CONTEST STATUS - Updated: WED ... 13-DEC-17 @ 8:30 PM EST

Winter '17 / '18 - Snowfall Forecast Contests
19th Annual 'Regular Season'
Snow Storm #1
Synoptiscope in VCP32

17th Annual 'Season-total'
Deadline for entries has passed
Forecasters' summary here

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Winter '16 / '17 - Snowfall Forecast Contests
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18th Annual 'Regular Season'
FINAL results here
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16th Annual 'Season-total'
FINAL results here

Sunday, January 18, 2009

Stellar Dendrites

High SN:H2O were observed in this morning early snowfall reports.

ORH - 23:1
CON - 24:1
BDL - 25:1

Ratios are well above normal.



Image courtesy Cooperative Institute for Precipitation Systems



12z Skew-T from GYX shows cloud-top ~-18°C...the cold edge of favored stellar dendrite growth region. Note the strong warm-air advection near 700 mb acting on the elevated moist layer where mixing ratios reach their maximum value.

Skew-T courtesy SPC.



Snowflake morphology courtesy SnowCrystals.com

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