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Everything posted by NorthShoreWx
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December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
30.9 with freezing fog here. There's nothing vague about the fog anymore. Visibility is 1/4 mile or less but you can still make out the waxing crescent moon through the fog. It is surreal out there. Great night for a walk if you have traction aids for your feet and don't mind getting run over by a skidding car. Be careful if driving. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
Weather Service doesn't seem to be hitting the idea very hard, but this is a textbook black ice scenario on the north shore right now. 0.4" snowfall today, current temp is 31 and its vaguely foggy. Or is that foggily vague. No, the first one. Its icy out there. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
This isn't a snowfall mecca, but one area where we do well compared to some regions with higher average snowfall is the big snow events. The ocean taketh away, but it also giveth. And here on the coast where it is often windier...I haven't done any research but it feels like we verify a lot of blizzards. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
Nice way to make the point about numbers. The 70s and 80s were highly anomalous too. Show me another 20 year period with snowfall as low. The new 30 year climo is going to be within about 1.5" of the POR average for NYC (including some good decades and some bad ones). -
Obs and nowcast Sunday 12/20/20 daylight snowfall
NorthShoreWx replied to wdrag's topic in New York City Metro
Nice mood snow. Tempted to go out skiing for the third day in a row. 12:33PM: -
Obs and nowcast Sunday 12/20/20 daylight snowfall
NorthShoreWx replied to wdrag's topic in New York City Metro
Steady light snow here with viz down to just over 0.5 miles. Cleared driveways are recoated and some of the side roads are starting to coat. About 1/4" new. Temp is 32. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
So much for a December shutout. This is not a criticism. I was leaning that way too. -
Is there a problem with my connection or is the new NWS Radar landing page an abomination? Difficult to see, difficult to select/configure, and great big gobs of latency. By the time it updates, the storm is over. For those of you already with your fingers on the keyboard about to respond 'I never use that you should use such and such', save it. The question is about the NWS radar landing page.
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Obs and nowcast Sunday 12/20/20 daylight snowfall
NorthShoreWx replied to wdrag's topic in New York City Metro
Smithtown. First flake spotted 10:52 AM. Snow is showing up nicely on traffic cams to our southwest. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
That's really close. I think mine catches very little snow when it's windy. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
Understood. Was more than I was expecting but not impossible. I thought I picked a good spot but who knows I don't know a better way to do it. Even NWS climo stations report some unlikely stuff when it snows. -
December 2020 General Discussions & Observations Thread
NorthShoreWx replied to bluewave's topic in New York City Metro
The Grinch usually isn't denied, but this snowcover won't dissapear from a few 40 degree days in December sun. Our 6.7 inches of snow here (now 6" snowdepth) contains 1.61" of water. I melted the catch in the rain gage and it was only 0.64" so I took a core which melted to 1.61". -
Biggest Pre-winter snowfalls at Central Park: 16.0" December 19-20, 1948 15.2" December 11 - 12, 1960 14.0" December 5 - 7, 2003 12.7" December 15, 1916 10.5" December 16 - 17, 2020 10.0" November 26-27, 1898 Makes the top 5 in the past 150 years. Sounds really substantial when you put it that way.
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
This might be best part of the storm here. Borderline blizzard conditions.- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
Not a total porking. We went over to sleet around midnight with the temp around 31 and had light accumulatons of sleet. Didn't go above freezing until sometime beteween 3 and 4 and got a little rain during that time, but barely enough to start to "darken" the thin layer of sleet that had accumulated on previously cleared surfaces. Temp peaked at 34.3 at 4:12 and had dropped back to 29 by 4:45. The snow since then is crappy flakes, but the lowest visibilities of the entire event. Basically nothing melted and we are approaching 6" with ongiong snowfall.- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
When the guidance on measuring snow changed several years ago (and for the life of me I can't find when it happened, but I remember that it did indeed happen), the instructions included that the board would no longer be wiped at a phase change. I've never agreed with that. As a hypothetical example: 1. In a 20 hour period 3" sleet falls with 1.00" liquid followed by 6" snow with 0.5" liquid. Total precip =1.50" Daily Snow measured = 9" 2. Same scenario but the snow falls first and gets beaten into unconsciousness by the sleet. (assuming for this exercise that the snow and sleet depth at end was 6") Total precip = 1.50" Daily Snow measured = 6" The exact same precip fell in both storms and its all still lying on the ground, but a casual observer would easily conclude that the event where 9" was measured was bigger than the 6" event. You can make inferences based on the liquid equivalent, but in the end you are losing information about the amount of snow and sleet that fell. In many ways snow depth and SWE are more important metrics, but snowfall is a different statistic and is what most of us are more interested in That being said, there were a lot of phase changes tonight.- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
Sleet here for the first time. temp still 31. 4.9" (11:45)- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
Light to moderate snow continues. The wind has increased over the past hour and there is considerable blowing snow. No pingers that I could detect so far. Was very light snow during that last lull. Had 4.3" as of 9:30. I doubt we've hit 5" yet. Temp up to 31 (11:26PM)- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
It's 40ish right on the beaches down that way but low to mid 30s a few miles inland.- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
NorthShoreWx replied to wdrag's topic in New York City Metro
Any reports of OES in Monmouth County? https://weather.cod.edu/satrad/nexrad/?parms=DIX-N0Q-1-24-100- 1,011 replies
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Got it. The actual NAM model soundings at h51 were all comfortably below freezing at all levels above the immediate surface (where they were 32 or 33).. Not sure how that map is calculated since the model soundings should drive what's drawn on the map and there is no way to derive sleet or zr from the sounding..
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Wasn't inferring it was an analog. Not sure there are many analogs for this one (as modeled) , but there are certainly examples where both areas got hit hard.
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March 2001 The discussion that started it all: http://www.northshorewx.com/HPC20010302.html And the ultra-modern 2001 hi-tech graphics:
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Precisely. NAM soundings IMBY show snow through hour 54. Then light sleet with a little drizzle for an hour or so after that and back to all snow for the duration. The mixed precip occurs with the dryslot.
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