Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 9:31AM||Sunset 4:53PM||Saturday January 25, 2020 5:37 PM PST (01:37 UTC)||Moonrise 9:43AM||Moonset 5:10PM||Illumination 1%|
7 Day Forecast for Marine Location Near Yakutat CDP, AKHourly EDIT Help
Area Discussion for -  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXAK67 PAJK 252344 AFDAJK
Southeast Alaska Forecast Discussion National Weather Service Juneau AK 244 PM AKST Sat Jan 25 2020
SHORT TERM. Complex and high impact winter weather forecast over the next 24 to 48 hrs. Winter Storm Warnings are in effect for all of northern SE Alaska as of this writing. Expect another 2 to 4 inches of snow accumulation on top of the 2 to 4 that has already fallen in the Juneau area. Still pretty confident that enough low level mixing will occur this evening to transition the precipitation type to rain for Juneau, Gustavus, and Hoonah.
Further north, its a different story altogether. Strong arctic front noted on GOES 17 imagery and observations is draped from upper Lynn Canal SW into the central Gulf. Several southern stream waves will ride north along this tight baroclinic zone through Sunday. Increasing WAA over the arctic boundary this evening will lead to moderate to heavy snowfall for Haines and Skagway as well as the highways. The northeast Gulf coast will also get into the action by late evening as the arctic boundary begins to shift slightly W. Snowfall rates of 1 to 2 inches per hour are possible with the strength of the isentropic ascent (850-700mb flow of 40 to 60 kts).
As the first frontal wave lifts into the NE Gulf late tonight, the gradient in Lynn Canal will become more southerly, which may allow the surface winds at Haines and Skagway to flip to E and S respectively. At this time, the thinking is that the cold air will hang on longer than models indicate so went with a rain/snow mix or a change to rain near sea level by mid morning Sunday. In spite of this, it still looks as though 10 to 20 inches of new snow will have fallen by mid morning Sunday with the highest amounts likely near Haines and upper Klondike Highway.
For Yakutat, the initial wave will lift NE and be located just to the south of Yakutat Bay by late tonight. This will effectively shift the polar front just to their west briefly late tonight, before it surges back to the east early Sunday. Surface gradient never really allows a full mix out of the lower atmosphere with the low to their south and thus, while rain may mix in briefly late tonight, think for the most part the event will be all snow. Low level 1000-850mb thickness values also support this scenario. Likely will see 4 to 6 inches tonight with the initial surge of WAA. For Sunday, a second low level wave will ride northward along the polar front. This wave looks to track in a favorable position just to the east of Yakutat. Very strong low to mid level frontogenesis along the deep polar boundary, combined with low level convergence from the frontal wave may lead to a period of very heavy snowfall Sunday morning. Thus the Winter Storm Warning for storm totals of 10 to 13 inches through Sunday afternoon.
Further south, periods of moderate rainfall with gusty SE winds will continue through Sunday. Gales are likely over the outside waters with 25kt likely through most of the inner channels by early Sunday. Rain on top of snowpack for some areas will continue to cause slick roads and ponding of water.
After Sunday night, forecast confidence decreases dramatically, especially in regards to a third frontal wave and yet another intrusion of cold air from the Gulf. Thus elected to make very little change to the inherited forecast after Sunday.
LONG TERM. /Monday through Saturday/As of 10 PM Friday/We begin the period Monday with ongoing precipitation occurring regionwide associated with a wave spinning around low pressure in the Gulf. Temperatures though will be in the middle of an upward trend though to start this period with consistent southerly flow into the panhandle. Multiple locations are likely to top out in the 40s several times next week. This will result in p-type issues throughout the week with many in the central to norther panhandle likely to see at the least snow mixing in with rain. Areas to the south most likely stay warm enough that any precip will be rain. However, areas furthest north such as Haines, Skagway and Yakutat will see the best chances at significant snowfall as nighttime temps will still be cold enough to support snow rather than rain. Thus our Monday storm also begins a period where multiple disturbances will continue to impact the region over the long term as the pattern remains very progressive and continued southerly flow will provide enough moisture that no prolonged breaks in precipitation can be easily anticipated.
Model agreement on exact timing and impacts of these various disturbances this far out remains pretty poor, but enough agreement does exist that the conditions around Tuesday night into Wednesday will be the wettest and probably also the windiest. WPC guidance insists that this low will be very tightly wound and storm force winds may be possible particularly in the open Gulf, but also strong winds making their way into the inner channels. Have opted not to bite off on this whole heartedly in the current forecast, but did raise winds in the open water notably to make note that we will be looking at future guidance to determine just how impactful this storm will be. Models are also showing another storm late week, but the discrepancies between solutions at this point are far too great to make any real determination of much or how little this one will do.
AJK Watches/Warnings/Advisories. PUBLIC . Strong Wind until 6 PM AKST this evening for AKZ018-027. Winter Storm Warning until 9 PM AKST this evening for AKZ025. Winter Weather Advisory until 9 PM AKST this evening for AKZ020>022. Strong Wind from late tonight through Sunday morning for AKZ023. Strong Wind until 3 PM AKST this afternoon for AKZ028. Winter Storm Warning from 6 PM this evening to 9 PM AKST Sunday for AKZ018-019. Winter Storm Warning until 3 PM AKST Sunday for AKZ017. MARINE . Gale Warning for PKZ036-041>043-051. Small Craft Advisory for PKZ012-013-022-033>035-052-053.
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|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|YATA2 - 9453220- Yakutat, AK||7 mi||49 min||40°F||990.6 hPa|
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