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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 300
GFS-HR 06Z 300
NAM 06Z 084
RAP 10Z 006
ECMWF 12Z 240
GEFS 06Z 144
CMC 00Z 240

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