Wednesday, March29, 2017

Marine Weather and Tides
Salt Lake City, UT

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:12AMSunset 7:51PM Wednesday March 29, 2017 9:12 AM MDT (15:12 UTC) Moonrise 7:30AMMoonset 8:56PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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 Salt Lake City, UT
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location: 40.78, -111.93     debug

Area Discussion for - Salt Lake City, UT
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Fxus65 kslc 290938
area forecast discussion
national weather service salt lake city ut
338 am mdt Wed mar 29 2017

Synopsis High pressure will build into the region today. The
high will give way to the next pacific storm system that crosses
the area late Thursday through Friday night. High pressure returns
for the weekend.

Short term (through 12z Saturday)
A ridge is building in aloft behind the last storm, as a series of
shortwaves ride across the northern pacific in what will become
our next storm.

Global models have been in good agreement for some time now that a
closed low would affect the region late in the week. However, the
storm track and where the deepening occurs has been waffling a
bit, and these factors are a big deal in precipitation and wind

Models have trended a little faster with a little later deepening,
bringing the cold front through the area late tomorrow and
tomorrow evening. Thus have sped up the initiation of pops to the
area in the grids along with increasing pops due to the latest
projection of the cold pool.

This storm has a nice height fall/rise couplet, moisture tap well
into the pacific and a colder airmass. Precipitation is first
supported tomorrow across the north with increasing divergence,
pva and as the exit region of a cyclonically curved jet arrives.

Gusty pre and post frontal winds are expected tomorrow afternoon
and evening, a little below advisory criteria. Post frontal winds
may be enhanced due to convection as the cold front crosses the

The storm then slows as it deepens later tomorrow night and Friday
across southwest utah. Two important things then occur. First,
warm advection wrap around occurs north of the cyclone potentially
impacting northern and wester utah. Also, northerly winds become
quite gusty across western utah as the jet at 700mb increases to
50kts with a tightening pressure gradient as a ridge begins to
nudge into the region. Not expecting strong easterly winds along
the wasatch, though they are forecast to increase. This is because
there is not really any 700mb cold advection from wyoming due to a
lack of cold airmass (and very high pressures) to our northeast.

We are just entering the watch period for this storm. However
decided not to issue any winter/wind watches due to the
sensitivity of these conditions to slight track differences. Also
later shifts will better be able to collaborate with our

Long term (after 12z Saturday)
Anticyclonic northerly flow translating overhead will aid to
rapidly squelch precip across the eastern third of the area
Saturday morning, this as the upper low discussed in the short
term continues a downstream track. Yet another break from the wave
train will occur thereafter through Sunday, but this break now
looks to be short lived.

Global models have actually trended similar regarding the track and
evolution of the next open wave poised to descend SE across the
northern/eastern great basin late Sunday night through Monday, prior
to this wave closing off near the ut/co border. Previous runs have
either amplified this wave west (gfs), or progressed it to the
northeast (ec). This said, the latest 00z solutions seem to be
coming towards a more common solution digging it southeast through
the area. This is quite similar to the long wave pattern evolution
as of late, thus feel quite confident in the big picture model
solutions attm.

Details will remain challenging with such a system, especially in
the long term, but what is becoming increasingly evident is the
breadth of CAA behind a cold front will be fairly significant (cold
enough for at least a mix of snow across the western valleys
Monday). Have trended pop grids away and above from climo, and
focused the best chances for widespread precip over the northern
half of the area. If models continue a similar run to run pattern,
will have to significantly up pops across the above mentioned areas
Monday into the overnight hours.

Thereafter guidance points towards low amplitude ridging building
across the area midweek. This said, the progressive eastern pacific
pattern will continue as another modest slug of moisture/short wave
energy punches into the norcal/pacnw Wednesday on.

Operational weather concerns will remain minimal at the
kslc terminal through the valid TAF period. Light and variable
trending light southeast surface winds will remain in place this
prior to becoming a prevailing northwest between 18-20z.

Slc watches/warnings/advisories
Ut... None.

Wy... None.

Short term... Rogowski
long term/aviation... Merrill
for more information from noaa's national weather service visit...

for frequently asked questions about the area forecast discussion


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salt Lake City, Salt Lake City International Airport, UT2 mi19 minSSE 710.00 miMostly Cloudy40°F30°F70%1023.7 hPa
Hill Air Force Base, UT24 mi75 minESE 1110.00 miFair35°F25°F67%1023.2 hPa

Wind History from SLC (wind in knots)
Last 24hrN12NW11NW6
1 day agoW9W10N5NE7SE4S5SW4W3N11N4N9N9N8N8N12N8N12N9NW9NW11NW11NW10NW12NW11
2 days agoSE7S7S5S3CalmE33CalmS6S8S6SE6SE8SE6SE5SE6SE8SE5E3E5SE14SE8S5S7

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of CentralPlains    EDIT

Wind Forecast for Salt Lake City, UT (11,2,3,4)
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Ground Weather Radar Station Salt Lake City, UT
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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 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 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.