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First Below Zero Day In NYC Since 1994


bluewave

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Why do different urban areas need different temperatures at 850 to hit zero?

Extreme example: Montreal

Part of it is air mass trajectory, did the air pass over the Great Lakes. Being on the littoral also ameliorates the temperature as well, which is not an issue for Montreal.

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UPTON

 

 

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE NEW YORK NY
404 AM EST FRI FEB 12 2016

...DANGEROUSLY COLD WINDCHILLS THIS WEEKEND...

NJZ004-006-104>108-NYZ072>075-078>081-176>179-122215-
/O.NEW.KOKX.WC.Y.0001.160213T2100Z-160214T1700Z/
EASTERN PASSAIC-HUDSON-EASTERN BERGEN-WESTERN ESSEX-EASTERN ESSEX-
WESTERN UNION-EASTERN UNION-NEW YORK (MANHATTAN)-BRONX-
RICHMOND (STATEN ISLAND)-KINGS (BROOKLYN)-NORTHWESTERN SUFFOLK-
NORTHEASTERN SUFFOLK-SOUTHWESTERN SUFFOLK-SOUTHEASTERN SUFFOLK-
NORTHERN QUEENS-NORTHERN NASSAU-SOUTHERN QUEENS-SOUTHERN NASSAU-
404 AM EST FRI FEB 12 2016

...WIND CHILL ADVISORY IN EFFECT FROM 4 PM SATURDAY TO NOON EST
SUNDAY...

THE NATIONAL WEATHER SERVICE IN UPTON HAS ISSUED A WIND CHILL
ADVISORY...WHICH IS IN EFFECT FROM 4 PM SATURDAY TO NOON EST
SUNDAY.

* LOCATIONS...METRO NEW YORK CITY AND NEW JERSEY AND LONG ISLAND.

* HAZARD TYPES...POTENTIALLY DANGEROUS WINDCHILLS.

* TIMING...COLDEST WIND CHILLS LATE SATURDAY NIGHT INTO EARLY
SUNDAY MORNING.

* WIND CHILL...AS LOW AS 20 TO 25 BELOW DUE TO TEMPERATURES OF 5
ABOVE TO 5 DEGREES BELOW ZERO...AND NORTHWEST WINDS 20 TO 30
MPH WITH GUSTS UP TO 45 MPH
.


* IMPACTS...THE FRIGID CONDITIONS WILL BE DANGEROUS TO THOSE
VENTURING OUTSIDE. PROLONGED EXPOSURE MAY CAUSE FROSTBITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

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