Distribution of Freezing Drizzle
• The distribution is very
different from that
of freezing rain, although both show the highest frequencies over eastern Newfoundland.
•A much larger frequencies is found over the central US and Canada, where warm air is lifted aloft over arctic airmasses, creating a stratus cloud layers.
• Typically, arctic fronts
originate in central
Canada and move southward into Central US, where
the freezing drizzle
occurs.
• Freezing drizzle is rare
in the western US.
• Freezing drizzle occurs
twice more often before sunrise than in the afternoon hours.