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Front Symbol
Description
Occluded
front
Trough
Pressure-center symbols often appear near weather fronts.
Pressure-
Center
Symbol
Description
Indicates a low-pressure center, which is a region of
relatively lower pressure. Moving away from a low-
pressure center results in increased pressure.
Winds flow counterclockwise around low-pressure
centers in the northern hemisphere.
Indicates a high-pressure center, which is a region
of relatively higher pressure. Moving away from a
high-pressure center results in decreased pressure.
Winds flow clockwise around high-pressure centers
in the northern hemisphere.
City Forecasts
City forecasts appear as weather symbols. The forecast is
viewed in 12-hour increments.
Symbol Weather
Symbol Weather
Symbol Weather
Partly cloudy
Rain
(drizzle,
sleet,
showers)
Windy
Thunderstorms
Fair
(sunny,
hot, clear)
Foggy
Smoke (dusty,
hazy)
Snow
(snow
showers,
flurries,
blizzard,
blowing
snow,
sleet,
freezing
rain,
freezing
drizzle)
Cloudy
Viewing Sea Conditions
The Sea Conditions chart shows information about surface
conditions, including winds, wave height, wave period, and
wave direction.
Select Weather > Sea Conditions.
Surface Winds
Surface wind vectors appear on the Sea Conditions chart
using wind barbs that indicate the direction from which the
wind is blowing. A wind barb is a circle with a tail. The line or
flag attached to the tail of the wind barb indicates the wind
speed. A short line represents 5 knots, a long line represents
10 knots, and triangle represents 50 knots.
Wind Barb
Wind Speed
Wind Barb
Wind Speed
Calm
20 knots
5 knots
50 knots
10 knots
65 knots
15 knots
Wave Height, Wave Period, and Wave Direction
Wave heights for an area appear as variations in color.
Different colors indicate different wave heights 
À
, as shown
in the legend on the left of the screen 
Á
.
The wave period indicates the time (in seconds) between
successive waves. Wave period lines 
Â
 indicate areas that
have the same wave period.
Wave directions appear on the chart using red arrows 
Ã
.
The direction of each arrow pointer indicates the direction in
which a wave is moving.
Viewing Forecast Sea Conditions Information for
Another Time Period
1
Select Weather > Sea Conditions.
2
Select an option:
• To view forecasted sea conditions for the next 12
hours, select Next Forecast, and to view forecasts up
to 48 hours, in 12-hour increments, select Next
Forecast again.
• To view the forecasted sea conditions for the previous
12 hours, select Previous Forecast, and to view
previous forecasts, up to 48 hours ago, in 12-hour
increments, select Previous Forecast again.
Viewing Fishing Information
The weather Fishing chart shows present water temperature,
present surface pressure conditions, and fishing forecasts.
Select Weather > Fishing.
Surface Pressure and Water Temperature Data
Surface-pressure information appears as pressure isobars
and pressure centers. Isobars connect points of equal
pressure. Pressure readings can help to determine weather
and wind conditions. High-pressure areas are generally
associated with fair weather. Low-pressure areas are
generally associated with clouds and the chance of
precipitation. Isobars packed closely together show a strong
pressure gradient. Strong pressure gradients are associated
with areas of stronger winds.
Pressure units are shown in millibars (mb), inches of Mercury
(inHg), or hectopascals (hPa).
Colored shading indicates the surface temperature of the
water, as shown in the legend in the corner of the display.
Forecasting Fish Locations
You can show areas that contain optimal weather conditions
for specific species of fish.
1
Select Weather > Fishing > Menu > Fish Species.
2
Select a species of fish.
3
Select On.
4
Repeat steps 2 and 3 to show areas with optimal weather
conditions for additional species of fish.
Shaded areas indicate optimal fishing areas. If you have
selected more than one species of fish, you can select a
shaded area to view the fish species that are included in
the shaded area.
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