Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

Latest Breaking News

BumRushDaShow

(164,811 posts)

2. As a weather hobbyist

Reply to progree (Reply #1)

Mon Dec 15, 2025, 08:38 AM

Yesterday

what happens with the PV is that it can break apart and spin off "lobes" of cold air into various regions around the world, and can also undergo what is called a "SSW" ( "Sudden Stratospheric Warming" ), which can also help break off pieces.

Here is a long-range forecast article from September (9/12/25), about what is happening right now - Polar Vortex breaks apart, sends frigid Arctic cold across Canada and the U.S.

(the article also includes a summary of what the PV is and the dynamics of it)

I like that site for predictions of SSWs as well.

Sunrises keep getting later and later until about January 2.

I don't know why, I think it has to do with earth's elliptical orbit.

It's related to the Earth's tilt (archived from the now-purged "climate.gov" )

Edit history

Please sign in to view edit histories.

Recommendations

2 members have recommended this reply (displayed in chronological order):

GrapesOfWrath Dakotacrat

4 replies

= new reply since forum marked as read

Highlight:

Fifth La Nina in Six Years to Disrupt Crops and Supply Chains [View all] BumRushDaShow Sunday OP

Oh no, La Nina means polar vortexes shifting south in the Midwest, more snow progree Yesterday #1

As a weather hobbyist BumRushDaShow Yesterday #2

All's I see at this link is this -- progree Yesterday #3

Equation of time. Igel 21 hrs ago #4