barometric pressure.....????

[shovelmouth83]

https://www.arkansasstripers.com/how-does-barometric-pressure-affect-fishing.htm?fbclid=IwAR08KsR4hNNtJ_hDDp_D1g4xw-27evm0RlE1H4ewhNxtnrJvITYoVTcwsW0

 

so i was browsing face book and i came acroos this i have not seen any info like this it has opened my eyes a lot. just let me know how it has helped or if you knew already.

 

tight lines......

[Brad Reid]

Barometric Pressure has absolutely zero direct effect on bass. Zero. Even a large swing of a full point, say 29.50 to 30.50, on pressure readings means a fish has to make the tiniest of depth adjustments to offset the change.

 

Bass and other fish swim around all day at various depths, up and down, up and down, deep to shallow and back, to degrees that far, far exceed the tiny differences in atmospheric pressure pushing down on water. There is a column of air 60 or so miles in size to create 1 atmosphere of pressure at sea level. Water? 33 +/- feet to add a second atmosphere.

 

What it (atmospheric pressure) does do is reflect what weather patterns we see, what we are in. Here, we do know, emphatically, that fishing changes with clear skies versus cloudy/gloamy days, windy days versus dead air days, cold days versus warm days and more, that these do affect fish behavior.

 

I'll share the math of the actual distance a fish has to "adjust" in the water column to offset a particular quantity of added air pressure if anyone wants to see it.

 

Brad

[shovelmouth83]

that would be awesome.

[Team9nine]

The old barometer debate ? Believe the math works out to about 16" or so in extreme examples, less than half that under normal pressure changes.

 

Let's get ready to rummmm-bleeeeee 

[Brad Reid]

I should be less "strident" about it; it just hurts to see it over and over. But, the original post was in good faith. It is a common topic. I have even read articles by scientists whom should know better and yet they give it credence, but they just haven't done the math or don't understand the logic.

 

Stats:

 

Barometric Pressures and equivalent related water depths in "feet of water":

29.50 = 33.422'
29.92 = 33.898' (one atmosphere)
30.00 = 33.989'
30.50 = 34.555'
 

As you stand on the edge of a pool, you are standing in 1 atmosphere of pressure, all from air. It is about 14 lbs. per sq. inch. or so pressing in on you. If you dive into the pool and swim down a little over 33 feet, the water has added another "atmosphere" of pressure, this from water. You are now experiencing 2 atmospheres of pressure: one from the air, another one from the water. Almost all people feel a huge amount of pressure in their ears, even at lesser depths.

 

Water is not very "compressible," so the added pressure is very linear. A one point move up in air pressure can be offset by moving up in the water column by 1.13 feet.

 

Bass cover more vertical distance than this . . . all day long. Barometric Pressure readings don't move all that fast except in rare circumstances. Even then, it wouldn't make any difference.

 

Here's the issue: how does a bass "differentiate" the pressure it experiences from a high pressure system moving in and, say, raising pressure from 29.50 to 30.50 pushing down on water  . . . from the pressures a fish experiences all day long just swimming around? 

 

It has always been about the weather.

 

Brad

[MassYak85]

Let's think about this:

 

Let's say a HUGE atmospheric pressure change happens (1 inch of mercury atm pressure change --> About 0.5 PSI). That same pressure change would only require the fish to move vertically in the water column about a foot to feel the same pressure change. In essence unless the fish is completely motionless in the water for days at a time they aren't going to notice atmospheric pressure changes since it pales in comparison to depth changes. 

 

I only pay attention to it in terms of how it relates to changes in weather. Often a sharp barometric pressure change can mean a front is moving through which can issue in changes in temperature, rain/storms/wind, or light levels (clouds). Those things are tangible environmental changes to the fish. Barometric pressure changes probably aren't...unless that fish has literally been sitting 

[soflabasser]

I have noticed that I have done better than average when the barometric pressure is dropping, both in freshwater and saltwater fishing.

