September 25, 2021, 21:28:35

Weather extremes

Started by j, August 11, 2007, 05:28:50

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Ulrich

Yesterday I was on the road with my sister & niece, where we went the weather was ok, only later it rained a bit, but when we drove home it became clear that it had rained a lot, there was a little "creek" next to the road (where there shouldn't be and never was)! In some other places (ditch near the road) were little "lakes".  :1f632:
It continued raining over night, so far I've not heard whether there were floodings or something, must have a look later...
(Edit: today I saw no signs of floodings, thus the "lakes" must have oozed away.)
It doesn't touch me at all...

SueC

Well, we've had five fronts in one week (!!!) and three of those with severe weather warnings, including today's. I'm just sloshing around in gumboots when outdoors; everything is back to bog conditions.

Everywhere, town and country, the soils are saturated and the moment it rains more, things start to flood...



And apparently, the biggest front is due to come through early Monday morning:

https://www.abc.net.au/news/2021-07-09/strongest-cold-front-of-season-set-to-hit-wa-on-monday/100279544

...it's worth having a look at the link just to see the video clip of Perth today...
SueC is time travelling

SueC

QuoteTOP PRIORITY FOR IMMEDIATE BROADCAST

Severe Weather Warning
for DESTRUCTIVE WINDS, HEAVY RAINFALL, ABNORMALLY HIGH TIDES and DAMAGING SURF


For people in Lower West, South West, South Coastal, South East Coastal, Great Southern and parts of Central West and Central Wheat Belt districts.

Issued at 11:07 am Monday, 26 July 2021.

A strong cold front will move across the South West Land Division Monday afternoon and evening which will bring strong winds and heavy rainfall.

 Weather Situation: An intensifying cold front will reach the South West District during Monday afternoon. Ahead of the cold front a developing rain band will bring heavy rain and possible strong squalls to western parts of the South West Land Division from late afternoon Monday. This weather will extend eastwards overnight Monday and continue into Tuesday.

WIDESPREAD DAMAGING WINDS, averaging 60-70 km/h with gusts to 120 km/h are likely to develop southwest of Bunbury to Bremer Bay from early afternoon, extending to be southwest of Jurien Bay to Bremer Bay, including the Perth Metro area from mid to late afternoon. DAMAGING WINDS will extend northward and eastward to the remaining warning area overnight Monday and into Tuesday morning.

Locally DANGEROUS WINDS with gusts in excess of 125 km/h are possible southwest of a line from Geraldton to Bremer Bay and may develop from mid-afternoon and continue through the evening.

HEAVY RAINFALL which may lead to FLASH FLOODING may develop over the northern South West and Lower West districts, particularly near the Darling Scarp, from mid afternoon. Moderate to heavy falls may extend into the west of the Great Southern later Monday afternoon and evening.

A Flood Watch is current for some catchments in the southwest. See http://www.bom.gov.au/wa/warnings/ for more information.

Tides are expected to be HIGHER THAN NORMAL today between Shark Bay and Israelite Bay. HIGHER THAN NORMAL TIDES may cause FLOODING OF LOW LYING COASTAL AREAS with VERY ROUGH SEAS between Perth and Israelite Bay on Tuesday.

DAMAGING SURF CONDITIONS are likely which could cause SIGNIFICANT BEACH EROSION between Jurien Bay and Walpole Monday, extending to areas between Shark Bay and Israelite Bay on Tuesday and continue for the rest of the week.

This front is expected to be windier than a typical front and is likely to produce the kind of weather that is only seen around twice a year in the southwest of WA.

Locations which may be affected include Albany, Bunbury, Esperance, Geraldton, Katanning, Mandurah, Manjimup, Margaret River, Merredin, Moora, Mount Barker, Narrogin, Northam and Perth.

The Department of Fire and Emergency Services advises that people should:
* If outside find safe shelter away from trees, power lines, storm water drains and streams.
* Close your curtains and blinds, and stay inside away from windows.
* Unplug electrical appliances and do not use land line telephones if there is lightning.
* If boating, swimming or surfing leave the water.
* Be alert and watch for hazards on the road such as fallen power lines and loose debris.
* Keep away from flooded drains, rivers, streams and waterways.
* Be careful of fallen trees, damaged buildings and debris.
* Be careful of fallen power lines. They are dangerous and should always be treated as live.
* Assess your home, car and property for damage.
* If damage has occurred take photos and contact your insurance company to organise permanent repairs.
* If your home or property has significant damage, like a badly damaged roof or flooding, call the SES on 132 500.

Re the highlighted red bit, "Usually only seen once or twice a winter" - We've had over half a dozen of these already this year and there's months of this to come.

We've never known a winter like this in the region and neither have friends who are older than us.

