Sunday, December8, 2019
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Marine Weather and Tides
Samak, UT

Version 3.4 		NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
Sunrise 7:36AMSunset 5:01PM Sunday December 8, 2019 12:27 AM MST (07:27 UTC) Moonrise 3:08PMMoonset 3:47AM 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
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7 Day Forecast for Marine Location Near Samak, UT
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location: 40.62, -111     debug

Area Discussion for - Salt Lake City, UT
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FXUS65 KSLC 080417 AFDSLC

Area Forecast Discussion National Weather Service Salt Lake City UT 917 PM MST Sat Dec 7 2019

SYNOPSIS. The next Pacific storm system will reach the western Great Basin early Sunday, then move east through Utah Sunday night. High pressure aloft will return to the region early in the upcoming week.

SHORT TERM (Through 00Z Wednesday). The shortwave moving southeast through western Canada will phase with the decaying upper low off the Oregon/northern California coast later tonight. The resultant positive-tilt trough will move east into the northern Rockies/western Great Basin early Sunday, then continue east-southeast into and then through Utah Sunday night.

For the overnight period a shallow area of weak warm advection underneath somewhat cooler mid-level air generated some very light precip near the Idaho border early this evening. This weak lift/light precip was sufficient to eliminate much of the dense fog that formed in the Cache valley earlier this evening. Further south, the lingering fog from late this afternoon in the Salt Lake/Tooele valleys has expanded and become dense once again near the GSL. This fog has been working north toward the Ogden area this evening, but is expected to see little additional advance, or even retreat a bit later tonight ahead of the approaching trough.

Heading into Sunday morning low-level cold advection will set up across the north which will help stir out a good bit of the fog/low clouds and mix out some the residual cold air still trapped in a few of the northern valleys. The arrival of cooler mid-level along with increasing dynamic support from the advancing upper trough should expand precip across the north mid to late morning, then south across western/central Utah by the afternoon. Precipitation will likely focus along and ahead of the trough axis as it passes through Sunday night.

Dynamic subsidence and a drier airmass trailing the upper trough will bring a downward trend to precip late Sunday night/Monday morning. The Wasatch range may still see lingering accumulating snows into Monday morning as a moist low-level airmass and cold cyclonic northwest flow persists into Monday morning.

Building heights Monday afternoon through Tuesday ahead of an advancing upper ridge will bring dry conditions to the area along with strengthening valley inversions.

LONG TERM (After 00Z Wednesday). A shortwave trough is still progged to undercut the strong ridge over the West Coast and track across the Great Basin as a splitting feature. The GFS and GEFS mean 500mb heights remain lower over Utah than the EC and EPS mean, and 700mb temperatures are colder as well. The deterministic GFS is also less split than the EC, taking the vort max associated with the southern split across Utah rather than just to the south. Although have left mentionable weather out of the forecast for this storm for now, the chance that the GFS solution with its slightly better dynamics and stronger cold advection could bring some very light precipitation to the area.

A near zonal or slight northwesterly flow aloft will settle into the area Thursday through the end of the week. Weak ripples embedded in the flow grazing northern Utah are expected to bring some precipitation to northern Utah during this time. Precipitation may begin as snow or a wintry mix with the initial round or precipitation, but the unsettled weather, increased flow, and nighttime cloud cover may work together to gradually weaken valley inversions over time.

A shortwave trough is then progged to approach the area at the end of the forecast period, pushing a cold front through the area.

AVIATION. LIFR to IFR conditions are expected to continue at the SLC terminal through at least late this evening, then gradually improve late tonight as the next storm system works its way into the area. There may be a return to MVFR or VFR conditions after 07-08z, but more likely this will not occur until after 10-12z as rain or a rain/snow mix begins to develop. Light southerly winds are expected to gradually increase overnight, then switch to northwesterly tomorrow afternoon.

SLC WATCHES/WARNINGS/ADVISORIES. UT . Winter Weather Advisory from midnight tonight to 10 AM MST Monday for UTZ007>010-517.

Winter Weather Advisory from 5 AM Sunday to midnight MST Sunday night for UTZ518.

WY . None.

CONGER/CHENG

For more information from NOAA's National Weather Service visit . http://weather.gov/saltlakecity

For frequently asked questions about the Area Forecast Discussion visit . http://weather.gov/saltlakecity/general/afd_faqs.php

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for K36U

Wind History from 36U (wind in knots)
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Last 24hrCalmSE6E3N5E3W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS7S11
G18		SW10
G15		SW13
G18		SW16
G24		SW15
G22		SW13S4
1 day agoSW6CalmE5E4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4SW4W4SW10SW9SW9
2 days agoE5E4SE5E4NE8E8CalmN9N9
G17		E5E4N9
G14		N14N7E5N9N13N10
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G15		N4N5
G15		N7N8SW11
G16
Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 Salt Lake City, UT (2,6,7,8)
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Ground Weather Radar Station Salt Lake City, UT
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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.