Wednesday, May22, 2019 L-36.com


Marine Weather and Tides
Yankton, SD

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 5:53AMSunset 8:53PM Wednesday May 22, 2019 7:41 PM CDT (00:41 UTC) Moonrise 11:39PMMoonset 8:08AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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 230003
afdfsd
area forecast discussion
national weather service sioux falls sd
703 pm cdt Wed may 22 2019

Short term (this evening through Thursday)
issued at 235 pm cdt Wed may 22 2019
scattered showers continue to rotate around the broad upper trough
stretched across the northern plains this afternoon. Overall,
instability remains low, but can't rule out an isolated lightning
strike in areas north of i-90. Temperatures again have struggled
to climb into the 50s, leading to another very chilly mid-may
afternoon.

Tonight: stratus will struggle to clear, and winds may stay elevated
just enough to avoid any fog. However, stratus may lower through
the morning hours given high boundary layer moisture. Temperatures
will fall into the lower to middle 40s.

Thursday: most of Thursday will remain dry, with temperatures
warming back into the 60s. However, this dry spell will be
shortlived as models already hinting at warm advection showers
developing by late afternoon to early evening in nebraska and
south central south dakota.

Long term (Thursday night through Wednesday)
issued at 235 pm cdt Wed may 22 2019
Thursday night: broad synoptic accent will support widespread shower
and thunderstorm chances through the overnight hours and into Friday
morning. Instability remains rather meager through the night, and
lapse rates remain very marginal. However, could see a small
wedge of higher instability driving a small hail risk in areas
east of i-29 very briefly as low-level dry slot moves in.

Friday: rain will quickly slide east after daybreak Friday,
leaving a pleasant start to the long weekend. Temperatures will
warm into the lower to middle 70s in most locations.

Saturday: a weak surface boundary will drift southward into the
region on Saturday, bringing the minor influence of mid-level clouds
to the area. GFS hinting at the potential for a few isolated showers
and thunderstorms developing along and south of this boundary late
Saturday, but the GFS has had some issues this spring with
overzealous convective development.

Sunday: the first two thirds of Sunday will remain dry, but like
clockwork, unsettled weather will return as we finish out the
holiday weekend. Upper troughing is expected to move into the
plains late Sunday into Sunday night, spreading shower and
thunderstorm chances back to the local area.

Memorial day: latest guidance suggested a very unsettled memorial
day holiday as upper troughing pivots through the area. While the
severe weather risk remains low, some model guidance hints at the
small warm sector creeping into NW iowa Monday afternoon and
evening.

Tuesday-Wednesday: rain chances linger into Tuesday, however the
region may be stuck in-between shortwaves moving through the
region. Temperatures will cool down slightly into the middle of
next week.

Aviation (for the 00z tafs through 00z Thursday evening)
issued at 652 pm cdt Wed may 22 2019
MVFR conditions are expected to continue through the period,
mainly along and north of i-90, including kfsd and khon
terminals. Hit and miss showers are possible through early this
evening. Gusty winds will gradually decrease tonight and shift to
the east by Thursday afternoon.

Fsd watches warnings advisories
Sd... None.

Mn... None.

Ia... None.

Ne... None.

Short term... Dux
long term... Dux
aviation... 05


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yankton, Chan Gurney Municipal Airport, SD2 mi46 minWSW 1210.00 miMostly Cloudy57°F46°F69%1008.6 hPa

Wind History from YKN (wind in knots)
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Last 24hrE19
G25
E17
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E12E9E6E9E4E4SE4SE5SE4S5SW7SW16
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1 day agoE8E7E9NE6E8E9NE11E13E12E13E13E15
G22
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E14
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G28
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G29
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E21
G31
E19
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E22
G28
2 days agoN9N11N8N10NE7NE7NE6NE4CalmCalmW5NW3NE7NE11E8E8E10E9E6SE8E10E13
G21
E10E10

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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wmap_A
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 Sioux Falls, SD (20,4,5,8)
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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.