Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Salt Lake City, UT

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:12AMSunset 8:55PM Thursday July 20, 2017 4:41 PM MDT (22:41 UTC) Moonrise 2:31AMMoonset 5:19PM Illumination 8% Phase: Waning Crescent; Moon at 27 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Salt Lake City, UT
   Hourly   EDIT   Help
location: 40.78, -111.93     debug


Area Discussion for - Salt Lake City, UT
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus65 kslc 202203
afdslc
area forecast discussion
national weather service salt lake city ut
403 pm mdt Thu jul 20 2017

Synopsis Monsoon moisture will persist over most of utah
through today. Drier air will gradually spread back into the area
from the northwest Friday into Saturday. Moisture start to spread
back into utah Sunday night and Monday.

Short term (through 12z Sunday) Deep moisture remains over the
forecast area this afternoon, with satellite derived pws in the
1.0 to 1.2 inch range, near the maximum observed this time of
year. Despite ample moisture, instability is on the low side
without a well defined forcing mechanism, so afternoon convection
is primarily confined to the higher terrain so far. Still,
expecting coverage of convection to continue to increase into the
early evening, and with enhanced southerly flow, would think at
least some of the storms would come off the terrain. Given the
very moist airmass and the possibility of heavy rain with any
storms that develop, a flash flood watch continues through the
evening over central and southern utah. Under high pressure, maxes
are running near seasonal normals over northern utah and a little
below over southern utah.

The ridge over the area is expected to flatten by tomorrow as a
trough moves over the top of it, shifting the flow aloft to a more
westerly direction. This will allow a drying trend over the forecast
area, primarily over northern utah and southwest wyoming. Gfs
indicates pws over northern and central utah dropping to the 0.5 to
0.7 inch range by Saturday afternoon as pws in excess of 1.0 inch
persist over southern utah. As a result, coverage of convection will
decline significantly over primarily the northern half of the
forecast area while the threat of thunderstorms with heavy rain
continues for southern utah.

Long term (after 12z Sunday) The ridge over the region remains
centered to the west of ut at the start of the long term period
with the drier air that had spread into the CWA still in place
across the north and east. Deep moisture will remain pooled along
the az border extending northwest thru nv. Expect most convection
sun will remain limited to the south but isolated storms will be
possible up the mountain spine into the uintas, and northward
along the nv border.

The high is forecast to shift east thru Mon allowing the moisture
to our south and west to spread back into the CWA with a
corresponding increase in convection. The deepest surge looks to
arrive Tue altho guidance begins to diverge at this point. The gfs
has a short wave that moves into the northwest states and nrn
rockies on tue, then spreads drying over the north for Wed while
the ec keeps the deep moisture in place thru Wed and lifts the
wave weakly past on Wed night with only a little drying thu.

Raised pops to scattered for the entire CWA for Tue and kept a
mention area wide thru thu, but confidence in the forecast drops
off quickly after tue.

Aviation Southerly winds will prevail at the slc terminal
through the rest of today and this evening, gusty at times, but
there is a 20 percent chance of a shift to the northwest between
22z and 00z. There is a 30 percent chance that showers and
thunderstorms in the vicinity of the terminal will result in
periods of erratic winds between about 23-04z.

Fire weather Monsoonal moisture remains over the fire district
this afternoon on the back side of an upper ridge. Showers and wet
thunderstorms have developed, primarily over the higher terrain,
and will continue into the evening. Heavy rain will be the primary
threat with any thunderstorms. Given the deep moisture, relative
humidities will remain high and southerly flow will remain breezy.

Drier air will start to move into the district from the northwest
beginning tonight, and this drying trend will continue into the
weekend. The most noticeable drying will occur over northern utah,
with deeper moisture remaining pooled over southern utah through
the weekend. Moisture is expected to return to the district early
next week.

Slc watches warnings advisories
Ut... Flash flood watch until midnight mdt tonight for utz010-012>016-
019>021-517-518.

Wy... None.

Short term fire weather... Traphagan
long term aviation... Wilensky
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
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salt Lake City, Salt Lake City International Airport, UT2 mi48 minS 1210.00 miMostly Cloudy93°F54°F27%1009.3 hPa
Hill Air Force Base, UT24 mi1.7 hrsSSE 1310.00 miPartly Cloudy91°F54°F29%1011.3 hPa

Wind History from SLC (wind in knots)
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrS19
G33
S14
G20
S12S19
G25
S15
G22
SE10SE11S11S15SE12SE15SE14S10SE12SE16S16
G23
SE15SE15S14
G23
S21
G26
S21
G32
S17
G25
S14
G23
S12
1 day agoS5NE5N10N6N4E7S6SE4W10
G17
SE8SE17S6SE5SE6S15S16
G24
S19
G23
S12
G21
S17
G27
S18
G24
S13S12SW53
2 days ago6SE6SE9
G18
SE10SE8SE10S10E8S7SE5S4--S5SE6SE7S8SE10
G17
S10S8S12S11
G19
SW554

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralPlains    EDIT
Geos

Wind Forecast for Salt Lake City, UT (18,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Salt Lake City, UT
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.