SYNOPSIS: High pressure (1033mb) near 36N/67W extending SE into tropical eastern & central Atlantic. High moving SE to 30N/55W in 24 hrs then absorbed by 1022mb high centered near 30N/65W in 48 hrs. Pressure gradient between highs and ITCZ supports fresh to strong trade winds W of 47W next 36-48 hrs then slight easing. Upper level ridge over Caribbean & central Atlantic from 17N-32N between 45W-90W, upper level trough to E. Cold front near 25N between 45W-70W causing widely sct shwrs/tsms & sct/bkn clouds. Front moving S to 20N in 24 hrs then wkng near 17N in 48 hrs. Elswhr, ridge & highs cause mostly fair WX next 48 hrs.

SYNOPSIS: High pressure (1023mb) stationary near 26N/40W & dissipating in 24 hrs. Strong 1036mb E U.S. high near 37N/78W moving ESE to 33N/55W & wkng slightly in 48 hrs. Pressure gradient between highs and ITCZ supports fresh to strong trade winds next 48 hrs S of 17N and W of 47W. Caribbean upper level ridge extending into central Atlantic from 15N-30N between 40W-90W. Ridge & highs continue fair WX for Caribbean & tropical central Atlantic. Cold front between 25N-30N from 50W-80W moving S to near 17N-20N with widely sct shwrs in 48 hrs.

SYNOPSIS: High pressure (1024mb) near 28N/44W moving WSW to 27N/50W in 24 hrs then stationary & wkng to 1020mb 24-48hrs. Fresh to occasionally strong trade winds S of 20N & W of 47W next 48 hrs from pressure gradient between high & ITCZ. Trade winds easing to moderate strength elswhr. High supported by upper level ridge extending from Caribbean to Central Atlantic between 12N-35N from 30W-90W. Ridge & high provide fair WX from Caribbean to tropical Central Atlantic next 48hrs. No organized upper or lower level disturbances so only expect trade wind type clds & isolated shwrs/tsms in FX zones.

SYNOPSIS: High pressure (1023mb) near 30N/50W moving E to 30N/40W in 24hrs then stationary & wkng through 48hrs. Pressure gradient between high and ITCZ causing mainly fresh trade winds S of 20N and W of 40W next 48hrs. High supported by upper level ridge extending from the Caribbean to Central Atlantic with axis from 40N/56W to 15N/70W. Ridge & surface high provide stable fair WX from Caribbean to Central Atlantic S of 35N next 48 hrs. No organized upper or lower level disturbances so only expect trade wind type clds & isolated shwrs/tsms in FX zones.

SYNOPSIS: A stable weather pattern in the tropical eastern & central Atlantic. Weak high pressure (1020mb) stationary near 26N/40W absorbed by stronger 1024mb high moving SE to 30N/50W next 24 hrs. High maintains strength & moves E to 30N/40W in 48 hrs. Moderate trade winds become fresh in 18-24 hrs S of 20N and W of 40W. Trade winds remain light-moderate elswhr. High supported by low amplitude upper level ridge from 12N-35N between 40W-90W. Ridge expanding E to near 30W in 48hrs. No defined upper or lower level disturbances in active ARC FX zones so only expect isolated shws/tsms, mainly S of 15N.

SYNOPSIS: The weather pattern remains stable in the tropical eastern & central Atlantic. Weak high pressure (1021mb) stationary near 26N/45W next 24 hrs. High absorbed by stronger 1025mb high centered near 32N/53W in 36-48 hrs. Slight easing of trade winds next 24 hrs then moderate to fresh trades S of 20N & W of 40W expected in 24-36 hrs. Weak pressure gradient & light trade winds elswhr. High supported by low amplitude upper level ridge from 12N-35N between 35W-90W next 48 hrs. Upper level wind shear zone from 10N-15N between 35W-60W with very slight increase of clds & isolated shwrs/tsms.

SYNOPSIS: Central Atlantic high pressure (1023mb) centered near 30N/42W moving SW to 26N/45W in 24 hrs then stationary and wkng to 1020mb in 48hrs. High maintains moderate to fresh trade winds S of 20N and W of 33W next 48 hrs. Weak pressure gradient & light trade winds elswhr. High supported by upper level ridge with axis from 35N/40W to 15N/80W. Ridge flattening with axis from 30N/30W to 20N/80W in 48hrs. Upper level trough with increased clds E of ridge from 40N/20W to 20N/35W moving E next 48 hrs. Very weak upper level low (cyclonic) circulation between 10N-17N from 40W-50W drifting E next 48 hrs with area of slightly increased clds and sct shwrs/tsms.

