Jump to content
  • Member Statistics

    17,606
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

February 4th-6th Storm Threat Discussion


Sn0waddict

Recommended Posts

  • Replies 1.2k
  • Created
  • Last Reply

The GFS MOS shows 33 or so for LGA til 15z (again it shows 33/22 at the start so its missing evaporative cooling)...the NAM MOS is actually warmer at most stations, thats rare for these sort of events, so perhaps Taunton's idea is correct...if the NAM even was close to the GFS/Euro it likely would be showing temps near 29-30 for NYC til mid morning.

Link to comment
Share on other sites

Looking at all models, my forecast would be:

 

S/E of Rt. 1 in NJ, SI, and Southern Half of LI: C-1" Snow/Sleet, minimal ice, then cold rain

Between Rt. 1 in NJ - Rt. 78 (Eastern Somerset & East), NNJ East of PKWY, NYC, Northern Half of LI: C-2" Snow/Sleet, some ice, ending as cold rain

Western Somerset in NJ/Rt.78 to Rt. 80 W of Parkway: 1-3" Snow/Sleet, ice, then maybe ending as cold rain

N of 80/E of 287: 2-3" Snow/Sleet, ice, maybe ending as drizzle

N of 80/W of 287: 3-5" Snow/Sleet, then ice

Link to comment
Share on other sites

At this time, I still don't buy the NAM's near "no snow" solution for NYC, southern Westchester/southern Fairfield counties and Long Island. My preference remains the combination of the ECMWF, GFS, and RGEM. Indeed, if one takes a look at the 15z HRRR model, one finds that guidance forecasting snow to break out across southern Pennsylvania at 15 hours in an area in which the NAM forecasts no snow.

 

This seems to be a case where the NAM is blasting the warm air into the mid-levels of the atmosphere (700 mb-900 mb) too aggressively. If so, this would not be a rare case in which it misses a thumping of snow prior to the changeover.

 

In short, my guess is that much of the NYC Metro Area will likely see 2"-4" of snow with a few higher amounts, similar amounts in Newark, 1"-3" on Long Island's South Shore/2"-4" on Long Island's North Shore, and 3"-6" in much of southern Westchester and Fairfield Counties.

Link to comment
Share on other sites

The GFS MOS shows 33 or so for LGA til 15z (again it shows 33/22 at the start so its missing evaporative cooling)...the NAM MOS is actually warmer at most stations, thats rare for these sort of events, so perhaps Taunton's idea is correct...if the NAM even was close to the GFS/Euro it likely would be showing temps near 29-30 for NYC til mid morning.

 

It's funny to see the NAM dismissed for being too warm. It's usually too cold and dynamic for these type events. Especially in the mid-levels.

Link to comment
Share on other sites

Umm not sure about everyone else but where I work in Somerset, barely ANY snow has fallen off the tree limbs/power lines.

 

I don't know if it's the complete lack of wind today or overcast skies but this will without a doubt increase the # of power outages tomorrow morning in the area

Link to comment
Share on other sites

At this time, I still don't buy the NAM's near "no snow" solution for NYC, southern Westchester/southern Fairfield counties and Long Island. My preference remains the combination of the ECMWF, GFS, and RGEM. Indeed, if one takes a look at the 15z HRRR model, one finds that guidance forecasting snow to break out across southern Pennsylvania at 15 hours in an area in which the NAM forecasts no snow.

 

This seems to be a case where the NAM is blasting the warm air into the mid-levels of the atmosphere (700 mb-900 mb) too aggressively. If so, this would not be a rare case in which it misses a thumping of snow prior to the changeover.

 

In short, my guess is that much of the NYC Metro Area will likely see 2"-4" of snow with a few higher amounts, similar amounts in Newark, 1"-3" on Long Island's South Shore/2"-4" on Long Island's North Shore, and 3"-6" in much of southern Westchester and Fairfield Counties.

 

Hi don, what are your thoughts for northern Westchester?

Link to comment
Share on other sites

At this time, I still don't buy the NAM's near "no snow" solution for NYC, southern Westchester/southern Fairfield counties and Long Island. My preference remains the combination of the ECMWF, GFS, and RGEM. Indeed, if one takes a look at the 15z HRRR model, one finds that guidance forecasting snow to break out across southern Pennsylvania at 15 hours in an area in which the NAM forecasts no snow.

 

This seems to be a case where the NAM is blasting the warm air into the mid-levels of the atmosphere (700 mb-900 mb) too aggressively. If so, this would not be a rare case in which it misses a thumping of snow prior to the changeover.

 

In short, my guess is that much of the NYC Metro Area will likely see 2"-4" of snow with a few higher amounts, similar amounts in Newark, 1"-3" on Long Island's South Shore/2"-4" on Long Island's North Shore, and 3"-6" in much of southern Westchester and Fairfield Counties.

Nice write-up Don. Even up to your north here at KSWF, the 12z NAM only has 0.3 of snow and the rest as ZR except for a few snow showers at the end.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...