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  1. Ok kids, preseason is over. Winter is here
  2. "Fate often spares an undoomed man, if his courage is good." --Beowulf, Book VIII, lines 572-3. Models seem set on a Gulf low with a banana High. The beginning of the storm over TX is in NAM range (stronger and further south with the High).Can we get the mid levels to wobble in just the right way? The WPC gives us all we could ask for at the surface at Day 4 in December, whatever ends up happening: EDIT to add in the end of the KMRX discussion this AM: "At this range some of the details are unclear, but it does look as if the potential for wintry precipitation Friday night and through much of the weekend is possible/probable. Details on ptype timing/transition and precipitation totals will become more clear over the upcoming days as this system is still over the Pacific and not being observed in the RAOB network at this time."
  3. See obs in the storm thread, so we need an obs thread. Snow has fallen in various parts of the forum today, especially Western areas. Hopefully the 12z models are at the correct solution and this is a thread and obs archive I'm reading during hot summer days. Currently imby 38 degrees, dp 31.
  4. Rain, sleet, snow, thunderstorms, regional climate, jet stream, La Niña, El Niño, polar vortex, ice pack, ETC. anything that can have an affect on the two seasons in question is up for analysis and debate. Our forum is one of the best at informing and teaching people as well as conversing with friends. Let’s try to keep that going with this thread, and don’t forget a lot of people come to our threads just to learn. As we have some very talented professional and novice Mets on our board. Let the speculation begin!
  5. I just realized that we need an observation thread for Fall. With the remnants of Flo approaching, though it might not be a bad idea to get the Fall obs thread rolling. What is left of Florence looks like it might be a rainmaker(within norms) for the eastern Valley. Wind advisories are hoisted for the mountains. Western NC is under a flood watch. Rivers that flow from NC such as the French Broad and Nolichucky may flood in TN due to rain in North Carolina.
  6. First storm tracking of the season. Let’s hope we all get some snow out of this.
  7. Winter weather advisories are up for the Western Valley, from Eastern Arkansas, West Tennessee, Northern Miss and SW Kentucky. Ice should develop overnight in these areas and transition to snow by tomorrow night. 1-4 inches look likely across most of the Western Valley with isolated spots possibly going higher. Per Memphis NWS the area will spend 48 hours below freezing just above the surface with surface temps struggling to rise above freezing. Very impressive event for any month there, let alone mid-November. There is also a chance of some brief freezing precip in the far NE Valley, though that may be contained to Western North Carolina.
  8. I could see how Cape Cod could end up with more snow from both systems than say Springfield MA if the coastal storm on Wednesday takes a more southeasterly path
  9. My next post is about the potential snows from Saturday evening through Thursday morning. Models are in general agreement that the potentials for Ocean Effect Snow from Sunday through Tuesday and then storm produced snows from Wednesday through Thursday due to a coastal storm is on the table. However, this post will solely focus on the Ocean Effect Snow potentials. First is the event Sunday through Monday. Mesoscale WRF-NMM and WRF-ARW both support a single band of ocean effect snowfall impacting the region of Cape Cod from Hyannis to Chatham and Provincetown on Northerly winds from 900mb to the surface, which means a single convergence band is more likely than multiple bands of snow which are less intense. These two models keep the band over this region from about 12z Sunday to 00z Monday or later, that is at least 12 hours or more of heavy snowfall over this area of the outer cape, this could produce more than 6" of snow, we will have to see the next few runs until the event starts and then diagnose the real short range models and what they produce. For now the potential exists of a few inches to as much as 6" or more over the Outer Cape Cod area. Stay tuned!
  10. Latest NAM run 00z shows a strong potential for ocean effect snow event from the Cape Cod Canal eastward to Provincetown on northerly winds, also unidirectional wind flow from 900mb to the surface indicates a single band event is probable along with a strong instability burst from 850mb to surface ocean temperature differential (Delta Ts) of 18-20C which is sufficient enough to produce heavy snows over the Cape and Islands. Also the flow is stronger than 10mph which should be sufficient enough for consistent band developing as we transition into a clipper low for the next few days. Big storm potential if the clipper low slows down its movement like the latest 12z guidance suggests at H5 with the low developing and closing off the H5 flow over the Northeast US. This will prolong the snow chances from Sunday morning to Wednesday afternoon for overall snow chances. Stay tuned!
  11. The forecast for snow and cold looks dim the next 10 days, however beyond that time period, looks to the first real chance at a snowy and cold regime over New England and at least as far south as the 38N latitude line. Anyone south of that latitude needs to wait until further into January time frame, but for those of us north of that latitude, the pattern change is being seen by most of the guidance after day 7-9 time frame, it looks like after December 4th an arctic front swings through the Northeastern USA states and brings a return of true arctic air and snow could be a possibility. Stay tuned! Right now it looks like a 60% chance at seeing at least 2 snowstorms, while a 40% chance exists that we see suppression depression.
  12. SO the models are showing frigid air entering the northern Plains sometime in the next ten days and that cold air filters into the eastern US by day 13-16, which is the 27th and beyond of October. We could be seeing a change to much colder air eventually as winter gets closer. Most of our storms this winter will be from the Oh Valley to the Mid Atlantic coastal storm tracks, signifying that miller Bs and not Miller As will be the normalcy this winter.
  13. Here is a snowfall map that I created using reports from various sources. Many of the reports came from this forum and the National Weather Service. Only social media reports that passed through quality control were considered. All reports gathered were carefully considered and compared before being included. Light rain developed during the morning hours on November 26th and mixed with some sleet inland. Wet snow initially confined to the far northwestern corner of the state. As steadier precipitation moved in, a slight southeast shift of the snow/sleet line was observed with some modest evaporational cooling. However, much of coastal and southeastern Connecticut stayed predominantly rain. The main reason for the mixed precipitation and sleet was a warm layer in the atmosphere around 700mb. As precipitation became heavy, sleet fell across much of central Connecticut. Wet snow continued across northwestern Connecticut and rain moved as far northwest as Meriden and Hartford with some warming aloft nudging into the valleys. Even in those areas, the 2-meter temperature hovered around 34 degrees for much of the event, which did not allow for significant amounts of snow to accumulate. Precipitation tapered off to scattered snow showers by early evening. As cooler air gradually funneled in, a light additional accumulation of snow was reported in many areas. A few broken, but locally enhanced bands of snow continued into the early morning hours on the 27th. The greatest snowfall totals were in the range of 6 to 10 inches across northwestern Connecticut. Totals dropped off fairly quickly to the south and east. A narrow area of 3 to 6 inches was observed near and just northwest of I-84. Just southeast of there, 1 to 3 inches was reported and the southeastern third of the state generally saw less than one inch of snow. Where the snow did accumulate, it had a very high water content, especially those areas that battled between a mixture of snow, sleet and rain.
  14. Here is a snowfall map that I created using reports from various sources. Many of the reports came from this forum and the National Weather Service. Only social media reports that passed through quality control were considered. All reports gathered were carefully considered and compared before being included. Light rain, with light snow across the higher elevations, developed across Connecticut during the evening hours of November 13th. The steadiest and heaviest snow fell around midnight and tapered off during the pre-dawn hours on November 14th. Most locations eventually changed to snow, with the exception being the immediate shoreline and urban coastal corridor from New Haven down toward the New York border. On average, the hills saw anywhere from 1 to 3 inches of snow, with generally an inch or less across the valleys and shoreline. The highest amounts around and just over 3 inches were reported in Litchfield County.
  15. Actually, this is more of a test image. Just checking out the system, timing, ease of use, etc.

