Author Topic: Humminbird Weather Sense Q&A  (Read 9801 times)

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Offline RGecy

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Humminbird Weather Sense Q&A
« on: May 07, 2009, 01:20:18 PM »
Submitted by Keith Councell

Weather Sense 
All Humminbird Fishing Systems are ready to connect to WeatherSense Fishing Condition Monitor so you can adapt your tactics to changing weather that impacts fish. WeatherSense provides increasing or decreasing barometer trends on a full screen view or as a digital readout on your sonar screen if you choose. An internal battery and smart monitoring system always logs the last 12 hours of the barometric pressure, so you'll start the day with accurate, up-to-date trend information.

What are some general guidelines about barometric pressure?
As a general guideline, think of 30 inHg (1016 millibar) as being a normal level. World records vary from a high pressure of 32.0 inHg in Siberia to 25.7 inHg during a typhoon (both readings are off the scale of most barometers). For the US, extreme levels can be considered as 30.5 inHg and 28.5 inHg.

When does barometric pressure come in to play with Fishing?
The effects of barometric pressure is greater in fresh and shallow waters, than it is in deeper waters. This is due to the fact that the pressure of water is so much greater in deeper waters making the air pressure above it no longer having any significance.

Does actual barometric pressure actually play a factor?
There is a decent amount of debate over this. But some facts that everyone agrees on is that the changes that come with a rise or fall of the pressure do have an effect of fishing, these changes include cold fronts, warm fronts, wind, and precipitation. Many believe that when it comes to fishing, a change of just +/- 0.02 inHg from normal is enough to affect their feeding habits.

Rules of thumb
Pressure Raising - This rising pressure condition may cause fish to go dormant, move closer to structure and become extremely hard to catch.
Falling Barometer - The falling pressure condition may, which occurs ahead of a major front. This means that fish may feed aggressively, under these conditions.
Steady Barometer - Under a steady pressure conditions, fish behavior is usually unaffected.


What can I do to get a more accurate reading out of the Humminbird WeatherSense?
One item has a major affect of the barometric pressure and that is altitude. There are two ways to adjust this to a good value. One is by researching the area you are about to fish in. The second way is by using the GPS function in you unit to get an altitude reading. On the GPS diagnostic view there is a box called altitude. A note when using GPS altitude it is best to wait 10-20 minutes before taking the value of the altitude. The reason is that GPS takes about 10-13 minutes to gather enough back data to have the best possible fix. In the main menu- accessory tab is the WeatherSense options.

« Last Edit: May 07, 2009, 01:23:22 PM by RGecy »
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