Big Fat High to round out May

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Razor
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Big Fat High to round out May

Unread post by Razor »

With all the doom and gloom threads of massive lows its very pleasing to report that a massive anticyclone looks set to dominate porceedings from an extended period from later this week.

Good news, there are areas around the place that really need to dry out!
Last edited by Razor on Wed 20/05/2009 09:25, edited 1 time in total.
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Re: Big Fat High to round to round out May

Unread post by Myself »

Inland South Island will barely dry out at all with something like that. Low sun angle, pretty much no wind, all it's going to do is lock a lot of cold air in near the surface. The result will likely be crisp sunny days at first, with hard frosts and daytime highs struggling around single digits. I imagine it would get increasingly dirty as it hangs around, meaning there could be a fair bit of fog or low cloud.
Well, much of that is speculative forecasting, but it's hardly a good situation for drying out the high country.
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Re: Big Fat High to round to round out May

Unread post by spwill »

but it's hardly a good situation for drying out the high country.
Will allow river flows to drop, save the likes of Qtwn from another flood. :smile:
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Re: Big Fat High to round to round out May

Unread post by Razor »

Spot on Spwill...thats my point
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Re: Big Fat High to round to round out May

Unread post by melja »

And frosts are very good at drying things out to.
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Re: Big Fat High to round to round out May

Unread post by Storm Struck »

Your a weather enthusiast and at a time like this you are looking forward to a High [-X , how boring.
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Re: Big Fat High to round to round out May

Unread post by southernthrash »

melja wrote:And frosts are very good at drying things out to.
Frosts are quite inefficient at drying things out. It is often said that frosts "dry out" snow, all that is happening is the liquid water in the snow matrix is being refrozen...

There was never any real risk of flooding in Queenstown (although the shotover was looking good on Sunday morning).
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Re: Big Fat High to round to round out May

Unread post by Razor »

Jasestrm wrote:Your a weather enthusiast and at a time like this you are looking forward to a High [-X , how boring.
Cheers
Jason.
Jason- I work with a lot of high country farmers whose income streams are at the mercy of severe weather events. So after all this water charging through up there over the past month a good dry out is well and truly in order, for the sake of the economic well being of a great many families
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Re: Big Fat High to round to round out May

Unread post by waterboy »

Razor wrote:
Jasestrm wrote:Your a weather enthusiast and at a time like this you are looking forward to a High [-X , how boring.
Cheers
Jason.
Jason- I work with a lot of high country farmers whose income streams are at the mercy of severe weather events. So after all this water charging through up there over the past month a good dry out is well and truly in order, for the sake of the economic well being of a great many families
Dont worry later the farmers will be complaining about a drought or snow falls. :lol: :B
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Re: Big Fat High to round to round out May

Unread post by Storm Struck »

Fair enough i see your point and know what it means to farmers etc, even with winter crops it can be a tough time so settled weather can be welcome sometimes.
Shouldnt have said that sorry :-# :-( .
They might want to be watching for the hail in any thunderstorms that could occur tomorrow, preparing to cover crops if necessary.
Cheers
Jason.
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Re: Big Fat High to round to round out May

Unread post by Razor »

Indeed- I know sites like this are a useful monitoring forum for them.
I laughed when someone referred to this as a snow church!
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Re: Big Fat High to round to round out May

Unread post by southernthrash »

That was Gary's mate
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Re: Big Fat High to round to round out May

Unread post by tgsnoopy »

Gee, why does everyone seem to like bashing Gary so much?

Poor blokes not even here to upset anyone or defend himself even.
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Re: Big Fat High to round to round out May

Unread post by Michael »

Dont mean much better here unless the high is pushed south by a sub tropical low.
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Re: Big Fat High to round to round out May

Unread post by NZ Thunderstorm Soc »

Oh a Big fat high, that's nice :D
..better up and sign on with the NZAAA, they're looking for members :lol:

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Re: Big Fat High to round to round out May

Unread post by sw_windbow »

This thread reminds me of this thread:

http://www.weatherforum.org.nz/phpBB3/v ... =21&t=3076
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Re: Big Fat High to round to round out May

Unread post by Michael »

not an exciting high yet,just horrible and windy and if not SW it will be Bee bop while it stalls in the tasman all week.
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Re: Big Fat High to round to round out May

Unread post by Vertigo »

highs are never really exciting, unless they are moving away
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Re: Big Fat High to round to round out May

Unread post by melja »

southernthrash wrote:
melja wrote:And frosts are very good at drying things out to.
Frosts are quite inefficient at drying things out. It is often said that frosts "dry out" snow, all that is happening is the liquid water in the snow matrix is being refrozen...

There was never any real risk of flooding in Queenstown (although the shotover was looking good on Sunday morning).
Frosts bring moisture to the surface of the ground were it can be removed better by wind and sun.
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Re: Big Fat High to round to round out May

Unread post by southernthrash »

That effect is very minor (some doubt whether it happens at all). Almost all the moisture that freezes during a frost is condensed out of the air. Even if that water was being drawn up through the soil, my own experience tells me that evaporation is minimal. Even on a bright, fine, sunny day following a frost (in Southland at least) there is barely enough energy for much evaporation to occur. Dew (thawed frost in this case) may persist through to the following evening, adding to the total water available to freeze, and creating some very interesting conditions.

I mean, if frosts bring moisture to the surface, how would you explain the fact that cars are often the first objects to develop a dew coating and freeze? It is because they undergo faster radiative cooling than the adjacent ground surfaces, promoting more rapid condensation.
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Re: Big Fat High to round to round out May

Unread post by Manukau heads obs »

one thing, cold polar outbreaks bring low dew point air
i.e low humidity as the day warms up ,i.e in fact good drying
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Re: Big Fat High to round to round out May

Unread post by southernthrash »

The two main requirements for evaporation are heating and mixing. Mixing being the wind, so yes, but accompanied by lower amounts of solar radiation (less energy), although this no longer relates to frosts... Diffusion is, again, a minor effect.
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Re: Big Fat High to round to round out May

Unread post by gllitz »

southernthrash wrote:The two main requirements for evaporation are heating and mixing. Mixing being the wind, so yes, but accompanied by lower amounts of solar radiation (less energy), although this no longer relates to frosts... Diffusion is, again, a minor effect.
So a question, then (I'm not stirring, here, I *am* actually curious)...Would the above, then, explain why washing tends to dry faster on warm + windy dry days as opposed to cold + windy dry days? Or maybe not...? :wave: :crazy:
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Re: Big Fat High to round to round out May

Unread post by CHCH Weather Chaser »

The high doesnt look as if it is going to help eastern areas too much with this showery weather looking to last till Sunday now.
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Re: Big Fat High to round to round out May

Unread post by southernthrash »

gllitz wrote:
southernthrash wrote:The two main requirements for evaporation are heating and mixing. Mixing being the wind, so yes, but accompanied by lower amounts of solar radiation (less energy), although this no longer relates to frosts... Diffusion is, again, a minor effect.
So a question, then (I'm not stirring, here, I *am* actually curious)...Would the above, then, explain why washing tends to dry faster on warm + windy dry days as opposed to cold + windy dry days? Or maybe not...? :wave: :crazy:
Yes exactly. Washing will dry more quickly on a windy warm day than a still warm day too.
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