Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Nevada, IA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:46AMSunset 8:35PM Sunday May 20, 2018 4:50 PM CDT (21:50 UTC) Moonrise 10:04AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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 Nevada, IA
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location: 42.02, -93.46     debug


Area Discussion for - Des Moines, IA
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Fxus63 kdmx 202042
afddmx
area forecast discussion
national weather service des moines ia
342 pm cdt Sun may 20 2018

Short term tonight through Monday
issued at 341 pm cdt Sun may 20 2018
upper ridging has passed to the east placing iowa on the backside of
the ridge. A shortwave is lifting up out of the southern plains and
will cross southeast iowa tonight then head into illinois and
wisconsin. To the west, low pressure is developing over the plains.

This low is expected to weaken into an open wave and lift northeast
into mn and wi on Monday. Deeper moisture will lift into southeast
iowa later this afternoon and tonight while a second area of
somewhat better moisture, located ahead of the plains low, lifts
across eastern nebraska and the dakotas and far western into
northwest iowa. Forcing will also increase across these respective
areas as the shortwave lifts up across southeast iowa and the low
shifts east across far west and northwest iowa. This will bring
more showers and thunderstorms into southern and western iowa this
evening lifting northeast overnight into Monday. With unusually
weak flow for may, with little more than 20kts through almost 500mb,
not really considering any type of severe threat but stronger storms
could certainly produce some locally heavy rainfall... Especially
southeast.

By Monday afternoon we will only be dealing with the remnant of the
wave across northern northeast iowa for some lingering precip in
that area. Soundings indicate quite a bit of low level moisture so
low clouds will be problematic and will likely hang around through
Monday... Especially across the north. Southern iowa may see Sun in
the afternoon. Temps will be pretty cool across the state Monday
due to the cloud cover and a northwest wind at the surface. We will
generally see mid upper 50s north to the upper 60s low 70s south.

Long term Monday night through Sunday
issued at 341 pm cdt Sun may 20 2018
a ridge builds back over the region for Monday night Tuesday for
somewhat of a break from precip. However on Tuesday, most models do
suggest a shortwave breaking through the ridge, traveling across
southern central iowa for some potential for precip. Being that it
is shifting east under general ridging and no real boundary around,
any precip should be very hit or miss and light.

Tuesday night and Wednesday a stronger wave rides up the ridge
bringing a better chance for showers and storms into western then
northern iowa. Through this whole period any support for severe
storms is marginal at best so any potential will be tied to areas
where better forcing and instability exist. Since this will be
better determined in the coming days I will keep to the current
wording in products. One other item of note is with the ridge
building into the region, we will be seeing much warmer temps
and dewpoints into the mid 60s so much more humid than we have
been seeing as well.

Wednesday night through Saturday morning is the most interesting
time in the long term. A deep trough over the west will lift into
the northern rockies and across the northern plains into the upper
midwest. This trough will flatten the ridge over the region with
time. Ahead of this, another decent shortwave will cross iowa
mainly across the north Thursday night Friday. Showers and storms
will again be possible and given the strength of this wave, a few
strong storms will be at least possible. Friday night and Saturday
the upper trough will deepen, sink south and pass to the east by
late Saturday. Additional chances for showers storms will occur
through early Saturday over much of the state but by afternoon, the
trough axis should be east of the state and the best chances will be
across the east to southeast iowa. Drier and cooler air will work
into the state then and we will enter a quieter period.

Aviation for the 18z tafs through 18z Monday afternoon
issued at 1233 pm cdt Sun may 20 2018
widespread MVFR to ifr CIGS are expected to continue across iowa
through the forecast period. Isolated showers will impact taf
locations mainly tonight with scattered showers and thunderstorms
at near kotm. Winds will continua to be northeast AOB 10kts.

Dmx watches warnings advisories
None.

Short term... Fab
long term... Fab
aviation... Fab


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ames, Ames Municipal Airport, IA9 mi57 minENE 86.00 miFog/Mist60°F57°F90%1019 hPa
Boone Municipal, IA21 mi55 minENE 107.00 miOvercast61°F57°F88%1019.3 hPa
Ankeny Regional Airport, IA24 mi55 minENE 79.00 miOvercast63°F59°F88%1019.3 hPa

Wind History from AMW (wind in knots)
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Last 24hrN5N16N13N12N10
G17
N7N10NE8N9N12N11N10N10N9NE9N9NE10NE12NE10NE7NE8NE10NE9NE8
1 day agoSE12SE12
G18
SE8SE11SE8SE6E5S5S6E4CalmCalmE3CalmCalmCalmSE4CalmNE4NW7N9N11SE19
G26
SW8
2 days agoE9
G14
SE5SE12SE6SE6SE3E3SE3E3SE6E3E5E6--E4E6SE10SE8
G16
S9SE9
G17
S9SE11
G18
E7
G15
SE11

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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GOES Local Image of Midwest    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Des Moines, IA (17,4,5,8)
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Ground Weather Radar Station Des Moines, IA
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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.