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Weather SituationSatellite, RADAR, Model Products

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Weymouth Weather Brief: Thu 6 Sept

Penny Tranter

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Headlines for today

• Large area of high pressure centred close to WAP

• Light SE’ly (130°) gradient wind veering/turning right through the day becoming SSE’ly (160°) by midday and S (175°) by mid afternoon

• Light mainly SSE surface wind (150°) 5kt or less setting in by mid morning

• Light and fitful sea breeze WSW (235-250°) 6kt or less trying to build in from late morning and move east across Portland Harbour during afternoon

• 10% chance light sea breeze blowing for at least 2 hours between 5-8kt

• Fine – dry, warm with sunny spells

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Synoptic Situation

Analysis Thursday 06/0100 Forecast Thursday 06/1300

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Satellite picture 0715 today

WAP

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Model products Winds forecast loop (knots)

0900 Thursday

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0930 Thursday

Model products Winds forecast loop (knots)

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Model products Winds forecast loop (knots)

1000 Thursday

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Model products Winds forecast loop (knots)

1030 Thursday

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Model products Winds forecast loop (knots)

1100 Thursday

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Model products Winds forecast loop (knots)

1130 Thursday

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Model products Winds forecast loop (knots)

1200 Thursday

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Model products Winds forecast loop (knots)

1230 Thursday

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Model products Winds forecast loop (knots)

1300 Thursday

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Model products Winds forecast loop (knots)

1330 Thursday

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Model products Winds forecast loop (knots)

1400 Thursday

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Model products Winds forecast loop (knots)

1430 Thursday

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Model products Winds forecast loop (knots)

1500 Thursday

 

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Model products Winds forecast loop (knots)

1530 Thursday

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Model products Winds forecast loop (knots)

1600 Thursday

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Model products Winds forecast loop (knots)

1630 Thursday

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Model products Winds forecast loop (knots)

1700 Thursday

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Model products Winds forecast loop (knots)

1730 Thursday

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Model products Winds forecast loop (knots)

1800 Thursday

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Winds - Uncertainty in wind prediction From convective scale ensembles

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Portland Harbour - Wind Forecast

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Time (local)

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Wind Direction & Delta Wind Speed Wind Gusts

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Warnings Board

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Summary and uncertainties

• Light mainly SSE surface wind (150°) 5kt or less setting in by mid morning

• Light and fitful sea breeze WSW (235-250°) 6kt or less trying to build in from late morning and move east across Portland Harbour during afternoon

• 10% chance light sea breeze blowing for at least 2 hours between 5-8kt

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Questions & answers

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Forecast products

• http://www.metoffice.gov.uk/loutdoor/olympics/event-manager/(General Weather Forecast, Race Areas Forecasts, Hourly Updates)

• This powerpoint brief is only available via the ISAF website.www.sailing.org/olympics/london2012