Author Topic: Atmospheric pressure and fishing  (Read 70386 times)

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Offline Mussel Cracker

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Re: Atmospheric pressure and fishing
« Reply #20 on: August 09, 2012, 07:32:04 PM »
@karpenta...I agree with you 100%...


Pressures count for a lot but you could have the best pressures which far as I am concerned above 1018 and have really bad fishing cause there is a strong sw blowing which is opposite to the natural current along our coast line and that will just slows the current and with a mix up of the turning current and the wrong winds with the perfect pressure the fish won't bite..


So to get that perfect day is almost impossible..rite pressures , rite wind , rite current and water temperature its not going to happen to often....and that makes the difference between an average fisherman and a brilliant fisherman cause even on a bad day the brilliant fisherman will catch fish...and far as I am concerned as an average fisherman it comes down to many hours on the water and continuously trying something new
No fish is to big for the Boksburg bomber..!

Offline Spieks

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Re: Atmospheric pressure and fishing
« Reply #21 on: April 24, 2014, 08:19:35 AM »
I might have missed it in here somewhere, but what would be considered a high barometric press and what would be a low....?
 
1000 and below will be low and a 1010 and above high...? :dunno:

Offline Kent

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Re: Atmospheric pressure and fishing
« Reply #22 on: April 24, 2014, 11:05:02 AM »
 :-) ..Something I firmly believe in is a trend...I have kept a fairly up to date diary of my outings/trippies as to the conditions ..ie ..baro..water temp..wind ..tide and colour of the water....What Ive picked up over 7 years of this record keeping that those five things I mentioned are aligned I have had a HIGHER success rate of hooking and landing kob on spoon...I know this is specific ...BUT one can note for any target species and your own area...For me and my East Coast its these 5....Baro rising and topping out at 30.3inches or 1021hpk....outgoing tide with 3 hours to low.....a water temp of around 18/19....a slight west wind moveing into a full east and a nice clear sea with lotsa working water...This is a trend I noticed when Ive caught the most kob....NOW , I am also not saying you wont catch in adverse conditions coz fish do eat...BUT...by noting you most productive conditions , one can then optimise your fishing time as we all have other irritating things to do than fish..LOL.........This works for me and of course time spent at the water with a line in the water does help!!!!
Just GO FISH!!!


Offline MichaelK

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Re: Atmospheric pressure and fishing
« Reply #23 on: April 24, 2014, 11:50:12 AM »
This is a topic i know very little about and i'm enjoying all the infomation


My question to you boys, does the atmospheric pressure increase or decrease just before a strong south wester?


So is it good fishing or bad fishing just before the big blow?
« Last Edit: April 24, 2014, 11:51:12 AM by MichaelK »

Offline Kent

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Re: Atmospheric pressure and fishing
« Reply #24 on: April 24, 2014, 12:17:27 PM »
This is a topic i know very little about and i'm enjoying all the infomation


My question to you boys, does the atmospheric pressure increase or decrease just before a strong south wester?


So is it good fishing or bad fishing just before the big blow?
:-) ...Michael , in my humble opinion , and here again , Im speaking from my experiences and my piece of coast line.....When I see the glass falling rapidly i get excited coz that means a west is on its way....a west , here , cleans up the sea and brings in the slightly warmer water...THE moment that glass starts to turn a rise...I get my kit ready.....and when it gets to that 1000hpk mark I start checking tides out and where to go gooi.....So , I know this is not answering your question , BUT , it will start giveing you an idea as to what works for your specific area and what doesnt...BUT...as a very general rule of thumb , when the the baro is already falling the fish tend to go deeper...BUT...here again , fish still eat...Like I said before , check your areas out and make notes...it does help...
Just GO FISH!!!


