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• To view the weather forecast for the previous 12 hours,

select Previous Forecast or , and to view previous

forecasts, up to 48 hours ago, in 12-hour increments,

select Previous Forecast or again.

Viewing a Marine Forecast or an Offshore Forecast

Select Weather > Forecast.

Pan the chart to an offshore location.

The Marine Forecast or Offshore Forecast options appear

when forecast information is available.

Select Marine Forecast or Offshore Forecast.

Weather Fronts and Pressure Centers

Weather fronts appear as lines that indicate the leading edge of

an air mass.

Front Symbol

Pressure-center symbols often appear near weather fronts.

Pressure-

Description

Center

Symbol

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

Partly cloudy

Cloudy

Windy

Thunderstorms

Smoke (dusty, hazy)

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.

SiriusXM™

Description

Cold front

Warm front

Stationary front

Occluded front

Trough

Symbol Weather

Fair (sunny, hot, clear)

Rain (drizzle, sleet, showers)

Foggy

Snow (snow showers, flurries,

blizzard, blowing snow, sleet,

freezing rain, freezing drizzle)

Wind Barb

Wind Speed

Calm

5 knots

10 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, as shown in the legend.

The wave period indicates the time (in seconds) between

successive waves. Wave period lines indicate areas that have

the same wave period.

Wave directions appear on the chart using red arrows. The

direction of each arrow pointer indicates the direction in which a

wave is moving.

Viewing Forecast Sea Conditions Information for

Another Time Period

Select Weather > Sea Conditions.

Select an option:

• To view forecasted sea conditions for the next 12 hours,

select Next Forecast or , and to view forecasts up to 48

hours, in 12-hour increments, select Next Forecast or

again.

• To view the forecasted sea conditions for the previous 12

hours, select Previous Forecast or , and to view

previous forecasts, up to 48 hours ago, in 12-hour

increments, select Previous Forecast or 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.

Select Weather > Fishing > Menu > Fish Species.

Select a species of fish.

Select On.

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.

Visibility Information

Visibility is the forecast maximum horizontal distance that can

be seen at the surface, as shown in the legend on the left of the

Wind Barb

Wind Speed

20 knots

50 knots

65 knots