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John Henderson yesterday after launching from TM near the Cable car station. :)

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The weather and safety outlook for Thursday 23 September 2021 (Lockdown Day 549)

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

Day 549 of lockdown

Good morning all you amazing Wild2Fly people! Gatskop fever should be hitting all of you by now! ;) Sweet flying from TM yesterday for a few lucky pilots! This pic from John Henderson after they flew form Africa face at the cable station! Today the SAH and Cold Front dominating our weather as it moves into the WC. It’s a dryer one with no rain but the winds certainly will make its presence felt. Loads of low cloud along the west coast and this will increase during the day. Winds are strong NW in general and of course in the prefrontal areas it is very strong with 30ts in many spots and high temps. There is the usual deep instability ahead of the front with very high clouds shaping up inland of PE and EL. Base out there around 15k. (40kts winds up there!) lol. The IOH still active in the far east with strong NE coastal winds. The GR the change over area as the SW moves up from the west while the NE dominates to the east of here. Lots of wave action along the front edge – see the sweet 4.5m/s climb over the Teewaterskloof dam. (I’ve always dreamed of getting into that little sucker in my hangie!) ;) Looks like some things are meant to remain dreams… lol. Winds are all NW with height with a West finish at 80kts. Freezing level around 13k.

CT – A NW to W wind day with lotas of low clouds and this will increase during the afternoon. Fly early before it clags over too much I would guess. The main ranges are too strong with the prefrontal winds pushing hard over the tops of the mountains. (See spots)

RB – WWB…

PV – A NW to W day with winds perhaps just manageable for flying. Climbs to 5k at lunchtime from the looks of things. So probably the spot to go to. See Spot.  

Wilderness – A classic prefrontal day with strong upper winds and changing surface winds on the cards. It is a very dynamic day ahead of us with tricky flying conditions to predict. IT is very inverted early on with nothing going past launch height at Serps and Sedge but form lunchtime some movement in the upper flow causing a slight deepening in the convection depth, however, a big however the TOL winds are also very strong which will create shear with a capital S today. Lol. So be very very careful if you go out flying. There is also a strong SW pulse moving in from the ocean that will reach land around 15:00. So keep your eyes open. Lol. Sometimes it good to wait for the sun to go around the planet one more time. ;)

Plett – A similar to Wilderness. See Spot.

PE and PA – PE strong NW winds that will go SW from late morning. PA will be NE at first but late in the day the SW will make inroads here.

EL – Just strong NE all day!

Inland – Strong NW winds every where. The exceptions will be near the coastal regions where the SW from the coast is moving in. Def not a flying day for prop thingies or other. Lol. Those very high gains in the eastern parts of the interior are pretty sweet though (but for the strong winds) ;)

For Wilderness -  Sunrise was at 6:18 and setting at 18:26 – day length 12:09. And summer is on the way! Low tide is at 10:37 and high tide 16:55. Again light SW but after lunch expecting a strong SW gust. Perfect for beach walks and getting closer to God. Go get high on life! ;) Max temperature another around 22 degrees C. Enjoy the day! :)

 

SA isobars at mid day

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WC surface winds 13:00

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Cloud base heights 13:00

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Thermal map 13:00

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Climb rates mid day

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Wave lift over TeewatersKloof Dam! 4.5m/s :)

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West and southern parts

CT – A NW to W wind day with lotas of low clouds and this will increase during the afternoon. Fly early before it clags over too much I would guess. The main ranges are too strong with the prefrontal winds pushing hard over the tops of the mountains. (See spots)

RB – WWB…

PV – A NW to W day with winds perhaps just manageable for flying. Climbs to 5k at lunchtime from the looks of things. So probably the spot to go to. See Spot.  

Wilderness – A classic prefrontal day with strong upper winds and changing surface winds on the cards. It is a very dynamic day ahead of us with tricky flying conditions to predict. IT is very inverted early on with nothing going past launch height at Serps and Sedge but form lunchtime some movement in the upper flow causing a slight deepening in the convection depth, however, a big however the TOL winds are also very strong which will create shear with a capital S today. Lol. So be very very careful if you go out flying. There is also a strong SW pulse moving in from the ocean that will reach land around 15:00. So keep your eyes open. Lol. Sometimes it good to wait for the sun to go around the planet one more time. ;)

Plett – A similar to Wilderness. See Spot.

PE and PA – PE strong NW winds that will go SW from late morning. PA will be NE at first but late in the day the SW will make inroads here.

EL – Just strong NE all day!

Inland – Strong NW winds every where. The exceptions will be near the coastal regions where the SW from the coast is moving in. Def not a flying day for prop thingies or other. Lol. Those very high gains in the eastern parts of the interior are pretty sweet though (but for the strong winds) ;)

For Wilderness -  Sunrise was at 6:18 and setting at 18:26 – day length 12:09. And summer is on the way! Low tide is at 10:37 and high tide 16:55. Again light SW but after lunch expecting a strong SW gust. Perfect for beach walks and getting closer to God. Go get high on life! ;) Max temperature another around 22 degrees C. Enjoy the day! :)

 

PV Spot 14:00

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DTK Spot 14:00

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Sedge Spot 12:00 - note TOL wind!

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Garden Route wind at 13:00

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Uppies Spot winds at 13:00 - Note TOL wind!

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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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