Marine Weather and Tides
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 6:57AM||Sunset 6:21PM||Tuesday March 2, 2021 7:53 PM MST (02:53 UTC)||Moonrise 10:36PM||Moonset 9:07AM||Illumination 80%|
7 Day Forecast for Marine Location Near Salt Lake City, UTHourly EDIT Help
Area Discussion for - Salt Lake City, UT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KSLC 022226 AFDSLC
Area Forecast Discussion National Weather Service Salt Lake City UT 326 PM MST Tue Mar 2 2021
SYNOPSIS. High pressure will bring a warming trend while maintaining dry weather through Wednesday. The next storm system will impact Utah Wednesday night into Thursday. High pressure returns Friday before another storm system arrives for the weekend.
SHORT TERM (Through 12Z Friday). Mid level ridging remains situated across the forecast area this afternoon, downstream from an upper low spinning off the California coast near 130W. This has allowed temperatures to warm into the 50s today along the I-15 corridor from the Wasatch Front south to Cedar City, while St George has warmed into the 60s. Meanwhile cold air remains trapped in the Bear Lake/Bear River valley area, as well as the Cache valley where temperatures remain confined to the 30s and low 40s.
This ridge will slowly shift east overnight into the day Wednesday as the upstream low moves onshore. An increase in southerly flow should allow for deep mixing and a continued warming trend with max temps warming another 5-10 degrees across the western valleys, allowing the central and southern Wasatch Front to potentially reach the low 60s.
The aforementioned low is forecast to eject across central and southern Utah Wednesday night into early Thursday. Upper diffluence and low level warm air/moisture advection should allow for valley rain and mountain snow to develop across southern Utah Wednesday evening, then spread into central and portions of northern Utah mainly south of I-80 overnight Wednesday into early Thursday morning, along a mid level deformation axis associated with the ejecting low. Cooling aloft during this time should allow snow levels to fall into the 5500-6000 foot range by early Thursday morning. The models have trended faster lifting this wave east of the area by midday Thursday.
Overall it looks like 4-8 inches of accumulation is likely across the southern mountains, trending lower further north into central Utah, with 1-3 inches above roughly 7000 feet expected across the Wasatch and western Uinta ranges.
LONG TERM (After 12z Friday). A continuation of the warm, spring- like temperatures are expected Friday and Saturday. Heading into the latter part of the weekend and into next week, the pattern shifts back to a moderately active pattern with a few troughs progged to move across the Great Basin beginning on Sunday. This long term discussion will continue to talk about the warm temperatures and the potential for precipitation chances on Sunday and into next week.
CONTINUED WARM . In the wake of the exiting storm system, upper level ridging that as been building across the western CONUS, will begin to shift east into the Great Basin region by Friday. The bulk of the warmest H7 temperatures associated with this thermal ridge will remain confined across the desert southwest. A nose of this thermal ridge will begin to advect north in response to a deepening trough off the Oregon coast (more on that in the next section), that will strengthen and shift the flow to a more southwesterly component. With clearing skies and warming H7 temperatures, highs on Friday may approach 60F in the northern Utah valleys. Temperatures are expected to be warm again on Saturday, but depending on the arrival of the Pacific trough and the associated surface cold front, the high temperature may occur during the morning hours if the most aggressive model solutions pan out. Current forecast approach is taking into account that most model and ensemble members are in agreement of deepening the trough off the California coast which would suggest a slower moving system with slower trajectory to the east. This seems to be the most likely scenario which would have the trough and associated surface cold front coming through after peak heating as already been realized. Temperatures are forecast to eclipse 60F for all Utah valleys which would be 10-15 degrees above normal.
UNSETTLED WEATHER AND COOLER . As mentioned above, most models are in agreement in bringing in a weak trough through northern Utah Sunday night. This through compared to the one the models are advertising for next week will be very weak with little moisture to work with. Most of the measurable precipitation will be the light snow showers across the central and northern Utah mountains with some very light valley rain possible. Continuing on with the trend over the past month, ridging builds in immediately behind this trough and will bring a quiet and dry day on Monday. Beyond Monday, the H5 pattern becomes messy with wide ranges of model discrepancies emerging with this next storm system. Confidence is increasing for the unsettled weather to return by Tuesday and PoP chances have been increased slightly, but confidence is low regarding the extent of the precipitation, timing and accumulation and these details will be the focus leading up to the event in future forecast packages.
AVIATION. VFR conditions will continue through the TAF period at KSLC through the TAF period with northwest winds switching back to the south around 03Z.
SLC WATCHES/WARNINGS/ADVISORIES. UT . None. 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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|Salt Lake City, Salt Lake City International Airport, UT||2 mi||59 min||W 6||8.00 mi||Mostly Cloudy||41°F||28°F||60%||1016.6 hPa|
|Hill Air Force Base, UT||24 mi||55 min||N 7||10.00 mi||Fair||43°F||22°F||43%||1016.5 hPa|
Link to 5 minute data for KSLC
Wind History from SLC (wind in knots)
|1 day ago||SW||SE||S||SE||SE||S||S||SE||SE||SE||SE||SE||SE||S||Calm||S||SE||W||N||N||N|
|2 days ago||E||SE||SW||W||Calm||S||W||S||SE||SE||SE||SE||SE||SE||W||NW||W||N||W|
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