Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Platinum, AK

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:02AMSunset 11:09PM Thursday July 20, 2017 2:39 PM AKDT (22:39 UTC) Moonrise 1:50AMMoonset 7:02PM Illumination 8% Phase: Waning Crescent; Moon at 27 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
7 Day Forecast for Marine Location Near Platinum, AK
   Hourly   EDIT   Help
location: 59.05, -161.82     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxak69 pafg 202110
afdafg
northern alaska forecast discussion
national weather service fairbanks ak
110 pm akdt Thu jul 20 2017

Discussion
Progressive weather pattern over northern alaska through the
weekend and early next week. An upper level ridge over southwest
alaska combined with a strong upper level low over the beaufort
sea will provide strong westerly flow aloft with a series of
shortwave troughs and accompanying surface features over the north
slope and brooks range through early next week. A more moist and
cooler weather pattern is on tap for the west coast, western
interior as well as the central and eastern interior.

Aloft at 500 hpa, an east to west oriented ridge over southern
alaska combined with a series of strong short wave troughs moving
from west to east over the brooks range will bring ample moisture
over the north slope, especially over the eastern north slope and
eastern brooks range where a special weather statement addressing
expected rises on river levels in these areas has been issued.

The ongoing rain event has already dropped between one quarter and
one half inch of rain with another one half to three quarters of
an inch expected through Friday evening. Westerly flow at the
surface and in the mid levels will bump up precip totals in the
northeastern brooks range with upslope enhancement. Another strong
shortwave with attending surface low and fronts will plow onto
the western north slope Sunday and will bring another significant
rain event over the western north slope Sunday morning and the
eastern north slope Sunday night and Monday. Will need to closely
monitor rivers especially on the eastern north slope and eastern
brooks range Sunday and Monday as ongoing significant rain event will
already have river levels in the area elevated. As a 995 mb
surface low near the gulf of anadyr moves north and east on Sunday
heavy rain is expected over the southwestern brooks range and
southern slopes of the seward peninsula ahead of a strong front
moving over western alaska. Wetting rains are expected over much
of the interior Sunday and Monday ahead of the front as the front
sweeps inland over the western interior Sunday night and Monday
and over the central and eastern interior Monday.

The thermal trough currently along a bettles to fort yukon to old
crow line will be the focus this evening for scattered rain
showers and isolated thunderstorms. The thermal trough will move
south to be along a fairbanks to eagle to mayo line Friday
afternoon and evening and along a bettles to northway line
Saturday as a trough extending southward from a low over the
beaufort seas sweeps south and east over the the brooks range to
near bettles. Minimum relative humidity levels are expected to be
above 30 percent in all areas of northern alaska with the
exception of fort yukon to central to eagle line and points east
this evening. Minimum relative humidity levels are expected to
drop to around 30 percent this evening and to around 35 percent
Friday afternoon and evening. Winds in these areas are expected to
remain below red flag criteria.

The 12z model suite initialized well against the 12 surface
analysis and verified well against the 18z surface analysis,
however model spread on feature position and strength increase
rapidly in the short range as the models continue to struggle
with the track and intensity of a low expected to be located 250
nm north of wrangel island Friday afternoon. Both the NAM and the
ecmwf have the low 250 nm north of wrangel island as a 992 mb low
Friday afternoon however the GFS has the low located 150 nm
northeast of wrangel island as a 999 mb low. The GFS takes the low
on a much further south trajectory that would bring stronger west
to northwest winds along the eastern north slope coast Saturday
as compared to a more northerly track as given by both the NAM and
ecmwf. The GFS is also forecasting a 995 mb low to develop over
the gulf of anadyr that tracks east northeast over the bering
strait Monday while other models forecast a much weaker low over
the chukotsk peninsula. These significant strength and track
differences between model families and from run to run for only a
couple days out strongly erode model confidence in the mid and
long range.

Coastal hazard potential days 3 and 4...

models continue to indicate strong westerly winds in the vicinity
of barrow Saturday and along the eastern north slope Saturday
afternoon and into Sunday. Surf models continue to indicate
elevated water levels north of wainwright to barrow in the 1 to 2
foot range beginning Sunday morning and along the eastern north
slope with momentum transport onto shore Sunday night into Monday.

