wdrag
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Of interest to me. Steepening lapse rates late Sunday with the CFP, and isobar hints of a weak inverted trough back from the Atlantic back into NJ, could bring small areas 1/2-1" snows to NJ/e PA. Also RGEM picking up on WAA small 1/4-2" snow acc down through the sub forum late on the 24th. Which is it, if either? I know we're all interested in next weekend... but the short term might provide a freshening bit of happiness to some parts of subforum landscape? It is cold and I'll take what we can get in this currently cold pattern.
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So here's what has happened the past 24 hours ending around 8A snowfall wise. Three CoCoRaHs graphics. Click each for detail if interested. Massachusetts south shore (Ocean effect due to storm circulation) Wildwood area down to se DE on northern fringe of the synoptic snowfall. Jackpot for e NC snowfall.
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Added RMOP: This can be helpful. Use the legend. Reds are high probability of being correct heights, blues indicate lots of uncertainty with respect to predictability. Added the 00z/22 GEFS trough for next weekend... big trough se USA but questionable ne USA heights (is it deeper, or splits east?) And the 360 hour which show confidence of the overall GEFS look at the pattern 16 day in advance. Use carefully but I don't see a big 2+ day torch yet...coming I'm sure since all of our long rangers are confident, but is it Feb week one (i dont think that is likely but may be a bad read on part--others chime the science on response to retrograde)? Week two: better chance of significant warming.
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Part one of the 4 day thread: So we know it snowed 4 hours in Wildwood of extreme southern NJ overnight, and that the Boston area is picking up accumulative ocean effect snow showers, with one CoCoRaHs report of about 5" along the south shore. I'll add the CoCoRaHs mapped reports from this morning at about 10A for a summary on the part one failed for us ECWS. Part two seems to be gaining a little MINOR traction, from either scattered snow showers late Sunday (rain/wet snow LI), or a possible general light snow late Monday-Tuesday more likely for the I84 corridor, but possibly extending down to I80. Recommend following up here for this part two, if and as needed the next 2 days. Will adjust thread title slightly by 730A.
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You all have it covered: Not threading yet til I see GGEM-GFS-EC give us some agreement.
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I saw some complaints about delays/cancels. While cancels seem a little severe for what was indicated yesterday, I definitely think delays were warranted for any community with buses traveling steep hills (like Sussex County NJ)... I work for the county and am familiar with travel here. It's difficult in snow that is sticking. Here are the CoCoRaHs reports from yesterday...a disappointment, especially via the SPC HREF, HRRR, NAM (I saw the positive comment on the RGEM). In this situation, there was a cold model bias in the USA modeling the BL and we lost probably 2-3 hours of snow of the expected 6. That's the difference between a good model forecast and mediocre. If interested, please click the graphics for greater clarity.
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So, In summary, presuming we have a grazer across outran Cape May County overnight... we will have missed a pretty good storm by around 160 miles. This is similar or slightly better than a D5 NHC forecast error. At least we knew we were in the NW fringe per the initial WPC D5-6 prediction which pretty much nailed the centroid, albeit with only 30-49% pops of 3"+ snow. See the initial thread issued 1101A/16. 23-24 probably restricted to e PA/NYS. Monitoring for spotty SW- but not looking anything decent.
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If we get any more threadable events the remainder of Jan (25-26? 29-31?) it will have to have GGEM support. Tough to beat the conservative GGEM. Keeping an eye on things.
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In the meantime, MEX MOS is a little weak on the intensity of the cold NYC, already at least 2F too warm NYC and may be in error by 4F by 8A today. Tonight should colder NYC. Possibly?? the coldest of the season NYC Thu the 27th? And I see the potential easing of the cold in early Feb but until the ridge disappears AK, we still have pretty sizable source of cold enough air early Feb to spread into the region I80 north, as I see it. Big se USA ridge could come earlier but for now, it's not there, at least as far as I can tell.
