CONTEST STATUS - Updated: SUN ... 10-JAN-21 @ 3:45 PM EST

Winter '20 / '21 - Snowfall Forecast Contests
22nd Annual 'Snow Storm' Snowfall Forecast Contest

Snow Storm #2
Synoptiscope in VCP 32

Snow Storm #1
FINAL Results here

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20th Annual 'Season-total' Snowfall Forecast Contest
Deadline for entries has passed.
The Forecasts! here
DEC Snowfall Totals here

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Winter '19 / '20 - Snowfall Forecast Contests
21st Annual 'Snow Storm' Snowfall Forecast Contest
Season ended as quickly as it started.
No winner this go'round ... too few storms (minimum of three required)

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19th Annual 'Season-total' Snowfall Forecast Contest
FINAL Results here

Friday, December 18, 2020

Winter '20 / '21 - Snow Storm #1: Preliminary STP Verification

Accumulation-weighted SN:H2O

Preliminary verification of storm-total snowfalls for WED and THU from CDUS41 (CLI) ... CXUS51 (CF6) ... METARs ... and PNS bulletins.  Excellent coverage and reporting.

HYA STP estimated by applying inverse distance weighting interpolation of five timely reports within 3 SM of the station carried by the BOSPNS bulletin.

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SLR not reported for some stations with measurable snowfall b/c significant liquid and / or freezing precipitation also occurred during the verification period.

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Stations observing >= 0.1"  20 (74%)

Given a station had measurable snowfall; stations observing at least ...
4" - 16 (76%)
8" - 11 (53%)
12" - 7 (33%)
18" - 3 (14%)
24" - 2 (10%)

MAX snow melt-water (minimum SLR 10:1)
BGM:  2.8"
ALB:  2.0"
BOS:  1.3"

MAX liquid precipitation (frozen + freezing + liquid):
BGM:  2.8"
ACY:  2.06"
ALB:  2.0"

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New daily record(s)
16-DEC-20
BDR - 6.5" (2"; 1970)
ISP - 5.7" (1.5"; 1995)
JFK - 3.8" (1.3"; 1981)

17-DEC-20
BGM - 26.4" (9.8"; 1973)
CON - 24.2" (8.6"; 1970)
ALB - 19.7" (11.1"; 1970)
BOS - 12.7" (6.4"; 2013)
ORH - 10.5" (9.9"; 1970)
BDL - 7.8" (6.5"; 2016)
PVD - 6.4" (4"; 1961)
EWR - 5.9" (3"; 2016)
JFK - 3.4" (3"; 2016)

Storm total snowfall
Image courtesy NOHRSC

SFC analysis:  09z ... 17-DEC-20
Image courtesy DOC / NOAA / NWS / NCEP / WPC

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Please report any errors in Comments along with a link to the correct data.
FINAL results expected NLT SAT evening.

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