Saturday, September23, 2017

Marine Weather and Tides
Homeland Park, SC

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 7:18AMSunset 7:26PM Saturday September 23, 2017 8:47 AM EDT (12:47 UTC) Moonrise 9:30AMMoonset 8:47PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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 Homeland Park, SC
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location: 34.46, -82.74     debug

Area Discussion for - Greenville-Spartanburg, SC
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Fxus62 kgsp 231019
area forecast discussion
national weather service greenville-spartanburg sc
619 am edt Sat sep 23 2017

Drier and stronger high pressure will continue to build through the
weekend and persist through at least the middle of next week. In the
meantime, tropical cyclones jose and maria will remain off the east

Near term through tonight
615 am edt update... Patchy non dense ground fg is developing across
the SRN upstate and NE ga which will burn off aft 13z. The same
dissipation timing GOES for the low stcu and vsbys across the mtn
valleys. Localized temps were bumped up a little based on
obs... Mainly across the higher terrain where cloud cover has been

A rather straightforward fcst is in store over the next 24-36 hrs.

Good confidence continues with a persistent synoptic scale pattern.

The main synop difference outside of a persistence type fcst for
today will be the NRN movement of hurricane maria, which is progged
to well northeast of the bahamas by the end of the near term. The
nw rn influence zone of maria may enhance the already strong subs
over the area however. Meanwhile... Continued dry bl air will adv in
from the NE due to an interaction of a 590 dm high and the remnants
of jose. Thus... Will expect a lower chance of convec today than
yesterday with the best chances, although low-end, confined to the
far SW rn nc mtns and up and mtn spine within weak E ly mech lift.

Limited SBCAPE will preclude much of a stg svr threat and will
anticipate only a few general pulse tstms outside of isol sct -shra.

Max temps shud have no problem reaching a cat or so abv normal while
mins also continue a few degrees above normal over the SRN zones.

Drier llvl air working in from the NE will allow for better rad
cooling overnight... But the morning fg threat will be lower as tdd s
remain a little too high outside the mtn valleys.

Short term Sunday through Monday night
As of 325 am Saturday: stagnant dry unseasonably warm weather will
persist through the short term and into the medium range, as a
highly amplified upper ridge tightens its grip on the eastern conus.

The air mass is expected to become drier and more stable early in
the week, as surface ridge strengthens with the upper anticyclone
gradually spilling east of the northern central appalachians, and the
surface gradient tightens in response to tropical cyclone maria
moving north from the bahamas. Thus, even the isolated diurnal
convection that is expected over portions of the high terrain today
is expected to be a thing of the past by early next week. Temps will
remain above climo, but moderated slightly from recent days by
northeast low level flow.

Long term Tuesday through Friday
As of 330 am Saturday: upper ridging will persist along the east
coast into the medium range, although model run-to-run consistency
is resulting in increasing confidence that a pattern change is on
the horizon, as a series of potent short wave troughs are depicted
breaking down the ridge late in the week. In the interim, the
seasonably dry and not-so-seasonably warm weather will persist into
at least mid-week, as large scale subsidence persists within the
axis of the upper ridge, but also on the west side of t.C. Maria.

A cold front associated with the introduction of large scale height
falls into the eastern CONUS will likely impact the area within the
late Thursday through early Friday time frame. However, it's looking
increasingly likely that this will be largely a dry front for the
forecast area, as the circulation around maria maintains a dry ne
low level flow. Slight chance pops will be maintained for mainly the
far western mountains during the aforementioned time frame, although
even that may be on the generous side. By the end of the week, temps
should be much closer to normal, if not a bit cooler than climo, as
continental high pressure builds into the southeast.

Aviation 10z Saturday through Wednesday
At kclt and elsewhere: high pressure centered north continues to
dominate the pattern making for generally weak NE ly to E ly winds
thru the bl during the TAF period all sites. Tdd S are running a
little low this morning so expect patchy ground fg outside the mtns
in calm winds. Kavl will see lifr conds breaking up btw 13z-14z. Not
much moisture to work with this afternoon... So expectVFR CU with
little or no good chance of -shra or tstms outside of the far WRN nc
mtns and NE ga. A return to flight restrictions overnight is
possible across the mtn valleys and adjacent fthills but with drier
air working in... Not as likely as the past couple mornings.

Outlook: precip chances will wane through the weekend and early next
week. With clear skies and calm conditions, fog and or low stratus
are likely to return in the mtn valleys each of the next few

Confidence table...

10-16z 16-22z 22-04z 04-06z
kclt high 91% high 100% high 100% high 100%
kgsp high 83% high 100% high 100% high 100%
kavl med 70% high 100% high 100% high 100%
khky high 91% high 100% high 100% high 100%
kgmu high 83% high 100% high 100% high 100%
kand high 91% high 100% high 100% high 100%
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 62 mi67 min Calm G 1 69°F
LMFS1 - Lake Murray SC 82 mi27 min Calm G 1 73°F 1016.6 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anderson, Anderson County Airport, SC3 mi51 minN 010.00 miFair69°F66°F90%1017.1 hPa
Clemson, Clemson-Oconee County Airport, SC17 mi53 minN 07.00 miFair69°F69°F100%1017.4 hPa
Pickens County Airport, SC24 mi52 minN 05.00 miFog/Mist62°F62°F100%1018.3 hPa

Wind History from AND (wind in knots)
Last 24hrNE3NE8E5NE7NE4E94CalmSE3SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmN3E5E53--5SE5NE9
2 days agoCalmSW3W5SW6W5W7W8W63W3SW3NW7N4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

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 Southeast    EDIT

Wind Forecast for Greenville-Spartanburg, SC (8,2,3,4)
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Ground Weather Radar Station Greer, SC
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weather_mapweather_map weather_map

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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.