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NAM 1000-500mb Thickness Map Unavailable
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About This Map

Thickness is the difference between the geopotential heights at two levels of the atmosphere at a given moment. The black line on each map denotes roughly where the freezing line is for that section of the atmosphere. Thickness anomaly is the departure of the thickness from average. On our weather maps, thickness and thickness anomaly are given in decameters.

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Map Status


Model Run Hour
GFS 06Z 093
GFS-HR 06Z 099
NAM 06Z 084
RAP 09Z 011
ECMWF 00Z 240
GEFS 00Z 384
CMC 00Z 240
ECMEPS 00Z 240

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2018-12-04: Changed snowfall algorithm to be more accurate.