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summer blizzard

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Posts posted by summer blizzard

  1. This is Sandy upon NJ landfall, to the left of the circulation (Maryland) is the warm-core of Sandy soon to be extinguished by the cut-off from the ocean. And to the right (New Jersey) is the cold-core, the developing 'Nor-Easter which took advantage of the 'cane.

    post-8763-0-26914500-1351597200_thumb.jp

    Thats not how it works, especially since the storm was travelling NW and NE at this point.

    That was simply what remained of the eye undergoing extra-tropical transition, in my opinion there is a case for it to have been declared sub-tropical about 36 hours ago given the storms structure.

    Well, I believe it was one of their weather reporters/forecasters that was on the news 24 channel spouting forth this info.

    I suspect that like their reviews of 1987 they simply don't want to confuse the viewer by explaining the various requirements.

    Apparently they are 'discouraged' to mention anything like the Jet Stream as it would turn off the average viewer.

  2. THE CONVECTIVE STRUCTURE OF SANDY HAS DETERIORATED TODAY...EVEN AS

    THE CENTRAL PRESSURE HAS CONTINUED TO SLOWLY FALL...SUGGESTING THAT

    THE CONVECTION IS NO LONGER DRIVING THE BUS. THE INTENSIFICATION

    OBSERVED THIS MORNING WAS ASSOCIATED WITH STRONG WINDS OCCURRING TO

    THE SOUTHWEST OF THE CENTER...OUTSIDE OF THE CENTRAL CORE...AND WAS

    ALMOST CERTAINLY DUE TO BAROCLINIC FORCING. IN ADDITION...AIRCRAFT

    DATA INDICATE THAT THERE ARE STRONG TEMPERATURE CONTRASTS VERY NEAR

    A MODEST RESIDUAL WARM CORE. WATER VAPOR IMAGERY INDICATES THAT

    SANDY IS BECOMING ABSORBED WITHIN A LARGE MID-LATITUDE CYCLONIC

    CIRCULATION. ALL OF THESE CONSIDERATIONS LEAD US TO CONCLUDE THAT

    THE MOST APPROPRIATE CLASSIFICATION AT ADVISORY TIME IS

    EXTRATROPICAL. HOWEVER...FOR CONTINUITY OF SERVICE NHC WILL

    CONTINUE TO ISSUE ADVISORIES THROUGH LANDFALL. A POST-STORM

    ANALYSIS WILL RE-EXAMINE THE TIMING OF EXTRATROPICAL TRANSITION.

  3. I really hope Sandy, as an extra-tropical storm will go across the atlantic and slam britain with winds upto 80-90mph and 100mph over high ground. It also may bring much colder weather behind it. It may happen next week. I maybe wrong though.

    It prob arrive over here around next tuesday or wednesday. not this week, next week. It is a one to watch and it is quite a threat to us too. behind it will be north to northwesterly winds and it may bring snow to north-west england.

    It's not coming here at all.

  4. Exactly the same experience I have even dating back to the old BBC Snow-watch days

    I can only assume it was simply the greater range of data available that produced this belief (a belief that I too held during the years you mention)

    SK

    I started on there.

    I suspect it may have verified better in winter when those winters were full of shortwaves which the GFS does best on, it may be that simply ignored what went on outside winter for the most part.

  5. While we're talking which model is better than the other:

    0z's @ Day 6:

    http://www.emc.ncep....0_G2NHX_00Z.png

    1. ECMWF

    2. GFS

    3. UKMO

    4. GEM

    5. NOGAPS

    12z's @ Day 6:

    http://www.emc.ncep....0_G2NHX_12Z.png

    1. ECMWF

    2. GFS

    3. UKMO

    4. GEM

    5. JMA

    6. NOGAPS

    The ECMWF remains supreme at this range.

    In terms of 0z vs 12z, the 0z's are correlating far better than the 12z's, perhaps suggesting that we should be paying more attention to the overnight runs. For example, both the GFS and UKMO are proving 5% more accurate in their 0z runs, and even ECMWF is at 2%.

    Over a longer period of time:

    http://www.emc.ncep....H500mb_day6.png

    You can see that even as far back as 2000, the ECMWF has consistently remained the most accurate performer at day 6. The Ranking over the last year is as follows:

    1. ECMWF

    2. UKMO

    3. GFS

    4. GEM

    5. NOGAPS

    (note as this data is only available from the 0z runs, the JMA cannot be compared)

    So two conclusions I personally draw from a data perspective:

    1. ECMWF remains king, and has done for some time.

    2. 0z runs should be taken more seriously perhaps than 12z runs for day 6 projections

    3. GFS/UKMO seem fairly interchangeable for the position of runner up, and, to my mind, should perhaps be considered =2nd

    SK

    Very surprising, i joined in 04 and right upto 07 the consensus was that GFS was superior.

  6. post-15601-0-72565700-1351204509_thumb.g post-15601-0-92874200-1351204510_thumb.gpost-15601-0-44466600-1351204512_thumb.g post-15601-0-94042800-1351204511_thumb.g

    Just comparing 2010 to 2012

    In 2010 there seemed to be the perfect set up now leading into winter for the UK getting early snow with incoming snow taking a high and focused move from Siberia then Russia and into Scandinavia etc

    It looks that already 2012 is a little behind that and the shape is looking like its more flatter rather than pointing at Finland, so will be interesting how that is shaping up over the next week.

    Iceland has got a good covering of snow compared to yesterday and more due over the next 7 days, http://www.yr.no/pla...eyri/long.html

    so its looking more 2010 again some very cold temps tonight inc http://weather.glads...y.net/site/BIAR

    If the snow heads early for New York,Oslo and Reykjavik I'm thinking we would be unlucky to have to wait till after Xmas for a decent UK covering.

    The US and Canada had a very poor winter for snow last year, well it looks like it has a chance this one!

    There are lots of ways to have a winter but a weather child of winter 2010 would please a few people i think.

    2012 is much better, a much more solid snowpack and more in Canada.

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