Saturday, August17, 2019 L-36.com


Marine Weather and Tides
Folly Beach, SC

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:43AMSunset 8:04PM Saturday August 17, 2019 9:41 AM EDT (13:41 UTC) Moonrise 8:34PMMoonset 7:28AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 922 Am Edt Sat Aug 17 2019
Rest of today..SW winds 15 kt, increasing to 15 to 20 kt. Waves 1 to 2 ft. Showers and tstms. Rain heavy at times with vsby 1 nm or less.
Tonight..SW winds 5 to 10 kt. Showers and tstms likely, mainly in the evening.
Sun..SW winds 5 to 10 kt. A chance of showers and tstms.
Sun night..SW winds 5 to 10 kt. A chance of showers and tstms.
Mon..S winds 5 to 10 kt. A chance of showers and tstms.
Mon night..S winds 5 to 10 kt. A chance of showers and tstms.
Tue..S winds 5 to 10 kt. A chance of showers and tstms.
Tue night..S winds 5 to 10 kt. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. A chance of showers and tstms.
Wed night..S winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 87 degrees.
AMZ300 922 Am Edt Sat Aug 17 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak low pressure system will track northeast along the georgia and south carolina coast today. A stationary front will linger nearby through Sunday. Atlantic high pressure and an inland trough will then prevail through much of the 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 171150
afdchs
area forecast discussion
national weather service charleston sc
750 am edt Sat aug 17 2019

Synopsis
A weak low pressure system will track northeast along the
georgia and south carolina coast today. A stationary front will
linger nearby through Sunday. Atlantic high pressure and an
inland trough will then prevail through much of the week.

Near term through tonight
As of 740 am: kclx clearly indicated a mesolow just off of
hilton head island, tracking north. Convection associated with
the mesolow has strengthen sharply over the past hour, cloud top
temperatures cooling to -72c. Based on satellite and radar
trends, this feature should track over fripp island and moving
onshore near edisto island by 9 am. Pops will increase through
this morning and afternoon, reaching cate values.

As of 410 am: IR satellite indicated a disorganized area of
convection over northern fl, regional radar appeared to show
slight cyclonic circulation. Water vapor products show a band
of tropical moisture extending from the gulf of mexico NE along
and east of the of the ga and carolina coast. SPC mesoscale
analysis indicated SBCAPE over the coastal counties and adjacent
waters between 2500-3000 j kg. Showers and thunderstorms
sourced over the marine zones should continue to track over the
coastal areas early this morning. After sunrise, convection
should readily develop over the coastal counties with a lfc
around 2 kft. Convection should increase inland by early this
afternoon as temps peak in the low 90s with dewpoints in the mid
70s. Near term guidance generally agrees that a weak low
pressure system will track northeast across the coastal plain of
ga and sc, passing during peak heating. The environment this
afternoon will feature moderate instability, pw between 2.3-2.5
inches, and weak shear. As the low approaches from the sw,
coverage of thunderstorms should steadily increase, primarily
over the sc lowcountry. These storms should produce periods of
torrential downpours, in fact, GFS forecast soundings indicate
k-index around 40 at kchs this afternoon. Given the possibility
of cell mergers and or back building, I will add a mention of
heavy rain along the coastal counties of sc today. Href
highlights the chs tri-county with a 40 percent chance of 3 hr
of 3 inch rainfall at any given point within a 40 km radius at
21z. This placement and timing of the href agrees well with the
latest run of the hrrr. I will mention the potential for heavy
rain the hwo for the sc coast for today. Fortunately, it appears
that the period of greatest rainfall potential will overlap
with low tide during the mid to late afternoon.

This evening and tonight, the weak low pressure is forecast to
lift north of the forecast area. As the low departs, drier air
should arrive from the west, shifting the deep convection
gradually east. However, given weak flow across the area, I will
keep schc to chc pops through the overnight hours. Low
temperatures are forecast to range from the low 70s inland to
the mid to upper 70s near the beaches.

Short term Sunday through Tuesday
Moderate confidence this period. A stalled front inland will
eventually dissipate late in the period while weak upper troughing
lingers across the area. We maintained above normal rain chances,
especially Saturday. With pwats around 2.0 inches most of the time
and forcing from some upper level energy and mesoscale boundaries
like the sea breeze, we think rain chances will generally be higher
than normal, mainly during the afternoon evening. Given the deep
moisture and light low-mid level winds there will be at least a
small risk of localized heavy rain flooding but not expecting
anything much more significant than the norm. Also can't completely
rule out isolated severe storms each day but conditions aren't that
favorable for much severe weather. Temperatures should be near to
above normal.

