Thursday, January23, 2020
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Marine Weather and Tides
Cordova, AK

Version 3.4
NOTICE
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 9:38AMSunset 4:44PM Thursday January 23, 2020 5:47 PM AKST (02:47 UTC) Moonrise 9:13AMMoonset 2:58PM Illumination 1% Phase: Waning Crescent; Moon at 29 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PKZ126 Port Valdez- 342 Pm Akst Thu Jan 23 2020
.heavy freezing spray warning Friday night...
Tonight..NE wind 15 kt. Seas 3 ft. Freezing spray.
Fri..NE wind 15 kt. Seas 3 ft. Freezing spray.
Fri night..NE wind 15 kt. Seas 3 ft. Heavy freezing spray.
Sat and Sat night..NE wind 15 kt. Seas 3 ft.
Sun..NE wind 15 kt. Seas 3 ft.
Mon through Tue..NE wind 10 kt. Seas 2 ft.


7 Day Forecast for Marine Location Near Cordova, AK
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location: 60.38, -145.4     debug


Area Discussion for -
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FXAK68 PAFC 240206 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 506 PM AKST Thu Jan 23 2020

ANALYSIS AND UPPER LEVELS.

The upper level pattern with a trough over the mainland part of the state and ridge over the Bering persists. The surface low track remains south of the Aleutians out west. In the GUlf a low can be seen near Middleton Island as the cold advection off the Aleutian range gets wrapped up in it and keeps it nearly stationary. That cold advection can be seen best of visible satellite out of the gaps and channeled terrain from Resurrection Bay southwestward to the Alaska Peninsula.

MODEL DISCUSSION.

Models remain in good agreement into Saturday around the region and the Bering Sea area remains under good agreement into next week. The issue in in the Gulf of Alaska by Saturday night when a complex low starts to give the models fits as to how it will develop and where the main low centers in it will be.

AVIATION. PANC . VFR conditions and light (mostly) north winds are expected to persist into Friday.

SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2).

Colder temperatures are expected to settle across the region tonight as cold air advects from the interior to the Gulf of Alaska. Gusty conditions develop through channeled terrain this evening with gusts already established across the western gulf. The strongest gusts are expected through typical areas such as Seward, Thompson Pass, Whittier, Matanuska Valley, Broad Pass and Copper River Delta. Mostly dry conditions are expected for inland location and the western Gulf, with isolated to scattered snow showers across the northeastern Gulf. The next front to monitor develops across the eastern Gulf late Saturday, taking a slow northwest track through Sunday. Increased snow chances along the northeast Gulf coast on Sunday as models all show the boundary pushing to Cordova in the morning. .

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 through 3/Tonight through Sunday) . A blocking ridge over the eastern Bering Sea will lead to cold, windy, and dry conditions across Southwest Alaska over the next few days. Northerly flow will continue to advect clouds across the Kuskokwim Valley and Kuskokwim Delta tonight, but expect at least partial clearing by Friday as colder and drier air advects southward from the Arctic. The magnitude of cold air advection across Southwest Alaska will be weak through Friday night, though both the ridge to the west and a low in the Gulf of Alaska will strengthen with time, leading to tighter pressure gradients and stronger winds. The presence of clouds and wind will initially limit temperature drops, but generally expect a steady downward trend in temperatures over the next couple days. For those areas exposed to the winds, this will also lead to falling wind chill temperatures. Have made some adjustments to existing wind chill advisories for the Kuskokwim Delta and Bristol Bay to delay the onset of the coldest wind chills (-40 degrees or colder). Further adjustments will likely be needed as we fine-tune the temperature and wind forecasts.

The strongest winds will be along the south side of the Alaska Peninsula, as cold air funnels through the bays and mountain passes. As we head through the weekend the a digging trough over the Gulf will push the Bering ridge westward and the low level flow will shift to a north to northeast direction. A reinforcing shot of cold air advection will cross Southwest Alaska Saturday night through Sunday and head toward the southern Alaska Peninsula. This change in flow will shift the strongest winds south and westward along the Alaska Peninsula. The persistent winds and cold air advection of the next few days will also lead to widespread areas of Heavy Freezing Spray across the Southwest Alaska coastal waters. With the significant surge of cold air over open waters of the eastern Bering Sea on Sunday, would also expect development of snow showers.

