Thursday, November22, 2018 L-36.com


Marine Weather and Tides
Folly Beach, 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 6:55AMSunset 5:16PM Thursday November 22, 2018 6:48 AM EST (11:48 UTC) Moonrise 5:15PMMoonset 6:03AM Illumination 100% Phase: Full Moon; Moon at 14 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
    EDIT      (on/off)   Help
AMZ330 Charleston Harbor- 314 Am Est Thu Nov 22 2018
.small craft advisory in effect from this evening through Friday afternoon...
Today..NE winds 5 to 10 kt early, increasing to 15 kt with gusts to 20 kt this afternoon.
Tonight..NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Waves 2 to 3 ft.
Fri..NE winds 20 to 25 kt, diminishing to 15 kt in the afternoon. Waves 2 to 3 ft. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Fri night..E winds 10 to 15 kt. Showers likely.
Sat..SE winds 10 kt, becoming sw in the afternoon. Showers likely with a slight chance of tstms.
Sat night..NW winds 5 kt.
Sun..NE winds 5 kt.
Sun night..SW winds 5 to 10 kt. A chance of showers.
Mon..W winds 10 to 15 kt. A slight chance of showers.
Mon night..W winds 10 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 62 degrees.
AMZ300 314 Am Est Thu Nov 22 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through Friday, then a low pressure system will move through on Saturday. A cold front will move through Sunday night followed by high pressure into the middle of next week.


7 Day Forecast for Marine Location Near Folly Beach, SC
   Hourly   EDIT   Help
location: 32.66, -79.92     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 220912
afdchs
area forecast discussion
national weather service charleston sc
412 am est Thu nov 22 2018

Synopsis
High pressure will prevail through Friday, then a low pressure
system will move through on Saturday. A cold front will move
through Sunday night followed by high pressure into the middle
of next week.

Near term through tonight
Pre-dawn: inland areas adjacent to the csra sc midlands and
across the inland charleston quad-county area likely to see
patchy areas of frost; we have a frost advisory for a few zones
that expires at 8 am. Most areas have seen calm winds overnight
but we expect some light north breezes to develop near dawn as
the gradient tightens from high pressure building north of the
region. Other than a few high clouds, skies will remain clear
through dawn.

Today: high pressure will be the dominant force over the eastern
seaboard today with the center of the high sliding southeast
over the eastern great lakes, wedging southward to the lee of
the mountains over ga and sc. The resident air mass well to our
north is extremely cold but across our region, progged low level
thickness values and abundant sunshine should result in high
temps ranging from a few upper 50s well north to mid 60s over
our southern ga zones southwest of savannah. It will feel a
cooler thanks to northeast winds increasing to 10 to 15 mph
today, becoming breezier still on the beaches and barrier
islands.

Tonight: strong surface wedging over the region will develop
with a tight nocturnal gradient developing as the cold high to
the north digs in. Freezing temps are not expected to make it
into northern inland zones, confined to the sc pee dee north.

The weather will remain dry, although we think stratocumulus
clouds will expand into coastal zones overnight as isentropic
ascent increases and moisture increases below the wedge and
subsidence inversion. Overall, temps tonight will be similar
to Thursday but frost potential should be negated by the
increase in winds overnight.

Short term Friday through Sunday
Coastal troughing will become more pronounced through the day Friday
as high pressure becomes more wedge-like inland. In response,
precipitation chances will first expand primarily across coastal
waters but then activity is expected to shift towards land zones as
the trough axis slides towards the coast late and low pressure
approaches from the west-southwest. Rain chances then greatly
increase overnight Friday into Saturday morning with widespread
shower activity expected in proximity to the low. As the low departs
to the northeast, shower activity will decline through the day. A
noticeably drier atmospheric column in place for much of Sunday
indicates relatively dry conditions in advance of the next cold
front.

Long term Sunday night through Wednesday
An upstream phase-locked low pressure system will transit northeast
near the great lakes region, pulling gulf moisture well inland and
supporting an additional period of elevated pops Sunday night into
early Monday as a cold front crosses the forecast area. Drier high
pressure is then expected to persist into mid-next-week.

Aviation 08z Thursday through Monday
Vfr at ksav kchs through 06z Friday.

Extended aviation outlook: flight restrictions become increasingly
likely Friday through Saturday as low pressure impacts the area.

Surface conditions look to improve Sunday but brief flight
restrictions will be possible overnight Sunday into Monday as a cold
front crosses the region.VFR conditions are then expected to
prevail at both terminals into mid-next-week.

Marine
We will see winds and seas building over the waters today as
strong cold surface high pressure builds into new england and
then wedges down the east coast into ga and the carolinas. We
have small craft advisories going into effect today with more
significant conditions anticipated later tonight into Friday
morning. We have hoisted a gale watch for all near and offshore
waters from this evening into Friday afternoon. Very tight
thermal and moisture gradients are expected to develop with
1000 mb geostrophic flow increasing to 45-50 kt over the waters.

Winds will build to 25-30 kt with frequent gusts to 35 kt
developing overnight into Friday morning. Seas will build to
at least 6-8 ft near shore and 9-11 ft offshore.

High surf: we will monitor for the potential of a high surf
advisory as this marine event unfolds later today and tonight.

Some beach erosion is possible given the favorable tidal cycles
and anomalies.

