Spring Thread 2020 (Southern Hemisphere) (hot, warmest, 2014, nights)
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I had a couple of raindrops yesterday. Only precipitation for the month so far here. Putrid. The weather is dead boring but at least with very nice temp ranges (15/26 most days).
So the west of the country have been more interesting lately. More rain there and even some impressive late season snowfalls above 2500m. Some photos of the mountains in Tucuman province this morning:
There might well be a record breaking ( for November ) heatwave in southern WA and South Australia towards the end of the month. Some models are predicting 850mb temps of 33c ! Translated that is a possibility of temps in the high 40's ( +115f ) at lower altitude sites along the Nullarbor and around Lake Eyre.
Today in Sydney... ( From 'Weatherzone' )
"16-degree temperature difference in Sydney suburbs on Friday: Why?
At 2 pm on Friday, most parts of western Sydney were baking in temperatures of 36 or 37 degrees.
By contrast, it was 25 degrees in coastal suburbs like Bondi, and as cool as 21 degrees at the Bureau of Meteorology's "Sydney Harbour" weather station, located off Georges Head near Mosman.
Why the 16-degree disparity? The sea breeze, right. OK so you knew that.
But how exactly does the sea-breeze effect work to cool down Sydney's eastern fringe, and why is it so common at this time of year?
"Sea breezes occur when the sun heats the ground faster than the nearby ocean. As the air over land warms up, it starts to rise. This causes cooler air from the ocean to rush in and take its place," Weatherzone meteorologist Ben Domensino explains.
"The boundary between this cool sea breeze and the much warmer inland air is called a sea breeze front. In late spring, when the western Pacific Ocean is still quite cool, temperatures can range by around 20 degrees on either side of this boundary. Penrith might be close to 40 degrees while Sydney's eastern suburbs are near 20."
You can feel the effect of the sea breeze front as you travel west in Sydney.
On a day like this when it's 25 degrees at Bondi, it'll typically be around 30 as soon as you're west of the Harbour Bridge. It then quickly rises to 35 and beyond from about Parramatta onwards as you travel west towards the Blue Mountains.
Spare a thought for forecasters on days like today. Even the best of them sometimes find things tricky when a sea breeze has kicked in.
That's because temperatures can fluctuate wildly when the sea breeze is negated by strong offshore winds (wind coming from the land).
Just this week we saw an example of this. As we wrote on Monday, temperatures rose to 41 in Penrith in Sydney's west, but remained only moderately hot for most of the day at the city's Observatory Hill weather station due to the sea breeze, hovering around 29 or 30.
But later in the afternoon, the temperature jumped by seven degrees in half an hour as the sea breeze weakened, peaking at 36.5. So a very smart forecaster correctly anticipated the late gusty northwesterlies when they predicted a maximum of 36.
As for the coming weekend in Sydney, Saturday should see temps in the mid-to-high 20s across the city, while Sunday could be similar to today, with peaks in the mid-to-high 30s inland, but slightly milder temperatures along the coast.
There is also a chance of showers and a storm on Sunday.
All days were sunny, warm-hot and quite breezy. Mainly spent time swimming, beach hopping and chilling with a mate. Went north to towns like Lancelin, Cervantes, Jurien Bay, Green Head, Leeman and Dongara.
Didn't take many photos
November 23rd:
Moore River Inlet
Spoiler
Lancelin Beach
Sandy Cape (campground is right behind where I took the photo, one of the best campsites around)
From 'Weatherzone', Australia.
"Spring ending with a dangerous heatwave.
A large pool of extremely hot air is about to sweep across Australia, challenging records and lifting fire danger ratings in a number of states and territories.
Two broad and slow-moving low pressure troughs will drag a mass of hot air over southern and eastern Australia during the coming week. This prolonged spell of abnormally hot weather will cause severe to extreme heatwave conditions as temperatures soar more than 15ºC above average in some areas.
The hottest air will target the outback, where temperatures should hit 45-46ºC in parts of SA, NSW and Queensland on multiple days, possibly higher in some places.
Image: Saturday will be one of the hottest days of this heatwave, with temperatures likely to reach 46ºC in some parts of the country.
In SA, Oodnadatta is forecast to reach a scorching 47ºC on Saturday. This is less than half a degree off its spring record of 47.3ºC from 2006.
Further south, Renmark is one of several SA locations that are forecast to reach 46ºC on Saturday. This would be a new spring record for Renmark, beating 45.3ºC from 2012.
Over the border in NSW, Brewarrina has an unfortunate forecast of three consecutive 45ºC days between Sunday and Tuesday, bookended by 42ºC days on Saturday and Wednesday. In records dating back to 1911, Brewarrina has never registered three 45ºC days in a row at any time of year.
In Queensland, the heat will initially target the southwest before creeping into the southeast early next week.
Birdsville is tipped to reach 45ºC to 46ºC for five consecutive days starting on Friday. This would be Birdsville’s earliest five-day spell at or above 45ºC on record, with data going back to 1954.
Victoria will escape the most intense heat, although temperatures could still rise to the mid-forties in the northwest by the weekend. Mildura, Swan Hill and Ouyen are all forecast to reach 44ºC on Saturday.
