Tuesday, September25, 2018 L-36.com


Marine Weather and Tides
Nevada, IA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 7:04AMSunset 7:06PM Tuesday September 25, 2018 7:56 AM CDT (12:56 UTC) Moonrise 6:49PMMoonset 6:24AM Illumination 100% Phase: Full Moon; Moon at 15 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 Nevada, IA
   Hourly   EDIT   Help
location: 42.02, -93.46     debug


Area Discussion for - Des Moines, IA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdmx 251218
afddmx
area forecast discussion
national weather service des moines ia
715 am cdt Tue sep 25 2018

Discussion today through Monday
issued at 451 am cdt Tue sep 25 2018
today... A cold front has pushed through roughly the northwest
half of the state with little more to show for it at this time
other than some low clouds... Fog and a wind shift. The progress of
t he cold front will slow some this morning across the area but
should be out of our forecast area and into eastern iowa by
19-21z. Meanwhile, the NAM picks out a shortwave very well that is
currently over central nebraska. This shortwave will push into
iowa early this morning then across the forecast area by early
afternoon. All indications are that when this shortwave approaches
and interacts with the frontal boundary, showers and
thunderstorms will develop along the boundary and move across the
state. By the time we get to peak heating, this feature will be
mostly east of iowa and more robust to severe storms are possible
in those locations across far eastern iowa... Illinois and even
into indiana and southwest lower michigan. For central
iowa... Really not expecting much. Rainfall is expected to be light
to maybe moderate with the stronger storms showers. Instability
is pretty weak however, forecast soundings do show a window from
13z to 17z where better instability will be present. Shear is
pretty decent but it is all post frontal so it will not affect
storms much. However during this brief window of stronger
instability where values actually get to between 1800 and 2000
j kg there will be enough shear present to produce a few stronger
storms possibly with nickel hail or so and strong wind gusts.

Temps today are problematic. Behind the front much cooler air is
in place and with the anticipated low clouds remaining and precip
to fall, I don't expect temps to climb much from their morning
readings. Across the southeast where the front has yet to pass,
these areas should climb into the lower to mid 70s before falling
with the frontal passage.

By tonight the front clears the state and the shortwave moves east.

With this passage the threat for rainfall will rapidly end by early
evening across the far southeast. The threat for showers storms
will end by afternoon for locations across northwest into central
iowa. Lows tonight will be pretty cold with readings in the lower to
mid 40s being forecast.

Cooler temps were kept in place for Wednesday as a surface high
keeps at least low level cold advection going. This should pop some
stratocu during the afternoon. Wednesday night will remain cool as
well with lows similar to tonight.

On Thursday into Thursday night, another upper trough crosses the
region driving another surface low and frontal boundary across the
region and more cold air. There is not much recovery of moisture so
i don't see much in the way of additional rainfall with this system
though northern iowa would certainly be the the location to receive
at least some lighter precip.

Yet another upper trough plows through the region on Friday into
Saturday driving yet another cold front through the region and more
cold air. Models stall this boundary across southern iowa northern
missouri but with little chance for any moisture recovery, not
really seeing any big rain chances at this point, however central
into southern iowa would be the area with the best chance for
precip. By this time, models vary quite a bit with the euro shoving
the front well south of the area Saturday and a big surface high
pushing across the state. The GFS and canadian models hang the
front across us and hint at a weak shortwave coming across a more
zonal flow. This would bring a better chance for showers and with
the rain and clouds... Slightly cooler temps. All this pushes east
by Sunday with highs expected to move back into the 60s and lower
70s.

Heading into next week, a surface low over the plains will have a
warm front extend into our area bringing at least some chance for
showers back into the forecast for Sunday night through early next
week. At least it should be warmer.

Aviation for the 12z tafs through 12z Wednesday morning
issued at 715 am cdt Mon sep 24 2018
cold front moving through the state today. Behind the front are
ifr lifr CIGS and vsbys in fog. Ahead of the front isVFR MVFR
conditions. Showers and storms will overspread the area today as an
upper level feature moves across. TAF locations most likely to be
impacted by storms are kdsm and kotm but all TAF locations will see
at least a brief period of showers storms and lifr conditions.

Dmx watches warnings advisories
None.

Discussion... Fab
aviation... Fab


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
Ames, Ames Municipal Airport, IA9 mi63 minN 510.00 miOvercast62°F59°F90%1010.6 hPa
Boone Municipal, IA21 mi61 minN 910.00 miOvercast59°F57°F94%1011.2 hPa
Ankeny Regional Airport, IA24 mi61 minN 010.00 miOvercast61°F60°F100%1011.2 hPa

Wind History from AMW (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 24hrCalmSE10SE8SE7S14
G22
S15
G27
S12
G22
S13
G20
S10
G15
S10
G17
S11S6S5S4SW4CalmS4CalmCalmSE3CalmNW5N7N5
1 day agoCalmSE6S5S6S11S9SE9S13S9
G20
SE15S14
G20
SE8SE4SE5SE4SE3SE6SE4SE4SE3SE3CalmSE3Calm
2 days agoCalmSE7SE11S10SE9SE8SE7S6SE7SE6SE6SE6S3S5S5S6SE4SE3CalmCalmCalmCalmCalmCalm

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)   HelpWeather Map
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 Des Moines, IA (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Des Moines, IA
   (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.