Summer 2022 NH / Winter 2022 SH Discussion Thread.

A 10C drop in temperatures from yesterday - from a high of 29C to a high of 19C. Cloudy all day but only a few spots of rain around 4pm.

For June as a whole there’s only been 15mm of rain, with the earliest forecast rain being light showers on Friday next week. The ground is really getting dry now. Should also help us get really high temperatures during any hot spells later in the summer.

Let's see how accurate this will be, I mean in true fact (here below is the forecast for tomorrow):

7000km Long Cloudband Stretches Across The Country
( source: Weatherzone )

Stretching all the way from the equator to Melbourne, a long cloudband is bringing patchy rain, a sign of things to come this winter and spring.
A broad trough connected to a cold front in the south has been building in the Indian Ocean over the last few days. After yesterday's crossing of southwestern parts of WA, the cloud is now stretching all the way from a tropical disturbance near the equator just south of Sri Lanka, all the way to the northwest near Port Hedland, across Uluru, to Victoria, and later on Tasmania.

Cloudbands like this are fairly common during a negative Indian Ocean Dipole (IOD) event, something that is likely to develop over the next few weeks. The IOD is fairly similar to the more commonly known El Niño and La Niña events that occur in the Pacific Ocean, with La Niña being the most similar to a negative IOD for Australia.
During a negative IOD, warmer waters stay near the northwest shelf of Australia. This moisture can fuel vast northwest cloudbands, like the one today, which can cause widespread rain, thunderstorms and flooding, especially west of the Great Dividing Range. The map below shows how negative IOD events typically affect Australia’s winter-spring rainfall.

As the Bureau of Meteorology have mentioned on their climate outlook “All five international climate models surveyed by the Bureau indicate a negative IOD event could develop during early to mid-winter". This means that a negative IOD event is a high chance to develop in the next few weeks, which then typically lasts through until around November or December.

Yesterday will be a day to remember! Got up to 73 F/23 C at 2:00AM but the temperature hovered in the low 60s all day with a brisk northwest wind. Some local PWS stations were in the upper 50s. Incredible for the afternoon on June 18th. Usually such cool temperatures this time of year are associated with rain but it was just windy with clouds and sun. 

Hot temp/High dew combo yesterday in some SW France locales, with 40.2/19.3°C (HI of 44) in Dax:
www.infoclimat.fr/observations-meteo/archives/18/juin/2022/dax-seyresse/07603.html


Temps in the mid-90s with dews in the mid to mid 70s earlier.


Here we underperformed badly due to prolly Saharan dust. Also, the cold front from the Channel progressed further southeast than anticipated. I was in Deauville On the Channel coast yesterday and the front made some damage. One kitesurfer was killed by high winds. 
There, the temp was still 34.1°C with a 18.6°C dew at 4 pm. When we got of the restaurant at 10 it was downright chilly, with 15°C and high winds.

Then returning to Paris later that night we were back in summer: at 1.30 am the car thermometer indicated 31°C.



Unfortunately I'm just north of the boundary, with temps in the mid-30s just south of here. These purple areas will probably get all the good storms tonight.

Not too often you see such widespread dew points in the 30s/40s in the latter half of June (as of 1 PM).

Not just today. Luckily I was at home this weekend, the temperature was 36 °C when I left and 16 °C a few hours later when I arrived in Aachen .

Cotbus reached 39.2 °C today, the hottest temp of this heat wave in Germany.

Another extreme difference between here and Duluth. A drive from here to there would be interesting.