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ARC WEATHER 27/11 0600Z - FORECAST UPDATE #3



ARC WEATHER 27/11 0600Z - FORECAST UPDATE #3
27/11/2014


Synopsis: High pressure centred near 34N/45W will weaken as it drifts SE to near 31N/36W by late tomorrow, then turning more NE to near 34N/32W by late 29/11. An axis of modest ridging extends ESE from the center to between the Canary Islands and the Cape Verde Islands and this ridge axis will weaken/broaden as it shifts S to just north of the Cape Verde Islands thru tomorrow night.

One gale center west of s'rn Portugal will weak quickly today. A potent front will move SE across the Canary Islands early tomorrow, and continue SW to near 20N by late 29/11 as it weakens.

Conclusion: Swells will be highest in n'rn grids AA, BB and CC. Particularly higher swells are expected in grid BB and all n'rn exposed areas of grid AA. Swells will also be highest north of 25N and east of 30W due to aforementioned gale. Swells will be lowest in grids HH and GG, with slightly enhanced swells north of 21N in grid GG. Overall swells will build thru 28/11, then will lower in the long range as gale weakens thru 30/11. Similarly, winds will gradually freshen in grids AA, BB and CC, with highest winds in n'rn half of AA, BB, and CC. With lighter winds expected in s'rn grids GG and HH.=A0 Locally enhanced winds/swells are expected traveling in between islands thru 29/11.

T = 27/11 0600 UTC

ISOLATED SHWRS/SQUALLS* IN ALL GRID AREAS

AA:
T: WINDS W-NW 13-18KTS SEAS 2-4 SWELLS W-NW 5-7FT (2SEC) SKIES PARTLY CLDY. CURRENTS FROM NE @ 0.2KTS.
T+12: WINDS W-NW 16-21KTS SEAS 4-6 SWELLS W-NW 6-8FT (2SEC) SKIES PARTLY CLDY. CURRENTS FROM NNW @ 0.2KTS.
T+24: WINDS W-NW INCREASE 20-30KTS. SEAS 6-7 SWELLS W-NW=A0 8-10FT (3SEC) SKIES PARTLY CLDY CURRENTS FROM WNW @ 0.3KTS.
T+36: WINDS SW-W 30-35KTS SEAS 5-7 SWELLS W-NW BUILD 10-15FT (3SEC) SKIES PARTLY CLDY CURRENTS FROM W @ 0.7KTS.

BB:
T: WINDS N-NW 18-23KTS SEAS 3-4 SWELLS NW-N 10-13FT (6SEC) SKIES PARTLY CLDY CURRENTS FROM ESE @ 0.7KTS.
T+12: WINDS NW-N 22-27KTS SEAS 4-6 SWELLS NW-N 12-15FT (5SEC) SKIES PARTLY CLDY CURRENTS FROM ENE @ 0.4KTS.
T+24: WINDS W-NW 26-31KTS SEAS 5-7 SWELLS NW-N 15-18FT (5SEC) SKIES PARTLY CLDY CURRENTS FROM SE @ 0.2KTS.
T+36: WINDS W-NW 25-30KTS SEAS 5-7 SWELLS NW-N BUILD 17-23FT (7SEC) SKIES MOSTLY CLDY CURRENTS FROM NE @ 0.8KTS.

CC:
T: WINDS NW-N 15-24KTS SEAS 3-5 SWELLS N-NE 7-10FT (7SEC) SKIES MOSTLY CLDY CURRENTS FROM ESE @ 0.2KTS.
T+12: WINDS NW-N 18-23KTS SEAS 2-4 SWELLS N-NE 10-13FT (7SEC) SKIES PARTLY CLDY CURRENTS FROM SE @ 0.3KTS.
T+24: WINDS NW-N 16-21KTS SEAS 3-5 SWELLS N-NE BUILD 12-16FT (7SEC) SKIES PARTLY CLDY CURRENTS FROM NE @ 0.3KTS.
T+36: WINDS NW-N 19-24KTS SEAS 3-5 SWELLS N-NE BUILD 15-20FT (7SEC) SKIES PARTLY CLDY CURRENTS FROM E @ 0.3KTS.

GG:
T: WINDS N-NE 22-27KTS SEAS 3-5 SWELLS N-NE=A0 8-11FT (2SEC) SKIES MOSTLY CLDY CURRENTS FROM SSW @ 0.4KTS.
T+12: WINDS N-NE 19-24KTS SEAS 2-4 SWELLS N-NE 9-12FT (2SEC) SKIES PARTLY CLDY CURRENTS FROM WSW @ 0.8KTS.
T+24: WINDS N-NE 16-21KTS SEAS 1-3 SWELLS N-NE 10-13FT (2SEC) SKIES PARTLY CLDY CURRENTS FROM WSW @ 0.8KTS.
T+36: WINDS N-NE 14-19KTS SEAS 2-4 SWELLS N-NE 10-13FT (2SEC) SKIES PARTLY CLDY CURRENTS FROM W @ 1KTS.

HH:
T: WINDS NE-E 22-27KTS SEAS 3-5 SWELLS N-NE 8-11FT (6SEC) SKIES MOSTLY CLDY CURRENTS FROM NE @ 0.3KTS.
T+12: WINDS NE-E 18-23KTS SEAS 2-4 SWELLS N-NE 9-12FT (6SEC) SKIES PARTLY CLDY CURRENTS FROM ENE @ 0.2KTS.
T+24: WINDS NE-E 16-21KTS SEAS 2-4 SWELLS N-NE 7-10FT (6SEC) SKIES CLDY CURRENTS FROM NNW @ 0.1KTS.
T+36: WINDS N-NE 12-17KTS SEAS 2-3 SWELLS N-NE=A0 6-9FT (5SEC) SKIES PARTLY CLDY CURRENTS FROM N @ 0.3KTS.

* WINDS AND SEAS HIGHER IN SQUALLS