Friday, March24, 2017 L-36.com


Marine Weather and Tides
Nevada, IA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:07AMSunset 7:33PM Friday March 24, 2017 8:54 PM CDT (01:54 UTC) Moonrise 4:15AMMoonset 2:53PM Illumination 7% Phase: Waning Crescent; Moon at 27 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 242353
afddmx
area forecast discussion
national weather service des moines ia
653 pm cdt Fri mar 24 2017

Short term /tonight through Saturday/
issued at 352 pm cdt Fri mar 24 2017
20z Fri water vapor imagery clearly showing upper low
spinning/propagating eastward across the tx/ok panhandle. Sfc
reflection nearly vertically stacked with this low, with warm front
extending and oriented sw-ne all the way through iowa. All models
have done a terrible job of handling the progression of the front,
which has demonstrated upwards of a 20 degree temperature
gradient over only a 50 mile span. Models have generally been too
slow and too far north and west with the boundary. Subsequently,
the models have been too far north and west with precip as the
best forcing/saturation phasing has been confined along and SE of
the boundary. With stratus covering the CWA and lack of
waa/moisture advection to help generate instability, have
generally removed thunder from the rest of the forecast... Except
for far southern and SE cwa. With the cloud cover, not much of a
diurnal swing expected overnight-Saturday.

For Saturday, 500mb charts showing this low becoming "cut-off". This
helps track the low nne through missouri and into northern illinois.

This projected track seems plausibly, as the low almost begins to
show signs of wanting to retrograde Sunday morning. With cloud
cover expected to continue Saturday and the source region for air
on Saturday being nearly overhead, have knocked Saturday's highs
down close to persistence from today.

Long term /Saturday night through Friday/
issued at 352 pm cdt Fri mar 24 2017
20z water vapor imagery also picking up on a longwave trough coming
onshore along the western coast of the conus. This trough will slide
across the rockies by late Sunday, serving to push the low impacting
us in the short term off to the east and preventing it from
retrograding. Medium range models are starting to dial in with a
southerly track across the ozarks for the sfc reflection. The ecmwf
has been the most consistent with the track over the past few days,
so have favored it as a guidance solution. Resultingly, have lowered
pops for Monday... And cannot rule out precip chances being removed
for most of iowa in future updates if southerly solution holds.

The next upper low looks to impact the midwest Thursday. In between
Monday and Thursday, not a lot happening as our region will be more
or less locked in zonal flow. With this overall large-scale setup,
have begun to nudge temperatures towards a persistence forecast.

As typical, long-range models showing variation with Thursday low.

The ECMWF is much further north, meaning a precip-filled middle
to end of the week if it verifies... Whereas the GFS is further
south... Meaning clouds for iowa. Regardless of model, at this
time, best instability looks to be south and SE of iowa, meaning
thunder chances are initially marginal at best. Will not sweat
details now, as much time for variation between now and Thursday.

Aviation /for the 00z tafs through 00z Saturday evening/
issued at 653 pm cdt Fri mar 24 2017
poor conditions to remain for much of the period with ifr/MVFR
cigs. -ra and br also prevalent with occasional 2sm possible at
kotm/kalo nearer 12z. For now deformation rain should cut off
south of kmcw with vcsh there. As cool air entrains into system
after 12z sat... Much of area will see CIGS under 500 with stronger
northeast winds gusting to near 25 kt at times over the north and
15-20kts south sites kdsm/kotm. /rev

Dmx watches/warnings/advisories
None.

Short term... Kotenberg
long term... Kotenberg
aviation... Rev


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ames, Ames Municipal Airport, IA9 mi62 minNNE 116.00 miLight Rain Fog/Mist43°F43°F100%1016.2 hPa
Boone Municipal, IA21 mi60 minNNE 14 G 204.00 miLight Rain41°F41°F100%1015.9 hPa
Ankeny, Ankeny Regional Airport, IA24 mi60 minNNE 13 G 185.00 miFog/Mist45°F42°F93%1015.6 hPa

Wind History from AMW (wind in knots)
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Last 24hrSE10SE7SE7SE9SE8SE8SE8SE6CalmS3CalmCalmNW9NW7NW13N10N8NE11N12N10NE10NE9N8N11
1 day agoSE11SE13
G18
SE12SE13
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G21
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G25
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SE10E14
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2 days agoN10N11N10N8NE10NE8NE6NE4NE6NE5E6E9E11SE13SE12
G19
SE12
G19
SE13SE9SE13
G18
SE12SE13SE10SE12SE12

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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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Des Moines, IA (21,6,7,8)
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Ground Weather Radar Station Des Moines, IA
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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.