Valencia sailing conditions april 2007
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Valencia sailing conditions: April 2007. The facts. The big question Is Valencia a bad venue, or is April 2007 just an extremely bad month? This is the data we use for wind analysis Most accurate data available MDS weather buoys 2005-2007 Puertos weather station 2000-2004

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Presentation Transcript

The facts
The facts

  • The big question

    Is Valencia a bad venue, or is April 2007 just an extremely bad month?

  • This is the data we use for wind analysis

    • Most accurate data available

    • MDS weather buoys 2005-2007

    • Puertos weather station 2000-2004

    • Puertos station calibrated to buoys

    • Data used from 15:00-17:00

    • Wind limits 7-23 knots



Valencia percentage of sailing days
Valencia: percentage of sailing days


Auckland percentage of sailing days
Auckland: percentage of sailing days

  • Analysis conducted by CSIRO

  • Criteria:

  • 12:00-15:00

  • 7 – 23 knots

  • AXYS Buoy Jan. 2001 – Mar. 2003

  • 35 – 50% sailing days in summer months in Auckland

  • Endeco Buoy Jan. 1997 – Mar. 2000

  • 35 – 55% sailing days in summer months in Auckland


Valencia consecutive non sailing days
Valencia:consecutive non-sailing days


April 2007

Race

Race

April 2007

Almost 11 consecutive days !

LVC Start


Summary
Summary

  • April 2007 was an extremely bad month with almost half the number of sailing days than usual

  • Analysis has been done with the best available data and would stand up to independent scrutiny

  • Suitability of Valencia as a sailing venue should not be judged on one extremely rare meteorological event


What makes wind in valencia
What makes wind in Valencia?

  • Gradient Vs Sea breeze

  • Need favorable gradient wind for sea breeze

    • Southerly gradient gives the strongest sea breeze

    • North-easterly gradient gives weakest sea breeze

  • Thermal effect, especially over the mountains

    • Warm over land, cool over sea


Atmospheric block
Atmospheric ‘block’

  • Occurs mainly over Europe in the winter and spring

  • Stable pattern – hard to break

  • Position can change

    • It makes a significant difference to the weather

  • Very hard to predict when the ‘blocks’ form and when they will disappear!


Surface pressure different from normal

2007

2006

Surface pressure different from normal

L

L

H

L





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