Continue to monitor.

Fire weather
The thermal trough currently along a bettles to fort yukon to old
crow line will be the focus this evening for scattered rain
showers and isolated thunderstorms. The thermal trough will move
south to be along a fairbanks to eagle to mayo line Friday
afternoon and evening and along a bettles to northway line
Saturday as a trough extending southward from a low over the
beaufort seas sweeps south and east over the the brooks range to
near bettles. Minimum relative humidity levels are expected to be
above 30 percent in all areas of northern alaska with the
exception of fort yukon to central to eagle line and points east
this evening. Minimum relative humidity levels are expected to
drop to around 30 percent this evening and to around 35 percent
Friday afternoon and evening. Winds are forecast to remain just
below red flag criteria in these areas. Temperatures are expected
to rise into the lower 70s. Fire weather concerns will diminish as
a more moist and cooler airmass moves over central and eastern
interior Friday and through the weekend.

Hydrology
Significant rainfall continues along the eastern north slope and
eastern brooks range with 24 hour totals in the one quarter to
one half inch range. Moisture ahead of a front currently along a
prudhoe bay to anaktuvuk pass line will continue to slowly move to
the east. West to northwest flow in the low and mid levels will
enhance rain fall totals in the eastern brooks range where an
additional one half to three quarters of an inch of rain is
expected though Friday evening. A special weather statement for
rises on rivers draining the eastern north slope and northeastern
brooks range has been issued. Another round of rain possibly heavy
will move into the eastern north slope and eastern brooks range
Sunday as another shortwave moves over the area. Continue to
monitor for rises on rivers.

Afg watches warnings advisories
Small craft advisory for pkz220-pkz225-pkz230-pkz245.

Ccc jul 17


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from AEH (wind in knots)
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
9
AM
10
AM
11
AM
Last 24hrS6
G20
S17
G22
CalmSE8
G21
------------------------------------CalmSE23
G27
1 day ago------W15
G19
----CalmCalmCalmSW15
G19
SW13SW15
G21
CalmSW14
G17
CalmCalmS19Calm--------CalmS17
2 days agoS14
G27
SW10
G22
CalmCalm--SW10
G16
SW13
G20
SW14
G17
W14
G22
CalmCalmCalmW20W19W20
G24
W14
G19
Calm--------------

Tide / Current Tables for Goodnews Bay entrance, Alaska
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Goodnews Bay entrance
Click for Map
Thu -- 02:19 AM AKDT     1.34 feet Low Tide
Thu -- 03:50 AM AKDT     Moonrise
Thu -- 06:09 AM AKDT     Sunrise
Thu -- 08:12 AM AKDT     6.92 feet High Tide
Thu -- 02:32 PM AKDT     -0.82 feet Low Tide
Thu -- 09:01 PM AKDT     Moonset
Thu -- 09:44 PM AKDT     7.95 feet High Tide
Thu -- 11:35 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.72.21.41.52.53.95.36.46.96.65.53.820.4-0.7-0.70.11.73.65.46.97.87.97.1

Tide / Current Tables for Carter Spit, Alaska
   EDIT      (on/off)   Help   One Week of Data
Carter Spit
Click for Map
Thu -- 12:52 AM AKDT     1.59 feet Low Tide
Thu -- 03:49 AM AKDT     Moonrise
Thu -- 06:08 AM AKDT     Sunrise
Thu -- 06:32 AM AKDT     8.98 feet High Tide
Thu -- 01:05 PM AKDT     -0.94 feet Low Tide
Thu -- 08:04 PM AKDT     10.29 feet High Tide
Thu -- 09:03 PM AKDT     Moonset
Thu -- 11:38 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.11.62.446.17.88.88.97.963.71.5-0.2-0.9-0.41.23.66.18.29.710.39.78.15.9

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
npac_satellite

GOES Local Image of Alaska    EDIT
Geos

Ground Weather Radar Station Bethel, 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.