Sunday, June24, 2018 L-36.com


Marine Weather and Tides
Kachemak, AK

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 4:17AMSunset 11:46PM Sunday June 24, 2018 8:39 AM AKDT (16:39 UTC) Moonrise 5:40PMMoonset 1:41AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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
    EDIT      (on/off)   Help
PKZ141 Kachemak Bay- 356 Am Akdt Sun Jun 24 2018
Today..Variable wind less than 10 kt becoming sw 15 kt in the afternoon. Seas 2 ft building to 4 ft in the afternoon.
Tonight..SW wind 15 kt becoming se 10 kt after midnight. Seas 2 ft.
Mon..S wind 10 kt becoming sw 15 kt in the afternoon. Seas 2 ft building to 4 ft in the afternoon.
Mon night..S wind 15 kt. Seas 2 ft.
Tue through Thu..E wind 10 kt. Seas 2 ft.

7 Day Forecast for Marine Location Near Kachemak, AK
   Hourly   EDIT   Help
location: 59.67, -151.45     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxak68 pafc 241322
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
522 am akdt Sun jun 24 2018

Analysis and upper levels
Southwestward propagating scattered showers linger from the
copper river basin to the talkeetnas as the first of two upper-
level shortwaves continues its westward progression over southern
alaska. Scattered showers are also lingering over northern
portions of the akpen aided in part by orographic enhancement from
a weak northerly flow and a weak trough extending along the
alaska range. Farther west, IR satellite shows an increase in mid-
and upper-level cloud cover across the central aleutians as the
next storm system begins to take shape.

Any well-organized storm activity remains south of our region as
the longwave trough over the bering keeps the jet over the north
pacific. Instead, our weather continues to be dictated by
shortwave troughs in the mid-levels ejecting from two broad area
of circulation. The first is a 545dm low in the northeastern gulf
pinwheeling easterly waves across southern alaska. This will
continue to bring the threat for scattered showers and
thunderstorms through Monday. The second, a broad 540dm low in
the northern bering, is ejecting shortwaves along the aleutians.

This is helping spin up a weak surface low and steer a front
across the aleutians.

Model discussion
The models are all still in good agreement with the large-scale
synoptic features. The NAM and GFS are also in better agreement as
to the timing and placement of the second shortwave moving east
to west across southern alaska today. Models keep lingering
showers over interior southcentral alaska this morning with
another round of showers and isolated thunderstorms firing up over
the copper river basin, talkeetnas and interior portions of
southwest alaska this afternoon and evening.

Aviation
Panc...VFR conditions and light winds will persist. Conditions
could approach MVFR briefly this morning depending on how much
shower activity approaches the airport.

Short term forecast southcentral alaska (today through Tuesday)
There is a distinct difference between the relatively benign
weather over the gulf from weak high pressure and the much more
active and showery weather over the south mainland from a series
of easterly waves pushing through the region. The first of which
has brought widespread rainfall to the copper river basin
overnight, and will continue spreading westward into the susitna
valley this morning where it will persist into the evening. There
remains uncertainty in how far south these showers will develop,
leading to lower confidence in the pop forecasts for the anchorage
bowl and matanuska valley today. Instability looks slightly
stronger than what occurred yesterday afternoon, which should
allow for more lightning strikes over the northern copper river
basin and talkeetnas this afternoon. While most of the
thunderstorm activity will dissipate by late this evening, the
continued track of weak easterly waves moving over the area will
keep showers in the forecast from the kenai peninsula northward
into Monday.

Starting Monday, model agreement begins to break down as a
shortwave trough moving northward though the gulf begins to
interact with the easterly waves over the mainland. This
disagreement continues to impact forecast confidence and finer
scale details in the pop forecast. In general the forecast is for
cloudy and showery weather will persisting through Monday,
especially for the copper river basin susitna valley which should
continue to see the most widespread shower activity.

Short term forecast southwest alaska (Sunday and Monday)
Generally quiet conditions are in place across much of southwest
alaska to start out this morning. The exception are an area of
scattered to numerous showers generally north of king salmon and
east of dillingham. The rest of the area is under mostly cloudy
skies. During the day Sunday, a thermal trough building
southwestward out of interior alaska will increase the instability
for much of the area north of the nushagak hills. Widespread
showers with isolated embedded thunderstorms are expected across
the lower kuskokwim valley late this morning through the
afternoon. Convective activity that largely initiates along the
nushagak hills, kuskokwim mountains the the alaska range north of
lake iliamna will drift northwestward with time, extending the
threat of isolated thunderstorms to bethel and points north and
east this evening.

A northward moving atmospheric wave on Monday will confine the
thunderstorm activity largely to the immediate kuskokwim valley
and points north, with significant initiation expected off the
alaska range midday as well. The wave will bring in a more stable,
cool, moist air mass to southwest alaska, making Tuesday a
noticeably cooler day with considerable cloud cover expected
area-wide.

Short term forecast bering sea aleutians (Sunday and Monday)
A large, elongated low currently over the western aleutians and
its associated front is causing a widespread area of precipitation
from adak eastward through almost to dutch harbor this morning.

