Everest Forecast 9 april

General weather conditions on the mountain

The high winds at the upper levels are the main concern of every Everest climber. These high wind are caused by the Jet stream that can be found generally around 8-9000meter. The jet stream is related to the polar front that marks the difference between the polar airmass to the North and the subtropical airmass to the South. The altitude of the jet is marked by the tropopause which is the transision zone between the lowest part of the atmosphere, the troposphere, and the adjacent layer the stratosphere.

The best weather window to climb Everest is end of April beginning of June because than the Monsoon pushes the cold air (and consequently the jet stream) further to the North. This means that the wind is significantly less during this part of the year than any other time of the year. Also just around fall there is a little weather window, but usually less confident. 

Climbers must take in account that this ’spring window’ is prone to important changes due to global climate change. 

This forecast is made for Albert Bosch, who climbes the seventh of his seven summits. You will find a wind forecast for every camp level, indicated below. Also an indication of the average air temperature and general weather conditions is given.

Levels
Base camp: 5,360mr  17,858ft
Camp 1   : 6,100mr  20,000ft
Camp 2   : 6,600mr  21,500ft
Camp 3   : 7,200mr  23,600ft
Camp 4   : 7,800mr  26,000ft
Summit   : 8,848mr  29,029ft 

Wind forecast
day 1: 10 april
BC: SW 15kt becoming NW 10kt
C1: WSW 20-25kt becoming NW 10-15kt
C2: WSW 20-25kt becoming NW 15-20kt
C3: WSW 20-25kt becoming NW 15-20kt
C4: W 30kt becoming NW 25kt
S!: W 40-50kt becoming NW 25-30kt

day 2: 11 april
BC: SW 10-15kt
C1: WSW 15kt
C2: WSW 15-20kt
C3: W 20kt
C4: W 20kt
S!: W 25-30kt

day 3: 12 april
BC: SW 10kt
C1: W 10-15kt
C2: W 10-15kt
C3: W 10-15kt
C4: W 15-20kt
S!: W 25-30kt

Temperatures over the next three days
BC: -5°C
C1: -9°C
C2: -12°C
C3: -15°C
C4: -20°C
S!: -28°C

General weather conditions
day 1: 10 april: clouds around summit level, clearing. Later some patchy cloud.
day 2: 11 april: sunny, formation of cumulus around 6000mr-level
day 3: 12 april: high clouds well above summit level, clear below.

This entry was posted on Friday, April 9th, 2010 at 11:35 am and is filed under Albert Bosch-Epopeya Everest Sin Limits. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.