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The weather and safety outlook for Saturday 27 February 2021 (Lockdown Day 338)

There is an acronym index at the bottom of the report for those not understanding some of the weather jargon. ;)

Day 338 of lockdown

Good morning all you awesome Wild2Fly people. The SAH still dominating with that ridge along the southern parts coupled with the trough along the west coast. Still that deep easterly flow all over with high temps in the west and associated high climbs (over 7500ftASL) Winds around CP are very strong and this will migrate northwards not helping those fires in Jonkershoek much. Some clouds around even into the interior but these will clear by mid day with only a small edge along the southern and eastern coastal regions after lunch - EL and PE perhaps a slight chance of rain. Far inland though west of Kimberly high bases with the sweetest climbs – NW winds 10-15kts all the way to base at 15k. Dream and drool! ;) Back home, winds along the southern parts are strong SE in the afternoon but a sweet start though. From 10k the winds go N but then back to the WSW from 30k to finish at 50kts at the Tropopause.

SA isobars at mid day

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SA rain mid day

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Sweet Kimberly cloudbase heights! :)

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West coast

CT – A good wind-shadow start with light east winds around the City but its strong at CP. Later the SE will move in and erode the wind-shadow with very strong winds 20kts plus again. The main mountains pretty useless for flying with the strong SE winds dominating.

RB – Probably a tad too east but it does look like the east facing slope could offer something later in the day. (See spot graph!) Or the Southerly could move in here later I think…

PV – Super strong S winds in the south that will move into the PV valley late afternoon. The best spot is to the north at Kardoesie where you could sit pretty at over 7500ft for most of the day. ;) See graph. Some very strong thermic stuff so be careful!

 

Kardoesie best spot!

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RB spot!

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Surface winds at 10

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Surface winds at 15:00

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Southern areas

Wilderness – Another light SE start but then the winds picking up progressively. Again the apps showing some strong low level flows with a strong gradient – 20kts around 1000ft but much less on the surface for the Map. IT will blown out in the afternoon but its just a mater of when! Fingers crossed it is late! ;)

Plett – The SE dominating here with things just probably too cross to be any fun. But climbs doable to over 3k…

PE and PA – A light wind start but then increasing as the East starts to dominate. Chance of light rain.

EL – Similar but perhaps with a tad more South initially and a chance of light rain…

Inland – Another beautiful light E to SE wind start to the day with increasing strengths into the afternoon from the SE. So fly early for the propeller thingies! ;) (See graph)

For Wilderness, sunrise was at 6:16 and setting at 19:08 – day length 12:52. (How quickly the darkness is eroding the light… Ouch!) A cloudy start with a fresh SE wind from late morning onwards. Perfect for beach and forest walks. Do go and get high on life. ;) Max temperature around 21 degrees C! Enjoy the day! :)

 

Sedge flyability

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Uppies flyability

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East coast surface winds 15:00

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Wild2Fly weather report Acronym sheet


IOH – Indian Ocean High Pressure System
SAH – Southern Atlantic High Pressure system
LSH - Lesotho High Pressure System
B/S - Boyancy Shear ration
CB - Charlie Bravo, Aviation term for Thunderstorms
CT – Cape Town
CP – Cape Point
CATS - Clear Air Turbulence
GR - Garden Route
EL - East London
LR – Lapse Rate
LH – Lions Head
SH – Signal Hill
SLP – Sir Lowries Pass
FB – False Bay
FH - Franschoek
RB - Rondebossie
PV – Porterville
CP – CarPark
BH – Beach Hotel
WC – Western Cape
PE – Port Elizabeth
PA – Port Alfred
WWB - Wrong Way Bob
W – West
OD - Over development
Q's - Cumulous clouds
SW – South West
WSW – West South West etc

If I have missed anything let me know.

;)  

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