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 7:24AM||Sunset 4:54PM||Sunday December 15, 2019 2:08 PM MST (21:08 UTC)||Moonrise 8:46PM||Moonset 10:38AM||Illumination 83%|
7 Day Forecast for Marine Location Near Moab, UTHourly EDIT Help
Area Discussion for - Salt Lake City, UT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KSLC 151741 AFDSLC
Area Forecast Discussion National Weather Service Salt Lake City UT 1041 AM MST Sun Dec 15 2019
SYNOPSIS. A storm system will continue to bring largely snow to the UT/AZ border region into the afternoon prior to shifting east of the area. Another weak weather system will bring some lake effect snow showers to the Salt Lake Valley late tonight through Monday morning with minor snow accumulations possible. High pressure will build across the region for the first half of the work week.
DISCUSSION. Noting an H7 circulation spinning up over far southern Utah in the vicinity of Bryce Canyon as a cold upper trough continues to translate east across a stalled boundary over the UT/AZ region. Widespread precip (mostly snow) has been the norm with this across far southern Utah over the last several hours with accumulating snow in Zion National Park and much of the Grand Staircase region, with even a few flakes falling in St George over the last few hours. Maintaining the advisory in place for this through midday, as several area roads have been impacted (outside of Dixie proper).
A well defined back edge of this precip is seen in both satellite and KICX attm, just east of the I-15 corridor in Dixie and progressing east at a more rapid clip due to the aforementioned H7 spin up. Although moderate to even locally heavy snow continues across the Grand Staircase currently, do expect a fairly rapid decreasing trend in both intensity and areal coverage after midday as the circulation shifts east while bringing the most focused forcing with it. A drier and more subsident northwest flow will spread across the region in wake. Latest update focused on this southern region, with refined snow potential and amounts into this afternoon.
PREVIOUS DISCUSSION. Otherwise, mean troughing will remain in place across the intermountain west tonight, while a trailing weak shortwave embedded in the northwest flow will cross northern Utah late tonight through Monday morning. Forecast models agree on increasing low- level moisture ahead of this wave, which when combined with the weak synoptic ascent ahead of the wave and cold temperatures in place over the Great Salt Lake should result in the development of some lake effect snow showers. BUFKIT profiles from the GFS/NAM agree on the overall low-level moisture and low- level thermal profiles conducive for lake effect convection to develop. However, relatively light boundary layer winds with some osculation in direction between 290-315 degrees will likely preclude the development of an organized lake plume as some overzealous high resolution model suggest. Instead expect more disorganized lake effect snow showers to spread some light snow accumulations across portions of the Salt Lake Valley. Generally expect accumulations will be in the dusting to 2 inch range, with locally higher amounts possible. The light flow will also likely preclude much lake effect/enhancement of snow into the Cottonwood Canyons, with most snow accumulation likely limited to locations closer to the lake. Any snow showers will quickly diminish by late morning in the wake of the shortwave passage.
Ridging will quickly build across the forecast area for late Monday through early Wednesday. Inverted conditions will return for the northern Utah valleys, with cool air remaining trapped in the wake of the departing storm systems. However, by Wednesday a decaying, moisture-starved Pacific trough will crash the ridge, but more on that below .
A weakening shortwave trough translating through a mean mid level ridge will traverse the forecast area late Wednesday into Thursday. This wave will remain moisture starved, however cooling aloft will weaken if not dislodge valley inversions across northern/western Utah. Otherwise a mean mid level ridge will remain in place through the long term period. As such have continued to lean on a blend of model guidance with respect to temperatures and PoPs.
AVIATION. VFR conditions are expected to persist over the SLC terminal through ~03Z with CIGs dropping to ~6000ft AGL thereafter. There is a 30% chance that snow showers will affect the airfield after 03Z, bringing periodic IFR conditions within localized snow showers and a potential for T-2 inches of accumulating snow. Otherwise, expect light northwest winds to persist over the airfield, becoming variable at times after 03Z.
SLC WATCHES/WARNINGS/ADVISORIES. UT . Winter Weather Advisory until 11 AM MST this morning for UTZ020.
WY . None.
DISCUSSION/AVIATION . Merrill/Webber PREVIOUS DISCUSSION . Church/Seaman
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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|Moab, Canyonlands Field, UT||22 mi||16 min||WNW 6||10.00 mi||Fair||35°F||17°F||48%||1010.2 hPa|
Link to 5 minute data for KCNY
Wind History from CNY (wind in knots)
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|2 days ago||NW||N||NW||NW||Calm||Calm||Calm||Calm||Calm||Calm||SW||Calm||Calm||W||NW||NW||NW||Calm||Calm||Calm||SE||SE||SE||SE |
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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 (16,3,4,5)(on/off)  Help
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