Monday, August21, 2017

Marine Weather and Tides
Prairie Village, KS

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 6:37AMSunset 8:05PM Monday August 21, 2017 10:56 AM CDT (15:56 UTC) Moonrise 5:23AMMoonset 7:13PM Illumination 0% Phase: New Moon; Moon at 29 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 Prairie Village, KS
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location: 39, -94.63     debug

Area Discussion for - Kansas City/Pleasant Hill, MO
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Fxus63 keax 211400
area forecast discussion
national weather service kansas city pleasant hill mo
900 am cdt Mon aug 21 2017

Issued at 900 am cdt Mon aug 21 2017
latest radar trends now showing renewed convective development
across eastern kansas and western missouri out ahead of an mcv
circulation lifting east-northeast in well-established monsoonal
southwest flow aloft. Latest goes-16 visible and cirrus channels
show an extensive canopy of cirrus associated with this feature,
and all indications suggest this cloud shield will continue
lifting northeast over our area this morning. Furthermore, a
lingering outflow boundary stretching from southeast nebraska
through the st. Joe region may also serve as a focus for
additional shwr storm development this morning afternoon as the
affects of the MCV continue to lift towards our area. Latest spc
meso page graphics show deep moisture convergence is maximized
along this residual boundary, so additional development this
morning early afternoon appears possible. Its possible some of
the inbound cirrus cloud cover over central kansas thins with
time, but additional clouds from developing convection could
still limit optimal viewing of the eclipse...

Issued at 302 am cdt Mon aug 21 2017
complicating factors are abound for today's eclipse in an active,
unstable pattern across the plains. A convective complex which
formed in northwest ia this evening has begun to propagate south
southeastward as its cold pool strengthens, and will likely
continue to do so over the next several hours as the LLJ feeds
into the system. Evolution of this complex is once again handled
very poorly by high-res models, but corfidi vectors and the
orientation of the instability gradient suggest the south to
south southeast development should continue. Have hand-edited
cloud cover upward as the anvil plume develops south and spreads
to the east across the northeastern quadrant of mo, and then
allowed higher cloud cover to dissipate and advect off to the east
as storms weaken by mid-morning.

An outflow boundary currently evident on radar pushing through the
omaha area will continue to slide southward this morning, and
while the eastern extent of the of the outflow will continue to
push quickly to the south, the western edge may stall near the
ne ks mo border without strong evaporative cooling due north of
the boundary to reinforce its southward propagation. This pre-
existing boundary could serve as a focus for convective initiation
as early as 12pm in an already unstable atmosphere, complicating
the forecast for the eclipse even further. At the same time,
cirrus streaming northward from convection in the high plains will
continue to approach the forecast area, and most models indicate
the thickest cirrus will push into the NE ks mo corner just after
noon. The cirrus is probably the least of the caveats to eclipse
viewing since it may remain thin and broken enough to view the
sun, but the potential for developing low-based thick cumulus is
much more concerning, particularly if the outflow boundary stalls
near the path of totality.

Any storms that develop this afternoon have the potential to
quickly become strong as MLCAPE increases to greater than 2000
j kg, and while deep-layer shear remains questionable with a
weakness in the wind field around 600-500 hpa, decent 0-3 km
shear and enhanced helicity from remnant boundaries could add
organization to any robust storms that develop, and could even
result in a brief tornado in storms that root along a boundary.

This "questionable" shear profile will only serve to enhance the
potential for heavy rain this evening along and ahead of the cold
front as it pushes through the region. Goes-16 WV imagery finally
shows a break in the tropical connection between hurricane kenneth
and the desert southwest, but the damage has already been done as
very high pwats continue to advect northeastward into the plains.

The combination of multiple convection rounds, pwats approaching
2.5 inches, very high warm cloud depths, a deeply saturated
profile, and an increasing low-level jet below weaker steering
winds will definitely set the stage for very heavy rain across
the majority of the cwa. Have kept the flash flood watch as-is,
but will also need to watch how much precipitation falls along the
mo ia border early this morning, which could lower flash flood
guidance even further after yesterday's storms and on top of
additional expected rainfall tonight.

Quieter conditions are finally expected once the front clears out
of the area early Tuesday morning, clearing out low-level moisture
and slashing high temperatures back into the upper 70s to low 80s
for Tuesday through the weekend.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 640 am cdt Mon aug 21 2017
scattered ACCAS will develop around kstj and spread southward
toward kc area terminals by mid to late morning, but should be
based around or above 3 kft. Cirrus will also stream into the
region from the southwest, bringing in a broken to overcast deck
at around 20-25 kft. A few isolated showers or storms are possible
this afternoon, then will become increasingly likely after 00z. A
cold front will push through the region after 03z, and will be
accompanied by widespread thunderstorms and veering winds.

Eax watches warnings advisories
Ks... Flash flood watch from this evening through Tuesday morning for

Mo... Flash flood watch from this evening through Tuesday morning for

Update... 32
discussion... Laflin
aviation... Laflin

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kansas City, Kansas City Downtown Airport, MO8 mi62 minSSE 22 G 3210.00 miThunderstorm and Breezy76°F66°F74%1017.7 hPa
Olathe, Johnson County Executive Airport, KS12 mi63 minSSE 18 G 2910.00 miThunderstorm and Breezy72°F66°F82%1017.3 hPa
Lee's Summit, Lee's Summit Municipal Airport, MO14 mi63 minW 87.00 miThunderstorm Light Rain70°F68°F93%1018.8 hPa
Olathe, New Century Aircenter, KS18 mi63 minSSE 1010.00 miThunderstorm in Vicinity78°F68°F71%1017.4 hPa
Kansas City, Kansas City International Airport, MO23 mi63 minSSW 1210.00 miMostly Cloudy83°F73°F74%1016.8 hPa

Wind History from MKC (wind in knots)
Last 24hrSE9SE11SE8
1 day agoCalm3CalmW4NW4CalmE5SE6SE7SE7SE5SE6SE5S13S10S9S6S5SW8N9E33E5SE9
2 days agoSW7SW6SW13

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
IR Satellite Image from GEOS

GOES Local Image of Midwest    EDIT

Wind Forecast for Kansas City/Pleasant Hill, MO (11,2,3,4)
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Ground Weather Radar Station Kansas City/Pleasant Hill, MO
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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 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 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.