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 through 3/Tonight through Sunday) . A compact, but potent low south of the western Aleutians will become vertically stacked tonight, slowing the westward progression of the low. It will then weaken as it continues to the far western Bering Sea Friday through Friday night. Meanwhile, an occluded front strung out along the western to central Aleutians will lift slowly northward tonight, then stall on Friday. A core of storm force winds ahead of the front will shift from the western to central Aleutians northward into the Bering Sea offshore zones tonight, then gradually diminish through Saturday. Expect periods of rain and snow, with surface temperatures along the Aleutians remaining largely above freezing. Another Pacific low will approach the Aleutians Saturday night through Sunday, leading to restrengthening of winds. The prevailing wind will remain easterly over the next three days across the western half of the Bering Sea and along the Aleutian chain.

MARINE (Days 3 through 5: Saturday through Monday).

Gulf of Alaska:

An occluded low and a surface low will persist over the Gulf of Alaska Saturday, Sunday and Monday bringing moisture to the region. Strong high pressure over the mainland coupled with the low pressure in the Gulf will produce strong offshore flow winds, especially near the Barren Islands and Kamishak Bay. Gale force winds and heavy freezing spray possible.

Bering Sea and Aleutians:

A strong low south of the western Aleutians will keep widespread gales with the possibility of isolated storms across the central and western Bering Saturday and Sunday. Freezing spray will continue to impact portions of the Bering. Winds will decrease by Monday.

LONG TERM FORECAST (Days 4 through 7).

Looking at the synoptic pattern, expect low pressure over the Gulf of Alaska and south of the Aleutians with a dense cold airmass building up over the mainland. Below normal temperatures will continue for western Alaska and southcentral Alaska. This setup will result in enhanced gap winds through the coastal mountains with precipitation mainly along the coastal regions of the Gulf.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . Wind chill advisory 155 161. MARINE . Gale 119-121 127 129-132 138 150 155 170 172-174 178 185 Storm 175 176 177 Heavy Freezing Spray 126 127 129 130 132 138 139 141 150-165 179 180 185 FIRE WEATHER . NONE.

SYNOPSIS AND MODEL DISCUSSION . BB SOUTHCENTRAL ALASKA . KH SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . SEB MARINE/LONG TERM . PJS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CRVA2 - 9454050- Cordova, AK 22 mi54 min SE 1.9 G 5.1 27°F 41°F990.6 hPa
VDZA2 - 9454240 - Valdez, AK 72 mi54 min ESE 16 G 21 25°F 42°F993.4 hPa
46061 - Seal Rocks 55NM South of Valdez, AK 77 mi58 min WNW 23 G 29 26°F 42°F3 ft990.3 hPa (-0.3)

Wind History for Cordova, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cordova, Merle K (Mudhole) Smith Airport, AK10 mi55 minWNW 510.00 miOvercast19°F16°F88%991.4 hPa

Link to 5 minute data for PACV

Wind History from ACV (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW5
1 day agoCalmCalmCalmCalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoE4E3NE5E3E3E7E10E8SE9E8E5E4E4E4E4NE4CalmCalmCalmCalmS3CalmCalmS3

Tide / Current Tables for Pete Dahl Slough, Copper River Delta, Alaska
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Eyak River entrance, Alaska
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Eyak River entrance
Click for Map
Thu -- 01:09 AM AKST     9.34 feet High Tide
Thu -- 06:59 AM AKST     3.86 feet Low Tide
Thu -- 09:14 AM AKST     Moonrise
Thu -- 09:19 AM AKST     Sunrise
Thu -- 12:19 PM AKST     12.00 feet High Tide
Thu -- 02:59 PM AKST     Moonset
Thu -- 04:30 PM AKST     Sunset
Thu -- 07:45 PM AKST     -1.59 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.69.39.18.36.95.44.33.94.66.58.910.911.911.810.78.86.13.10.5-1.2-1.5-0.22.35.2

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Middleton Is., AK
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.