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OBS thread Feb 20-21, 2019


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3 minutes ago, HVSnowLover said:

Yea for the coast the story of the winter has been rain, rain, rain, a bit inland it's been ice storm after storm.   

I'm getting tired of waiting for the damage to begin. I keep a jug of gas ready to go into the generator and the heavy duty cord ready to go. While sleet is a big pain in the butt to deal with the ice on top of it has been a real winning combination :yikes:

1 minute ago, Juliancolton said:

Monster sleet.

1kyapWf.jpg

Boom! Yeah man that's huge.

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1 hour ago, HVSnowLover said:

Yea for the coast the story of the winter has been rain, rain, rain, a bit inland it's been ice storm after storm.   

Yep.  We've had a bad stretch of sleet and freezing rain.  Tonight is no exception with everything heavily crusted over out there.

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000
NOUS41 KOKX 210640
PNSOKX
CTZ005>012-NJZ002-004-006-103>108-NYZ067>075-078>081-176>179-211840-

Public Information Statement
Spotter Reports
National Weather Service New York NY
140 AM EST Thu Feb 21 2019

The following are unofficial observations taken during the past 7
hours for the storm that has been affecting our region. Appreciation
is extended to highway departments, cooperative observers, Skywarn
spotters and media for these reports. This summary also is available
on our home page at weather.gov/nyc

********************STORM TOTAL SNOWFALL********************

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS
                     SNOWFALL           OF
                     /INCHES/   MEASUREMENT

CONNECTICUT

...Fairfield County...
   Weston                 2.0   915 PM  2/20  Trained Spotter
   1 NE Mill Plain        1.2   700 PM  2/20  Social Media
   Easton                 1.0   856 PM  2/20  Public
   Bridgeport Airport     1.0   700 PM  2/20  COOP OBSERVER

...New Haven County...
   North Haven            0.7   750 PM  2/20  Social Media

NEW JERSEY

...Bergen County...
   Ridgewood              1.5   700 PM  2/20  Trained Spotter
   East Rutherford        1.4   950 PM  2/20  Trained Spotter

...Essex County...
   West Orange            2.2   900 PM  2/20  Public
   Cedar Grove            2.1   915 PM  2/20  Public

...Hudson County...
   Harrison               2.1   845 PM  2/20  Co-Op Observer

...Union County...
   Elizabeth              2.7   700 PM  2/20  Trained Spotter
   Newark Airport         2.5   700 PM  2/20  FAA CONTRACT OBSERVER

NEW YORK

...Kings County...
   1 SSW Bergen Beach     1.0  1140 PM  2/20  NYC OEM CERT

...Nassau County...
   Wantagh                1.5   745 PM  2/20  Trained Spotter
   New Hyde Park          1.5   700 PM  2/20  Trained Spotter
   East Williston         1.3   730 PM  2/20  Public
   East Meadow            1.1   730 PM  2/20  NWS Employee

...New York (Manhattan) County...
   Central Park           1.3   700 PM  2/20  Park Conservancy

...Queens County...
   NYC/JFK Airport        1.8   700 PM  2/20  FAA CONTRACT OBSERVER
   Whitestone             1.7   730 PM  2/20  Trained Spotter
   NYC/LaGuardia Airpor   1.4   736 PM  2/20  FAA CONTRACT OBSERVER
   Queens Village         1.3   700 PM  2/20  Trained Spotter
   Elmhurst               1.2   826 PM  2/20  Trained Spotter

...Rockland County...
   Chestnut Ridge         1.3   700 PM  2/20  Public
   Stony Point            1.1   830 PM  2/20  Trained Spotter

...Suffolk County...
   North Babylon          1.8   915 PM  2/20  Public
   Islip Airport          1.4  1200 AM  2/21  FAA Observer
   Lake Ronkonkoma        1.3   824 PM  2/20  Trained Spotter
   Upton                  1.0   900 PM  2/20  NWS Office

...Westchester County...
   Rye Brook              2.0  1030 PM  2/20  Trained Spotter


***********************STORM TOTAL ICE***********************

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS
                          ICE           OF
                     /INCHES/   MEASUREMENT

CONNECTICUT

...Fairfield County...
   Danbury Airport       0.21  1253 AM  2/21  ASOS
   Bridgeport Airport    0.20   952 PM  2/20  ASOS

...New Haven County...
   Meriden Airport       0.15  1253 AM  2/21  ASOS
   New Haven Airport     0.11  1253 AM  2/21  ASOS

...New London County...
   Groton Airport        0.10  1256 AM  2/21  ASOS

NEW JERSEY

...Bergen County...
   1 E Washington Towns  0.10  1115 PM  2/20  Trained Spotter

...Essex County...
   Caldwell Airport      0.27  1253 AM  2/21  ASOS

NEW YORK

...New York (Manhattan) County...
   Central Park          0.16  1251 AM  2/21  ASOS

...Orange County...
   Montgomery Airport    0.27  1254 AM  2/21  ASOS

...Rockland County...
   Chestnut Ridge        0.11   104 AM  2/21  Public

...Suffolk County...
   Westhampton Airport   0.09   953 PM  2/20  ASOS
   Shirley Airport       0.06   956 PM  2/20  ASOS
   Islip Airport            T   956 PM  2/20  ASOS

&&

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Wantage NJ 8 s High Point.  1.3" final. nice glaze but no power outages. 31.8F at 627AM. Thanks for all the observation posts. Will add a graphic later this afternoon summarizing the snowfall via NOHRSC. Posting another graphic on Feb thread, unless there is a March thread already. 

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2 minutes ago, hudsonvalley21 said:

This doesn't happen that often, amazing how fast it's melting . Sun feels good out there especially without the wind.

It really is astonishing. If you slept in until 9:30 today you'd have been oblivious to the fact that the thickest glaze in at least a couple years had befallen us overnight.

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A few notes:  On branches. It is only my experience, but I think you need about .50 radial ice to crash the branches.  Many utilities I think use 0.25 radial ice.  I think all the nearby ASOS's recorded less than 0.20 radial.   On wet snow,  my experience is ~6 inches of wet snow accretion on branches will take them down (snow falling at 32-33F).

Good afternoon,

My last initiated post on this event.

I've added two graphics to verify the event: One is the snowfall map.  Legend can be helpful.  And also the qpf map...both 24 hours from 12z/20-12z/21.

My own Wantage amount of 1.3" might be slightly conservative. Season 24.0.  The HRRRX forecast map I posted yesterday was too robust.  I think the ensemble prob of various amounts as posted by the NWS can be conservative but is useful for every event and is worthy of reviewing.  I noticed the EC had a 70% prob of 3+ extending newd along I95 in NJ and that did not work out either.  Thanks for all the posted OBS information.  Walt

 

Screen Shot 2019-02-21 at 5.03.26 PM.png

Screen Shot 2019-02-21 at 5.05.38 PM.png

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20 hours ago, psv88 said:

You live in one of the colder and snowier areas on the island there. Your elevation is likely around 300 feet, definitely helpful in marginal storms

If you could pin it down to one town, or one small part of the Island, which part or town do you think held onto icing the longest?

 

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