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World ARC Weather - Leg 4



World ARC Weather - Leg 4
Issued 22nd March 2010

SHORT RANGE SYNOPSIS VALID 03/22/1200 UTC to 03/24/1200 UTC Trade winds fluctuating next 2 days. Pressure gradient between S Pacific highs & equatorial low pressure near ITCZ varies along route of WARC because of S Pacific Low. ITCZ between 01N-03N from 110W-120W & between 00N-02N from 120W-140W, only slight 1-2 deg movement expected next 48 hrs. S Pacific highs meandering near 30S/095W (1022mb) & 40S/140W (1035mb). S Pacific low (1008mb) currently near 30S/120W at the base of a trough extending to 20S/135W & 15S/140W. Low moving SE to near 40S/100W in 24-26 hrs. Low weakens pressure gradient between ITCZ & S Pacific highs causing lower wind speeds along route of WARC next 24-36 hrs, especially W of 125W. Winds start increasing when low moves further SE. Trough also causing increased cld & threat of shwrs near Marquesas.  

AREA FX VALID 03/22/1200 UTC to 03/23/1200 UTC

*05S-10S from 110W-120W*
WIND: SE/ESE 13-20 gust 23. Expect slight backing of the flow as you head W.


SEAS: 2-3m from SSW/S trending to SSE/SE.

WEATHER: Sct cld & isolated shwrs.

*06S-11S from 120W-130W*
WIND: E/ESE 10-18 gust 20. Expect slight easing & backing as you head W. 

SEAS: 1.5-2.5m from SE/ESE.

WEATHER: Sct/bkn cld & widely sct shwrs.

*07S-13S from 130W-140W*
WIND: E, ENE at times, 08-15 gust 20, may increase to 10-18 late. Lightest S of 10S & E of 135W.   

SEAS: 1.5-2.5m from E/ENE but may mix with S'ly swell S of 10S.

WEATHER: Sct/bkn cld & widley shwrs. Except, bkn/ovc cld & sct shwrs likley
W of 135W.   

Area FX valid 03/23/1200 UTC to 03/24/1200 UTC

*05S-10S from 110W-120W*
WIND: SE/ESE 13-20 gust 23. Expect slight backing of the flow as you head W.

SEAS: 2-3m from SSE/SE.

WEATHER: Sct cld & isolated shwrs.

*06S-11S from 120W-130W*
WIND: E/ESE 10-18 gust 20 increasing to 13-20 gust 23. Expect slight easing & backing as you head W. 

SEAS: 1.5-2.5m from SE/ESE.

WEATHER: Sct/bkn cld & widely sct shwrs.

*07S-13S from 130W-140W*
WIND: E, ENE at times, 08-15 gust 20 increasing to 10-18. Lightest S of 10S.


SEAS: 1.5-2.5m from E/ENE but likely mixing with S'ly swell S of 10S.

WEATHER: Sct/bkn cld & widley shwrs. Except, bkn/ovc cld & sct shwrs likley W of 135W.   


***NEXT SCHEDULED FORECAST ON 24th***

Forecast prepared by Sailing Weather Service, LLC
Learn more at www.sailwx.com or www.windpower.sailwx.com