Monday, June26, 2017 L-36.com


Marine Weather and Tides
Aten, NE

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 5:54AMSunset 9:11PM Monday June 26, 2017 7:18 AM CDT (12:18 UTC) Moonrise 7:54AMMoonset 10:25PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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 Aten, NE
   Hourly   EDIT   Help
location: 42.87, -97.49     debug


Area Discussion for - Sioux Falls, SD
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kfsd 261121
afdfsd
area forecast discussion
national weather service sioux falls sd
621 am cdt Mon jun 26 2017

Short term (today and tonight)
issued at 417 am cdt Mon jun 26 2017
scattered showers and a few thunderstorms will continue to drift
southeastward across our southern zones through the early morning
hours. There is clearly a vort filament extending across the
forecast area, especially through our eastern zones from north to
south in the morning hours. In addition, mid level QG forcing
is evident from 700-500mb departing northwest ia by 18z, as well as
surface troughing extending eastward across far northern nebraska.

As the morning progresses, mid level moisture wanes in our south
ending the rain threat, and surface high pressure oozes southward
keeping the air mass seasonably chilly. Will watch for the formation
of patchy fog as surface dew point depressions are very small early
this morning north of the clearing line. If any fog develops, it
will generally be along and north of I 90. Temperatures will mix to
above 850mb this afternoon, but soundings showing a fair amount of
cumulus popping from the james eastward, therefore highs will mainly
be in the upper 60s to mid 70s.

Not a lot going on tonight. Winds will shift to the southeast and
south, increasing a bit west of the james valley later tonight.

Preferred bias corrected MOS lows which showed a trend of chilly
lows in our east where winds will be the lightest, but milder
readings in our west with the stronger southerly winds.

Long term (Tuesday through Sunday)
issued at 417 am cdt Mon jun 26 2017
main concern within the medium range this morning is the threat for
severe storms on Tuesday night and early Wednesday.

Increasing southerly jet will bring strong south winds to the area
on Tuesday, likely gusting in excess of 30 mph for most locations.

This will bring an increased transport of moisture into the region,
slowest in the east where trajectory remains a bit more out of the
exiting low-level ridge into early evening. With ridging aloft,
push of warmer temperatures and steeper 7-500hpa lapse rates will
keep chances for storms minimized through the day. However, still
will have to watch for a bit more elevated moisture to become
involved, for this could increase threat of a few mid-level
showers storms during the afternoon as lapse rates in excess of
8c km push through southeastern sd. Somewhat limited mixing depth
with warming aloft makes for highs from upper 70s east of i-29 to
perhaps the mid 80s west of the james river.

Likely genesis region for convection will occur across western
portions of sd during the late afternoon into very early evening, in
lee of the black hills and along the frontal convergence as wave jet
begins to punch into the ridge in the high plains. Environment
heading into the evening suggests elevated CAPE from 1500-2000 j kg,
and the 45-55kt low-level jet stretching out low-levels in fairly
nice turning hodograph. Rooting out useful shear, looks like
effective values of 30-40 kt. As long as storms can work toward a
more elevated nature, should see maximized severe threat for large
hail and damaging wind west of the james valley through the evening
hours, although the hail size will be increasingly limited by the
warm temperatures aloft as well as likelihood of more linear
structures competing updrafts developing through the evening as
shear vectors remain aligned main along boundary. Presence of the
warm and dry layer aloft will likely impede the strongest storm
potential heading eastward toward i-29 and beyond, and shear being
largely line-parallel will also lead to a decreasing threat of
severe wind gusts as likely MCS works eastward. Marginal threat
seems appropriate.

Some convection will likely be lingering into the morning around
northwest ia and southwest mn as low-level jet continues to veer, and
precipitation could come to a slightly more rapid end with effective
outflow boundary progressing along with wave and well ahead of main
synoptic boundary. With passage of wave, more westerly component
should quiet down convective threat most areas, with perhaps a
limited chance through the afternoon across mainly northwest iowa as
the boundary of more limited convergence presses through, but fairly
unlikely to modify airmass in wake of overnight early morning
storms. Behind the front, readings likely to reach well into the
80s through the western missouri river corridor.

Boundary will continue to push southward through early Thursday,
south of i-80, but as another wave drops out of the canadian rockies
and into the northern plains later Thursday into Thursday night,
this should wander a bit more northward as low pressure organizes to
the south. While impacts in terms of severe weather are likely to
remain south of the area later Thursday Thursday night, there should
be an increase in potential for thunderstorms starting later
Thursday afternoon in the missouri and james river areas, spreading
north and east across the area overnight.

Less confident in the overall pattern from Friday onward, as models
take closed wave through the northern plains in some way, shape and
form through Saturday. Run to run continuity could be characterized
as shaky at best. Precipitation is likely overdone Saturday and
Sunday, at least in coverage. Temperatures should start Friday as
the coolest day, then slight day to day warming through Sunday.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 620 am cdt Mon jun 26 2017
aside from some patchy shallow fog very early this morning,VFR
will prevail for the rest of today and tonight.

Fsd watches warnings advisories
Sd... None.

Mn... None.

Ia... None.

Ne... None.

Short term... Mj
long term... Chapman
aviation... Mj


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
Yankton, Chan Gurney Municipal Airport, SD7 mi22 minN 3 miFair52°F50°F93%1024.3 hPa

Wind History from YKN (wind in knots)
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
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
Last 24hrNW9NW14NW14
G20
NW14
G20
NW14
G18
NW13NW10
G20
NW11NW10N7Calm3SE7E4E4S7--NE7NE10E8CalmSE5CalmN3
1 day agoSW5W9W17
G21
W21
G26
W22
G30
W20
G29
NW26
G32
NW25
G33
NW21
G32
NW20
G27
NW21
G30
NW17
G25
NW15
G18
N8N7N5N8NW4W6W7W8W8W6NW7
2 days agoNW22
G28
NW24
G30
NW19
G26
NW14NW20
G27
NW22
G27
NW18
G23
NW17
G23
--NW16
G22
NW13
G20
NW15
G24
NW13NW7NW7NW7W5--W6NW5W6SW6W6SW6

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_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Sioux Falls, SD (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Sioux falls, SD
   (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.