Friday, September21, 2018

Marine Weather and Tides
Hemby Bridge, NC

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9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 7:09AMSunset 7:21PM Friday September 21, 2018 11:40 AM EDT (15:40 UTC) Moonrise 4:47PMMoonset 2:45AM Illumination 89% Phase: Waxing Gibbous; Moon at 12 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 Hemby Bridge, NC
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location: 35.11, -80.62     debug

Area Discussion for - Greenville-Spartanburg, SC
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Fxus62 kgsp 211435
area forecast discussion
national weather service greenville-spartanburg sc
1035 am edt Fri sep 21 2018

High pressure will weaken and move east of the area through
Saturday. A weak, yet moist, cold front will then advance from the
north Sunday before moving back north on Tuesday. A stronger cold
front is forecast to push into the forecast area on Wednesday.

Near term through tonight
As of 1035 am edt Friday: quiet across the fcst area. Low clouds
and fog cleared out across many areas a bit faster than expected.

Although latest visible satellite indicated a SW to NE band of
stratocu is making a comeback across SE portions of the fa. Tweaked
the forecast, mainly to adjust sky coverage to match current trends.

A large upper anticyclone ridge centered over the carolinas this
morning will gradually get pushed offshore and flattened through
tonight as a strong short wave trof traverses the upper midwest and
great lakes regions. This wave will help to push a cold front toward
the region, but the front is expected to get strung out across
the ohio valley region. As a result, no significant changes are
expected to our weather today as deep convection should continue to
be suppressed by warm air aloft. Only the differential heating over
the ridgetops will be able to overcome the convective inhibition, so
we will retain the precip chances over the high elevations. Thunder
is not very likely, and severe weather chances are practically
nil. This activity should draw to a close with sunset, with more
fair weather thru Friday night. Temps will be seasonally warm.

Short term Saturday through Sunday night
As of 200 am edt Friday: the short range pattern over the weekend
remains rather progressive as a cold front advances toward the fa
sat and then a moist wedge builds in sun. The atmos will remain
quite moist and warm in the llvls Sat which will allow for mtn top
convg -shra tstms. Not expecting anything outside of general thunder
with these storms as an ulvl ridge remain in control and warms the
mlvls. A strong cp sfc high will build quickly east across the
glakes region Sat night and begin ridging down east of the apps thru
the morning. By midday sun... The wedge bndry shud be located near
the sc nc line and good sfc convg will allow for some stronger tstms
developing along a line from hendersonville toward monroe. The
timing with the exact placement of the sfc bndry will likely change
but Sun afternoon and evening could see more widespread activity
across the nc zones. Temps will remain abv normal by a couple cats
sat in continued S ly flow. On sun... Expect a drop off in MAX temps
with increased cloudiness and an airmass mix across the NE rn
portion of the fa... While the upstate and NE ga remain a little abv

Long term Monday through Thursday
As of 225 am edt Friday: not too many changes were made to the
going fcst. The op models are in decent agreement with a moist wedge
persisting across the fa Mon into Tue before a cold front pushes in
wed and becomes stationary as it encounters strong atl ridging. This
shud lead to active weather with sct showers and tstms most locales
early on becoming more widespread by wed. So... Have maintained low
chance pops into Tue with higher end chances beginning wed. The
atmos will be rather stable early in the period... But conditional
moderate instability will likely be realized Wed with the llvl convg
zone pushing in. So... Some stronger and deeper convec cells are
possible into thu. MAX temps will begin the period below normal in a
moist llvl wedge and slowly modify to arnd normal thru the week.

Aviation 15z Friday through Tuesday
At kclt and elsewhere: well, it looks like we will have mostly
an MVFR ceiling restriction this morning, rather than the fog
restriction suggested by earlier guidance. Satellite imagery shows
an expanding area of stratocu with cloud bases around 025 with
another layer around 060. The conditional climo suggests the low
cloud ceiling may stick around to 14z to 16z before lifting and
scattering. After that happens, expectVFR conditions for the rest
of the period with a S SW wind. Deep convection should be tied
to the ridgetops this afternoon, thus only a vcsh was included
at kavl.VFR is expected most of Friday night with another fog
restriction possible around daybreak on Saturday.

Outlook: anticipate diurnal showers and thunderstorms to become more
widespread this weekend with possible brief restrictions. Otherwise,
expectVFR conditions with the exception of possible overnight and
early morning fog focused predominately across the mountain valleys.

Confidence table...

14-20z 20-02z 02-08z 08-12z
kclt high 80% high 100% high 100% high 95%
kgsp high 100% high 100% high 100% high 95%
kavl high 100% high 100% high 100% high 91%
khky high 97% high 100% high 100% high 100%
kgmu high 100% high 100% high 100% high 95%
kand high 100% high 100% high 100% high 95%
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
WATS1 - Lake Wateree, SC 54 mi71 min SE 1.9 G 4.1 80°F
LMFS1 - Lake Murray SC 77 mi81 min Calm G 1.9 80°F 1022.4 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monroe, Monroe Airport, NC6 mi1.8 hrsVar 310.00 miOvercast77°F71°F82%1023.8 hPa
Charlotte, Charlotte / Douglas International Airport, NC18 mi1.8 hrsWSW 56.00 miPartly Cloudy with Haze77°F72°F85%1023.4 hPa
Concord Regional Airport, NC20 mi1.8 hrsWNW 47.00 miMostly Cloudy79°F71°F79%1025.1 hPa

Wind History from EQY (wind in knots)
Last 24hr34NE53CalmCalm3CalmCalmCalmCalmCalm53CalmS3CalmCalmCalmCalmCalmCalm3Calm
1 day agoN6N9N9N10N8N3NE4NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3Calm
2 days ago----------------------------------------------N8

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.
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Wind Forecast for Greenville-Spartanburg, SC (11,2,3,4)
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Ground Weather Radar Station Columbia, 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.