WeatherShak Posted September 10, 2021 Share Posted September 10, 2021 With a few windows open, my house dropped to 69 inside. Glorious. ️ 2 Link to comment Share on other sites More sharing options...
weatherCCB Posted September 10, 2021 Share Posted September 10, 2021 Awesome outside 61/54 yeah, that ridge pattern forecast could be problematic if we see the tropics heat up. Either way 90s and high dews suck for September. 1 Link to comment Share on other sites More sharing options...
jonjon Posted September 10, 2021 Share Posted September 10, 2021 Its that time! Noticed substantial colors on the leaves today on Canaan Mountain. 6 Link to comment Share on other sites More sharing options...
VirgilCain Posted September 11, 2021 Share Posted September 11, 2021 Question - Looking at Sterling through radarscope - Are those migrating birds? Link to comment Share on other sites More sharing options...
nj2va Posted September 11, 2021 Share Posted September 11, 2021 48 for the low at Deep Creek. A beautiful morning here! 4 Link to comment Share on other sites More sharing options...
EastCoast NPZ Posted September 11, 2021 Share Posted September 11, 2021 Low of 50F. Yesterday was near perfect. 1 Link to comment Share on other sites More sharing options...
CAPE Posted September 11, 2021 Share Posted September 11, 2021 Mid 60s here for highs over the next 7 days with low 50s for lows, and showery early to mid week. Pretty typical, and very happy to miss the upcoming disgusting extended tropical mid Atlantic summer weather. 1 Link to comment Share on other sites More sharing options...
H2O Posted September 11, 2021 Share Posted September 11, 2021 So much for fake fall and back to summer for a few days. 1 Link to comment Share on other sites More sharing options...
MN Transplant Posted September 11, 2021 Share Posted September 11, 2021 16 hours ago, VirgilCain said: Question - Looking at Sterling through radarscope - Are those migrating birds? Hard to tell from a still image. "Clear air" echoes can be a variety of things, with bugs probably being the top culprit. The radar wavelength that the NWS radar are at (S-band, 10cm) are also sensitive to Bragg scattering from atmospheric eddies. At times, the radar beam can also be reflected back to the surface (anomalous propagation). 4 2 Link to comment Share on other sites More sharing options...
nw baltimore wx Posted September 12, 2021 Share Posted September 12, 2021 I like being schooled by @MN Transplant Link to comment Share on other sites More sharing options...
VirgilCain Posted September 12, 2021 Share Posted September 12, 2021 21 hours ago, MN Transplant said: Hard to tell from a still image. "Clear air" echoes can be a variety of things, with bugs probably being the top culprit. The radar wavelength that the NWS radar are at (S-band, 10cm) are also sensitive to Bragg scattering from atmospheric eddies. At times, the radar beam can also be reflected back to the surface (anomalous propagation). Thanks for the explanation! I've read that radar sites along the flyways often catch the movement at night during the spring and autumn migrations, but I wasn't sure if that's what I was looking at. Link to comment Share on other sites More sharing options...
mattie g Posted September 12, 2021 Share Posted September 12, 2021 Don’t mind me. I’m just here for the Bragg scattering and anomalous propagation discussion… Link to comment Share on other sites More sharing options...
WeatherShak Posted September 12, 2021 Share Posted September 12, 2021 Don’t mind me. I’m just here for the Bragg scattering and anomalous propagation discussion…Surely something else brought you to the September Discobs forum on this fine football Sunday afternoon? Link to comment Share on other sites More sharing options...
yoda Posted September 12, 2021 Share Posted September 12, 2021 Ugh... looks like warm and humid temps for the next 7-10 days... 85-90 and DPs in the 60s are just ugly in mid September Link to comment Share on other sites More sharing options...
frd Posted September 12, 2021 Share Posted September 12, 2021 2 hours ago, yoda said: Ugh... looks like warm and humid temps for the next 7-10 days... 85-90 and DPs in the 60s are just ugly in mid September Exactly, looks aweful ! September should be another August. Climo is getting warmer and warmer right before our eyes. 1 Link to comment Share on other sites More sharing options...
midatlanticweather Posted September 13, 2021 Share Posted September 13, 2021 Super Long range GFS had another taste of fall.. Lala land. Euro says.. Nope Link to comment Share on other sites More sharing options...
George BM Posted September 13, 2021 Author Share Posted September 13, 2021 21 minutes ago, midatlanticweather said: Super Long range GFS had another taste of fall.. Lala land. Euro says.. Nope Yeap. It shows the first digital <=540 dm 1000-500mb thickness values over the region since spring. #Soon Link to comment Share on other sites More sharing options...
nj2va Posted September 13, 2021 Share Posted September 13, 2021 6 hours ago, yoda said: Ugh... looks like warm and humid temps for the next 7-10 days... 85-90 and DPs in the 60s are just ugly in mid September September is still summer around here. #fallfeels don’t happen until October. 3 Link to comment Share on other sites More sharing options...