The impending heat will help cause Very High to Extreme fire danger ratings in parts of southern and eastern Australia during the coming week.
Be sure to avoid the heat where possible and keep an eye on the latest bush and grass fire information in your state or territory."
Rivadavia in Salta province recorded 45.5ºC yesterday here in the country. I wonder what is our overall spring record, but it had to be close to that value I guess.
The beginning of the week was the hottest of the month here. And very muggy, wich felt unpleasant after a dry month overall. Then we had a very intense t-storm and temps cooled off today. One of the many picturesque photos from that flashy night:
National heatwave update: Severe to extreme heatwave conditions this weekend and beyond.
The first significant heatwave of the season is here, and it is ending what's shaping up to be the nation's hottest November on record with a sizzle.
Severe to extreme heatwave conditions are expected across much of the south-east and eastern parts of Australia over the coming days as the heat makes its way around the country.
Jonathan How, senior forecaster at the Bureau of Meteorology, said heatwaves are normal for this time of year.
"But the temperatures and duration of what we're going to see is exceptional," he said.
Here is a wrap of how the heat is expected to affect the states and territories.
South Australia
After a scorching day yesterday, South Australian temperatures are forecast to remain high on Saturday with 47 degrees Celsius at Oodnadatta and Maree and 46C in Coober Pedy, Renmark and Port Augusta.
Adelaide is forecast to reach 38C today.
Victoria
Meanwhile across the border, things are hot in northern Victoria, but according to Mr How, Melbourne and southern Victoria will be protected by a southerly breeze.
"Even though it's going to be baking hot, up to 45 degrees along the Murray, for southern Victoria it's going to be fairly cool," he said.
Melbourne is only forecast to reach 28C Saturday and temperatures are expected to be much more pleasant south of the ranges.
New South Wales and the ACT
Southern Victoria might be missing out but there is no such luck in New South Wales.
The heat is stretching all the way to the coast with a forecast of 45C in Hay and Deniliquin on Saturday and 40C days forecast for Western Sydney.
Sunday is expected to be the peak heat day for eastern New South Wales, and even Sydney City is forecast to get up to 39C.
"Severe fire dangers for the Sydney Metro, and severe fire dangers right along the New South Wales coast with very strong winds ahead of a change on Sunday," said Mr How.
The change is expected to come in the form of a gusty southerly buster bringing potentially damaging winds, thunderstorms and a rapid drop in temperatures.
"We're talking 10 to 20 degrees in the space of an hour. It could also bring some thunderstorms in the form of dry lightning.
"So the risk of new ignition on Sunday is there."
Stay alert and keep an eye out for emergency warnings near you.
Queensland
Up in northern New South Wales and south-east Queensland there is no cool change in sight until Thursday. Yes, Thursday.
"It's looking like a five or six-day heatwave for millions of people," according to Mr How.
Possiblly 3 or 4 days exceeding 40c in the western suburbs of Brisbane.
Birdsville and parts of western Queensland could see 5 to 6 days with temps exceeding 45c.
On Thursday, onshore flow is expected to cool things down around the coast, but it will push the heat back into central and inland parts.
The heat is expected to hang around through western Queensland all the way through until next weekend.
Whether or not the heat then circles back around the following week will depend on whether the rain finally starts falling up north.
Northern Territory and the tropics
The southern NT districts also approaching record breaking November heat, with a forecast top of 43c in Alice Springs, 44c at The Rock and 45c at Curtain Springs. The Top End regions are suffering high DP's, temps in the low to mid 30c's and gusty storms with damaging winds.
For the heat to stop circling the country, we really need the tropical rains to kick in.
"It looks like the second week of December could be another heatwave," according to Mr How.
"It's a race between that and the increase in the monsoon activity to see which one wins out."
Despite there being a strong La Niña in the Pacific, the rains have held off for the past few weeks thanks to short-term climate drivers getting in the way.
But with the Madden Julian Oscillation (MJO) expected to move over early to mid-December, that deluge could be starting soon.
Canberra is expected to miss the worst of the peak heat this time round with maximums of 33C and 28C on Saturday and Sunday.
Western Australia
The usual suspects for WA heat, the Pilbara and Kimberley districts are forecast to be close to or just above average, with 42c at Marble Bar and 43c at Fitzroy Crossing and Halls Creek.
While the east is sweating it out, it is looking like a relatively mild weekend in the south-west.
A high-pressure ridge is expected to form over southern Western Australia today before a surface trough forms on Sunday ahead of the next cold front, expected to graze the southwest on Monday.
Perth is forecast to have two lovely days of 25C with no chance of rain, partly cloudy on Sunday.
Tasmania is spared from the mainland heat, with both Hobart and Launceston in the low 20's.
Hobart currently running 3.5c above the long term November mean max temps, so quite a warm month in the Apple Isle.
( Primary source Weatherzone )
Another brutally hot day in Darwin....topped out at 35.3c, the 15th day this month above 35c, and combined with DP's around 25c-26c it was a trying type day.
As usual a cooling storm over the City of Darwin about 3.00pm
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