Page 2 of 278 < 1 2 3 4 ... 277 278 >
Topic Options
#65683 - 12/07/2005 21:11 Re: Perth and WA day to day weather
Lert Offline
Member

Registered: 17/02/2003
Posts: 377
Loc: Duncraig
Good question TH, the Perth site is probably about 20km from the coast and seems to be 1 or 2 degrees cooler than previous recording locations. My place is 3km from the coast and my min. this morning was 3 deg. and zero on the grass. As you say Rotto was relatively warm and this was due to the wind being at least 10 knots whereas the Perth site was calm.. It seems to me that the nocturnal radiation only occurs over the land and the inversion breaks up over the water over a short distance.
I used to wonder 'where does the wind go at night?' so while near the Stirling Ranges on a dead calm night took a drive up to the Bluff Knoll carpark and sure enough, blowing about 15 knots.. The wind due to pressure gradient stays the same only above the inversion..

Anyway, thats my take on it..

Top
#65684 - 13/07/2005 10:54 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
The situation of the Perth AWS is (apparently) in a bit of a dip which would explain the relatively low temps it gets. When I was living in Yokine I was getting similar temps as the AWS which would have been 3-4 ks away and I also was in a dip, now I have moved and I am a bit higher up the last week or so I have consistantly been 1-2C higher than the Perth Metro site.

The effect of the ocean can be seen with the comparison between Swanbourne and other inland sites too, it is consistantly 2-4C higher on cold nights. Rottnest not only has the ocean as Lert said the wind is usaully stronger out there and I think the AWS is a bit higher than the surrounding area as well.

As far as the Melbourne City site, it is understandable that this doesnt get that cold, it is situated just a few meters from roads and the city buildings which would keep the heat of the day in and not allow too much to escape at night, also it isnt in a ditch, it is quite high compared to the CBD and such. I think on frosty nights the further you get out of the CBD in Melbourne the lower the temps are, I notice the airport gets a lot colder overnight.

Oh yeah almost forgot about Perth, had a semi decent amount of rain at my place, 15mm overnight, though the metro site has only got 8.8mm, how did you go Lert?

Top
#65685 - 13/07/2005 11:55 Re: Perth and WA day to day weather
Lert Offline
Member

Registered: 17/02/2003
Posts: 377
Loc: Duncraig
Hi Tim, I had about the same as you..my 'gauge' registered 16.5mm to 9am. Probably get a few more today from passing showers..

Top
#65686 - 15/07/2005 17:20 Re: Perth and WA day to day weather
vinny Offline
Member

Registered: 01/06/2005
Posts: 1069
Loc: Perth (Southern Suburbs)
It is kind of weird with perths weather at present. Most of the heavy rain came in May and now we are getting similar to what last year we got in september and october. The cold fronts are not as strong and the highs are much stronger some at 1030+++

ASo far about 30mm but should get 171???

Lucky though that perth is warmer than adelaide at present??!!!!

Top
#65687 - 15/07/2005 17:22 Re: Perth and WA day to day weather
vinny Offline
Member

Registered: 01/06/2005
Posts: 1069
Loc: Perth (Southern Suburbs)
Should get 21 degrees next week belive it or not!!!

Top
#65688 - 16/07/2005 17:35 Re: Perth and WA day to day weather
Chaser80 Offline
Member

Registered: 16/07/2005
Posts: 164
Loc: Floreat, Perth, W.A.
Hey there Guys, just found this forum and Ive been on weatherzone silver for 3 years! shocked anyways, its great to see that there are others in Perf keen on weather, maybe we could go chasing some day?

Yes its been freezing recently. I live just behind Challenge Stadium, and the coldest Ive got here is 2.9 deg on the 7th at 6.31am. heavy frost in surrounding areas tho. But i think this cold weather sucks! :p

Oh and it doesn't look like we will get above average rainfall in July as we have in May and June either!

Top
#65689 - 16/07/2005 18:35 Re: Perth and WA day to day weather
Lert Offline
Member

Registered: 17/02/2003
Posts: 377
Loc: Duncraig
G'day there Chaser..welcome to the forum..well the wx was beaut today with some towering Cu and what I know as 'rockets' from time to time. I'm not sure what the real name is but they are extra vertical development from the top of a Cu going to around something like twice the vertical development of the Cu. Maybe someone can fix me up with the real name..

Top
#65690 - 17/07/2005 13:59 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Yeah Welcome Chaser, always good to see more perthites on the forum!

Hey Lert I noticed those nice looking cu's too, I think the proper name for the excessive vertical development is castellanus, becuase they look like castle towers, makes sense smile Looked very impressive at sunset too with them lit up by the setting sun.

Well we do have some weather coming up in Perth soon, got a cold front coming through midweek that will probably get grinded almost to death by the monster high forecasted to form over the eastern states, but hopefully it will still be strong enough to deliver some decent rain by the time it gets to us. July is on track for a very dry month indeed, will take a far bit even to make it halfway to the average for the month.

Top
#65691 - 17/07/2005 21:55 Re: Perth and WA day to day weather
Chaser80 Offline
Member

Registered: 16/07/2005
Posts: 164
Loc: Floreat, Perth, W.A.
Hey it's 19.30 on sunday and already 9 deg! Mad. it's gonna be a cool one.

Yesterday between 1600 and 1830 Dally got 13mm from that mid level disturbance. Yup great Cu's sat evening up north. I really can't wait till the summer gets here so we can all see more of them!

Hey Im gonna buy a LD-250 lightning detector from Boltek in the states for the next storm season....(cheaper than the Weather Shop) and with Weather display, may be able to have it live on the net. Would anyone be interested in having it on the net?

