Predicting Weather By The Moon - Xavier University Libraries

Weather Maps
Moon to Earth for the year meant it would not have generated
strong winds. On the other hand the perigee of April
1949 being the 4th closest would lead us to expect the
weather to have been equally if not more vicious to that on
the day of the Wahine disaster.
LANGUAGE OF WEATHER MAPS
A front is the interface between air masses at different
temperatures. A warm front is when the air behind
the front is warmer than that ahead of it - the pips (triangles
or half circles) are put on the side of the front towards
which the front is moving. A cold front is when the air behind
the front is colder than the air ahead of it.
Occluded front - a composite of two fronts,
formed when a cold front overtakes a warm front or quasistationary
front. The point where the occluded, warm and
cold front come together is called the Triple Point, an area
of extreme instablility, and often where severe storms can
be found.
Stationary front - no real temperature change from
one side of the front to another, mostly a change in wind
direction as the front moves through.
Trough - an elongated area of relatively low pressure
often associated with disturbances like showers, rain,
clouds.
High pressure - associated with clear skies, nice
weather
Low Pressure - associated with clouds, precipitation.
An ascending air motion is associated with cloudiness
and rain. High values of relative humidity indicate the
183