871
ACUS11 KWNS 171455
SWOMCD
SPC MCD 171455
MAZ000-NHZ000-CTZ000-VTZ000-NYZ000-NJZ000-PAZ000-171800-
MESOSCALE DISCUSSION 0023
NWS STORM PREDICTION CENTER NORMAN OK
0855 AM CST SAT JAN 17 2026
AREAS AFFECTED...NORTHERN NJ INTO SOUTHWEST NEW ENGLAND
CONCERNING...HEAVY SNOW
VALID 171455Z - 171800Z
SUMMARY...TRANSIENT HEAVY SNOW IS EXPECTED TO SHIFT NORTHEASTWARD IN
THE NORTHEAST TO SOUTHWEST NEW ENGLAND THROUGH EARLY AFTERNOON.
RATES SHOULD BRIEFLY REACH 1 INCH PER HOUR BEFORE WANING.
DISCUSSION...A CONFINED BAND OF MODERATE TO HEAVY SNOW WITH SEVERAL
HALF TO QUARTER-MILE VISIBILITIES ONGOING ACROSS MAINLY SOUTHEAST
PA, NORTH-NORTHWEST OF THE PHILADELPHIA METRO AREA, IN ASSOCIATION
WITH A SHORTWAVE IMPULSE PROGRESSING NORTHEASTWARD ACROSS THE
NORTHEAST. 12Z OBSERVED AND FORECAST SOUNDINGS INDICATE THE
DENDRITIC GROWTH ZONE IS CENTERED BETWEEN 575-650 MB. ASCENT WITHIN
AND BELOW THIS LEVEL APPEARS LIKELY TO PEAK THROUGH ABOUT 18Z, WHICH
SHOULD FAVOR SNOWFALL RATES AROUND 1 IN/HR. THIS SHOULD BE TRANSIENT
AT ANY ONE LOCATION AS THE BURST OF HEAVY SNOW SHIFTS NORTHEASTWARD
FOLLOWED BY DRYING IN THE DENDRITIC GROWTH LAYER.
..GRAMS.. 01/17/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...
LAT...LON 40787433 40517507 40807529 41777433 42797315 43027244
42917200 42527218 42057256 41367348 40787433
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