Weather for the weekend of 29 - 30 October 2011

Updated 28/10/2011

A high off SE Australia, which has ridging up the east coast, and another off SW Australia are slowly moving east whilst most of the continent lies under generally slack pressure with associated troughs. One of these moved through SE Queensland on Wednesday night but several others lie approximately north/south distributed across the continent. At this stage, it appears unlikely that the first of these troughs will move into SE Queensland over the weekend, but ahead of the next trough there will be sufficient instability for thunderstorms to form on Sunday.

Dalby has received nearly 30mm of rain since Wednesday. The area west of Dalby received more - with Miles totaling 50mm. Jondaryan has only received 9mm.

Saturday 29 October 2011
Dalby             29C
Stability          B
Convection     Dry convection to 8,000ft with cloud base 6,000ft
Wind              Northerly @ less than 5kts

There will be high cloud about. Towering Cu may form and, if so, some may produce the occasional light thundery shower (CAPE 500j/kg and SLI -1C).


Sunday 29 October 2011
Dalby             30C
Stability         A
Convection     Dry convection to 8,000ft with cloud base 6,000ft
Wind              Northerly @ less than 5kts

There will be fairly thick high cloud about that could adversely affect convection. Towering Cu will form and some of these will mature into fully developed thunderstorms (CAPE is 900 J/kg and SLI -3).