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December 2025 Short/Medium Range Forecast Thread
Daniel Boone replied to John1122's topic in Tennessee Valley
Exactly. 2014 and 2015 had a dominant +NAO and we were cold and very Snowy. +TNH and PNA along with a parade of Systems continually riding up into Eastern Canada that kept pulling the cross polar flow southward instead of it typically getting pulled under the +NAO and into the NATL. -
Another bad post
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December 2025 Short/Medium Range Forecast Thread
Daniel Boone replied to John1122's topic in Tennessee Valley
Yeah. The Baja Cutoff is the Issue. If upstream blocking, 50-50 and -NAO were in place we could benefit from it as waves or impulses would travel eatestd from that Baja LP. But, as you alluded to that's not the Case. -
I think the pattern finally starts to turn significantly colder/stormier towards the end of the month into early December. Model ensembles are pretty strongly hinting at this. You're definitely right that a lot of heat/dry records have been set in recent years, but...let's not be too prisoner of the moment. - Denver's driest year was way back in 1954 - Hottest temp of 105 was first recorded in the late 1800s and was tied in 2005 and 2012 but has not been touched since - Boulder's snowiest winter on record was 2019-20 - Denver's warmest year on record was 1981 So it could be worse. Also, there have been some impressive winter cold waves in the past decade or so. - two separate very cold waves in Feb 2025, the second which delivered a 12/-7 day on 2/19, about as cold as it gets that late in the season (though topped by an even more impressive event below) - DEN fell to -19 in the Jan 2024 cold wave. That was the coldest Jan temp since 1984. - Dec 2022 featured a -6/-24 day. That was the coldest max temp since 1990, the third coldest on record (-9 is coldest), and the low was one degree off the coldest temp recorded in the airport era (-25) - That was followed by a top tier blast in late Feb 2023, featuring a 7/-11 day at DEN on 2/23. The -11 broke the daily record by 11 degrees, and was the second latest a temp that cold had ever occurred - Feb 2021, another record-breaking cold wave. On Valentine's Day, DEN was 1/-14. That was followed by a low of -16 the next morning. The high was the coldest that late since 1962, and same for the low of -16.
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2025-2026 ENSO
brooklynwx99 replied to 40/70 Benchmark's topic in Weather Forecasting and Discussion
can you post some ensembles to back up your point? or just anything, really -
Don’t worry, you get used to it. more about the seasons vs specific days ie warm spring vs dry and warm winter
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Latest Euro Weeklies for the period just beyond D15 on based on the 0z ens run. The progression of anomalous h5 heights into the NAO domain is more impressive than the previous run.
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It's just pure hopium at this point. I don't see anything to be positive about. SE ridge looks pretty dominant and cold dumps west with troughing So cold/dry to warm/wet and vice versa will be the theme. Same storm tracks we've been seeing for years now
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SSWs or wave reflection events don’t automatically mean cold and wintry conditions around our area. Plus the sample size of December SSW events since the late 80s is very small at only three years during La Nina’s .Those three didn’t really do much for us. Hopefully, we can see some improvement over those limited past early cases. Even if the RMMs eventually make it into phase 8, the VP charts still have convection lingering near the Maritime Continent. Doesn’t take much convection there in concert with the gradient between Siberia and the mid latitude WPAC warm poll to enhance the Pacific Jet. The faster Pacific Jet has resulted in the dominant Great Lakes cutter, l-78 to I-84 hugger, and suppressed Southern Stream storm tracks since 2018-2019 when the mid-latitude WPAC Pacific became warm. So when we have had troughs in the East during recent years, they usually got pulled in behind a departing Great Lakes cutters or hugger tracks. Then we went cold and dry for a while the Southern Stream got suppressed. Then the Southeast ridge has usually rebounded with more cutters and huggers.
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Hays County where I reside, been dropped from the flood watch. It's done. We transition to the Pacific air mass with little to no rain as the central Texan Gobi Desert continues to develop unopposed by significant precip amid the Nina. I knew it all along. Texas is transitioning to a much drier climate even as millions of legal people rapidly move in as more and more businesses come to Austin. One day very soon, WATER will be nearly as expensive as GOLD down here. 1) Wells dry up. 2) No water at all. 3) Water has to be paid for and Austin is already using up the Colorado River so water will need to be piped in from the Pac Northwest. It's gonnabe PRICEY. 4) Wealthy folks will move out, to moister places like New Orleans. I'd love that place, rain all the time and one hell of a nightlife, I'd do things that'd make RavensRule blush with total embarrassment! I am most assuredly, NOT conservative no more! I am going to do stuff in late life that will make Solomon of old's late life look like one of Billy Graham's sons.
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November 2025 general discussions and probable topic derailings ...
Ginx snewx replied to Typhoon Tip's topic in New England
Tell me what you think about your situation Complication, aggravation Is getting to you The Sunshine scares the daylights out of me. -
There are no absolutes, definites or guarantees in weather. You, me or anyone else can’t guarantee MJO phase 8, a SSW or that December is going to be cold on November 20th. If I made a post like that saying it’s going to be warm you would have jumped all over me
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November 2025 general discussions and probable topic derailings ...
alex replied to Typhoon Tip's topic in New England
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I must be getting old I can't remember what happened here lol
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White Christmas here last year. First in a long time.
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would be nice to see a snowier December during the holidays! Last yr had some cold but it was dry as was the whole winter
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November 2025 general discussions and probable topic derailings ...
alex replied to Typhoon Tip's topic in New England
Dammit! Was working earlier. I’m new to Twitch, I’ll have to figure out what went wrong -
I would say both posts suggesting I cool my jets are mostly just excuse making about the accuracy and statements that we should just accept it and don’t complain. Models cover all the bases. Thats how they are scored for funding. So the status quo is content. I see no serious improvement over the last 20 years. I believe they try to do too much, like using a microscope for very close up inspection rather than a more backed off binoculars approach. Between now and Christmas Day we will see everything from 30 and snow to 60 and sun for Christmas Day. That’s not science, that’s cover all bases guesswork
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I mean how many damn years lately have we been stuck with La Nina too?
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It's something we should be watching closely. The SSWE is imminent. Considering a typical 10-30-day lag, I suspect that the December 10-25 period might see the coldest anomalies relative to normal for such cities as Chicago, New York, and Philadelphia. That's still far out and we'll have to see how things evolve (does the PV split, where do the twin vortices wind up, etc.).
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I used to be hopeful but after the last 9 years I can say unlike Justin Berk, I do not have faith in the flakes haha.
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Bottom 3 most likely
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https://www.meteonetwork.it/models/mjo/ I recommend Paul Roundy's site as well. You can look at the MJO in different portions of each month based off research. Both phases 7 & 8 have their best responses in weeks 3&4 of DEC https://www.atmos.albany.edu/facstaff/roundy/waves/rmmcyc/index200reg.html
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What is the website for these ENSO based MJO plot composites. Thanks in advance
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You are getting a MJO phase 8 with a SSW. Thats a cold wintry signal. December is going to be cold and to think we didn't need a volcano for that to happen. Many people are cautious which is fine but there are signals out there that the MJO will be going into 8.