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Will try and post 2 days snow totals (small) Friday evening. No other comments from myself on anything future or currently threaded til either 830P this eve or sometime Friday. Holding 29F here in Wantage at 1241P. I just checked HPC HREF (12z/20 version) and it still is too high for today. Don't think most modeling grabbed the essence of 33F+during the day minimizing snow accumulations further than what it was doing.
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Thanks for your reply... helpful. Walt
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Wantage NJ final here in the south part at 740'MSL. 0.7" 28F
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MOS guidance is warm...16F so I don't spend a lot of timing deciding what it will be. But to have MOS off by more than 6F on the cold side of a CAA situation seems a little much so that is why I decline to be confidence of below 10. You need a snow cover in CP... unsure if more than 1/2"???
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Wantage 0.6" at 9A and 1.5S-. 27F. roads wet to slightly covered red, all other surfaces nice freshener.
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Tonga vs Pinatubo: Climate cooling response unlikely per this article. https://www.space.com/tonga-volcano-eruption-wont-cool-climate
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Is anyone discussing the possible coldest temp of the season so far in NYC Saturday morning (maybe 8 or 9 above) and wind chills 5-10 below there, 15 below out here in Wantage My guess the only things rueing against, is if NYC doesn't gain an inch of snow today and the southern system makes a sudden move north (not likely) I also see the modeling trending warmer early Feb, but time for delays?? Feb 5-7 seems to be big time frame for BOS snows...
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Snowstorm (for them pretty good sized) eastern Carolinas/se VA, maybe DE with Cape May NJ on the possible grazer northern fringe Fri afternoon early Sat. So this escaped south of us. Close doesn't cut it but we knew from the headline it wasn't a lock. Still going to be interesting to monitor. In the meantime, to replace it Sat morning, possibly NYC coldest temp of the season so far?? 24th?? nothing yet, and so this thread may be a miss of us, a hit only to our southern mid-Atlantic.
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Wantage NJ 29F and 0.2" so far with a 1S-. should end here around 10A, NYC Noon-1P (once it changes to snow there). Treated roads just wet here, all other surfaces covered nicely.
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Later start and shorter duration of snow (maybe 4 hours... amounts less, I84 corridor probably less than 1". NYC-PHL probably doesn't start snowing til 830-9A and sticking in the urban streets may be difficult due to temps still only near freezing during the snow. Will help if there is a burst of moderate snow. I'll give it a 1/2-2" range. Just changed to flurries here at 605A but temp still 34.5. too warm too long and lots of warmth to flush out toward I95. We probably had our CFP around 445A.
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Well, in part because it is technically correct as ANA. But my take on science is try to simplify into language that cost of us understand. There is also lots of met technics that are beyond my clear understanding, that re purportedly better than old school. Fortunately old school still works. So, arctic cold front snow can work... (myself I likely to reserve arctic for 0F cold in NYC). However, I flex to not lose a persons interest. Back tonight.
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I know the violins and singing bye-bye OTS are close at hand, if not already pronounced by the weather ME (medical examiners): but below is why I cannot yet pronounce this gone. Note the spaghetti on the right panel for the time shown-18z/Saturday/22. The mean flow is less that 100% confident. MANY members of the 06z/19 have a hang back circulation that could mean a little later development and a more northward push if they verify. I think our NAM/RGEM will be onto this by the 07z/20 cycle tomorrow morning if the hang back verifies. If not: the orchestra plays. Click the graphic to get a better view, if interested. My last on this, probably til Thursday morning. Have a day.
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Yes...that looks correct. best should near I95 westward. My last post til this evening. What i do from this time forward is use the SPC HREF meanssnowfall...axis should be very good. It will be available by 11A. and of course the HRRR 12z and 18z versions. Have a great day! Let's look forward to an even nicer looking landscape tomorrow morning. The evening visit will start the OBS-NOWcast of this thread, probably a straight conversion of this one. Also, for the many of us who do not use the term ana front, katafront. One reason i don't is that its a bit confusing. In my opinion, I view the ANAfront as a warm front...(despite its cold front southward passage) frequently will be a wave of pressure falls rippling along it to generate the qpf.
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Try... not all work out. I still haven't given up on 1/21-24. Something has to happen here.
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