La Crosse Technology, Ltd.
Page 12
Pressure History
Numeric History:
Press and release the HISTORY button to view the past 12-hours of numeric pressure history.
In the small box to the right of the numeric pressure a number from 0 to -12 will appear.
0 is current pressure. -1 through -12 reflects the history in one-hour increments.
Note:
The history graph and forecast icons will not change when you view pressure history.
12-hour Pressure History Graph
The bar chart indicates the air pressure history trend over the last 12 hours in 5 steps, 0h, -1h, -2h, -3h, -
6h & -12h.
The columns represent the change in the measurements of ”InHg” or “hPa” at specific times.
The “0” in the middle of this scale is equal to the current pressure and each bar represents the past
pressure high or low in InHg or hPa compared to the current pressure.
Read the graph from left to right.
When the bars are rising, it means that the weather is getting better due to the increase of air
pressure.
When the bars go down, it means the air pressure has dropped. Expect the weather to get worse from
the present time (
0h
).
Note:
The bar graph will scroll continually to prevent LCD burnout.
Moon Phase
The moon phase is divided by 6 sections, showing 12 phases of the moon.
Note:
With the moon shown against a light colored background, the phases will show opposite to a paper
calendar. The segments highlighted portray the part of the moon that is visible in the sky. For instance,
the moon will be blank during a new moon and dark during a full moon.
New Moon
occurs when the moon is between the earth and sun so the illuminated portion of the moon is
on the backside facing the sun and we cannot see it. After a new moon, the illuminated (visible) portion
will increase or wax until the full moon occurs.
Full Moon
occurs when the earth, moon, and sun are in approximate alignment, with the moon and the
sun on opposite sides of the earth. The illuminated portion of the moon faces the earth, giving us
complete visibility of one side of the entire moon. After a full moon, the illuminated portion will decrease or
wane until the new moon occurs.
First Quarter
and
Last Quarter
moons occur when the moon is at a 90-degree angle to the earth and
sun. Therefore, we see half of the moon illuminated and half is in shadow.
Waxing
means growing or expanding illumination and happens after a new moon.
Waning
means decreasing illumination and occurs after a full moon.
Crescent
refers to the moon being less than half-illuminated. Crescents can be waning or waxing.
Gibbous
describes a moon phase when more than half is illuminated. Gibbous can be waxing or
waning.
Tides
The tides reflected on this Station are the ebb and neap tides of the lunar month. Not daily high and low
tides.
When the forecast station states high tide, the tides will be higher than usual, etc.
When the sun, moon and earth line up at new and full phases of the moon, tides will be higher.
When the moon is at right angles to the sun and Earth at the first and last quarter, the tides are
weaker.
Full & new moon
= spring tide (TIDE
HI
).
Quarter
= neap tide (TIDE
LO
)
Other
= mean water level (TIDE
MID
)
