Sunday, February17, 2019 L-36.com


Marine Weather and Tides
Awendaw, SC

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 6:59AMSunset 6:07PM Sunday February 17, 2019 9:23 PM EST (02:23 UTC) Moonrise 3:59PMMoonset 5:23AM Illumination 98% 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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AMZ330 Charleston Harbor- 533 Pm Est Sun Feb 17 2019
Tonight..E winds 5 kt, becoming sw after midnight. Patchy fog this evening, then areas of fog after midnight.
Mon..SW winds 10 kt, becoming nw in the afternoon. Areas of fog in the morning. A slight chance of showers.
Mon night..N winds 5 to 10 kt, becoming ne 10 to 15 kt with gusts to 20 kt after midnight.
Tue..NE winds 15 kt with gusts to 20 kt. A chance of showers in the afternoon.
Tue night..NE winds 10 to 15 kt with gusts to 20 kt. Showers likely.
Wed..E winds 10 kt, becoming S in the afternoon. Showers likely.
Wed night..S winds 5 to 10 kt. A chance of showers.
Thu..SW winds 10 to 15 kt. A slight chance of showers.
Thu night..S winds 5 to 10 kt. A chance of showers.
Fri..SE winds 5 to 10 kt. A chance of showers.
Fri night..E winds 5 to 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 57 degrees.
AMZ300 533 Pm Est Sun Feb 17 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. An unsettled pattern is expected as a series of frontal systems affect the area through next weekend.


7 Day Forecast for Marine Location Near Awendaw, SC
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location: 32.94, -79.68     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 172320
afdchs
area forecast discussion
national weather service charleston sc
620 pm est Sun feb 17 2019

Synopsis
An unsettled pattern is expected as a series of frontal systems
affect the area through next weekend.

Near term until 6 am Monday morning
17 23z surface observations show the warm front across southeast
georgia is beginning to move north. The front should pick up
speed over the next few hours as surface pressures continue to
fall across the interior and to the north. Nighttime lows (6pm-
6am) will occur over the next few hours before temperatures
begin to rise in the wake of the warm front. Expect temperatures
to be in the mid-upper 60s by daybreak Monday. Sea fog
developing off the georgia and far southern south carolina coast
will continue to expand over the coastal waters this evening.

Some of this could propagate inland across the coastal counties
as the warm front lifts north and winds turn more southerly. In
fact, there are signals some degree of sea fog could reach as
far inland as walterboro and moncks corner by late evening
before wind fields begin to pick up in response to strengthening
low-level jetting ahead of the approaching cold front. Any
inland dense fog should retreat back to the immediate coast
during the early morning hours Monday and there could be very
little in the way of significant fog over land by daybreak.

Short term 6 am Monday morning through Wednesday
Monday: a weak cold front will be pushing through the area during
the morning, then offshore by afternoon. Moisture and large scale
forcing seem to be diminishing as this front pushes through.

Therefore, have maintained only low end chance pops for light
precipitation amounts. Despite the front moving through, high
temperatures are still expected to be quite mild, around 70, likely
helped by a little downslope flow.

Monday night: a strong wedge of high pressure develops north of the
area with increasing northeast low level winds. Deep layer moisture
begins to return overrun the cooler low level airmass late, but only
have slight chance pops by late night south of the savannah river.

Lows relatively mild, in the mid to upper 40s north and lower 50s
south.

Tuesday: a strong wedge of high pressure looks to hold north and
east of the area with northeast early, to east-northeast winds late.

Deep layer moisture continues to move northward and overrun the
lower level cooler air, while a weak coastal trough tries to develop
over the atlantic waters. Models continue to differ a bit on precip.

Chances, but have continued a slow trend upward from slight chance
to chance pops during the afternoon. Best chances expected to be
well inland and over the near shore waters in the coastal trough.

Highs expected to remain cool, in the mid 50s north to around 60
south.

Tuesday night and Wednesday: the surface wedge pushes off to the
northeast as a weak surface low pass well to the northwest. Deep
layer moisture and some upper level forcing should result in
scattered to numerous light showers, likely decreasing later in the
day on Wednesday. Temperatures Tuesday night in the mid to upper 40s
inland, warming to mid to upper 60s north and lower to mid 70s south
on Wednesday.

Long term Wednesday night through Sunday
The warm front will linger north of the area Wednesday night
through Friday while a series of upper shortwaves move through.

Isolated to scattered showers will remain possible. Temps will
be 10-15 degrees above normal due to strong warm air advection.

A cold front might sweep through late in the weekend.

Aviation 00z Monday through Friday
Kchs: ifr CIGS will could improve if low-end MVFR by 05z as a
warm front lifts north. Risk for ifr CIGS will still be present,
however. Will carry prevailing ifr through 05z, then tempo ifr
09-12z. FROPA looks to occur at 15z and could be accompanied by
a band of light rain.VFR will return by early afternoon Monday.

Ksav: low CIGS will persist for much of the night. Watching an
area of sea fog off the coast. There are signals some of this
could spread inland and impact the terminal over the next few
hours. Could see vsbys drop as 2 miles before visibilities
improve. CIGS should rise to MVFR around daybreak as a cold
front approaches. FROPA looks to occur at 15z and could be
accompanied by a band of light rain.VFR will return by early
afternoon Monday.

Extended aviation outlook:
Monday: mainlyVFR expected.

