SOUTHERN HEMISPHERE TROPICAL-EXTRATROPICAL CLOUD BAND MONITOR

October 2024:

Good climatological start to the tropical-extratropical cloud band season in October, however, cloud band activity has had eastward displacement, with likely reductions in expected early season rain in central southern Africa and larger receipts in eastern regions.

Latest monthly gridpoint accumulation

Accumulation of cloud band days at grid-points for last month, with red dots indicating centroid of observed cloud bands. Blue contours show climatological value of cloudband days count.


Seasonal progression of cloudband days

Monthly cloudband days for last year (grey bars) including latest month (red bar). Climatological cloudband days per month shown in blue line, which blue shading denoting interquartile range of climatology. interquartile range

Rainfall contributions of cloudbands

Contribution (%) of cloud band events to monthly total rainfall (contour).
Monthly area-averaged cloudband rainfall totals for sector compared to climatological cloudband rainfall monthly totals.