RDM Posted September 13, 2021 Share Posted September 13, 2021 Anyone else just hear what sounded like a large rumble of thunder? No t-storms in our general area. Checked out the Real Time Lightning map and there was a lone strike up near Gaithersburg, yet there's nothing on radar at all around here. Very strange. And no, I'm not hallucinating. Am up working on a report for work without any IPA induced altered state. Link to comment Share on other sites More sharing options...
weatherCCB Posted September 13, 2021 Share Posted September 13, 2021 Yeah I heard it. Some storms on radar now. Link to comment Share on other sites More sharing options...
weatherCCB Posted September 13, 2021 Share Posted September 13, 2021 Raining here now. Unexpected.. Link to comment Share on other sites More sharing options...
birdsofprey02 Posted September 13, 2021 Share Posted September 13, 2021 5 minutes ago, weatherCCB said: Raining here now. Unexpected.. Quick rain shower just woke me up too. Link to comment Share on other sites More sharing options...
RDM Posted September 13, 2021 Share Posted September 13, 2021 4 minutes ago, weatherCCB said: Raining here now. Unexpected.. Yea - I see the returns now. One little line/cell popped up moving east across MOCO. Were no returns at all when the rumble happened. Seems to be dying off as quickly as it popped up. Link to comment Share on other sites More sharing options...
George BM Posted September 13, 2021 Author Share Posted September 13, 2021 MLLRs are just a WEE bit on the steep side this morning. Now if it were two months earlier with a stronger sun-angle resulting in steeper LLLRs w/ sufficient lower-level moisture and there was a thunderstorm complex dropping southeast into the region, especially during a favorable time of day, then..... Link to comment Share on other sites More sharing options...
PrinceFrederickWx Posted September 13, 2021 Share Posted September 13, 2021 I just accept that met summer is now Jun 1 - Sept 30. I think BWI’s new 1991-2020 normal is almost two degrees warmer than 1981-2010 for September. 2 Link to comment Share on other sites More sharing options...
yoda Posted September 13, 2021 Share Posted September 13, 2021 2 hours ago, George BM said: MLLRs are just a WEE bit on the steep side this morning. Now if it were two months earlier with a stronger sun-angle resulting in steeper LLLRs w/ sufficient lower-level moisture and there was a thunderstorm complex dropping southeast into the region, especially during a favorable time of day, then..... Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 945 AM EDT Mon Sep 13 2021 .SYNOPSIS... High pressure will remain anchored offshore through much of the week. A backdoor cold front will approach from Pennsylvania tonight, then retreat northward as a warm front Tuesday. Low pressure may develop near the Carolina coast Thursday into Friday as a weakening cold front approaches from the Great Lakes. && .NEAR TERM /THROUGH TONIGHT/... Moderately to heavy dense smoke aloft will obscure skies today per latest HRRR vertically integrated smoke output. This will continue to impact sfc temperatures today and have undercut guidance for high temperatures today. Used the 10th percentile from the NBM. A strong elevated mixed layer with 700 mb temps near 13C was seen on the 13/12Z and 13/00Z IAD upper air launches, as well as on the 0555Z NUCAPS pass just offshore. Nearly 9 C/km in the elevated mixed layer is not a very common observation over the eastern U.S. However, the warmer low-levels will inhibit surface-based convection with 107 degrees temperatures necessary to achieve this. 2 Link to comment Share on other sites More sharing options...
North Balti Zen Posted September 13, 2021 Share Posted September 13, 2021 1 hour ago, PrinceFrederickWx said: I just accept that met summer is now Jun 1 - Sept 30. I think BWI’s new 1991-2020 normal is almost two degrees warmer than 1981-2010 for September. nods 1 Link to comment Share on other sites More sharing options...
toolsheds Posted September 13, 2021 Share Posted September 13, 2021 49 minutes ago, yoda said: Moderately to heavy dense smoke aloft will obscure skies today per latest HRRR vertically integrated smoke output. I noticed that there was a Haze out there making everything look Yellow. Also having really bad allergies this morning as well. Now I know why. Thanks @yoda Link to comment Share on other sites More sharing options...
GramaxRefugee Posted September 13, 2021 Share Posted September 13, 2021 1 hour ago, PrinceFrederickWx said: I just accept that met summer is now Jun 1 - Sept 30. I think BWI’s new 1991-2020 normal is almost two degrees warmer than 1981-2010 for September. 1.4 Link to comment Share on other sites More sharing options...
IronTy Posted September 13, 2021 Share Posted September 13, 2021 Just now, toolsheds said: I noticed that there was a Haze out there making everything look Yellow. Also having really bad allergies this morning as well. Now I know why. Thanks @yoda Sunrise this morning was epic, that must've been why. 2 Link to comment Share on other sites More sharing options...
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