[islandbass]

10 hours ago, Brad Reid said:

Barometric Pressure has absolutely zero direct effect on bass. Zero. Even a large swing of a full point, say 29.50 to 30.50, on pressure readings means a fish has to make the tiniest of depth adjustments to offset the change.

 

Bass and other fish swim around all day at various depths, up and down, up and down, deep to shallow and back, to degrees that far, far exceed the tiny differences in atmospheric pressure pushing down on water. There is a column of air 60 or so miles in size to create 1 atmosphere of pressure at sea level. Water? 33 +/- feet to add a second atmosphere.

 

What it (atmospheric pressure) does do is reflect what weather patterns we see, what we are in. Here, we do know, emphatically, that fishing changes with clear skies versus cloudy/gloamy days, windy days versus dead air days, cold days versus warm days and more, that these do affect fish behavior.

 

I'll share the math of the actual distance a fish has to "adjust" in the water column to offset a particular quantity of added air pressure if anyone wants to see it.

 

Brad

Awesome! I’ll be looking for to seeing the figures. Me likes math, lol. 

 

Update: I posted before seeing your next post. Thanks !

[Catt]

Threads on temperature + barometric pressure = winter ?

[Brad Reid]

9 hours ago, MassYak85 said:

Let's think about this:

 

Let's say a HUGE atmospheric pressure change happens (1 inch of mercury atm pressure change --> About 0.5 PSI). That same pressure change would only require the fish to move vertically in the water column about a foot to feel the same pressure change. In essence unless the fish is completely motionless in the water for days at a time they aren't going to notice atmospheric pressure changes since it pales in comparison to depth changes. 

 

I only pay attention to it in terms of how it relates to changes in weather. Often a sharp barometric pressure change can mean a front is moving through which can issue in changes in temperature, rain/storms/wind, or light levels (clouds). Those things are tangible environmental changes to the fish. Barometric pressure changes probably aren't...unless that fish has literally been sitting 

Sure, MassYak85 has it right. It isn't even remotely possible that a bass can "differentiate" from the pressure variances it feels . . . all day long, day in and day out . . . just living its normal life, from pressure changes from air pressing down on water. In both cases, by the depth it finds itself in, or from air pressure forces, it has to make the slightest of depth changes to get comfortable. 

 

It is all about the weather changes that accompany changes in air pressure.  Brad

[greentrout]

 

[scaleface]

I have no  idea how barometric pressure effects fish and have never consulted it  .

[813basstard]

The pressure you feel when you got drunk and watched the game over washing the cars.

[Team9nine]

"One of the most persistent myths in fishing is that barometric pressure controls the activity of bass and other gamefish. Although many researchers have tried, scientific studies have been unable to demonstrate that such a relationship exists. Every scientific report we’ve seen, in which barometric pressure was studied, reached a similar conclusion: no direct relationship is evident."

 

-Ralph Manns

 

For the full story, see: IF - Barometric pressure and bass

 

 

Josh Alwine came to a similar conclusion in his recent book (Lunker Lore) after statistical analysis of another set of data:

 

"What the findings indicate first and foremost is that a great many fish are caught across the full spectrum of barometric pressure...stability in weather has far greater impact on catch rates than any normal changes in weather."

 

What is always interesting to me is that the scientific side of the argument says no effect, while it is well noted that most recognized big fish experts (and many other local experts) are convinced there is one (an effect).

[Scott F]

51 minutes ago, Team9nine said:

What is always interesting to me is that the scientific side of the argument says no effect, while it is well noted that most recognized big fish experts (and many other local experts) are convinced there is one (an effect).

You could say exactly the same thing about moon phases. 

[soflabasser]

2 hours ago, Team9nine said:

What is always interesting to me is that the scientific side of the argument says no effect, while it is well noted that most recognized big fish experts (and many other local experts) are convinced there is one (an effect).

