Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Springdale, 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 7:22AMSunset 7:55PM Tuesday March 28, 2017 7:48 AM MDT (13:48 UTC) Moonrise 6:58AMMoonset 7:47PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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 Springdale, UT
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location: 37.24, -112.98     debug


Area Discussion for - Salt Lake City, UT
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Fxus65 kslc 281045
afdslc
area forecast discussion
national weather service salt lake city ut
445 am mdt Tue mar 28 2017

Synopsis A ridge builds in mid week with the next storm expected
late Thursday into Saturday.

Short term (through 00z Friday)
Closed low feature is seen propagating southeast across arizona,
with the trough axis passing overhead. Flow veered quite northerly
which shut off snow prospects for the wasatch early. Other
mountain ranges will likely see a little additional accumulation
though it appears to not be as high of an impact. Therefore, have
cancelled all going winter weather advisories.

Remaining snow showers in the mountains will dissipate today as
flow aloft becomes more anticyclonic, height rises occur and
warming occurring aloft.

With 40kt of nne flow at 700mb, decent cold advection and a
northwesterly pressure gradient, wind advisory across outlying
dixie (not st. George) looks good. Many of the high resolution
models have solid advisory gusts through the morning. Will also
have to keep an eye on fremont junction.

After a warming trend thanks to a building ridge, the next storm
system develops a deep closed low over nevada Thursday. Closed
lows are quite finicky to forecast for as a slight deviation of
track or intensity can shift the precipitation and wind shield to
a different part of the region. Global models tend to have a hard
time with these systems as well.

Good height falls begin Thursday with increasing clouds. Expecting
gusty south winds ahead of the cyclone with modestly strong
pressure gradient and pressure falls. Lowered pops from south lake
southward during the day with south flow in place, but did raise
pops slightly across the far north.

Long term (after 00z Friday)
The next pacific trough in the series will continue to remain an
open wave across the northern great basin into Thursday night
prior to closing off over southern nevada by Friday morning.

Upstream amplification of the ridge off the pacific coast will aid
this process.

Trends as of late in medium range guidance point towards a rapid
transition to a closed low over southern nevada/sw utah, and quite
energetic as it does so. Although ivt is not all that impressive,
pwat remains a bit elevated for a trough this time of year (pushing

50 inches) with trough evolution, upper diffluence originally
oriented over central/northern utah late Thursday will transition
towards a focused moisture axis on the northwest/west periphery of
the low once again as it closes (Thursday night), though this time a
bit further west over western utah vs. The last few. Trends in
medium range guidance point this way, and confidence is rather high
on this outcome due to the upstream ridge amplification. This said,
have lowered pops along the wasatch front and upped them along the
ut/nv border and the SW where the thermal gradient looks to remain
most focused into and through Friday.

Regarding p-type, beneath the cold core of the trough over SW utah,
do expect a transition from rain to snow across the southwestern
valleys Friday. Further north, a sharp gradient in h7 temps trends
towards valley rain north of utah county and becoming more showery
with latitude. Will continue to have to monitor the potential of
more of an easterly wind concern for the northern wasatch front
Friday night than that of precip. These details will continue to
fall out as model to model consistency locks in.

A rather progressive downstream translation does look to limit both
length of precip, and the window of wind threats Friday night into
Saturday. Still, will have to monitor potential for enhanced
easterlies continuing in the north, and gap winds in the washington
county area into Saturday morning.

Globals do diverge on downstream evolution of this low slightly, and
thus wave amplification/track of the next pacific trough of the
train thereafter into the weekend. Have low confidence in this
evolution, and have largely trended grids towards or slightly below
climo.

Aviation
Northerly winds will remain in place at the kslc terminal through
today. Mid level CIGS are expected to thin mid to late morning
maintainingVFR conditions. In large, operational weather concerns
will remain minimal at the kslc terminal through the valid taf
period.

Slc watches/warnings/advisories
Ut... Wind advisory until noon mdt today for utz019.

Wy... None.

Short term... Rogowski
long term/aviation... Merrill
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
St George Municipal Airport, UT31 mi53 minSE 910.00 miFair46°F30°F56%1014 hPa

Wind History from SGU (wind in knots)
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Last 24hrCalmSE333SW6W15
G19
W20
G28
NW15
G25
--NW13
G18
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G24
E6E5SW11E7W8W4S10S6S83SW4SW8SE9
1 day agoCalmSE3CalmN3CalmCalmN353W9W5W8W6SW4CalmS3CalmE6E8SE7E5--S3NE3
2 days agoCalmCalmNW5N3NE7NE9N9N7NW7NW10NW7W7NW6W5N6S3SE6SE6CalmE5SE5S4CalmS5

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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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Salt Lake City, UT (9,2,3,4)
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Ground Weather Radar Station Cedar City, UT
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weather_mapweather_map weather_map

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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.