Marine Weather and Tides
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 7:36AM||Sunset 5:01PM||Sunday December 8, 2019 12:27 AM MST (07:27 UTC)||Moonrise 3:08PM||Moonset 3:47AM||Illumination 86%|
7 Day Forecast for Marine Location Near Samak, UTHourly EDIT Help
Area Discussion for - Salt Lake City, UT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
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.
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
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Link to 5 minute data for K36U
Wind History from 36U (wind in knots)
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|2 days ago||E||E||SE||E||NE||E||Calm||N||N|
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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.
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Wind Forecast for Salt Lake City, UT (2,6,7,8)(on/off)  Help
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