Late Monday night through early Wednesday: periods of flight
restrictions, mainly due to low CIGS and possibly lower vsbys with
fog.

Wednesday night through Friday: a return to mainlyVFR conditions
expected.

Marine
Tonight: sea fog has rapidly developed off the georgia and far
southern south carolina where coastal webcams show vsbys have
dropped below 1 nm. A marine dense fog advisory has been issued
for the georgia and beaufort county nearshore zones through 1
am. The sea fog should expand up into the charleston county
waters and charleston harbor later this evening and an expansion
of the advisory appears likely. Winds should increase after
midnight as low-level jetting intensifies ahead of an
approaching cold front. It is unclear how much fog will persist
overnight, but given the stable conditions within 10 nm or the
coast, the risk for dense fog could linger beyond 1 am.

Monday: no highlights expected as a weak cold front pushes through
the waters. Winds southwest at 15 to 20 knots ahead of the front in
the morning, veering to northwest 15 knots in the afternoon. Seas 3
to 4 feet, highest beyond 20 nm.

Monday night through Tuesday night: small craft advisory conditions
expected as a strong high pressure builds north of the waters.

Sustained northeast winds will likely increase to around 20 knots
with gusts of 25 to 30 knots, with seas building to 5 to 9 feet,
highest offshore. Winds may decrease to 15 to 20 knots later Tuesday
night, but seas are expected to remain at advisory levels.

Wednesday and Thursday: winds and seas are expected to fall below
advisory levels as the surface ridge pushes farther northeast and
the low level flow veers to east-southeast on Wednesday and
Wednesday night, then south-southwest on Thursday.

Sea fog: conditions may become favorable for more sea fog Wednesday
night and Thursday as the low level flow become southerly, which
will help to advect warmer, more moist air northward.

Tides coastal flooding
Tide levels may reach marginal coastal flood advisory levels during
the Monday morning high tide, but winds will not be favorable, then
they will be parallel to the coast then offshore by afternoon. By
Tuesday and Wednesday, the low level flow is still expected to
increase from the northeast, strongest on Tuesday. Tide guidance is
still indicating coastal flood advisory conditions for both Tuesday
and Wednesday, mainly for the morning high tides.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Dense fog advisory until 1 am est Monday for amz352-354.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41029 - Capers Nearshore (CAP 2) 10 mi76 min ENE 9.7 G 12 55°F 57°F1015.6 hPa
CHTS1 17 mi36 min E 5.1 G 7 55°F 57°F1015.5 hPa
FBIS1 - Folly Island, SC 21 mi84 min E 8 G 8.9 55°F 1015.9 hPa (+0.3)55°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi99 min ENE 6 51°F 1015 hPa49°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi34 min NNE 5.8 G 7.8 71°F4 ft1016 hPa
ACXS1 - ACE Basin Reserve, SC 49 mi99 min ESE 1.9 57°F 1015 hPa56°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Pleasant Regional-Faison Field, SC6 mi29 minN 05.00 miFog/Mist55°F53°F94%1015.6 hPa
Charleston, Charleston Air Force Base, SC19 mi88 minSE 87.00 miOvercast56°F54°F93%1015.1 hPa
Charleston Executive Airport, SC24 mi29 minN 03.00 miFog/Mist55°F55°F100%1015.6 hPa

Wind History from LRO (wind in knots)
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Last 24hrN3NE4CalmNE3NE4N4CalmCalmCalmE4CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmE4CalmSE3
1 day agoCalmCalmCalmCalmCalmS3SW6S6S7SW9S6S8SW10SW10
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2 days agoCalmCalmCalmS4CalmW3SW4CalmCalmCalmCalmW4W4S9S8
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Tide / Current Tables for Moores Landing, ICWW, Sewee Bay, South Carolina
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Moores Landing
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Sun -- 05:22 AM EST     Moonset
Sun -- 05:59 AM EST     5.83 feet High Tide
Sun -- 07:00 AM EST     Sunrise
Sun -- 12:20 PM EST     -0.30 feet Low Tide
Sun -- 03:58 PM EST     Moonrise
Sun -- 06:05 PM EST     Sunset
Sun -- 06:26 PM EST     4.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.50.21.63.24.65.55.85.54.53.11.70.4-0.2-0.10.82.13.34.34.94.94.12.91.40.1

Tide / Current Tables for Charleston Harbor, off Fort Sumter, South Carolina Current (expired 1996-12-31)
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Charleston Harbor
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Sun -- 12:14 AM EST     0.00 knots Slack
Sun -- 03:04 AM EST     2.65 knots Max Flood
Sun -- 05:22 AM EST     Moonset
Sun -- 06:37 AM EST     -0.01 knots Slack
Sun -- 07:00 AM EST     Sunrise
Sun -- 09:43 AM EST     -2.88 knots Max Ebb
Sun -- 01:07 PM EST     0.00 knots Slack
Sun -- 03:37 PM EST     2.14 knots Max Flood
Sun -- 04:00 PM EST     Moonrise
Sun -- 06:06 PM EST     Sunset
Sun -- 06:50 PM EST     -0.00 knots Slack
Sun -- 09:56 PM EST     -2.86 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.31.12.22.62.41.80.8-0.5-1.9-2.7-2.9-2.4-1.5-0.21.222.11.70.9-0.2-1.5-2.5-2.9-2.5

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 Charleston, SC (21,6,7,8)
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Ground Weather Radar Station Charleston, SC
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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.