SYNOPSIS: Central Atlantic high pressure (1024mb) centered near 30N/50W moving to 30N/42W in 24hrs & 24N/45W in 48hrs. Dissipating high pressure (1023mb) near 30N/27W. High maintains moderate to fresh trade winds S of 20N. Light trade winds elswhr as high wkng pressure gradient. Central Atlantic high supported by upper level ridge with axis currently from 40N/52W to 10N/80W. Ridge increasing wavelength & building E next 48hrs. Increased cld & widely sct shws in vicinity of upper level low centered near 17N/47W. Upper low wkng & drifting SW in 24-36 hrs. Upper level jet and surface trough extending from ITCZ causing bkn cld & sct shws/tsms from ITCZ to 15N between 25W-45W next 36-48 hrs.

SYNOPSIS: High pressure centers near 33N/21W (1027mb) & 32N/40W (1026mb). Highs merge into one center near 30N/50W in 24hrs moving E to 30N/40W in 48hrs. High maintains moderate to occasionally fresh trade winds S of 20N. Trade winds ease elswhr as high weakens pressure gradient. High supported by upper level ridge with axis currently from 40N/53W to 10N/70W. Ridge building E, over central Atlantic, next 24-48 hrs. Increased cld & widely sct shws in vicinity of upper level low centered at base of remnant trough near 22N/43W. Upper low drifting S to 15N in 24-36 hrs. Upper level jet and surface trough causing bkn cld & sct shws/tsms from ITCZ to 15N between 25W-45W next 48hrs.

SYNOPSIS: High pressure (1028mb) near 37N/18W supported by upper level ridge with axis along 20W from 25N beyond 45N. Ridge breaking down causing high to weaken while tracking E to Iberian Peninsula in 24hrs. Upper level trough along 45W from 17N beyond 35N. Cld & widespread shwrs/tsms E of trough to 39W between 20N-35N moving slowly E next 24 hrs. Base of trough cutting off in 24hrs to develop upper level low near 20N/45W. Uppr low drifting S to 15N in 48hrs with shwrs/tsms likely in vicinity. Increasing clds/shws in vicinity of surface trough developing near 40W from ITCZ to 14N. E Atlantic high pressure (1028mb) near 35N/52W supported by Caribbean upper level ridge with axis along 60W from 10N beyond 35N. High moving SE to 30N/50W in 48hrs as ridge builds over central Atlantic. Trade winds S of 17N & W of 35W increasing in 24-36 hrs as high tightens pressure gradient.

SYNOPSIS: N Atlantic high (1029mb) near Azores (38N/27W) supported by upper level ridge with axis along 30W between 22N-40N. Ridge breaks down & high weakens while moving E to Iberian Peninsula in 48hrs. Trade winds N of 17N & E of 47W ease. Cld & widespread shwrs/tsms from 22N-33N between 42W-48W near upper level trough along 46W and mid-level trough along 41W. Stationary front from 32N/42W to 22N/52W. Low developing on front near 30N/42W in next 12 hrs & moving NE to Azores in 48hrs. Sct cld & isolated shwr associated with upper level trough from W Sahara to remnant upper low near 15N/40W. E Atlantic high pressure (1024mb) near 35N/65W supported by upper ridge building from Caribbean. High moving E to 35N/40W in 48hrs as ridge builds over central Atlantic. Trade winds S of 17N & W of 32W increasing in 36-48 hrs.

SYNOPSIS: N Atlantic high (1028mb) near 35N/30W with an upper level ridge axis along 29W between 15N-35N. High moving NE with similar strength to 37N/21W as ridge begins to weaken in 48hrs. Increased cld & widespread shwrs from 20N-30N between 44W-57W near upper level trough along 52W and mid-level trough along 47W. Sct clds & isolated showers within 100nm of stationary front from 26N/54W to 21N-68W. Very weak & broad upper level low stationary near 17N/40W next 48 hrs causing sct clds & isolated shwrs from 15N-20N between 37W-44W. Upper level ridge strengthening over the Caribbean in 36-48hrs as high moves E from U.S. to central Atlantic near 35N/50W.

SYNOPSIS: N Atlantic high (1027mb) near 34N/26W with an upper level ridge axis along 29W between 15N-32N. High & ridge nearly stationary with similar strength next 48hrs. E Atlantic high (1021mb) near 33N/55W moving rapidly ENE & absorbed by N Atlantic high in 12-24hrs. Cold front from 25N/55W to 35N/40W becoming stationary next 12 hrs & dissipating in 24-36 hrs.  Increased clds and sct shwrs within 80-100nm of front. Very weak upper level low near 17N/45W drifting east next 24hrs so only sct cld & isolated shwr from 15N-20N between 43W-47W. No defined surface trough extending N from ITCZ so only few/sct clds & isolated shwrs in ARC FX zones S of 17N.

