There isn't really much to say about the the fronts passing today and tomorrow (Wed 3rd and Thurs 4th), except that they are a bit messy (not well defined on the satellite image). Cloudy, windy, cool and damp conditions have already begun over Cape Town this morning. It will take some time for the weather to clear up on Fri 5th.
The SAWS ship synoptic chart and EUMetsat Antarctic sector Airmass animation show the respective positions of the fronts, as well as the cold upper trough (deep reddish-brown on the airmass image).
metzone.weathersa.co.za/images/articles/ma_sy.gif
oiswww.eumetsat.org/IPPS/html/MSG/RGB/AIRMASS/ANTARCTIC/
The next frontal system due to reach the SW-Cape on Sun 7th also looks a bit messy. The NCEP GFS ensemble shows the upper trough behind the front forming a closed circulation (500 hPa level) consistent with the development of a weak cutoff-low on Mon 8th:
www.cpc.ncep.noaa.gov/products/african_d...nsm_spa_hgt500a.html
This cutoff-low has the potential to intensify on Tues 9th, but is most likely to be positioned offshore. Other model runs show this system having minimal effects on land (perhaps a Black South Easter along the southern Cape coast). See: www.cpc.ncep.noaa.gov/products/african_d...rica/24h_precip.html
Compiled by Gordon Richardson (Stormchasing SA)
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