Monday, August26, 2019

Marine Weather and Tides
Reed Creek, GA

Version 3.4
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:58AMSunset 8:06PM Monday August 26, 2019 6:00 AM EDT (10:00 UTC) Moonrise 1:33AMMoonset 4:18PM Illumination 18% Phase: Waning Crescent; Moon at 25 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 Reed Creek, GA
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location: 34.5, -82.83     debug

Area Discussion for - Greenville-Spartanburg, SC
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Fxus62 kgsp 260715
area forecast discussion
national weather service greenville-spartanburg sc
315 am edt Mon aug 26 2019

A cool wedge of high pressure will linger across the region today,
but will break down ahead of an approaching cold front Tuesday. The
front is expected to cross the region on Wednesday. Drier weather
is possible behind the front to end the work week.

Near term through tonight
As of 234 am edt: quiet across the fcst area at this early
hour, but upstream radars are picking up isolated showers moving
northward to our west. This could bring a few showers across
the western-most part of the fcst area in the pre-dawn hours, so
precip chances will be amended to take care of that. Otherwise,
no changes.

A slowly-evolving upper blocking pattern over the northeast will
continue to support sfc high pressure over ERN canada and the nrn
new england states today. This high pressure ridge will continue to
wedge down the east side of the appalachian mtn chain into tonight,
keeping cool and stable air in place. The cold air damming is not
particularly strong and lacks moist upglide. That will not be the
case across the mtns as upper divergence and a passing short wave
will help to force light shower activity that increases in coverage
during the day. The environment should remain inhospitable thru
sunset across the piedmont of the carolinas, so the wedge will
essentially remain dry again today. Precip prob continues to
increase tonight as moisture deepens and isentropic lift above
the lingering wedge gets involved. By daybreak Tuesday, precip
will be likely across the mtns and foothills, but thunderstorm
chances are small owing to the lack of instability.

Short term Tuesday through Wednesday night
As of 200 am mon: cold-air damming will continue in our area
into Tuesday, as southwesterly flow will persist atop the
wedge. Plentiful cloud cover is expected. In terms of a scouring
mechanism, there's not much to go on besides continued modification
of the airmass in place. Thus MAX temps again will be kept down
on the order of 7-10 degrees below climo. Pops of at least chance
range are warranted across the area on account of the upglide,
but higher chance to likely near the higher terrain and in the sw
cwfa, nearer the wedge boundary, where some sfc-based instability
will be in play. Relatively low instability but short mbe vectors
suggest the main concern with any t-storms would be heavy rainfall.

As a shortwave rounds the upper low over ontario, heights will fall
across the mid-mississippi valley Tuesday night, and subsequently
the southern appalachians on Wednesday, and a cold front will
advance east thru these areas. Winds will veer to westerly and
whatever's left of the wedge will dissipate. The timing of the
front will be timed to enhance diurnal convective potential. While
instability isn't particularly impressive for this time of year,
prog soundings are pretty dry aloft and imply a nonzero damaging
wind threat; 0-6km shear along and ahead of the front will support
development of a linear MCS along the front. Temps will rise back
to within a category or so of normal, trending a bit cooler again
for Thursday morning, as the dry post-frontal airmass filters in.

Long term Thursday through Sunday
As of 300 am mon: dry high pressure will expand across the
southeast Thursday and Friday beneath the entrance region of a deep
trough; the cold front will weaken and become stationary to our
south. Subsidence will suppress deep convection across the area,
and pops are unmentionably low almost everywhere both days. Temps
will moderate back to seasonable warmth, though dewpoints will be
several degrees below normal. As heights rise aloft, quasi-zonal
flow develops, and warm advection begins over the old frontal
boundary. This will lead to an upward trend in pops over the
weekend and a return of more seasonably humid conditions.

Aviation 07z Monday through Friday
At kclt and elsewhere: our cold air damming wedge will remain in
place into Monday, and as a result, low cloudiness will persist
through the period. Of immediate concern is the development of an
MVFR-level cloud deck over the mtns and foothills that will affect
most terminals, with the exception of kclt. A weak southerly upglide
may not allow the lowest cloud deck to develop that far east before
daybreak, thus kclt remainsVFR through the period. Not so at the
other terminals, where eventually the MVFR deck will develop before
daybreak, and then lift toVFR with daytime heating. Wind should
remain light NE into tonight. Deeper moisture with the approach
of a system from the west will bring a shower chance across the
mtns this evening, but this will probably remain west of the other
terminals, especially kclt, through 06z Tuesday.

Outlook: deep-layer moisture and another frontal system approach
the fcst area by late Tuesday with associated restrictions and
showers and storms becoming likely. Gradually improving drying
conditions are expected for the latter half of the week.

Confidence table...

07-13z 13-19z 19-01z 01-06z
kclt high 100% high 100% high 100% high 100%
kgsp high 84% high 91% high 90% high 85%
kavl med 71% med 70% high 85% med 75%
khky high 100% med 75% high 100% high 80%
kgmu high 92% high 91% high 90% high 85%
kand high 91% med 62% high 90% med 76%
the percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables and ensemble forecasts
are available at the following link:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHDS1 - Strom Thurmond Dam, SC 67 mi100 min NE 2.9 G 4.1 69°F
LMFS1 - Lake Murray SC 87 mi40 min NNE 1.9 G 4.1 68°F 1016.9 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anderson, Anderson County Airport, SC6 mi64 minENE 810.00 miOvercast70°F60°F71%1017.4 hPa
Pickens County Airport, SC22 mi3.1 hrsNE 410.00 miOvercast69°F65°F91%1019.3 hPa

Link to 5 minute data for KAND

Wind History from AND (wind in knots)
Last 24hrNE10
1 day agoCalmCalmCalmE7E9NE9E7NE11NE13NE14E16NE14E16NE12NE9
2 days agoCalmN3Calm33W8SW536NW14W5NW6NW5N4CalmS8S5S6SW5S5W3W3CalmCalm

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    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

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Wind Forecast for Greenville-Spartanburg, SC (6,6,7,8)
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Ground Weather Radar Station Greer, SC
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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.