Weather Forecasting Description And Limitations; Lightning Icon; Pm2.5 Sensor (Optional); History Mode - Ambient Weather Copyright 2019 User Manual

6.5.3 Weather Forecasting Description and Limitations

In general, if the rate of change of pressure increases, the weather is generally improving (sunny to
partly cloudy). If the rate of change of pressure decreases, the weather is generally degrading (cloudy,
rainy or stormy). If the rate of change is relatively steady, it will read partly cloudy.
The reason the current conditions do not match the forecast icon is because the forecast is a prediction
24-48 hours in advance. In most locations, this prediction is only 70% accurate and it is a good idea to
consult the National Weather Service for more accurate weather forecasts. In some locations, this
prediction may be less or more accurate. However, it is still an interesting educational tool for learning
why the weather changes.
The National Weather Service (and other weather services such as Accuweather and The Weather
Channel) have many tools at their disposal to predict weather conditions, including weather radar,
weather models, and detailed mapping of ground conditions.

6.5.4 Lightning Icon

The lightning icon
and humidity conditions may be possible for lightning storms to form in the area.

6.5.5 PM2.5 Sensor (optional)

An optional PM2.5 sensor is available for the WS-2000. The display shows the current PM2.5
measurement, and the 24 hour running average, which is a better indication of the accumulative effect
of particulates on overall health.
The display features a color coded icon with the following breakpoints:
AQI Category
Good
Moderate
Unhealthy for
Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

6.6 History Mode

6.6.1 Min/Max

View high and low records, and clear specific records in the history mode.
View and reset minimum and maximums.
Version 2.9 ©Copyright 2019, Ambient LLC. All Rights Reserved.
appears when then Dew Point exceeds 70 ºF, which signifies temperature
Color
Green
Yellow
Orange
Red
Purple
Maroon
Figure 21
Breakpoints
3
(µg/m )
0.0 – 12.0
12.1 – 35.4
35.5 – 55.4
55.5 – 150.4
150.5 – 250.4
250.5 – 500
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