I will pay more attention to the big fish experts than pay attention to the scientist when it comes to catching big fish.Knowing the biology of bass does help but it does not compare to someone who has lots of experience catching lots of big bass in a particular body of water. With that said I have noticed better than average bass fishing and saltwater fishing when the barometric pressure is dropping. Also noticed the bass biting better during certain moon phases in specific times in the year. But what do I know, I have only caught a couple double digit bass and lost count of the 8 pound or better largemouth bass I have caught in the +2 decades I have fished for bass.

[shovelmouth83]

1 hour ago, Scott F said:

You could say exactly the same thing about moon phases. 

i dont even want to start that one.. ?

[TnRiver46]

I know, for a fact, without a shadow of a doubt ........ 

 

that I have a pretty cool barometer that was my

grandparents . That is all. 

[Tennessee Boy]

Barometric pressure affects bass because they don’t have eye lids.....no wait I think I’m getting my fishing myths confused.?

[Catt]

20 hours ago, Team9nine said:

stability in weather has far greater impact on catch rates than any normal changes in weather."

 

 

I don't care what the ambient temperatures are, I don't care what the barometric pressure is doing, I don't care what moon phase it is, I don't care what season it is.

 

Give me three days of stable (unchanging) weather & it's on!

[greentrout]

Farmer's Almanac...

 

https://www.farmersalmanac.com/fishing-weather-time-26873

 

good fishing...

[MIbassyaker]

22 hours ago, soflabasser said:

I will pay more attention to the big fish experts than pay attention to the scientist when it comes to catching big fish.Knowing the biology of bass does help but it does not compare to someone who has lots of experience catching lots of big bass in a particular body of water. With that said I have noticed better than average bass fishing and saltwater fishing when the barometric pressure is dropping. Also noticed the bass biting better during certain moon phases in specific times in the year. But what do I know, I have only caught a couple double digit bass and lost count of the 8 pound or better largemouth bass I have caught in the +2 decades I have fished for bass.

Suit yourself, but bass do not break the laws of physics.

[Catt]

2 hours ago, MIbassyaker said:

Suit yourself, but bass do not break the laws of physics.

 

Don't know a single bass that has ever attended a physics class!

 

Physics is the natural science that studies matter and its motion and behavior through space and time and that studies the related entities of energy and force.

 

Ya might wanna use a different word ?

[WRB]

After years of some practical experiences I came to the conclusion barametic pressure affects me more them it does fish. Falling barametic pressure indicates a low pressure system is approaching with wind rotation counter clockwise bring clouds and possible rain, temperatures usually drop. All this is happening above water in the atmosphere where we live, not below the water where fish live. Lower light conditions give predator fish like bass the advantage over prey and they take advantage. 

Rising barametric pressure means high pressure system with wind rotating clockwise is pushing the low pressure system away, bringing wind in the opposite direction and clear bright sunlight, again above the water. Predator fish feed during the low light low pressure system and now have bright light and changing winds, no reason to be active.

Me on the other hand the changing pressures affects my bones and wind with bright sun  affects my desire to go fishing.

Tom

[TnRiver46]

8 minutes ago, WRB said:

After years of some practical experiences I came to the conclusion barametic pressure affects me more them it does fish. Falling barametic pressure indicates a low pressure system is approaching with wind rotation counter clockwise bring clouds and possible rain, temperatures usually drop. All this is happening above water in the atmosphere where we live, not below the water where fish live. Lower light conditions give predator fish like bass the advantage over prey and they take advantage. 

Rising barametric pressure means high pressure system with wind rotating clockwise is pushing the low pressure system away, bringing wind in the opposite direction and clear bright sunlight, again above the water. Predator fish feed during the low light low pressure system and now have bright light and changing winds, no reason to be active.

Me on the other hand the changing pressures affects my bones and wind with bright sun  affects my desire to go fishing.

Tom

You mean to tell me there are low pressure systems in SoCal? Once or twice a year, maybe? Haha