Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Lake Norman of Catawba, NC

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 7:26AMSunset 5:44PM Wednesday January 24, 2018 2:20 AM EST (07:20 UTC) Moonrise 11:54AMMoonset 12:05AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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 Lake Norman of Catawba, NC
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location: 35.6, -80.98     debug


Area Discussion for - Greenville-Spartanburg, SC
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Fxus62 kgsp 240540
afdgsp
area forecast discussion
national weather service greenville-spartanburg sc
1240 am est Wed jan 24 2018

Synopsis
Dry high pressure will remain over the region persisting
into the start of the weekend. Another cold front will
bring rain to our area over the weekend, then high
pressure returns through mid week.

Near term through today
As of 1230 am est... No sigfnt changes made to the fcst. Windy conds
persist across the NRN nc mtns with some of the higher peaks
reaching 50+ mph. Expect these winds to continue thru the next
update with a gradual reduction arnd daybreak. No snow being
reported upstream within the llvl moisture field... Yet comp
radar is picking up periodic weak waves of likely flurries
reaching the nc tn border.

As of 1030 pm est... Not much seen at the moment on radar along
the tn border, but some upstream light returns suggest that it
is a good idea to have a small precip prob in that area. Winds
have increased, especially over the NRN mountains, so the wind
advisory also looks like a really good course of action. Other
than adjusting for temp trends, as temps are falling off slower
than expected, the fcst looks good.

Otherwise... An upper trough will continue to lift across the eastern
great lakes to the st. Lawrence valley tonight, pushing a cold
front well east of the area. Low-level flow should veer to nwly
thru this evening. As it does, sfc winds should diminish somewhat
and lose the strong gusts outside the mountains, but actually
pick up a bit in the high terrain. The current wind advisory for
the northern mountains thru 15z Wed looks good. The NW flow will
also bring a cloud deck up against the tn nc border areas, with
a few snow showers possible. Snow accums should be very light,
generally a dusting to up to half an inch. Other that those low
clouds, only a few wisps of cirrus are expected overnight. Temps
will return to near normal with lows in the 20s in the mtns and
lower to mid-30s across the piedmont.

Wednesday, sfc high pressure will build in from the west and should
bring in drier and dissipate the NW flow clouds and snow showers
by early aftn. Winds should be much lighter, especially east of the
mtns. Under sunny to mostly sunny skies, highs will be a category or
two below normal in the mtns and near normal in the piedmont. Highs
mainly in the 40s mtns and lower to mid-50s piedmont.

Short term tonight through Friday
As of 155 pm est Tuesday: heights rise through the period as a short
wave moves east of the area Wednesday night and a ridge axis builds
in by Friday. The last of the breezy conditions and NW upslope flow
clouds across the mountains come to an end Wednesday night as high
pressure builds in from the west. The center of the high moves
across the area Thursday then to our east Friday but high pressure
remains ridged into the area from the east. Lows a little below
normal Wednesday night rise to around normal Thursday night. Highs a
few degrees above normal Thursday rise to around 5 degrees above
normal for Friday.

Long term Friday night through Tuesday
As of 200 pm est Tuesday: the medium range forecast picks up Friday
night with the area under the waning influence of a surface high
centered off the east coast near bermuda. Surface winds will veer
around from the southeast ahead of an approaching upper trough and
surface cold front, gradually moistening the atmospheric column. On
Saturday, guidance disagrees somewhat on the onset of precipitation,
though some light rain in the normal favored upslope areas near the
blue ridge escarpment appears likely at this point, with isolated
precip in all other locations in the forecast area becoming more
likely as Saturday wears on. The bulk of the pre-frontal precip will
arrive on Sunday, with widespread showers expected across the entire
area. Forcing and shear will be quite good on Sunday afternoon, but
instability, especially surface-based instability, will be very
limited. Nonetheless, the front and upper trough will be dynamic
enough that this portion of the forecast should be watched closely
over the next few days. There is still some disagreement of the
exact evolution of the surface front and the potential for the
development of a gulf low on Sunday, so QPF is still in question,
though no major global model has particularly threatening weekend
rainfall totals at the moment.

Guidance remains in disagreement on the speed of the front as well,
though major models do agree that precip will come to an end by 12z
Monday morning, with the exception of some light lingering NW flow
snow. Temperatures will be almost 10 degrees above average ahead of
the front on Sunday before dropping to near average Monday through
the rest of the period after the frontal passage.

Aviation 06z Wednesday through Sunday
At clt and elsewhere,VFR conds thru the period as strong hipres
continues to build in from the west. There will be persistent
llvl stcu across the WRN nc mtns in moist mech lift... Which
could affect kavl this morning with tempoVFR cigs... Otherwise
expect only few sct mid upper clouds thru the period all sites.

Winds across the non mtn sites will remain moderate and
generally SW ly before veering NW ly aft 00z. At kavl... Expect
nw ly flow to continue with moderate gusts throughout the day.

Outlook: dry high pressure will dominate the area through the
remainder of the week. Another system will move in over the weekend,
bringing another round of -shra and restrictions.

Confidence table...

05-11z 11-17z 17-23z 23-00z
kclt low 56% high 100% high 100% high 100%
kgsp high 100% high 100% high 100% high 100%
kavl high 94% high 100% high 100% high 100%
khky high 100% med 78% high 100% high 100%
kgmu high 81% high 100% high 100% high 100%
kand high 100% 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
WATS1 - Lake Wateree, SC 89 mi51 min Calm G 1 44°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Statesville Municipal Airport, NC11 mi26 minN 010.00 miFair35°F26°F70%1017.3 hPa
Lincolnton, Lincolnton-Lincoln County Regional Airport, NC13 mi21 minW 510.00 miFair43°F27°F54%1017.6 hPa
Concord Regional Airport, NC20 mi16 minNW 310.00 miFair37°F28°F70%1018.3 hPa
Hickory, Hickory Regional Airport, NC24 mi28 minN 010.00 miFair39°F27°F62%1016 hPa

Wind History from SVH (wind in knots)
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Last 24hrSW8
G16
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G25
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NW7NW7NW6NW4W3W3W3CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3SW4SE5S6SE6SE4S3CalmCalmSE3SE6S7
G16
S6SE4S6
2 days agoCalmW3CalmNE3W3CalmCalmCalmCalmCalmCalmS4W6SE3S4CalmCalmCalmCalmCalmCalmCalmCalmCalm

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
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Greenville-Spartanburg, SC (2,6,7,8)
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Ground Weather Radar Station Greer, SC
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weather_mapweather_map weather_map

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Disclaimer:
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 L-36.com. 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 L-36.com 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.