Monday, January20, 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 9:44AMSunset 4:36PM Monday January 20, 2020 6:01 PM AKST (03:01 UTC) Moonrise 5:48AMMoonset 12:48PM Illumination 17% Phase: Waning Crescent; Moon at 26 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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PKZ119 Cape Suckling To Cape Cleare- 326 Pm Akst Mon Jan 20 2020
.small craft advisory tonight...
Tonight..SW wind 20 kt decreasing to 10 kt after midnight. Seas 8 ft.
Tue..Variable wind 10 kt. Seas 6 ft.
Tue night..Variable wind 10 kt. Seas 5 ft.
Wed..Variable wind 10 kt. Seas 5 ft.
Wed night..N wind 15 kt. Seas 5 ft.
Thu through Sat..NE wind 20 kt. Seas 8 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 210207 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 507 PM AKST Mon Jan 20 2020

ANALYSIS AND UPPER LEVELS. The pattern is dominated by a broad upper level trough centered over the West Coast of AK. This is not an overly strong feature, but just happens to be in the right location to take advantage of some moisture over the North Gulf Coast up through Cook Inlet. The moisture is associated with a weak surface low sitting just south of the Kenai Peninsula. As this trough continues to take on a negative tilt today, it is aiding in lifting the moisture through the column. With cold air in place, the net result in fairly widespread snow from the Kenai Peninsula up through the Mat-Su Valleys and over to Valdez. We had a few reports of near 6 inches from Kenai early this morning and it continues to snow from Kenai north. Over the Bering, cold air advection snow showers continue to be the dominant feature. For SW AK, there is plenty of low stratus spreading over the area with some patchy fog mixing in, especially along the coast.

At 300 mb (30,000') the jet is supporting the trough over the West Coast at about 85 kts. The rest of the primary storm track is over the North Pacific, well south of the mainland.

MODEL DISCUSSION. In general, the models are handling the overall synoptic pattern with good consistency. However, without a strong system to latch onto, they are struggling to resolve the finer details. Some of these finer details surround the bands of snow over the Northern Kenai and the Anchorage Bowl. The GFS continues to be the driest with this set up, but it remains the outlier. This forecast package will lean mostly towards the hi-res models and some hand edits, especially in handling this banded precipitation. Forecast confidence overall remains moderate.

AVIATION. PANC . IFR visibility will persist in snow through much of the forecast period. Ceilings will linger in the MVFR range, but could easily drop to IFR in heavier snow. The timing of when snow ends is highly uncertain. It certainly looks to become lighter as we go through the overnight hours which should allow ceilings and vis to come up some.

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3; Tonight through Thursday) .

The surface low just south of Whittier will slowly drift north through the evening. Light snow is expected to continue for portions of Southcentral as a trailing upper level trough lifts over the area. Another one to two inches of snow is possible from north of Kenai up across the Mat-Su Valleys. A mix of rain/snow is still possible through the overnight hours across parts of Prince William Sound as the southerly flow ahead of the low has ushered in enough warm air from the Gulf to push temperatures above the freezing mark. Temperatures will hold steady in the teens and twenties tonight and tomorrow for the Kenai Peninsula north to the Susitna Valley. For the Copper River Basin, temperatures will remain a few degrees on either side of 0F. Precipitation will slowly taper off overnight across the Kenai Peninsula and through Tuesday night elsewhere as the upper trough moves north beyond Southcentral. This will allow the flow aloft to turn northerly, ushering in a colder and drier air mass for the second half of the week. The northerly flow will also reestablish the gusty, northerly outflow winds through the passes and along the immediate coast by Thursday as arctic air spills south across Southcentral and temperatures plunge back to values we saw prior to this current storm.

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

Snow showers along the Kuskokwim Delta coast will move farther inland and then taper off through the night as a front weakens over the area. Snow accumulations should be minimal with this system as it moves in towards Bethel for the early morning hours. With lingering moisture across the region, expect low level stratus and patchy fog to persist overnight and into the morning hours for Tuesday for the Kuskokwim Delta and even into interior Bristol Bay. Cold temperatures will remain across Southwest Alaska through the week as an Arctic air mass moves in from the northwest into the mainland on Tuesday. Cold temperatures will continue to move in through Thursday, when strong cold advection will bring northerly flow and gusty conditions to interior Bristol Bay and the Alaska Peninsula.

SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2).

Cold, unstable air persists across the Bering this afternoon, which will keep snow showers in the forecast through Tuesday. The Pribilof Islands will likely see snow showers continuing through the night, tapering off by the early morning hours.

Attention quickly shift towards the western Bering on Wednesday morning when a strong North Pacific low enters the forecast area. This system will cross over the Chain into the western and Central Bering by Wednesday afternoon, with precipitation quickly transitioning from snow to rain as warmer air moves in with this low. Expect high end gale force winds accompanying this system, with gust to storm force level as it moves over the Bering.

