Monday, March18, 2019

Marine Weather and Tides
Charlotte, NC

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:28AMSunset 7:34PM Monday March 18, 2019 9:26 PM EDT (01:26 UTC) Moonrise 3:57PMMoonset 5:03AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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 Charlotte, NC
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location: 35.21, -80.83     debug

Area Discussion for - Greenville-Spartanburg, SC
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Fxus62 kgsp 182357
area forecast discussion
national weather service greenville-spartanburg sc
757 pm edt Mon mar 18 2019

Expect dry conditions this week with below normal temperatures
into mid week, then a warming trend into the weekend. The weather
becomes a little more active next week.

Near term through Tuesday
As of 740 pm: little change needed to the fcst. Bumped up sky cover
a tad to reflect cirrus shield streaming across the area. But these
clouds are quite thin, so should have little impact, if any, on
temps, which look on track.

Otherwise, dry low level high pressure will continue building into
the region through the near term, in the wake of a mid-level short
wave trough that is currently passing north of the area with very
little fanfare. Dry and clear conditions tonight will allow for good
radiational cooling conditions in most areas, although portions of
the piedmont may remain lightly mixed due to a slightly tighter
surface gradient. Min temps are expected to range from 5-10 degrees
below climo, with freezing temps expected across the mtns as well as
the foothills and northern piedmont of nc. Dry and unseasonably cool
conditions continue into Tuesday, with cooling NE flow expected to
support MAX temps several degrees cooler than today's readings, or
around 10 degrees below normal.

Short term Tuesday night through Thursday
As of 235 pm edt Monday: the short-term fcst picks up at 00z on
Wednesday with broad upper trofing over the NE CONUS and weak
upper ridging over the sw. During the next 24 to 48hrs, the upper
trof will amplify over the great lakes and move the trof axis
over the cwfa by the end of the period late Thursday. At the sfc,
broad and dry high pressure will be centered to our NE as the
period begins. By late Wed early thurs, the high will have moved
farther offshore as a weak cold front approaches the fcst area
from the west. At the same time, some sort of meso-low tries to
spin up just off the SE coast, however it's unclear exactly where
it will be centered and how strong it will become. The cold front
will move thru the cwfa on thurs without too much fanfare. There
is some deeper moisture out ahead of it, but not that much. In
its wake, very broad high pressure will spread back over the
region. Wed should be dry with some slight chance to chance pops
over the mtns and foothills as the front moves thru. Any precip
that does materialize should be minimal. It may be cold enough
over the highest peaks to get some snow flurries early thurs,
but no accumulations are expected. Temps will start out below
normal and warm to near normal by Friday.

Long term Thursday night through Monday
As of 225 pm edt Monday: the extended fcst picks up at 00z on
Friday with deep upper trofing centered just to our east and
upper ridging to our west. The long-range models indicate that
the trof will get reinforced during the day on Friday and then
move offshore on sat. As it does, heights will recover as the
upper ridge slides farther east. By Sunday afternoon evening
the ridge axis is expected to be centered over the fcst area.

For the remainder of the period, heights will slowly fall as
the ridge deamplifies and another upper trof approaches the
southeast from the west. At the sfc, very broad and dry high
pressure will spread over the region on Friday and remain in
place thru most of the weekend. By late Sunday, the center of
the high will be moving off the SE coast as light sly low-lvl
flow returns to the fcst area. As for the sensible wx, no major
changes were needed to the fcst with dry conditions thru the
weekend and pops ramping up on Monday as deeper moisture returns
to the region. Temps will start out near normal on Friday and
warm thru the period.

Aviation 00z Tuesday through Saturday
At kclt and elsewhere: the center of dry high pressure will
slowly drift east across the ohio valley and central appalachians
thru the period, keeping all sitesVFR and turning winds around out
of the ne. Little change in conditions results in short tafs. Cannot
rule out a few low-end gusts in the 14-17z time frame, mainly across
the upstate, but otherwise winds will be in the 5-10 kt range thru
the period. Once the last of the high-based CU dissipates early this
evening, the only clouds expected are thin cirrus thru the overnight.

Outlook: dry weather continues thru at least midweek. A front
approaches from the west, and a weak low develops along the nc
coast. These features may bring some increased clouds and a small
chance of precip. But overall, a prolonged period ofVFR conditions
is expected thru the end of the week.

Confidence table...

00-06z 06-12z 12-18z 18-00z
kclt high 100% high 100% high 100% high 100%
kgsp high 100% high 100% high 100% high 100%
kavl high 100% high 100% high 100% high 100%
khky high 100% high 100% high 100% high 100%
kgmu high 100% 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 61 mi57 min N 5.1 G 8.9 55°F
LMFS1 - Lake Murray SC 80 mi67 min N 2.9 G 6 56°F 1022 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charlotte, Charlotte / Douglas International Airport, NC6 mi35 minN 910.00 miMostly Cloudy46°F15°F29%1025.9 hPa
Concord Regional Airport, NC14 mi97 minN 8 G 1510.00 miFair48°F17°F29%1025.4 hPa
Gastonia Municipal Airport, NC17 mi33 minN 910.00 miFair50°F12°F22%1025.7 hPa
Monroe, Monroe Airport, NC17 mi34 minNNE 910.00 miFair50°F15°F25%1026.5 hPa
Rock Hill, Rock Hill - York County Airport, SC20 mi33 minNNE 11 G 1410.00 miFair49°F18°F29%1025.5 hPa

Wind History from CLT (wind in knots)
Last 24hrS5CalmN5CalmS3SE3SE3NW9NW3N5NW4NW4N9N11NW8N10
1 day agoW3NW4N3N6N5N6N5N3N8N7N7N8NE12NE9
2 days agoSW7W6NW3NW5NW9NW13

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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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 (21,6,7,8)
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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.