Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Yankton, SD

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 7:30AMSunset 4:56PM Thursday November 23, 2017 8:53 AM CST (14:53 UTC) Moonrise 11:35AMMoonset 9:27PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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 Yankton, SD
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location: 42.89, -97.39     debug


Area Discussion for - Sioux Falls, SD
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Fxus63 kfsd 231138
afdfsd
area forecast discussion
national weather service sioux falls sd
538 am cst Thu nov 23 2017

Short term (today and tonight)
issued at 308 am cst Thu nov 23 2017
the main story for today will be warming temperatures in a
developing southwesterly low level flow as strong low pressure
begins to slide along the u.S. Canadian border through the day. With
925 mb temperatures around 18 c in our southwest, looking at highs
into the lower 70s through south central sd, then rapidly tapering
downward to the north and east, with highs only in the upper 40s to
lower 50s east of interstate 29. With limited mixing and relatively
weak winds aloft, it will be less breezy than yesterday.

In a warm air advection regime, tonight will be very mild for this
time of year. Lows will run in the upper 30s to lower 40s.

Long term (Friday through Wednesday)
issued at 308 am cst Thu nov 23 2017
the aforementioned low pressure continues to slide eastward on
Friday, pulling a cold front through our area during the day. With
the cold air advection and rapid pressure rises, it will be a very
wind day with gusts of 25 to 30 kts into the afternoon, and again
had to raise wind speeds slightly over given guidance. Shortwave
energy does drop across the region during the day, but in the
absence of any significant moisture, only limited rain chances will
exist - north of interstate 90 early in the day. Temperatures will
again be mild with highs 50s to lower 60s.

After a brief cool down on Saturday, temperatures rebound once again
for Sunday and Monday, and based on thermal profiles, raised highs a
bit over given guidance - well into the 50s and 60s, with Monday
being the warmer day. Models then begin to diverge through the
middle of next week in the evolution of an upper level trough over
the western CONUS which then slides eastward into the plains during
the period. One change from previous runs is that all models have
now trended dry for Tuesday and Wednesday, so removed precipitation
chances in the extended. Model consensus does indicate cooler
temperatures for the end of the extended - nothing extreme, but
trending closer to normal for this time of year.

Aviation (for the 12z tafs through 12z Friday morning)
issued at 519 am cst Thu nov 23 2017
vfr conditions are expected through the TAF period with passing
high clouds through this evening. Light variable winds will shift
to the south-southwest by mid-morning.

Fsd watches warnings advisories
Sd... None.

Mn... None.

Ia... None.

Ne... None.

Short term... Jm
long term... Jm
aviation... 05


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yankton, Chan Gurney Municipal Airport, SD2 mi57 minNW 510.00 miFair29°F27°F92%1018.9 hPa

Wind History from YKN (wind in knots)
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Last 24hrSE11S12S16
G22
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G21
S14S13S9S8S8S7S3S4SW3W4NW11NW10NW10NW8NW4W5W6N3NW5
1 day agoNW19
G25
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G27
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NW21NW19
G25
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NW17NW10NW4NW5NW3W6NW4W7NW4S5CalmCalmCalmSE3SE4E4E3
2 days agoSW8SW6SW11SW7SW10CalmSW3W4SW3SW4CalmSW5W7W7NW10NW14N20N15NW12NW14
G18
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G26
NW20
G28
NW22
G30
NW15
G23

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_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Sioux Falls, SD (9,2,3,4)
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Ground Weather Radar Station Sioux falls, SD
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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.