Offline Lucky Hook

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Re: Atmospheric pressure and fishing
« Reply #25 on: April 24, 2014, 02:32:02 PM »
Think it was posted before but the CSIR linked website with weather bouy off Durban gives atmospheric pressure in graph format - can see if pressure is falling, rising or constant. Site also gives swell height direction etc.

http://wavenet.csir.co.za/OnlineData/Durban/durbanweatherD.htm

Offline Walt

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Re: Atmospheric pressure and fishing
« Reply #26 on: April 24, 2014, 03:04:25 PM »
Sorry,just on my way out.Wife bought me this barometer below about 7 years ago.I find Weather Forcasts are regularly wrong and I regularly prove them wrong by virtue of barometer readings which are far more accurate than forcasts.I tap mine everyday,every night to check what's heading our way.
 
Briefly,will come back to this,but Bear in mind,there's a window period,whereby Barometer will normally offer whats happening in next 48 hrs.
 
When barometer falls below 1000,and definitely at 950,a storm is heading our way.I don't have time to go into in depth,as wifey's waiting. Saw big storm coming 2 or 3 years ago,which created carnage at Cape Point and surrounds,barometer fell out of bed.
 
Great anglers have built in barometer,know the signs,will elaborate later on this.
 
Briefly my best fishing has been on drop,as this is future weather coming in,fish go on frenzy feeding and thereafter disappear.At home,ants,roaches,all come out the woodwork at barometer drops,and then just disappear the next day.So,fish are similar.I often know more about weather,prospects for fishing with watching action of pests,watching nature,like birds,which fly away,flies suddenly disappear,etc,etc.
 
Birds at home,lots of them suddenly appear in our trees to accumulate food,geese come up from our vlei,due to high water tables they know are coming,frogs arrive in swimming pool,moving away from Sandvlei where water levels will rise.
 
So,there's lots of variables,signs,and apologies if anything said here is repetition of what others have said.Just came across this topic,haven't read it,No disrespect intended.
 
This is not something that can be covered in 2 sentences,but with combo of reading the signs and barometer,etc,one can know a lot more about what's on the cards,but window period is what matters.If barometer hits a low say as I'm writing this,I would normally have caught fish at Macs today,but should barometer remain low for another day,I would blank tomorrow.
 
Apologies,this was somewhat rushed,but it really is a compelling & interesting,could not ignore it with wifey chasing me on here,and personally,best gift I ever got was this barometer that wifey bought me.
 
 
 
 
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Offline Walt

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Re: Atmospheric pressure and fishing
« Reply #27 on: April 24, 2014, 03:09:22 PM »
Barometer was bought from 'De Villiers & Sons.
 
Phone nr is 021/712 0616
 
Address is 6 Joubert Close,Tokai,Cape Town
 
Be Warned,wife just told me 'Those Barometers are not cheap',as she pulls me out the front door by my earlobe :hehe:
Whats Diffs between 6 Elephants&Half Doz Eggs?
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Offline chrisquinton

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Re: Atmospheric pressure and fishing
« Reply #28 on: April 24, 2014, 03:11:44 PM »
This is a topic i know very little about and i'm enjoying all the infomation


My question to you boys, does the atmospheric pressure increase or decrease just before a strong south wester?


So is it good fishing or bad fishing just before the big blow?

MichaelK, here in Durban, our average pressure is 1013mb.
to answer your question, the pressure drops before the SW.
Typically (in DBN), our coastal lows bring NW and sunny skies ahead of the SW. As the SW hits, the barometer will rise considerably and rain usually follows. The lower the barometer ahead of the system, the more severe winds you might expect at the onset of the SW.
I Check out Windgugu for all this info (includes barometric pressure).
example of the SW forecasted this weekend, although the wast that came through recently has already raised the baro a little...the first half of the table below shows SW on sunday am at 12kts, up to 21kts by 11. On the right, look at the blue line. thats pressure, changing from around 1010mb on sat evening to a027mb on sunday evening. cloud cover and precipitation are indicated as well. visit windguru and check it out...
« Last Edit: April 24, 2014, 03:16:03 PM by chrisquinton »

