La Crosse Technology WS-7058U Instruction Manual page 11

A. WEATHER ICONS
There are 3 possible weather icons that will be displayed at various
times in LCD 3:
Sunny
Sunny—indicates that the weather is expected to improve (not that the
weather will be sunny).
Sun with Clouds—indicates that the weather 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 change in order, from "sunny" to "sun with
clouds" to "clouds with rain" or the reverse. It will not change from
"sunny" directly to "clouds with rain", although it is possible for the
change to occur quickly. If the symbols do not change, the weather has
not changed (or the change has been slow and gradual).
B. WEATHER TENDENCY ARROWS
LCD 3 also displays the
weather tendency arrows.
One arrow points up and one
arrow points down, both arrows appear on the left-hand side of LCD 3
at different times. These arrows reflect current changes in the air
pressure. An arrow pointing up indicates that the air pressure is
increasing and the weather is expected to improve or remain good, and
arrow pointing down indicates that the air pressure is decreasing and
the weather is expected to become worse or remain poor. No arrow
means the pressure is stable.
C. STORM WARNING
A storm can be expected if there is a drop of 4 hPa or more in less than
6 hours. The clouds with rain icon will be displayed and the tendency
arrow that points down will be flashing—indicating the storm warning
feature has been activated. The flashing will stop when the air pressure
stabilizes or begins to rise.
Sun with Clouds
Tendency
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Clouds with Rain