Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 7:18AM||Sunset 7:36PM||Sunday September 19, 2021 8:41 AM MDT (14:41 UTC)||Moonrise 6:23PM||Moonset 4:44AM||Illumination 96%|
7 Day Forecast for Marine Location Near Springdale, UTHourly EDIT Help
Area Discussion for - Salt Lake City, UT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KSLC 191044 AFDSLC
Area Forecast Discussion National Weather Service Salt Lake City UT 444 AM MDT Sun Sep 19 2021
SYNOPSIS. A stout cold front will push into Utah and southwest Wyoming through the afternoon hours today, bringing strong northerly winds across the northern half of Utah. Light showers developing along the front will quickly come to an end as high pressure begins building in the wake of the frontal boundary overnight into Monday. Largely dry conditions are then expected to prevail through the remainder of the week ahead.
SHORT TERM (Through 12Z/6AM Wednesday). A stout upper trough currently noted on satellite analysis begins to push onshore this morning, with areas along the Pacific NW region having observed substantial precipitation. This trough will continue to move inland and track over mainly the northern half of the forecast area over the next 24 hours. While upstream observations have recorded widespread precipitation, much of the available moisture will have been depleted by the time the broad forcing arrives at our doorstep. Forecast remains on track with most areas across northern Utah remaining dry. Isolated to scattered light showers will develop along the H7 frontal boundary across far northern Utah, mainly along the Utah/ Idaho border region and northern Wasatch. Little to no accumulations of rain or snow is anticipated with these showers.
The main focus of the passing of the frontal boundary will be the associated strong winds, namely later in the afternoon hours. Current guidance shows the surface boundary pushing through the northern half of the area during the mid-morning hours, with a tightening pressure gradient as the mid and upper support begin to catch up with the surface boundary. With this in mind, winds at the surface will ramp up substantially as the H7 front begins to charge through and the surface gradient continues to tighten. Widespread winds of 15-20 mph are expected, with gusts generally around 30 to 40 mph. The one area of note with the winds will be on the lee side of the Traverse/ Oquirrh mountains, as well as along Utah Lake. Localized downsloping and gap winds aided by the progression of the cold front will likely create wind gusts up to 45 mph, primarily for areas north of Provo. With this in mind, a Wind Advisory will go into effect for Utah County during the mid- afternoon hours, with a focus on Utah Lake as well as areas adjacent to the Traverse Mountains.
The axis of the aforementioned trough will progress over the area through the late evening and overnight hours into Monday, allowing for high pressure to begin filling in its wake. With the colder airmass lingering over Utah and southwest Wyoming, alongside quickly clearing skies, a substantial drop in temperature is expected overnight across the region. Northern Utah mountain valleys and Uinta County, Wyoming will likely see temperatures drop into the low 30s, creating widespread frost and a quick glimpse of winter-like temperatures.
Dry conditions prevail through Monday as high pressure continues to build into the region. Another night of light winds, a colder airmass lingering overhead, and strong radiative cooling will allow for further decreasing overnight low temperatures. As such, the coldest temperatures of the short term forecast period are anticipated by Tuesday morning. Most mountain valley areas from about Sanpete County northward will likely experience hard freeze conditions, therefore, a Hard Freeze Watch has been issued for the Sanpete Valley, Cache Valley, and Wasatch Back. Along the Wasatch Front, overnight low temperatures will generally drop into the upper 30s to low 40s by Tuesday morning.
LONG TERM (After 12Z/6AM Wednesday). Model consensus retains a near overhead ridge position Wednesday in advance of a splitting trough approaching from the west. Bulk of global guidance outside of the deterministic GFS maintains a hard split of the trough well upstream with the southern lobe tracking into the western Great Basin prior to retrograding off the Cali coast, this retaining mean ridging locally. The outlier splits this lobe from the parent trough a bit further inland with remnants shearing overhead and through the mean ridge on Thursday. Even this outlier doesn't look to change sensible weather conditions all that much however (outside of a slight chance of a few degrees of cooling in the north), with bottom line pointing towards a warming trend back to near seasonal norms and maintenance of dry/stable conditions areawide.
AVIATION. KSLC . Gusty southerly winds are expected through 16-17z with periodic gusts in excess of 30mph expected. After 17z a dry cold front is expected to switch the winds to the northwest with increasingly gusty NW-N winds through the early evening hours. Northwesterly winds are expected to persist through Sunday night, though speeds will be decreasing sharply after 02/03z. VFR conditions are expected to be maintained through the valid TAF period.
REST OF UTAH AND SOUTHWEST WYOMING . Increasingly gusty southerly winds are expected for all areas this morning in advance of a largely dry cold front which will track NW-SE across the area beginning late morning. Southerly wind gusts up to 40mph are possible across the southern half of the state midday through late afternoon, while the northern half of state will see increasingly gusty northwesterly winds (up to 30-40mph) developing behind the front. Through 15-16z LIFR conditions remain possible at KBCE prior to patchy fog burning off, but in large VFR conditions are expected to be maintained.
FIRE WEATHER. A deep upper trough will push into the Great Basin region through the late morning and afternoon hours today, bringing with it a strong cold front that will charge across Utah and southwest Wyoming. As the front progresses across the region, strong winds will exist along, and right behind, the frontal boundary. While wind gusts to 25-40 mph are expected, RH values will remain well above critical thresholds, creating less extreme fire weather conditions. That being said, little change is anticipated in minimum RH values as temperatures drop. Isolated critical fire weather conditions may be possible across portions of west-central Utah this afternoon, though the overwhelming majority of Utah and southwest Wyoming will not experience critical fire weather conditions.
The passage of the frontal boundary will remain largely dry. An area of light showers are expected along the Utah/Idaho border region, as well as across the high Uintas. Additional isolated showers, mainly north of I-80 and east of I-15, will be possible during the afternoon hours with little accumulation expected. Otherwise, cooler temperatures across the region will begin to rise after Tuesday, becoming near normal with dry conditions prevailing.
SLC WATCHES/WARNINGS/ADVISORIES. UT . Wind Advisory from 2 PM this afternoon to 8 PM MDT this evening for UTZ106.
Hard Freeze Watch from late Monday night through Tuesday morning for UTZ107-108-118.
WY . None.
SHORT TERM . Webber LONG TERM . Merrill AVIATION . Merrill FIRE WEATHER . Webber
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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|St George Municipal Airport, UT||31 mi||46 min||SW 3||10.00 mi||Fair||63°F||56°F||78%||1012.9 hPa|
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Wind History from SGU (wind in knots)
|1 day ago||Calm||SW||N||W||W||W|
|2 days ago||SW||Calm||Calm||NW||W||W|
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