Offline chrisquinton

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Re: Atmospheric pressure and fishing
« Reply #29 on: April 24, 2014, 03:18:31 PM »
Walt, you are correct.
on a dropping barometer ahead of the west (rise), and even at the onset of the west, you will do some  (bat

Offline Kent

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Re: Atmospheric pressure and fishing
« Reply #30 on: April 24, 2014, 04:31:25 PM »
 w;k ..Over the years ...the fish(not many :hehe: )..that Ive caught , 95% of them have been on a rising glass , Sooo...If I was a betting man and it was down to a baro reading whether I go gooi or not ...I would go on a rising glass every time......BUT...IF you go for sharks , rays etc...these dont seem TOO effected by barometric/air pressure.......
Just GO FISH!!!


Offline Kent

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Re: Atmospheric pressure and fishing
« Reply #31 on: April 24, 2014, 04:33:11 PM »
Oh...and a steady baro ...say over a 72 hour period ...is almost always not good fishing , well maybe NICE weather , but not good catching...BUT...fish still eat....
Just GO FISH!!!


Offline ardinn

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Re: Atmospheric pressure and fishing
« Reply #32 on: August 18, 2018, 07:21:10 PM »
Put together a guide on this recently - Hope it helps explain in a bit more detail!


https://slaneyfishing.com/barometric-pressure-fishy-myth-untapped-resource/

Offline REEFMAN

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Re: Atmospheric pressure and fishing
« Reply #33 on: August 19, 2018, 10:15:59 AM »
Great post. Thanks for sharing!

Offline colin

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Re: Atmospheric pressure and fishing
« Reply #34 on: August 19, 2018, 01:48:42 PM »
 :tkx:  enjoyed the read  :toppie:
My wife allows me to keep all the fishing tackle I can hide.

Offline adam

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Re: Atmospheric pressure and fishing
« Reply #35 on: August 19, 2018, 04:07:10 PM »
Very interesting read! Thanks.
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Offline CRANKMAN

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Re: Atmospheric pressure and fishing
« Reply #36 on: August 24, 2018, 11:02:53 AM »
I agree that atmospheric pressure seems to affect fishing - but I doubt it is as simple as the quoted article states.

My main reason for doubt is based on the weight of water versus air.

The weight of all the air above the water (at sea level) is 1 atmosphere or to make it a bit easier to understand about 1015 mb (milibars).
A big fluctuation in pressure (enough to impact fishing) is around 5 mb.


Above the water this is a fairly substantial change.
Below the water this change can be achieved by varying your depth by only 5 cm!

If fish vary their depth to compensate for atmospheric pressure changes, they would seldom have to change their depth by more than 3 or 4 cm to stay equalized.

If a fish dives 10 metres it will experience double the pressure that it would have at the surface, so I doubt the daily fluctuations of 3 - 5 mb (less than 0.005% of this) would impact it's comfort.
« Last Edit: August 24, 2018, 11:24:54 AM by CRANKMAN »
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Offline colin

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Re: Atmospheric pressure and fishing
« Reply #37 on: August 24, 2018, 02:25:21 PM »
I cannot fault Crankman's reasoning or arithmetic  :bow: . Perhaps one of our members can shed light on the matter . :toppie:
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Offline hookedon

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Re: Atmospheric pressure and fishing
« Reply #38 on: August 24, 2018, 04:18:25 PM »
Just asking , is atmosheric pressure at sealevel 1013 or 1015


Enjoy all discussions involving weather and conditions and WHY they happen

Offline hookedon

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Re: Atmospheric pressure and fishing
« Reply #39 on: August 24, 2018, 05:01:08 PM »
And can someone please explain something to me


Although i dont understand much , i try to go to synoptic charts once a day just to try and get the " bigger picture " of our weather, but what does that thickish line on top or in front  of a low pressure system- with the teeth sticking out, means.


Do that imply the severity of the cold front ,  or what?


Also, in some LPS, the " rings" around the LPS, seems closer than in other systems, what does that imply.


I did try Prof Google, but you know if you dont know what youre asking, he wont help :hehe:

 

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