...PLEASE SEE WWW.SPC.NOAA.GOV/ FOR GRAPHIC PRODUCT...
NNNN
ZCZC MKCSWOMCD ALL
ACUS3 KMKC 302249
MKC MCD 302249
NYZ000-VTZ000-310400-

SPC MESOSCALE DISCUSSION #2158 FOR ERN NY AND PARTS OF WRN
VT...
CONCERNING...HEAVY SNOW...

SNOWFALL RATES AS HIGH AS 2-3 INCHES PER HOUR ARE EXPECTED
ALONG
THE HUDSON AND CHAMPLAIN VALLEYS...AND INTO THE CATSKILLS
AND
ADIRONDACKS OF ERN NY.

LATEST SATELLITE AND RADAR IMAGERY SHOWS A DEFORMATION ZONE
SETTING
UP ROUGHLY N-S ALONG AND JUST WEST OF THE CHAMPLAIN / HUDSON
VALLEYS. THIS DEFORMATION ZONE WILL LIKELY DRIFT ONLY SLOWLY
WWD...EVENTUALLY BECOMING QUASI-STATIONARY ACROSS THIS
REGION AS
THE SURFACE LOW MOVES SLOWLY NWD INTO ERN MA. EXPECT VERY
HEAVY
SNOW IN THIS BAND AS IT REMAINS ACROSS THIS REGION FOR AN
EXTENDED
PERIOD OF TIME. THE HEAVIEST SNOWFALL RATES ARE LIKELY ALONG
THE
ERN CATSKILLS AND ADIRONDACKS AS LOW-LEVEL ELY FLOW UPSLOPES
OUT OF
THE HUDSON AND CHAMPLAIN VALLEYS.
 

..GOSS.. 12/30/00

...PLEASE SEE WWW.SPC.NOAA.GOV/ FOR GRAPHIC PRODUCT...
NNNN
ZCZC MKCSWOMCD ALL
ACUS3 KMKC 302321
MKC MCD 302321
MAZ000-NHZ000-VTZ000-MEZ000-310500-

SPC MESOSCALE DISCUSSION #2159 FOR VT / NH / SRN 2/3 ME /
NERN
MA...
CONCERNING...HEAVY SNOW...

SNOWFALL RATES AT OR ABOVE 2 INCHES PER HOUR ARE EXPECTED
OVER THE
NEXT 4 TO 6 HOURS ACROSS MUCH OF NEW ENGLAND FROM NERN MA
NWD INTO
CENTRAL ME.

LATEST SURFACE ANALYSIS SHOWS SURFACE LOW OVER LONG ISLAND
SOUND.
MODEL FORECASTS SHOW THIS LOW CONTINUING TO DEEPEN WHILE
MOVING
SLOWLY NWD TO A POSITION IN ERN / CENTRAL MA BY 31/06Z.
VWPS AT KBOX AND KGYX SHOW STRONGLY VEERING WINDS WITH
HEIGHT...
INDICATING STRONG WARM ADVECTION AND UPWARD VERTICAL MOTION.

ADDITIONALLY...ELY / SELY LOW-LEVEL FLOW CONTINUES OFF THE
ATLANTIC...BRINGING HIGH THETA-E AIR INLAND. AS STRONG UVV
CONTINUES / SHIFTS SLOWLY NWD ACROSS NEW ENGLAND...HEAVY
SNOW WILL
CONTINUE SPREADING NWD AND WWD INTO SRN ME / VT / NH.
LOW-LEVEL NELY FLOW IS CURRENTLY PARALLEL TO THE ME
COASTLINE...BUT
IS MORE ONSHORE ACROSS SERN NH AND MA. AS A RESULT...WARMING
TEMPERATURES AND A CONTINUED CHANGEOVER TO RAIN ARE EXPECTED
IN
COASTAL AREAS OF MA AND NH...WHILE LITTLE WARMING IS
EXPECTED IN ME
FOR THE NEXT COUPLE OF HOURS. SOME VEERING OF THE LOW-LEVEL
FLOW
WILL LIKELY OCCUR IN EXTREME SERN ME LATER THIS EVENING AS
THE
SURFACE LOW MOVES NWD...PERHAPS ALLOWING A CHANGEOVER TO
RAIN AS
FAR N AS PWM BY MIDNIGHT EST.
 

..GOSS.. 12/30/00

...PLEASE SEE WWW.SPC.NOAA.GOV/ FOR GRAPHIC PRODUCT...
NNNN
ZCZC MKCSWOMCD ALL;
ACUS3 KMKC 310539
MKC MCD 310539
MEZ000-NHZ000-311100-

SPC MESOSCALE DISCUSSION #2160 FOR ME AND NRN NH...
CONCERNING...HEAVY SNOW...

SNOWFALL RATES AS HIGH AS 2 INCHES PER HOUR ARE EXPECTED
ACROSS ME
AND NRN NH THROUGH 31/11Z...WITH THE REGION OF HEAVIEST SNOW
SHIFTING NWD WITH TIME.

LATEST SURFACE ANALYSIS SHOWS 991 MB LOW CENTERED IN NERN
MA...
WITH A COASTAL FRONT EXTENDING NEWD ALONG THE ME COASTLINE.
WSR-
88D VWPS AT GYX /GRAY ME/ AND CBW /CARIBOU ME/ CONTINUE TO
SHOW
VEERING WINDS WITH HEIGHT...IMPLYING WARM ADVECTION AND UVV.
BROAD
AREA OF HEAVY SNOW CONTINUES ACROSS MUCH OF ME ATTM...AND
GIVEN THE
MAGNITUDE OF WARM ADVECTION / FORCING FOR LARGE-SCALE
ASCENT...
EXPECT HEAVY SNOW TO CONTINUE ACROSS THE REGION THROUGH THE
PERIOD.
THE AREA OF HEAVY SNOW CONTINUES SHIFTING NWD WITH
TIME...WITH THE
SRN EDGE OF THE SNOW CURRENTLY JUST NORTH OF AN LCI TO PWM
LINE
MOVING NWD AT 15 TO 20 MPH. EXTRAPOLATION PLACES THE SRN
FRINGE OF
THE SNOW THROUGH CENTRAL ME BY THE END OF THE PERIOD...AND
THIS
SEEMS REASONABLE GIVEN TRENDS OVER THE PAST SEVERAL HOURS.
MEANWHILE...THE NRN EDGE OF THE ZONE OF HEAVY SNOW CONTINUES
EXPANDING RAPIDLY NWD...AND IS EXPECTED TO REACH
NORTHERNMOST ME BY
31/0630Z.
 

..GOSS.. 12/31/00