La Crosse Technology 308-1425CA Manual D'instructions page 11

Animated forecast icons use changing atmospheric pressure to predict weather conditions for the next
12-hours with 70-75% accuracy.
INTELLIGENT WEATHER FORECAST
This station learns; please allow 3 to 4 weeks for barometric calibration. This will ensure an accurate
personal forecast for your location.
The Weather station samples the barometric pressure every twelve minutes.

These samples are averaged hourly and daily then stored in nonvolatile memory.

The three hour pressure icon change is based off of the last four average hourly readings.

IMPORTANT: As the Weather station builds memory, it will compare the current average pressure to
the past forty day average pressure for increased accuracy. The longer the Weather station operates
in one location, the more accurate the forecast icons will be.
Pressure Tendency Indicators (Up, Right, Down Arrows)
Working with the forecast icons, the tendency indicators let you know if the weather is improving,
steady or worsening.
Rising Pressure Weather is
Expected to Improve
Press the TIME SET button to start or stop a manual signal search. The WWVB Icon flashes
•
during signal search.
For information about WWVB visit:
www.nist.gov/pml/div688/grp40/wwvb.cfm
Model: 308-1425CA
Animated Color Forecast Icons
Steady Pressure Weather is
Expected to Stay the Same
Manual WWVB Time Signal Search
https://www.lacrossetechnology.com/308-1425ca
Falling Pressure Weather is
Expected to Worsen
WWVB
ATOMIC
ICON
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