Monday, August20, 2018

Marine Weather and Tides
Cuba, MO

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Sunrise 6:26AMSunset 7:54PM Monday August 20, 2018 10:02 AM CDT (15:02 UTC) Moonrise 3:02PMMoonset 12:21AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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 Cuba, MO
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location: 38.09, -91.42     debug

Area Discussion for - St. Louis, MO
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Fxus63 klsx 201211
area forecast discussion... Updated aviation
national weather service saint louis mo
711 am cdt Mon aug 20 2018

Short term (through late tonight)
issued at 350 am cdt Mon aug 20 2018
the current acrhing band of showers and thunderstorms centered
across western il is occuring in association with low level
moisture convergence via a southwesterly LLJ along with a vort max
rotating thru eastern mo. Present indications are the band along
with some trailing more scattered type activity will continue to
move northeast as the vort MAX rotates northeast and the llj
veers, placing the bulk of the activity just east of the CWA by
12z. The lingering more scattered showers storms in the wake of
the main band should exit the CWA by mid-morning as well, although
scattered showers could continue in northeast mo and west central
il off and on this morning.

Like discussed yesterday, I think from mid morning until early
afternoon we will be in a lull with possibly some spotty showers.

Stratus will overspread central and northeast mo this morning,
however to the east of that across east central and southeast mo
into western il we should see some decent diurnal heating. This
should result in modest destabilization with SBCAPE values
possibly around 1500 j kg by early afternoon. Present thinking is
that large scale ascent associated with the migratory upper trof
along with lift along ahead of the advancing cold front will
result in the development of scattered thunderstorms by 19-20z.

The majority of the models are showing an axis of more pronounced
convergence from st. Louis to steelville and in this region the
coverage of storms should be a bit greater, evolving into a broken
line and moving east through the mid-late afternoon across
southeast mo and southwest il. Deep layer shear on the order of 35
kts would support both multicell and short-lived supercell modes,
with a predominant large hail and damaging wind threat. The
broken line of storms should be located across the far eastern cwa
at 00z, and exiting east by mid-evening with scattered coverage
of showers and storms further west. The threat of storms will end
with waning instability by mid-late evening and with the passage
of the cold front. Stratus will then overspread the area through
the remainder of tonight with some spotty showers in the post-
frontal post surface low cyclonic flow.


Long term (Tuesday through Sunday)
issued at 350 am cdt Mon aug 20 2018
cooler weather in general is expected on Tuesday and it still
appears there will be an extensive amount of cloud cover, especially
in the morning. Cyclonic flow will dominate in the wake of the
departing system along with high levels of 925-850 mb rh, suggesting
that stratus stratocu will be prominent. There could also be some
lingering spotty light showers across the eastern part of the

Below normal temperatures still look on track for Wednesday and
Thursday as an impressive 1020+ mb surface high pressure system
dominates the sensible weather. The pattern aloft however will
begin a transition to more progressive late Thursday into Friday.

The combination of a migratory trof translating across the
mid-upper ms valley and the development of return flow and
southwesterly LLJ in the wake of the retreating anticyclone, will
result showers and thunderstorms late Thursday night through
Friday into Friday night. The return of above average temps summer
heat still looks on track for the weekend as heights build aloft
accompanying the development of an expansive upper high ridge
centered in the lower ms valley.


Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 641 am cdt Mon aug 20 2018
MVFR flight conditions ceilings have overspread much of the area
this morning. There will be some improvement for east central and
southeast mo and southwest il by early this afternoon, which
includes the st. Louis region terminals. Elsewhere I think that
MVFR flight conditions will generally continue. Precipitation will
be at a minimum this morning, spotty showers perhaps, but by
early afternoon we will see scattered showers and thunderstorms
ahead of an advancing cold front and low pressure system. The st.

Louis terminals and points south and east will have the high
probability. The low pressure system and cold front will pass to
the east of the area during the evening with lowering MVFR
ceilings overspreading the entire region in its wake. Gusty
south-southwest surface winds are expected today, with winds
shifting to the west and northwest behind the front tonight.

Specifics for kstl:
MVFR flight conditions ceilings have overspread the area early this
morning. They should persist through the morning with improvement
toVFR by early this afternoon. Precipitation will be at a minimum
this morning, a spot shower perhaps, but by 19-20z we will see
scattered showers and thunderstorms ahead of an advancing cold
front impact the terminal. The low pressure system and cold front
will pass to the east of the area during the evening with lowering
MVFR ceilings spreading into the terminal overnight. Gusty south-
southwest surface winds are expected today, with winds shifting to
the west behind the front later tonight.


Lsx watches warnings advisories
Mo... None.

Il... None.

Wfo lsx

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rolla / Vichy, Rolla National Airport, MO19 mi69 minSW 710.00 miOvercast69°F64°F84%1009.6 hPa

Wind History from VIH (wind in knots)
Last 24hrSE7S7SE6SE8E6SE7E8SE8SE7SE6E11
1 day agoNW7N5NW7N6NW5N4NW4NW4W4NW3CalmCalmCalmCalmCalmCalmE4SE4SE3SE3SE6SE5SE4SE5
2 days agoSW8SW10W7W7W8SW34

Tide / Current Tables for
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Weather Map and Satellite Images
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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.
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Wind Forecast for St. Louis, MO (11,2,3,4)
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Ground Weather Radar Station St. Louis, 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.