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12/7-12/8 Observation Thread


IsentropicLift

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Love the 1am NYC ob of winds variable at 5MPH. Meanwhile all reporting stations around Central Park are sustained btwn 25-35 with gusts to 40mph.

100 AM EST THU DEC 08 2011
NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.
NYZ071-072-176-178-NJZ106-104-080700-
NEW YORK CITY METRO AREA
CITY		   SKY/WX	TMP DP  RH WIND	   PRES   REMARKS
CENTRAL PARK   CLOUDY	42  40  92 VRB5	  29.46F
LAGUARDIA APRT LGT RAIN  43  38  82 NW30G38   29.43F
KENNEDY INTL   LGT RAIN  43  38  82 N33G41	29.41F
NEWARK/LIBERTY LGT RAIN  41  36  82 NW25G38   29.47F
TETERBORO	  LGT RAIN  42  35  76 N20G31	29.46S
WHITE PLAINS   CLOUDY	39  35  86 N32G40	29.40F

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Going on a reconnaissance mission...

Survived, but it was harrowing.

River level - Mostly snow, 36F, slush on windshields, snow looks really pretty in the street lights.

200ft - 35F, light dusting on grass and cars

300ft - 34F, solid coating on grass and cars

400ft - 33F, road completely snow covered, untreated, and few wheel tracks, 0.75"

600ft - 33F, dangerous roads, 1", heavy snow

1000ft - 32F, 1.5"+, snowing heavily and rapidly accumulating. Very dangerous driving conditions.

The changeover occurred in Putnam County extremely rapidly. Areas above 350ft dropped ~5 degrees and went from partially flooded to snow covered roadways in about 30 minutes. Great finale to this storm! snowing3.gifsnowing3.gif

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Survived, but it was harrowing.

River level - Mostly snow, 36F, slush on windshields, snow looks really pretty in the street lights.

200ft - 35F, light dusting on grass and cars

300ft - 34F, solid coating on grass and cars

400ft - 33F, road completely snow covered, untreated, and few wheel tracks, 0.75"

600ft - 33F, dangerous roads, 1", heavy snow

1000ft - 32F, 1.5"+, snowing heavily and rapidly accumulating. Very dangerous driving conditions.

The changeover occurred in Putnam County extremely rapidly. Areas above 350ft dropped ~5 degrees and went from partially flooded to snow covered roadways in about 30 minutes. Great finale to this storm! snowing3.gifsnowing3.gif

Wow.. Once we changed over here around midnight its almost like the precip stopped and its been just flurries ever since.

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Wow.. Once we changed over here around midnight its almost like the precip stopped and its been just flurries ever since.

thought you'd get some more out of this...but i did warn you re: the poor snowgrowth in the important layers on the soundings.

you got caught in some crappy precip rates too.

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Wow.. Once we changed over here around midnight its almost like the precip stopped and its been just flurries ever since.

Yeah I was sorry to see the dissipating returns over NWNJ and Orange county... just when the temp profile became supportive of snow. That's frustrating. Hopefully the backside stuff delivers for an hour or two.

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To support my observation of a rapid temp drop coinciding with a change to snow:

The Stonykill Mesonet weather station in Fishkill (200ft) reported 40F at 11:07, 38F at 12:07, and 33F at 1:07. The other stations in the area show similar crashing temps. Interestingly stations up near Kingston didn't experience such a rapid temp drop. That's the power of dynamical cooling. So impressive!

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