    © Stormitecture, Jason Foster

  16. While still being a day 5ish event, it is not to early to start looking at some of the possible implications of various models. At this juncture, we generally have the GFS and the Euro book-ending a possibilities window that includes a cutter to Chicago and a more suppressed system that goes East of Hatteras For the most part been consistently left of the GFS ... with its ensembles a tad to the right of the operational Euro (but no where near the GFS). The 12z GFS Ensembles cut the difference with somewhat of a middle ground ... bringing the primary low into Ohio, with a coastal transfer. Depending on the amount of moisture return that is achieved in the warm sector, the operational GFS could be a notable severe weather event. And would keep QPF amounts across the DC/NOVA area on the light side with little possibilities for winter weather. The transfer with this solution simply happens too late to provide the lift for precipitation and wraparound of cold air. Then we have the Euro with it's more southern solution. It would mean a smaller spatial window for severe weather possibilities and a better chance for wintry weather for the area (especially west ... like we saw with the early March event). Given the time range and the placement of the the ensembles in the middle of the operationals I would expect to see some compromise towards the middle in terms of track over the next 1-3 days ... rather than an extreme on either side verifying. If I had to pick a solution verbatim from this mornings 12z suite for the heck of it, it would be the GEFS.
  17. Ian

    Yup

    From the album: Stuff

    © Ian Livingston

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