Top
#65692 - 18/07/2005 10:41 Re: Perth and WA day to day weather
fug81 Offline
Junior Member

Registered: 15/06/2003
Posts: 12
Loc: Perth, southern suburbs
2.1 in the city, 0.0 at Jandakot. Nice.

Top
#65693 - 18/07/2005 10:57 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Yeah I dont know about nice fug81, I prefer rain and lots of it! smile Although this front on Wednesday doesnt look like getting too far with the concrete wall, aka the eastern states high in its way, there looks as though there might be a few follow up fronts which might deliver the goods.

Chaser80: I think all of us in WA would be very interested in a website showing live lightning data, I know the WZ one is useless, never shows a strike unless one hits whatever detector they use I think laugh smile What is the range on it?

Top
#65694 - 18/07/2005 11:25 Re: Perth and WA day to day weather
Matt Pearce Offline
Weatherzone Addict

Registered: 26/01/2001
Posts: 4402
Loc: Kariong, NSW
It only has detectors in the southeastern states so its "range" is really limited to only QLD, NSW, VIC, TAS and to a lesser extent SA. It is useless for WA and NT.

Top
#65695 - 18/07/2005 11:33 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Ahh that explains it Matthew! why even have a lightning page for WA then? It seems about as useful as having a radar page for the northern Interior of WA. Or is it there so WA and NT people feel that they actually do get the same services as the eastern staters?

Top
#65696 - 18/07/2005 11:49 Re: Perth and WA day to day weather
Gulf Lines Offline
Banned member

Registered: 01/02/2001
Posts: 6369
lol don't go there Tim. Has been alot of debate on that some time ago! I agree with your sentiments though.

Anyway back on topic, when is your next period of wet weather due? I note that it has been fairly dry of late after the massive start to the season.

Top
#65697 - 18/07/2005 12:09 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Yeah I wont PaulM I know it doesn't acheive anything.

Yeah it has been really dry herethis month, well dry by our winter standards, May and June delivered 440mm which was amazing, the wettest two month period for ages. Though it was only really the metro area and surrounds that got the heaviest falls, the rest of the SW area mainly got around average or even a bit less. The catchements faired alright but still not as well as the metro area did, we need some dams in the Perth suburbs I think, maybe dam the swan at Mosman park :p smile I remember seeing the map of rainfall for June and seeing that perth and surrounds where the wettest in Australia, that was on the 28th June, then the heavens opened over SE QLD, NE NSW and stole our glory! smile

Though it does look like a wetter week coming up, We seem to get most of our winter rain nowdays in bursts, when the LWT moves over and sends up Cold front after cold front for about a week or so, sometimes giving us 100mm+ in a week. About time we had another week like that, though I dont think we will get one like that until at least next month.

Top
#65698 - 18/07/2005 17:22 Re: Perth and WA day to day weather
Chaser80 Offline
Member

Registered: 16/07/2005
Posts: 164
Loc: Floreat, Perth, W.A.
Hell yer....bring on the rain!

With the lightning Det Im gonna buy, I think with the software that comes with it, it may not allow me to put it on the web, but if I buy "nextstorm" or "Lightning/2000" I will be able to. If there is enough interest, Ill work towards maybe having it on-line for this storm season.

Boltek quote...on the LD-250
"Three display ranges, 100, 200 and 300 miles (160, 320 and 480 km) allow you to zoom into the region of interest. Zoom out to the maximum range of 300 miles (600 miles across) or zoom in to 100 miles to see only the nearby storms."

Go to http://www.boltek.com for more details.
Tim email me the details of the meeting on the 31st. we can talk bout it then

Top
#65699 - 18/07/2005 17:54 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Alrighty mate, will do...

anyone else that might be interested in coming to the ASWA meeting/bbq on the 31st of this month email me for details, tectrix@iinet.net.au

Top
#65700 - 18/07/2005 18:53 Re: Perth and WA day to day weather
Chaser80 Offline
Member

Registered: 16/07/2005
Posts: 164
Loc: Floreat, Perth, W.A.
Hey if anyone wants to see the footage of the water spout/supercell off the coast on May the 21st, come to the ASWA meeting on the 31st. I was the one that took it....I even made the news! Did anyone see it?

Sorry Blowing my own trumpet:)

Top
#65701 - 19/07/2005 10:41 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
hehe, blow that waterspout trumpet all you like chaser smile , witnessing a waterspout in Perth is a once in a lifetime experience and managing to get it on film is even better, I just wish I saw it! smile

Top
#65702 - 19/07/2005 18:33 Re: Perth and WA day to day weather
Tim S Offline
Member

Registered: 10/06/2003
Posts: 1549
Got to 22.8C today in Perth, not bad for the middle of winter! Wind is really starting to pick up ahead of the front too, already gusting to around 35 knots on the capes, with Gale warnings issued for tommorow for us.

I still dont have much faith in the coming fronts for delivering too much, though GFS is predicting about 20mm from tommorow nights front, which is sposed to arrive around 10pm i think. I think the front on Friday doesnt look like being very impressive either, the BoM are calling it weak now...

Top
Page 2 of 278 < 1 2 3 4 ... 277 278 >


Who's Online
7 registered (TeeCee, logansi, Hurricane force, hickory, Rainbow Spirit, Foehn Correspondent, 1 invisible), 273 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Today's Birthdays
beefy, falay002, Paul79, Ruckle
Forum Stats
29419 Members
32 Forums
23728 Topics
1469043 Posts

Max Online: 2925 @ 02/02/2011 22:23
Satellite Image