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Post by rozenn on Feb 9, 2023 8:06:06 GMT -5
Rather cold night around my latitude with the calm winds.
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Post by nei on Feb 9, 2023 15:50:43 GMT -5
Eek
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Post by Speagles84 on Feb 9, 2023 15:54:58 GMT -5
Yeah that place is fucked, east Palestine is roughly 30 miles NW from here
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Post by rozenn on Feb 9, 2023 17:44:28 GMT -5
Strong inversion this morning, with 1.3°C/34°F at the top of the Eiffel tower vs -6.8°C/20°F a few kilometers away at the Longchamp racecourse.
Coldest reading in the region was -9.6°C/15°F in Fontainebleau.
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Post by Doña Jimena on Feb 10, 2023 0:53:10 GMT -5
Winter thunderstorm in Riga. 46 lightning strikes this Friday morning:
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Post by greysrigging on Feb 10, 2023 1:19:23 GMT -5
How Tropical Cyclones Can Create Heatwaves In Australia ( source: Weatherzone ) Tropical cyclones and heatwaves are both Australian summer staples, but did you know that a tropical cyclone can lead to a heatwave? A heatwave in Australia, but particularly for the southeast, is often triggered by a special kind of high pressure system called a ‘blocking’ high. Blocking highs are high pressure systems that have been locked in place by the jetstream, meaning they stay virtually stationary for several days up to a fortnight. When there is a blocking high in the Tasman Sea, northerly winds (because in the southern hemisphere, winds blow anticlockwise around a high) are directed towards South Australia, southern NSW, Victoria and Tasmania. If this happens over a lengthy period, hot desert air builds up, creating a heatwave. When a tropical cyclone builds strength of the northwest shelf of Australia, it causes more hot tropical air to rise high in the atmosphere. As it does, most of the moisture is lost through rain but the heat in it is preserved*. Because a tropical cyclone needs to disperse this rising air (what goes in must come out), the outflow of the tropical cyclone strengthens, sending hot air away from the system. * Heat is not directly conserved because the pressure difference between the surface and aloft causes it to cool down. What is actually conserved is the air’s potential temperature. That means if we take the same parcel of air back to the altitude/pressure it came from, it would be the same temperature as before. When this transported air meets the jetstream further south, it causes it to rotate anticlockwise and build an upper high pressure ridge. Any high pressure system beneath the new upper ridge now becomes a blocking high and locks in place. That allows the hot desert air to flow to the southeast. The second way tropical cyclones cause heatwaves is that the air that accumulates in the upper ridge will slowly start to descend back down to the ground in a process called subsidence. While this can take days or even weeks, the blocking high can give the air enough time to make this journey towards the ground. As the air descends, it warms back up to its original temperature, providing extra heat and energy to the heatwave. Both above processes were crucial in creating one of the worst heatwaves in Australian history: the January/February 2009 heatwave that occurred in the days leading up to the infamous Black Saturday Bushfires (7th February 2009). During this heatwave, Melbourne reached 43°C for three consecutive days, and the all-time state temperature records were set in Victoria (48.8°C in Hopetoun) and Tasmania (42.2°C in Scamander). This heatwave was heavily influenced by Tropical Cyclone Dominic, a category 2 system that brought severe flash-flooding around Onslow and the Gascoyne River. The outflow from this cyclone, triggered a large blocking high to form in the Tasman Sea. Tropical cyclones can help trigger these heatwaves in two main ways. The first is shown in the diagram below. Tropical cyclones links to heatwaves in Australia perfectly embodies the line “A land of droughts and flooding rains” from Dorothea Mackellar’s famous poem “My Country”. So, when you see a tropical cyclone brewing off the northwest shelf and heat building in the south, remember that they are often linked.
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Post by Babu on Feb 10, 2023 2:12:04 GMT -5
It didn't quite get to 15'C. The forecast was pretty accurate for 3 days though. An mean positive error of +8.3°F (4.6°C) for highs and +2.3°F (1.3°C) for lows...and a forecast 59/14°F day?! Astoundingly poor performance. What was SMHI's forecast for that period? WeatherOnline is toilet paper, mate. It's horribly inaccurate, pretty fucking sad that some in here still swallow WO's forecast hook-line-sinker because "herd mentality". SMHI forecast highs in the 1-4'C range
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Post by Benfxmth on Feb 10, 2023 6:37:24 GMT -5
A nice soaker incoming (with mild temps as opposed to lifeless cold steady rainy garbage)
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Post by Benfxmth on Feb 10, 2023 13:07:14 GMT -5
Fanbloodytastic today, current temps (just after 1 PM)...
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Post by shalop on Feb 10, 2023 16:33:38 GMT -5
Drove up 8 hours to the Adirondacks this past weekend and measured a -35c. Today I'm back in MD and it got up to +17c. So I got an outdoor range of about 52c or 93f over 5 days. Not very notable given that it's not in a fixed location but might be my largest in such a short period, and interestingly over a distance that's drivable in half a day. Up to a 100f range this week after we reached 68 yesterday lol.
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Post by Steelernation on Feb 10, 2023 18:24:31 GMT -5
February has been fucking boring so far. Last weekend was nice in the 50s but otherwise it’s been incessant 40s and sunny. And that’s after January was incessant 30s.
Except for the big cold snaps around Christmas and the end of January, this has been an extremely boring winter. Very stable and little snow—the heaviest fall was just 4”.
Every day is just total non weather, chilly, dry and sunny with long leftover snow patches on the ground. At least constant 40s are better than constant 30s but it’s still shit, especially with the sun.
At this point since winter isn’t doing its thing I want spring to come. April weather sounds great with warmer temps, precipitation, heavy snows, humid air and flowers/buds.
This is what I imagine a grand junction winter to be like—stable 30s in January, stable 40s in February and rare light snow
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Post by greysrigging on Feb 10, 2023 23:50:38 GMT -5
Saturday 3.40pm AEDST
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Post by Ethereal on Feb 11, 2023 1:17:18 GMT -5
I love how the heat "climaxes" in the Sydney area
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Post by chesternz on Feb 11, 2023 4:42:40 GMT -5
It's been a hot and humid start to February: --- Christchurch had a pretty decent run of warm days too:
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Post by Marcelo on Feb 11, 2023 17:02:04 GMT -5
Behold the wrath of god
Lightning strikes Rio de Janeiro's Christ the Redeemer.
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Post by jetshnl on Feb 11, 2023 22:27:38 GMT -5
Leaf-out is initiating early this year:
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Post by Doña Jimena on Feb 12, 2023 15:07:03 GMT -5
Still above freezing and without snow, high 2.6C in Riga
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Post by Ariete on Feb 12, 2023 15:14:49 GMT -5
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Post by Ariete on Feb 13, 2023 5:42:08 GMT -5
Very warm today. at least 8.2C recorded in Turku. All-time record is 10.2C.
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Post by greysrigging on Feb 13, 2023 6:59:12 GMT -5
Extremes and records today in AU... obviously the AWS is playing up at that QLQ site....
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