Issued 0600 GMT 28 November 2009

SYNOPSIS: N Atlantic high (1028mb) near 36N/30W. High building across ARC FX zones E of 40W while slow drifting ESE to 34N/25W in 48hrs. High supported by strong upper level ridge with axis near 36W. Upper level low centered near 22N/49W with upper level trough extending SE to 14N/42W. This upper low/trough & the ridge to E are supporting a large area of increased cld & shwrs from 09N-28N between 39W-49W. A lull in convection over S'ern zones E of 39W because no well defined surface troughs imbedded & extending N from ITCZ.

SYNOPSIS: Large N Atlantic high pressure (1029mb) centered near 38N/34W.  High building into ARC FX zones while moving SSE to 34N/29W in 48hrs. Low pressure (1017mb) near 34N/19W moving ENE and absorbed in 24hrs. Surface troughs imbedded in the ITCZ causing increased cld & sct convection from 06N-22N between 19W-29W and from 02N-16N between 29W-40W. An upper level trough with axis near 50W between 10N-35N is supporting increased cld & widely sct convection from 13N-27N between 40W-55W.

Issued 0630 GMT 26 November 2009

SYNOPSIS: High pressure (1022mb) centered near 30N/25W extends from NE Africa to 23N/44W. High moving WSW to 28N/33W in 24hrs then absorbed by 1030mb N Atlantic high centered near 40N/35W. N Atlantic high building into ARC FX zones while moving S to 35N/33W in 48hrs. Low pressure (1019mb) near 35N/28W moving NE and absorbed in 36-48hrs. Surface trough with axis near 46W from 08N-19N. Increased cld and convective shwrs E of trough from 08N-17N between 32W-46W and from 06N-21N between 19W-32W. Additional cld and shwrs near upper level trough with axis near 48W from 20N-35N

SYNOPSIS: High pressure (1024mb) centered near 31N/21W extends from NE Africa to 22N/42W below an upper level ridge. High stationary next 24-36hrs then dissipating. New high (1030mb) moving SE from N Atlantic to near Azores in 48hrs. Low pressure (1017mb) near 35N/33W moving E along stationary front to 35N/04W in 48hrs. Surface trough axis near 41W from 04N to 17N. Increased cld & convective shwrs E of trough axis to 22W between 02N to 17N.  Additional cld & shwrs near upper level trough from 22N/44W to 10N/48W.

SYNOPSIS: High pressure (1027mb) over western Mediterranean. High extends SW beneath an upper level ridge over the eastern ARC FX zones. High moving S over N Africa and wkng to 1024mb in 24hrs. New high (1024mb) developing near 31N/23W in 24hrs & remaining stationary through 48hrs. Low (1014mb) near 32N/40W moving east to 33N/27W in 48hrs then dissipating. Upper level low centered near 22N/41W & a surface trough from 14N/34W to 5N/30W. Increased clds & isolated shwrs near surface trough.

Issued 0600 UTC 23/11/2009

SYNOPSIS: High pressure (1032mb) near 37N/17W. High moving E to W
Mediterranean (37N/02E) & wkng to 1027mb in 24hrs. High moving S to N Africa
and wkng to 1024mb in 48 hrs. High extends SW across eastern ARC FX zones
causing moderate pressure gradient through 48hrs. New low (1014mb)
developing along stationary front near 31N/38W in 24 hrs then drifting ENE &
dissipating near 33N/34W in 48hrs.

Issued 0730 UTC 22 /11/2009

SYNOPSIS: High (1034mb) near 36N/30W strengthening to 1036mb
& slowly moving E past Azores to 36N/20W in 24 hrs. High workng to 1026mb while moving E over Iberia in 24 hrs. Stationary front across northern Alfa, Bravo & Charlie, between 27N and 30N, dissipating in 24-36 hrs. Sct shwrs & increased cld near the stationary front.

During the Rally a daily weather forecast is sent to the fleet via e-mail, and relayed again over the SSB radio net. A professional meteorologist produces the forecast specifically for the fleet and gives a 24 hour forecast with a further 24 hours outlook. It is written based on a Sea Areas Map covering the route across the Atlantic and uses a number of abbreviations. Further details regarding the daily weather report and Sea Areas Map will be given at the skippers briefing prior to the start.