This feature will be the primary weather maker across the bering
for the first half of the week. Tonight, the triple point low
developing east of the parent low will take over as the primary
low near adak. That low will slowly drift eastward through Monday,
weakening as it does so. Thus, the steady heavier precipitation
will diminish with time into a scattered shower regime by Monday.

Long term forecast (days 3 through 7)
A long wave pattern across the state will bring a persistent
pattern of diurnal showers inland and periods of light rain across
the bering and gulf of alaska. The low pressure center will
reside near the alaska peninsula during the long range forecast. A
surface low organizes Tuesday night as two strong waves of energy
merge together as they wrap around the core of the low. This will
send a relatively weak front to the southern mainland on
Wednesday with lingering showers through the end of the week as
the organized low slowly fills while it spins near the alaska
peninsula. The to the west of this system, low clouds and patchy
fog will be the main theme for the western aleutians and bering as
a ridge builds from the north pacific. Only minor changes were
made for updates as models are in relatively good agreement with
the synoptic pattern through the end of next week.

Afc watches warnings advisories
Public... None.

Marine... None.

Synopsis and model discussion... Tm
southcentral alaska... Dek
southwest alaska bering sea aleutians... Jw
long term... Kh


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HMSA2 5 mi38 min ENE 5.1 G 9.9 48°F 1015.3 hPa41°F
HMRA2 - Kachemak Bay Reserve, AK 5 mi70 min NNE 1.9 1015 hPa
OVIA2 - 9455500 - Seldovia, AK 21 mi58 min 47°F1015.5 hPa
FILA2 - Flat Island Light, AK 37 mi40 min SE 1.9 G 1.9 48°F 1015.4 hPa (-0.8)41°F
AMAA2 - East Amatuli Light, AK 59 mi40 min WSW 13 G 15 50°F 1015.4 hPa (-0.4)45°F

Wind History for Nikiski, AK
(wind in knots)    EDIT      (on/off)   Help
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
SW7
G10
SW6
SW7
SW4
G8
SW6
SW6
S7
S8
SW9
SW9
S9
S8
S8
S9
S11
SW13
S13
G16
S13
S12
G15
S12
G16
S14
S12
SW13
S11
G14
1 day
ago
SW13
SW10
G13
SW14
SW14
SW11
G14
SW15
SW12
SW13
G17
SW13
G16
SW9
G12
SW10
G13
SW10
S8
G11
S8
G11
S11
SW9
SW13
G16
SW14
G17
SW8
G11
SW10
G13
S11
S9
S7
SW6
2 days
ago
W3
N1
NW2
S10
S10
S7
S7
S6
S5
S5
S6
SW5
G8
S7
S6
S5
S10
S6
SW7
SW6
SW8
SW13
SW11
G14
S13
G16
SW11
G16

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Homer, Homer Airport, AK3 mi47 minN 010.00 miMostly Cloudy49°F44°F83%1015.8 hPa
Seldovia, Seldovia Airport, AK21 mi47 minSSW 310.00 miOvercast43°F39°F89%1015.6 hPa

Wind History from AHO (wind in knots)
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last 24hrCalmS3W5W5W8W76SW6W12W13
G17
W13W9SW7SW6SW6W3NE4CalmCalmNE5NE3CalmN3Calm
1 day agoW6W5W5W7W9W12W11
G18
W12
G17
W12W7SW7SW7SW7SW6W6SW6SW8W5W4W3CalmCalmCalmN4
2 days agoW5W3CalmN3CalmNW3W6SW4W6W7W6W8W7W3W6W10W4W4W4W4W3W3W4W7

Tide / Current Tables for Homer, Kachemak Bay, Cook Inlet, Alaska
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Homer
Click for Map
Sun -- 12:09 AM AKDT     17.33 feet High Tide
Sun -- 03:41 AM AKDT     Moonset
Sun -- 04:46 AM AKDT     Sunrise
Sun -- 06:57 AM AKDT     0.17 feet Low Tide
Sun -- 01:12 PM AKDT     15.17 feet High Tide
Sun -- 06:53 PM AKDT     3.63 feet Low Tide
Sun -- 07:39 PM AKDT     Moonrise
Sun -- 11:29 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
17.316.814.711.47.43.610.21.23.87.511.213.915.114.712.89.86.64.33.64.87.41114.5

Tide / Current Tables for Halibut Cove, Kachemak Bay, Cook Inlet, Alaska
   EDIT      (on/off)   Help   One Week of Data
Halibut Cove
Click for Map
Sun -- 12:16 AM AKDT     17.83 feet High Tide
Sun -- 03:40 AM AKDT     Moonset
Sun -- 04:46 AM AKDT     Sunrise
Sun -- 06:53 AM AKDT     0.27 feet Low Tide
Sun -- 01:19 PM AKDT     15.67 feet High Tide
Sun -- 06:49 PM AKDT     3.73 feet Low Tide
Sun -- 07:38 PM AKDT     Moonrise
Sun -- 11:28 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
17.817.415.311.97.73.710.31.44.17.711.414.215.615.313.410.26.84.43.857.611.214.7

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES Local Image of Alaska    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
Ground Weather Radar Station Kenai, AK
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
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 numerious 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.