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

Gulf of Alaska:

A low over the eastern Gulf Thursday will turn westward and move to near Middleton Island by Friday morning. The low will stall out and remain nearly stationary through Saturday morning, then dissipate or get absorbed into a new low moving into the eastern Gulf Saturday evening. This will keep gales ongoing continuously across the Barren Islands and through bays and passes southwest of Kodiak Island through Friday. The gales may weaken to small craft winds on Saturday, depending on where the low is at that point and where the next low moves into the eastern Gulf. Significant forecast uncertainty persists on Saturday.

Bering Sea and Aleutians:

A strong and nearly stationary low centered south of the western Aleutians will keep widespread gales with occasional embedded storms ongoing across the central and western Bering through Friday. Seas of 20 to 35 ft are expected over a large area of the central and western Bering and Aleutians through Friday night. By Saturday the low will move to near Kamchatka, which will result in gradually diminishing winds over the western Bering on Saturday. Strengthening high pressure over the eastern Bering will cause gale force offshore winds to develop Friday night through Saturday from the Southwest Alaska coast. The gales will extend south through the bays and passes of the Alaska Peninsula and eastern Aleutians by Saturday evening.

LONG TERM FORECAST (Days 3 through 7: Thursday through Monday).

The stagnant weather pattern intensifying on Thursday will persist through the weekend, and potentially last even longer. A strong and nearly stationary low centered south of the western Aleutians will keep gale force winds and rain ongoing across the central and western Aleutians through at least Friday night. On Saturday, the low moves off to the Kamchatka Peninsula, but another North Pacific low may move in to the same area to replace the old one into Monday. There is significant model uncertainty about where the new low tracks, however.

Meanwhile, across the eastern Bering and mainland Alaska, high pressure will strengthen with time through at least Saturday. After that there is some model disagreement as to how quickly the high pressure moves westward into the Bering. The GFS is much faster moving the high westward than the foreign models. Either way, the high will support increasingly cold air flooding southward on strong winds across Southwest Alaska, the eastern Bering, and the gaps and passes of Southcentral from Saturday through Monday. This will be a favorable pattern for another round of wind chill hazards in these same areas.

Across the Gulf, the weather will remain unsettled as a low over the eastern Gulf on Thursday moves to near Middleton Island on Friday morning, then parks itself there and spins moisture, very likely in the form of snow given the cold air around, into coastal areas. Since the low will be relatively weak and hardly moving, any snow that falls is not expected to become heavy, but it looks to persist in some areas through Saturday. There is considerable uncertainty on who gets what amount of snow and when, so stay tuned for future forecast updates. By Monday, with the high gradually drifting west over the Bering, the storm track may begin to shift westward along with it into the Gulf and Southcentral, which, if it occurs, would bring back more seasonably cold temperatures, and much greater threats for snow into Southcentral.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . NONE. MARINE . Heavy Freezing Spray 150 160 180 185. FIRE WEATHER . NONE.

SYNOPSIS AND MODEL DISCUSSION . MSO SOUTHCENTRAL ALASKA . CK/TM SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . AH MARINE/LONG TERM . JW


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CRVA2 - 9454050- Cordova, AK 22 mi49 min 34°F 40°F995.2 hPa
VDZA2 - 9454240 - Valdez, AK 72 mi49 min 21°F 43°F996.4 hPa
46061 - Seal Rocks 55NM South of Valdez, AK 77 mi71 min S 9.7 G 14 37°F 40°F6 ft994.2 hPa (+1.6)

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 mi68 minVar 39.00 miUnknown Precip34°F32°F92%995.8 hPa

Link to 5 minute data for PACV

Wind History from ACV (wind in knots)
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Last 24hrE9SE8E8E8E11
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1 day agoCalmCalmE3CalmCalmCalmCalmE4--CalmCalmE3CalmCalmCalmNE3SE3Calm3E5E73
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2 days agoCalmCalmCalmCalmE6CalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalmCalm--CalmCalmCalm

Tide / Current Tables for Pete Dahl Slough, Alaska
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Pete Dahl Slough
Click for Map
Mon -- 03:33 AM AKST     4.15 feet Low Tide
Mon -- 05:47 AM AKST     Moonrise
Mon -- 09:23 AM AKST     Sunrise
Mon -- 09:35 AM AKST     10.56 feet High Tide
Mon -- 12:47 PM AKST     Moonset
Mon -- 04:21 PM AKST     Sunset
Mon -- 05:04 PM AKST     0.38 feet Low Tide
Mon -- 11:06 PM AKST     7.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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65.34.64.24.256.37.99.410.410.59.78.36.34.12.20.90.40.823.75.56.77.2

Tide / Current Tables for Eyak River entrance, Alaska
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Eyak River entrance
Click for Map
Mon -- 03:53 AM AKST     4.05 feet Low Tide
Mon -- 05:49 AM AKST     Moonrise
Mon -- 09:25 AM AKST     Sunrise
Mon -- 09:43 AM AKST     11.36 feet High Tide
Mon -- 12:48 PM AKST     Moonset
Mon -- 04:22 PM AKST     Sunset
Mon -- 05:24 PM AKST     0.28 feet Low Tide
Mon -- 11:14 PM AKST     8.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.75.84.94.34.14.76.17.99.71111.310.79.27.252.81.10.30.51.73.55.67.38

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (22,6,7,8)
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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.