And then there's Germany, China and other countries flooding, and two people I correspond with from different parts of North America who have had unbelievable amounts of rainfall - for example, 5 inches in 36 hours in Arizona, which is their entire average summer rainfall in less than two days.
SueC is time travelling

Ulrich

Quote from: SueC on July 26, 2021, 07:50:27And then there's Germany, China and other countries flooding

Last it hit London apparently. Seems like these things happen more often in more places now.  :worried:

https://www.stuttgarter-nachrichten.de/inhalt.unwetter-in-london-heftiger-regen-verursacht-verkehrschaos.e7736893-1276-453e-b4ff-462d649a05f7.html
It doesn't touch me at all...

SueC

Ah but @Ulrich, don't you know, "We've always had floods, we've always had fires, this is just fearmongering!" say the anthropogenic climate change deniers - who don't seem to understand the concept of statistical comparison, and apparently can't read graphs either...

Well, so far our region has escaped lightly, with top wind speeds at around 70km/h and just a narrow band of rain, as most of the front seems to have hit to the north of us, where it has created havoc and widespread rain from the West Coast to far inland. We personally don't need more rain, so fingers crossed. But here's some preliminary wind speeds and rain from around the Southwest:

QuoteCape Leeuwin AWS reported a wind gust of 135 km/h at 2:46am WST Tuesday.

Busselton Jetty AWS reported a wind gust of 124 km/h at 2:51am WST Tuesday.

Cape Naturaliste AWS reported a wind gust of 119 km/h at 2:48am WST Tuesday.

Pearce AWS reported a wind gust of 113 km/h at 6:06pm WST Monday.

Busselton Airport reported a wind gust of 100 km/h at 2:54am WST Tuesday.

Garden Island and Gooseberry AWS reported a wind gust of 100 km/h at 5:30am WST Tuesday.

Rottnest Island AWS reported a wind gust of 98 km/h at 5:04am WST Tuesday.

Jarrahdale recorded 27.6mm of rain in the 1 hour to 5:09pm WST Monday.

Floreat Park recorded 27.4mm of rain in the 1 hour to 5:58pm WST Monday.

Kings Park recorded 25.0mm of rain in the 1 hour to 6:05pm WST Monday.

Swanbourne recorded 24.4mm of rain in the 1 hour to 5:47pm WST Monday.

Dwellingup AWS recorded 42.6mm of rain in the 3 hours to 5:06pm WST Monday.

Waroona AWS recorded 35.2 mm of rain in the 3 hours to 4:03pm WST Monday.

And speaking of weather extremes, the Victorian Alps had rather a lot of snow this week.





The weather guys who posted this thought the person who shovelled the entry access deserved the rest of the week off.  :lol:

PS:  Just heard there's another front like this expected later this week...  :1f631:

QuoteDestructive fronts heading for WA
Ben Domensino, 26 July 2021

Two of the strongest cold fronts this year will cause damaging to destructive winds, flooding rain, abnormally high tides and damaging surf in Western Australia this week.

The first cold front will surge out of the Indian Ocean and blast across southwestern districts of WA on Monday night into Tuesday morning.

Wind and rain will increase ahead of this approaching cold front on Monday.

Widespread damaging winds are expected from mid-afternoon on Monday into Tuesday morning over southwestern and western districts WA, including Perth and possibly reaching up to Geraldton.

Some areas in the state's southwest could see gusts in excess of 125 km/h, particularly with showers and along the exposed South West Capes overnight Monday into Tuesday morning.

Squally showers with locally heavy falls will also develop over the western coastal districts and parts of the Great Southern from Monday afternoon into Tuesday morning.

The heaviest falls are likely to occur along the coast and adjacent inland between about Perth and Bunbury, where falls of 40-60mm are possible along the Darling Range. This rain is expected to cause flooding in several rivers, including the Avon, Swan, Murray and Harvey Rivers Catchments.

In addition to wind and rain, this powerful front will also cause abnormally high tides and damaging surf along most of the state's western and southern coastlines on Monday and Tuesday. This may cause beach erosion and flooding in some low-lying coastal areas.

There will be some respite mid-week, before another strong cold front hit the state on Thursday.

This will be another dangerous system, with more damaging winds, heavy rain, potentially severe thunderstorms and damaging surf all on the cards between Thursday and Saturday morning.

Wind and rain will ease from Saturday, although cold air will linger over the southwest of WA during the weekend. Perth will only reach the mid-teens on Saturday, which is 3-4 degrees below-average for the middle of winter.

from https://www.eldersweather.com.au/news/destructive-fronts-heading-for-wa/534655
SueC is time travelling

SueC

QuoteIt was midnight madness over the Tasman Sea last night as a 2000 km long line of thunderstorms lit up the sky between Australia and New Zealand.

A cold front that swept across southern Australia on Sunday and Monday moved out into the Tasman Sea on Monday night.

This front marked the boundary between a cold air mass moving up from the Southern Ocean and much warmer, moisture-laden air flowing across the Tasman Sea from the north.

As these two contrasting air masses clashed, a long line of thunderstorms erupted under the cover of darkness.

More here: https://www.eldersweather.com.au/news/2000-km-line-of-lightning-from-australia-to-nz/534832
SueC is time travelling