from the temp at, say, 5pm. Often times it goes up a couple of degrees between 2am and sunrise. Link to comment Share on other sites More sharing options...
pazzo83 Posted November 29, 2023 Share Posted November 29, 2023 The above also creates some obscene temps differences between the city and even some close-in suburbs. I remember once leaving the city on a chilly morning (temp was around 20F) - we had to go out to Warren NJ for work (which isn't THAT far from the city), and it was around 0F when we got there lol. Link to comment Share on other sites More sharing options...
pazzo83 Posted November 29, 2023 Share Posted November 29, 2023 2 hours ago, stormy said: Low of 9.1 at 7 am. Record low at Staunton since 1893 was 10 in 1967. yeah you guys have been really having some cold nights. I don't recall many single digits in Nov or even into most of Dec. Of course, last Christmas we were driving down on that day the massive cold front came through, and we arrived in Staunton to temps of 3-4F (and I believe it did get below 0F). It's a lot colder there than folks realize on winter nights. Link to comment Share on other sites More sharing options...
87storms Posted November 29, 2023 Share Posted November 29, 2023 This weather sucks. Looking forward to tomorrow's forecast. Link to comment Share on other sites More sharing options...
hstorm Posted November 29, 2023 Share Posted November 29, 2023 39.7/21.6 split today in Great Falls. Link to comment Share on other sites More sharing options...
WxUSAF Posted November 29, 2023 Share Posted November 29, 2023 On 11/28/2023 at 5:55 PM, WxUSAF said: If BWI has an average temp of 32 tomorrow (high of 40 low of 24), there were only a handful of colder days in the Nov 22-March 23 cold season. High of 40 and low of 23 at BWI today. Only 6 days in November 2022-March 2023 were as cold or colder by mean daily temperature. 6 1 Link to comment Share on other sites More sharing options...
CAPE Posted November 30, 2023 Share Posted November 30, 2023 High of 37 after a low of 21. Need more days like the last 2. 3 Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted November 30, 2023 Share Posted November 30, 2023 Currently: 28.5 High of 41.5 Low of 23.5 Link to comment Share on other sites More sharing options...
WEATHER53 Posted November 30, 2023 Share Posted November 30, 2023 10 hours ago, WEATHER53 said: 24 for a low and now 37 42 High Link to comment Share on other sites More sharing options...
weatherCCB Posted November 30, 2023 Share Posted November 30, 2023 Low of 23 Link to comment Share on other sites More sharing options...
SnowtoRain Posted November 30, 2023 Share Posted November 30, 2023 22.1 Link to comment Share on other sites More sharing options...
WVclimo Posted November 30, 2023 Share Posted November 30, 2023 Another morning in the teens. Low of 17. Link to comment Share on other sites More sharing options...
87storms Posted November 30, 2023 Share Posted November 30, 2023 Sneaky clouds across central md to start the day. Looks like they’ll lift out by noon, per satellite loop. Hoping to get some sun/milder temps in today. Link to comment Share on other sites More sharing options...
wxdude64 Posted November 30, 2023 Share Posted November 30, 2023 Had clouds overnight which I think held temps up a bit, currently 24.7/20.5. Link to comment Share on other sites More sharing options...
WxUSAF Posted November 30, 2023 Share Posted November 30, 2023 Low of 27. After yesterday, BWI is exactly “normal” on the month for temps and IAD, DCA and RIC are very slightly below normal (-0.1 - -0.3F). Today should end up slightly below normal temps as well. 3 Link to comment Share on other sites More sharing options...
aldie 22 Posted November 30, 2023 Share Posted November 30, 2023 It was 21 when i checked around 6am brrr Link to comment Share on other sites More sharing options...
Terpeast Posted November 30, 2023 Share Posted November 30, 2023 Low of 23 Link to comment Share on other sites More sharing options...
CAPE Posted November 30, 2023 Share Posted November 30, 2023 low of 22 Link to comment Share on other sites More sharing options...
hstorm Posted November 30, 2023 Share Posted November 30, 2023 26 for the low in Great Falls. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted November 30, 2023 Share Posted November 30, 2023 16 hours ago, WxUSAF said: High of 40 and low of 23 at BWI today. Only 6 days in November 2022-March 2023 were as cold or colder by mean daily temperature. Last year, 2022-2023, my COOP site RSTM2 recorded less than 12 nights below 25 degrees. We already have 4 this season. 1 Link to comment Share on other sites More sharing options...
TheClimateChanger Posted November 30, 2023 Share Posted November 30, 2023 RECORD WATCH: Calendar year snowfall ranks to date. IAD will attain the record with 1.4" or less snowfall in December, while PHL and MDT will attain records with 1.8" or less snowfall in December. Richmond and Norfolk can tie with no measurable snowfall in December. The record is already out at DCA as 2020 saw only 0.2" at that location. IAD [Least of 61 years] Full year record is 1.8 inches, set in 1998. DCA [5th least of 139 years] Full year record is 0.2 inches, set in 2020 - which has already been exceeded. Second place is 0.5 inches, set in 1998. RIC [Tied least of 116 years] Full year record is a trace, set in 1951. Norfolk, VA [Tied least of 128 years] Full year record is a trace set in 7 years, most recently in 2019. Harrisburg, PA [Least of 135 years] Full year record is 5.7 inches, set in 2006. Philadelphia, PA [3rd least of 139 years] Full year record is 2.1 inches, set in 1913. Link to comment Share on other sites More sharing options...
87storms Posted November 30, 2023 Share Posted November 30, 2023 Sun is out now, an unusual occurrence this week. Temps are climbing into the adequate range as well. Approval stamped. Link to comment Share on other sites More sharing options...
mattie g Posted November 30, 2023 Share Posted November 30, 2023 16 minutes ago, 87storms said: Sun is out now, an unusual occurrence this week. Temps are climbing into the adequate range as well. Approval stamped. 2 Link to comment Share on other sites More sharing options...
87storms Posted November 30, 2023 Share Posted November 30, 2023 We goin’ sizzler 1 Link to comment Share on other sites More sharing options...
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