marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 831 am PDT Thu Apr 24 2014
.Forecast discussion: major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.
For the fcst update...will allow gales to expire over the wrn wash and Oregon waters. Assd sfc low has mvd NE to 50n131w. This is a lttl fthr N then model fcst...but the low is also 4 mb deeper than GFS 6 hr fcst. Gradient winds as obsrvd are to or just under GFS 30m winds gdnc. Seas are at about or about a ft below WV gdnc. Adjstd seas dwn some ovr the nrn waters. Otw...wl only make only minor changes for the fcst update.
----------------------------------------------------------------- Previous discussion...
Low pres was ovr the nrn WA wtrs early this mrng. Mdls are smlr with low movg NE and N of the area tda while becomg wkr. Ovr the offshr wtrs wl allow gales ovr the WA wtrs to expire and hav winds to 30 kt init...then wkn later this aftn and tngt. Elsw alg the srn CA wtrs wl hav winds to 25 kt tdy and tngt assoc with a coastal trof. A stg cd fnt wl approach the nrn offshr wtrs Fri ngt...and cross into the WA/OR/nrn CA wtrs. Wl cont to hav gales over the WA into the or wtrs Sat inadvof fnt. GFS/Gem rmns consistent with gales with UKMET and ECMWF wkr. On Sat GFS/ECMWF strengthen coastal trof alg the ern areas of the cntrl and srn CA wtrs. Wl stay with 30 kt ovr this region Sat into sun. Mdl kps winds stg ovr this region into Mon...altho with some weakening. The ECMWF WV guid dvlps seas svrl ft higher than the wwiii guid.
Seas...plan to blend the wwiii with the ECMWF WV guid 40/60 thru the fcst pd. There are few diffs thru the fcst pd with greatest diffs occurring ovr the srn CA wtrs where ECMWF is higher than wwiii.
.Extratropical storm surge guidance...N/A.
.Warnings...Preliminary. Any changes will be coordinated through AWIPS 12 planet chat or by telephone:
.Pz5 Washington/Oregon waters... .pzz800...inner waters from Cape Flattery to Cape Shoalwater... gale possible Sat. .Pzz900...Outer waters from Cape Flattery to Cape Shoalwater... gale possible Sat. .Pzz805...Inner waters from Cape Shoalwater to Cape Lookout... gale possible Sat. .Pzz905...Outer waters from Cape Shoalwater to Cape Lookout... gale possible Sat. .Pzz810...Inner waters from Cape Lookout to Florence or... gale possible Sat. .Pzz910...Outer waters from Cape Lookout to Florence or... gale possible Sat. .Pzz815...Inner waters from Florence or to point St. George... gale possible Sat.
.Pz6 California waters... None.
.Forecaster prosise/Rowland. Ocean prediction center.