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Chapter 2
WEATHER & WATER CONDITIONS
Before a boating outing check the weather conditions. As
we all know the weather can change rapidly in many parts
of the country. It does so sometimes without being
predicted. NOAA weather radio reports are continuously
available on designated frequencies installed on VHF radios
and various handhelds. Also, many local radio stations carry
weather reports .
CLOUD FORMATIONS
Clouds indicate the type of current weather and upcoming
changes in
the weather.
Knowing
the type of
cloud
formations
can assist
you in
choosing
the
appropriate
boating day
or if already
on the
water will
help you
understand
any upcoming weather changes. Flat clouds (stratus)
normally indicate stable air. Cumulus clouds indicate
unstable air. Often a “cottonball” or cumulus cloud builds
vertical height in the afternoon and the result is a
thunderstorm with increased winds and waves; sometimes
these storms are quite violent. You can find additional
information on weather (meteorology) at your local library.
20,000 Ft.
6,500 Ft.
HIGH CLOUDS
MIDDLE CLOUDS
LOW CLOUDS
catspaw
nibostratus
stratus
cumulus
stratocumulus
cumulonimbus
(thunderstorm)
cirrus
cirrostratus
cirrocumulus
altostratus
altocumulus
As the wind blows across water waves
are created. The stronger the wind and
increased distance across the water
enlarges the wave action.
Other factors that can cause problem
situations for vessels are fog, currents,
and tidal changes.
Fog can develop inland on clear, calm
mornings. Coastal areas see large “blankets” of fog roll
in and stay for extended time periods causing sometimes
hazardous navigation conditions. If you are caught in the
fog, do not panic. Think of the best plan of action and
proceed carefully. If you are limited in navigation
equipment at the first sign of fog proceed to the nearest
shoreline and wait until the fog lifts.
Boats equipped with navigation equipment, local
waterway experience
and charts should proceed to a safe harbor. Use extreme
caution, signal as needed, and reduce to a speed where
you can stop within half of your forward vision range.
If foul weather catches you at sea do the following:
1. Slow down. Proceed with caution and put on your
life vests.
2. Try to reach the nearest safe shoreline.
3. Navigate your vessel slowly into the waves at a 45
degree angle.
4. Passengers should sit low in the center of the vessel.
WAVES & FOG
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