Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Kanab, UT

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:14AMSunset 6:17PM Wednesday February 20, 2019 8:14 AM MST (15:14 UTC) Moonrise 7:46PMMoonset 8:08AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 Kanab, UT
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location: 37.11, -112.22     debug


Area Discussion for - Salt Lake City, UT
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Fxus65 kslc 201248
afdslc
area forecast discussion
national weather service salt lake city ut
547 am mst Wed feb 20 2019

Synopsis A potent winter storm will settle into the great basin
today, then remain over the region through late in the week.

Heavy snow associated with this storm will concentrate mainly across
the southern two-thirds of utah late today through early Friday.

Short term (through 00z Sunday) The large-scale pattern this
morning consists of a weak shortwave ridge over utah while upstream,
a trough centered over the pacnw is tracking sse. Ahead of said
trough, moisture has increased over northern utah as warm advection
strengthened over the area. This has resulted in an area of snow
across northern utah. At the surface, pressure falls over idaho and
nevada has led to a tightening southeasterly pressure gradient
across northwest through west-central utah. As such, enhanced
south southeast winds are noted across northwest utah.

Accumulating snow across northern utah is expected to continue
impacting area roadways through the morning commute, and as such,
winter weather advisories remain in place for the northern wasatch
front and cache valley and adjacent mountains, as well as the
northwest deserts (areas favored in southwest flow). New with the
morning package was the addition of the ogden valley where
favorable southwest flow should allow that area to also do well in
terms of accumulation. Snow across northern utah should decrease
this afternoon as the warm advection weakens and the upstream trough
dives south.

The trough is progged to end up closing off over nevada tonight.

Snow is expected to begin developing across southern utah this
afternoon as an embedded vort MAX dives into southern nevada and
towards southwest utah while warm advection strengthens in
southwesterly flow aloft. The upper low will remain over nevada into
tomorrow before filling and tracking east on Friday. Until that
time, a moist upslope south to southeast flow will persist for an
extended period of time as a 700mb circulation tracks slowly east
along the utah arizona border. As a result, expect significant
accumulations across southern through east-central utah. Even utah's
dixie is expected to see significant (for that area) accumulations.

Winter weather warnings and advisories are in place for the most
impacted areas. Additional areas may eventually need to be added
later depending on how the storm evolves. For example, the western
uinta basin could potentially see significant accumulations tomorrow
afternoon night as moisture wraps around the low in an easterly
upslope flow. West-central utah may also see significant
accumulations particularly along the i-15 corridor late tomorrow
afternoon into Friday with the northerly flow on the backside of the
trough as it starts to exit east. Otherwise, most of the wasatch
front area is expected to see little in the way of snow tonight
through the duration of the storm due to an easterly downslope flow
tonight through tomorrow night.

Besides the snow, another thing to watch will be canyon winds along
the wasatch front due to said easterly flow. An easterly pressure
gradient will set up across the wasatch tonight. However, with weak
flow aloft, these winds will likely remain localized to the canyons
with gusts in the 30-40mph range. The gradient is progged to remain
more or less in place through tomorrow night. However, the latest
models are now indicating stronger 700mb flow (20-30kt) tomorrow
through tomorrow night with cold advection (though not particularly
strong) across the terrain. If this trend continues, there will be
some potential for stronger and more widespread downslope winds.

The storm will finally exit the area by Friday evening. After that,
the pattern will start to trend more zonal for the weekend. On
Saturday, warm advection across northern utah ahead of a weak, low-
amplitude trough passing by to the north could allow some snow to
develop near the idaho border.

Long term (after 00z Sunday) An active pattern will continue with
a couple of systems impacting the forecast area through the middle
of next week.

Global models are in general agreement with a broad trough of low
pressure from the pacific northwest through the northern rockies
early in the period, reinforcing cold air over the region. A
glancing upper level disturbance rotating through the base of the
trough could produce some light snow activity over the northern
portions of the forecast area Saturday night and Sunday. The primary
change to this forecast period was to scale back on precipitation
potential for central utah, as bulk of upper level support remains
to the north of the forecast area.

Global models all indicate a strong shortwave will swing through the
northern great basin Sunday night and Monday, though with some
differences. In general, the GFS indicates a compromise between
more shallow solution of ECMWF and deeper canadian solution.

Experimental fv3 GFS favors the canadian solution. With ample
moisture and strong upward lift generated by shortwave and
significant jet energy, boosted chances for precipitation.

Global models all indicate some mid level ridging for Tuesday and
Wednesday, with significant warming of temperatures aloft. Models,
in particular gfs, may be a bit aggressive in generating qpf, though
will hold on to chance wording for northern portions of forecast
area, with precipitation type in valleys looking to be a mix of rain
and snow.

Aviation With winds backing to the southwest, snow showers will
remain well north of kslc early in the TAF period, withVFR
conditions prevailing, with ceilings at or above 6,000 feet agl.

Still expect light snow to develop mid to late morning, then
continue into the afternoon, with MVFR ceilings and visibilities.

Southerly winds will prevail into tonight.

Slc watches warnings advisories
Ut... Winter storm warning from noon today to 4 pm mst Friday for
utz518.

Winter storm warning from 5 pm this afternoon to 9 am mst Friday
for utz012-013-016-019>021.

Winter weather advisory until noon mst today for utz001-002-
005>007.

Winter weather advisory from noon today to 9 am mst Friday for
utz014.

Winter weather advisory from noon today to 4 pm mst Friday for
utz010-517.

Wy... None.

Cheng barjenbruch
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


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Page, Page Municipal Airport, AZ42 mi22 minSE 510.00 miA Few Clouds22°F12°F66%1012.7 hPa

Wind History from PGA (wind in knots)
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Last 24hrNW3NW4NW44N34SW9
G16
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W7W5NW6NW4NW3NW3SE3SE4SE6SE8SE7SE5
1 day ago4W4W7W9S53CalmSW5CalmCalmCalmCalmCalmW3CalmNW4NW5W3W3W3NW4W4CalmW3
2 days agoNW4NW4N6N7--S5SE7W7W6SW6
G14
W5NW9W3CalmCalmCalmCalmNW6NW4CalmSE3E3CalmN3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of    EDIT
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Salt Lake City, UT (10,2,3,4)
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Ground Weather Radar Station Cedar City, UT
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Disclaimer:
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 L-36.com. 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 L-36.com 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.