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wawarriors4

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Posts posted by wawarriors4

  1. LWX AFD
    
    Dramatic shifts in guidance over the past 12 hours for a
    potential snowstorm tonight through midday Monday for the 
    southern half of our CWA, bisecting very close to the major 
    metropolitan areas. 
    
    Digging H5 trough over the southern plains will amplify today,
    cut-off an upper low tonight over the Carolinas, then go 
    negative tilt as it crosses the mid-Atlantic coast Monday 
    morning. The reflection at the surface will be the development 
    of low pressure, rapidly deepening and tightening tonight over 
    the southeast US to a position over Cape Hatteras by daybreak
    Monday. At the same time, cold Canadian air will quickly filter
    in aloft, bringing H85 temps well below 0C for much of the 
    entire CWA by 12Z Monday. 
    
    00Z GFS, ECMWF, NAM all have at least advisory level snowfall 
    accumulations essentially south of I-66/US-50. 05Z NBM, which 
    was followed closely in development of snowfall accumulations 
    this morning, dampens the largest snowfall contributor -- the 
    GFS, and splits the difference between that model and the 
    lesser accumulating NAM. Because of the large variations and
    the dramatic shift in guidance, advisories have been issued west
    of I-95 where the precipitation onset will start shortly after
    midnight tonight, and watches issued along and E of I-95. There
    will be a tight gradient of snowfall accumulation north of the
    Nation's Capital, and potential warnings and advisories will
    most certainly be modified as guidance hopefully converges with
    a solution over the next 12 hours.
    
    The most likely snowfall forecast should be used with caution,
    with probabilities of higher amounts, towards the 90th 
    percentile, should strongly be considered for planning 
    purposes. Please continue to check back as we modify this
    forecast in the coming hours.
    

     

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    • Weenie 1
  2. 0.00” yesterday and 0.18” for the week and 1.76” for month so far….grass is crunchy. Feels like storms just dissipate or move just South through Spotsy rather than over my yard just NW of FXBG 

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