Marine Weather and Tides
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 5:48AM||Sunset 8:38PM||Monday May 20, 2019 3:28 PM CDT (20:28 UTC)||Moonrise 9:43PM||Moonset 6:21AM||Illumination 97%|
7 Day Forecast for Marine Location Near Albert City, IAHourly EDIT Help
Area Discussion for - Sioux Falls, SD  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 kfsd 201722|
area forecast discussion
national weather service sioux falls sd
1222 pm cdt Mon may 20 2019
Short term (today and tonight)
issued at 331 am cdt Mon may 20 2019
cold high pressure building into the area this morning dropping
temperatures back into the 30s in many locations. Frost advisory
still in place north of interstate 90 early this morning but some
patchy mid level cloudiness has so far protected the area from a
pure radiational temperature fall. Clouds will continue to expand
northeast through the day with winds gradually increasing from the
east and southeast. This is in response to developing low pressure
over southern parts of the high plains. The energy from this
developing low pressure is a little slower to lift northward so have
slowed down the development of rainfall. Right now looking like a
good chance for i-29 and east to remain dry all day with some light
rain possible towards sunset. West of the james river it still looks
like rain should develop in the afternoon while also seeing a threat
for some light rain this morning. Raised high along and east of the
james river with a little less dense cloud cover and a later arrival
of rainfall. South central sd may still struggle to get to 50 today.
By tonight moisture advection from about 750mb to 650mb will allow
for some lighter showers to develop and lift north. These showers
will be fighting through some dry air below about 800mb however so
not expecting a lot of accumulation before 6z other than south
central sd where a couple tenths will be possible. From 6z to 12z
tonight the moisture advection lowers in the atmosphere as low
pressure lifts north helping to increase the warm and moist
advection. Expecting around a quarter of an inch near the missouri
river by 12z Tuesday.
Long term (Tuesday through Sunday)
issued at 331 am cdt Mon may 20 2019
windy, cold and rainy conditions still expected on Tuesday as the
upper level low deepens and slowly lifts north across the western
high plains and into central nebraska Tuesday night. East winds will
average about 25 to 40 mph on Tuesday with periods of rain through
the night. Convection not overly likely but will keep a small chance
around northwest iowa with some minor elevated instability creeping
up into eastern nebraska. Rainfall amounts on Tuesday should be a
bit burlier with a half an inch to an inch and a half very possible.
Highs Tuesday likely 50 to 55 most spots.
As the upper level low wraps northward and remains mostly west of
eastern south dakota on Wednesday, dry air will wrap in aloft and|
likely bring an end to the rain. Soundings not overly supportive on
rain on Wednesday as southerly flow mixes out the low levels and
dries out there as well. So, other than the strong southerly winds
gusting to 25 to 35 mph Wednesday may turn out to be an ok day.
Winds will be strongest in far southeast sd, northeast NE and
northwest ia. Highs should range from the lower 60s in central sd
where clouds may linger longest to 70 to 75 in northwest ia.
Upper level ridging builds into the area Wednesday afternoon into
Thursday morning which should keep conditions dry and mild. Lows
Wednesday night in the 40s to lower 50s and highs Thursday from the
mid 60s in central sd to the mid 70s in northwest ia. There will be
an increasing threat for showers and thunderstorms Thursday
afternoon and night as another piece of energy cranks up the warm
and moist advection. Severe weather will be possible during this
time with some very impressive shear possible but right now the cap
appears to be a problem below about 900 mb so the directional low
level shear will go unused but still strong speed shear aloft and
above the cap. Something to watch for.
After this ridging tries to build into the area so mostly dry and
near to slightly above normal temperatures are expected Friday
through Sunday. There are hints of a fast moving upper level wave
Saturday night so will have a chance for showers and thunderstorms
Aviation (for the 18z tafs through 18z Tuesday afternoon)
issued at 1217 pm cdt Mon may 20 2019
vfr conditions are expected through late tonight, then showers
and MVFR conditions are expected through the rest of the period.
Gusty east winds will be on the increase during the overnight
hours. Gusts around 40 knots will be possible late Tuesday
morning into the afternoon.
Fsd watches warnings advisories
Short term... 08
long term... 08
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Storm Lake, IA||15 mi||34 min||E 11||10.00 mi||54°F||39°F||58%||1019.3 hPa|
Wind History from SLB (wind in knots)
|1 day ago||W||NW||NW||SE||S|
|2 days ago||NE||E|
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
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 (16,3,4,5)(on/off)  Help
Ad by Google
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.