Southern Hemisphere Autumn 2019

I like to just look for the lowest pressure I could find on Ventusky. Today there's something fairly unusual:

An Antarctic cold-core low got down to 943 hPa/943 mb. The Braer Storm of January 1993 was the strongest extratropical cyclone I have found at 914 mb, although it is likely that there could have been stronger storms in the Antarctic not recorded before.



Also, it has gotten down to 938 mb at its peak (March 26 at 1am here, 4am in NYC, 8am in London, etc.):

wet down in New Zealand

^To buggery with that autistic mestizo marlaver pov arse ghost-snitchin decidious-foaming eucalyptus-bashing codswallop           

the V O I D

What makes it look so cold? It is shaded with yellow.

And yes: ever since the January heatwave had ceased to exist, it has straddled around or below average, with March snowfall and lower single digit maximums (barely above 5° C) upon the 30th-31st of March. 

I'd wager the coming months to yield below-average temperatures; above-average precipitation. Very likely.

Updated at 11:20 5/4/19 WA time.





BOM and GFS both show the tropical low developing into a category 3 cyclone but at the moment show it sitting off the Pilbara coast not affecting many towns except for communities in the northern kimberley tomorrow. Let's hope it gives a bit of rain but isn't strong if it crosses the coastline.

My summary is a little bit shorter. Driest January to April period in 164 years of records. The previous record was 49.1mm from Jan-Apr in 1923, whereas this year we've recorded 49.0mm, so it's a close one.

Forecast for Western Australia, April 30th:

Reference:


Starting in the far north! A trough sitting roughly above Broome slowly weakens throughout the week into saturday with scattered showers and storms in the eastern and northern Kimberley over thursday, friday and clearing over saturday. The cold front hitting the SW-corner of the state will actually affect these far northern regions with skies clearing over the weekend (high pressure) followed by the first "cool" days with Halls Creek forecast 32/14 next tuesday and 36/19 in Fitzroy Crossing. These changes are pronounced near the coast or any further north than those two towns. For the week ahead skies will be partly cloudy/sunny near the coast and south clearing to sunny by the weekend all over the Kimberley. Temperatures will sit in the mid-high 30s at daytime and low-mid 20s dropping to high teens-twenty early next week. Winds generally E/SE 10-20km/h. Above average temperature for early May!

In the Pilbara a trough will develop on thursday but dissipate quickly in favour of high pressure before the cold front comes through bringing weak troughs ahead of it. In general it will be a hot and sunny week for the Pilbara with maximums in the mid 30s almost every except at higher altitudes and to the far south where they'll sit in the low 30s. Minimums will drop into the teens for most towns by friday except for the Karratha region which will continue its run of very balmy 22-23C May nights Winds will be E/SE 10-25km/h throughout the week getting stronger SE 20-30km/h around tuesday with the arrival of cool, dry air from the front.

The Gascoyne and Central West will end the week with gradually warming days but nights are staying fairly cool, a sign of the approaching winter! High pressure will dominate until Sunday with the arrival of the front. Maximums will be in the high 20s/low 30s over the northern gascoyne (even 33-36C in the far north but no one lives there) with a steady decline to very low 20s around Moora and the northern wheatbelt districts east of Geraldton. By friday temperatures will be in the low 30s all over but the front will bring much cooler maximums in the low 20s in the Central West and low-mid 20s in the Gascoyne.
Winds will prevail E/NE 10-20km/h becoming SE 20-30km/h early next week.

The Goldfields and Eucla are still feeling the effects of the last cold front with Wednesday and Thursday being cold with maximums in the mid to high teens and minimums in the single digits. Synoptically pressure will rise and conditions will be very calm and dry providing the increase of temperatures on friday, saturday and a peak on sunday (low 30s/low teens forecast) before the front brings with it blustery westerlies, showers and cloud. Light winds dominate until friday with the arrival of warm northerlies which will intesify over saturday and sunday morning before the cool change on monday!

For the South West Land Division: The next two days will be very wintry with areas close to the coast (South-West and South-Coastal districts) being much cloudier, windier and colder than Perth, the central wheatbelt (which will be very sunny and calm) and southern wheatbelt. A previously mentioned trend will also appear in the SW Land Division with a rapid warmup on friday with maximums in the high 20s in the north and low-mid 20s in the centre and south. The front will hit on Saturday bringing rain to the far SW coast and showers for the rest of the region but temperatures won't drop too much until Monday as cold air pools behind the front.

Kimberley:
Pilbara:
Gascoyne:
Goldfields:
SW Land Division:
(South Coastal):
(South West):
(Wheatbelt):

Perth:

Very warm outlook!