October Discobs 2025

[WxUSAF]

5 minutes ago, Eskimo Joe said:

Normal freeze date for IAD isn't until November, IIRC.

IAD is actually like Oct 20? BWI around Nov 1 and DCA in mid January.

[Terpeast]

32 this morning, first freeze

[SnowenOutThere]

22 minutes ago, Eskimo Joe said:

Nice! Got sounding data to post?

Unfortunately I don’t think I’ll be able to get my hands on it. Though next semester when I’m in lab for the class I’ll have access to it and will use it to create a scew T diagram!

[CAPE]

High of 57. Been cloudy since mid afternoon. Currently 56.

[dailylurker]

There's been some epic fall mornings here in the lowlands the past several days. This weather has been amazing. 

[kgottwald]

4 hours ago, WxUSAF said:

IAD is actually like Oct 20? BWI around Nov 1 and DCA in mid January.

In 1993, IAD had a freeze on October 1. I was working a temp job in a building on Avion Parkway right next to the airport, and all the grass was white with frost.

[Eskimo Joe]

2 hours ago, kgottwald said:

In 1993, IAD had a freeze on October 1. I was working a temp job in a building on Avion Parkway right next to the airport, and all the grass was white with frost.

 

7 hours ago, WxUSAF said:

IAD is actually like Oct 20? BWI around Nov 1 and DCA in mid January.

Thank you for the info, IAD seems to be an ice box compared to the other climate sites.

[scope1]

Should be a fun night in the mountains of Washington State.  Perhaps they will get more snow tonight and tomorrow than what we will see in 2+ years.  I remember being up there in September a few years ago near Leavenworth, WA and there was snow/sleet with accumulation at some higher elevations.

[MN Transplant]

11 hours ago, Eskimo Joe said:

 

Thank you for the info, IAD seems to be an ice box compared to the other climate sites.

IAD is perfectly situated in a little shallow bowl which promotes cold air drainage on calm nights.  

https://www.heywhatsthat.com/profiler.html - very old website that I still find useful sometimes.  The change in color is at IAD, with a west to east profile.

 

[Eskimo Joe]

RSTM2 COOP site - had my first sub 60 degree high of the autumn yesterday. Got down to 36 last night, yet somehow our hibiscus on the deck is still pumping out blooms.

[astarck]

42 minutes ago, Eskimo Joe said:

RSTM2 COOP site - had my first sub 60 degree high f the autumn yesterday. Got down to 36 last night, yet somehow our hibiscus on the deck is still pumping out blooms.

Mine is doing the same. It’s going crazy with blooms so late.

[EastCoast NPZ]

Reached freezing for the first time this season.  Perfect weather weekend.

[wxdude64]

1 hour ago, Eskimo Joe said:

RSTM2 COOP site - had my first sub 60 degree high f the autumn yesterday. Got down to 36 last night, yet somehow our hibiscus on the deck is still pumping out blooms.

Last three days highs, 60, 56 and 57 yesterday. Next 7 days the forecast highs are between 49 and 56 and lows 36-40 with at least a chance of rain 5 of those 7, yep fall is here. Probably fire up the woodstove Monday or Tuesday for the first time. 

[mappy]

34 again this am. Parkton Mesonet low was 30

[IronTy]

1 hour ago, astarck said:

Mine is doing the same. It’s going crazy with blooms so late.

My Mandevilla vine is covered in flowers now.  Might bring it inside by the end of the week though.  

[kgottwald]

16 hours ago, Eskimo Joe said:

 

Thank you for the info, IAD seems to be an ice box compared to the other climate sites.

DCA's heat island has kept increasing. Their last subfreezing temp in October was in 1992; before that you have to go back to the famously cold October 1976, the prequel to the brutal winter of 1977.

[87storms]

The current satellite loop depicts us finally getting a high pressure to the north strong enough to allow for a system to actually move to the south.  Is this the start of a pattern change towards systems that produce more than NS shortwave-inspired broken lines of showers and remnant cloud slop?