La Crosse Technology WS-7044U Instruction Manual page 11

There are 3 possible weather icons that will
be displayed in the FORECAST LCD:
Sunny—indicates that the weather
is expected to improve (not that
the weather will be sunny).
is expected to be fair (not that the weather
will be sunny with clouds).
Clouds with Rain—indicates that
the weather is expected to get
worse (not that the weather will
be rainy).
The weather icons change when the unit
detects a change in air pressure. The icons
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Sun with
Clouds—
indicates that
the weather