A continuing tight surface pressure gradient will lead to a
prolonged period of small craft advisory conditions over the coastal
waters. Furthermore, gusts to gale strength look increasingly likely
and the gale watch continues through mid-Friday-morning. While winds
will slowly subside through the day Friday, falling below small
craft advisory levels by late Friday night or early Saturday
morning, seas will not fall below advisory levels until late
Saturday into early Sunday. Another round of small craft advisories
will be possible Monday as a cold front crosses the waters.

Tides coastal flooding
We have issued an advisory for shallow coastal flooding along
the sc coast and particularly in downtown charleston with the
upcoming high tide early this morning. Tide levels at fort
pulaski ga may approach advisory criteria but our latest
forecast fell just short.

Strong northeast winds tonight through Friday combined with
increasing astronomical effects will likely result in minor to
moderate coastal flooding with the morning high tides Friday
through Saturday. Additional coastal flood advisories are
expected.

Chs watches warnings advisories
Ga... Frost advisory until 8 am est this morning for gaz087-088.

Sc... Frost advisory until 8 am est this morning for scz040.

Coastal flood advisory until 9 am est this morning for
scz048>050.

Marine... Gale watch from this evening through Friday afternoon for
amz350-352-354-374.

Small craft advisory from 7 am this morning to 10 pm est this
evening for amz350-352-354-374.

Small craft advisory from 10 pm this evening to 4 pm est
Friday for amz330.

Near term...

short term... Jmc
long term... Jmc
aviation... Jmc
marine... Jmc
tides coastal flooding...



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FBIS1 - Folly Island, SC 2 mi48 min NNE 16 G 19 51°F 1025.2 hPa (+0.6)40°F
CHTS1 8 mi48 min NNW 6 G 12 50°F 62°F1025 hPa (+0.5)
41029 - Capers Nearshore (CAP 2) 19 mi40 min NNE 19 G 25 55°F 63°F1023.4 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi63 min N 1.9 44°F 1025 hPa40°F
41033 37 mi40 min Calm G 0
41004 - EDISTO - 41 NM Southeast of Charleston, SC 45 mi38 min NNE 19 G 23 77°F1023.8 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
N6
G11
N7
G12
N6
G11
N4
G8
N4
N4
G7
N4
N5
G8
N5
G10
N6
G10
N7
G10
NW5
NW5
NW5
NW3
N4
NW4
W2
NW3
NW2
NW4
N6
G9
N5
G9
NW6
G12
1 day
ago
W6
W6
G10
W4
G7
W7
NW4
G8
NW6
G11
W6
G9
SW4
G7
SW5
SW4
SW4
SW3
W3
NW3
W2
W4
W5
G9
NW5
G8
N6
N9
N10
G15
N6
G11
N6
G10
N7
G13
2 days
ago
NW5
NW4
G7
NW4
NW7
N4
G8
N6
G9
NW8
G11
NW7
W3
G8
W5
G8
--
NW2
G6
NW2
N1
S2
SW2
SW4
W4
SW4
SW3
W5
W4
W3
W6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC5 mi53 minN 06.00 miFair with Haze45°F41°F87%1025.1 hPa
Mount Pleasant Regional-Faison Field, SC18 mi73 minN 410.00 miFair43°F39°F87%1025.4 hPa
Charleston, Charleston Air Force Base, SC18 mi1.9 hrsNNE 48.00 miA Few Clouds42°F39°F92%1024.8 hPa

Wind History from CHS (wind in knots)
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last 24hrNE6N7NE7NE5N634N8N10NE10N4N4N5N6N4N3NW4N3CalmN3CalmN4N4NE7
1 day agoW5W6W5W6W4W7W6W6W7SW5SW5W3W3W3CalmW3NW6N6NE9NE7NE9N6N6N7
2 days agoNW5CalmN5N5N7NW6N7W9W7W6NW7NW4CalmCalmCalmSW3SW5SW7W4SW3W3W4W3W5

Tide / Current Tables for Folly Island (outer coast), South Carolina
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Folly Island (outer coast)
Click for Map
Thu -- 12:25 AM EST     -0.07 feet Low Tide
Thu -- 06:03 AM EST     Moonset
Thu -- 06:43 AM EST     6.24 feet High Tide
Thu -- 06:55 AM EST     Sunrise
Thu -- 01:00 PM EST     0.19 feet Low Tide
Thu -- 05:14 PM EST     Moonrise
Thu -- 05:15 PM EST     Sunset
Thu -- 07:03 PM EST     5.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
00.112.54.15.36.16.25.74.53.11.70.60.20.61.73.14.35.15.45.14.22.91.5

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Thu -- 01:08 AM EST     0.00 knots Slack
Thu -- 03:42 AM EST     2.03 knots Max Flood
Thu -- 06:03 AM EST     Moonset
Thu -- 06:55 AM EST     Sunrise
Thu -- 07:29 AM EST     -0.00 knots Slack
Thu -- 10:43 AM EST     -2.75 knots Max Ebb
Thu -- 01:47 PM EST     0.00 knots Slack
Thu -- 04:06 PM EST     1.77 knots Max Flood
Thu -- 05:14 PM EST     Moonrise
Thu -- 05:15 PM EST     Sunset
Thu -- 07:39 PM EST     -0.00 knots Slack
Thu -- 10:55 PM EST     -2.64 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-1.3-0.211.821.71.20.5-0.6-1.8-2.5-2.7-2.1-10.21.31.81.51.10.6-0.4-1.5-2.3-2.6

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of Southeast    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Charleston, SC
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.