Long term Tuesday night through Friday
Moderate confidence this period. High pressure will linger to the
east with low pressure inland. We generally expect a fairly typical
summertime pattern with mainly afternoon evening scattered showers
and thunderstorms, although the some showers and storms could
persist overnight depending on the placement strength of the upper
level low. An approaching cold front late in the week could lead to
better rain chances but confidence is low in any significant impacts
at this point. Temperatures should remain near or above normal.

Aviation 12z Saturday through Wednesday
Deep moisture will remain across the terminals through the 12z
taf period. A weak low pressure system is forecast to track ne
along the coast through the daylight hours today. Early this
morning, MOS and forecast soundings indicate that restrictive
ceilings will remain across the ksav until mid-morning.

Convection should readily develop today ahead of the approaching
low pressure, with the greatest coverage near kchs. I will
highlight the convection with fm groups and tempos. By this
evening, the low is expected to track NE of the forecast area,
convection should decrease through this evening.

Extended aviation outlook: periodic restrictions from mainly
afternoon evening showers and thunderstorms expected at
kchs ksav through mid week.

Marine
The pressure gradient across the marine zones will tighten today
as weak low pressure track NE over the coastal plain of ga and
sc. As a result, SW winds will increase during the daylight
hours, with gusts around 25 kts across the charleston co.

Nearshore waters and the outer ga waters. Wave heights are
forecast to build to 3-5 ft, with 6 ft expected 50 nm and
beyond. A small craft advisory is in effect until 9 pm for
amz350 and amz374. Thunderstorms will remain common across the
marine zones today into late tonight, greatest coverage across
the nearshore sc waters. Wind and wave conditions will improve
slightly tonight as the weak low lifts north of the region.

Sunday through Thursday: atlantic high pressure and an inland
trough will result in mainly south southwest winds through the
period. No significant marine impacts are expected other than some
stronger storms from time to time.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 9 pm edt this evening for amz350-
374.

Near term... Ned
short term... Rjb
long term... Rjb
aviation... Ned rjb
marine... Ned rjb


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 mi41 min S 17 G 19 82°F 1015.7 hPa (+0.6)77°F
CHTS1 8 mi53 min S 8.9 G 12 83°F 87°F1015.4 hPa
41029 - Capers Nearshore (CAP 2) 19 mi33 min SSW 16 G 19 83°F 86°F1015.2 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi116 min Calm 78°F 1015 hPa78°F
41033 37 mi33 min W 7.8 G 14 78°F 85°F1014.6 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 45 mi41 min SSW 19 G 23 83°F 84°F1015.6 hPa (+0.5)77°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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
7
AM
8
AM
9
AM
Last
24hr
S6
S5
SW8
G11
SW5
SW8
G11
S11
G15
SW6
G12
SW10
G14
S8
G14
S8
G13
S9
G13
SW8
G13
SW8
G13
S6
G12
SW7
G11
SW8
G13
S6
G10
S6
G9
SW4
G7
S6
G10
S8
G11
S7
S9
G14
S8
G12
1 day
ago
SW2
G7
NW5
G8
W1
G6
SE6
S10
G13
SE11
S9
S10
G13
S9
G14
S8
G15
S7
G10
S8
G11
SW7
G12
SW6
G9
S5
G9
S7
G11
SW4
G8
SW7
S5
G10
S5
G9
S6
G9
SW5
G9
SW7
G10
SW7
G10
2 days
ago
S4
SW3
G6
SE6
S8
S11
G15
S11
G15
N11
G18
W1
G5
SW12
G20
SW9
G13
SW5
SW3
SW2
G5
NW3
NW2
N4
N4
G7
NW5
W1
SE5
S2
S2
G5
SW1
G4
W2
G6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC5 mi86 minS 89.00 miPartly Cloudy82°F77°F84%1014.9 hPa
Charleston, Charleston Air Force Base, SC18 mi1.8 hrsS 410.00 miMostly Cloudy80°F75°F87%1014.6 hPa
Mount Pleasant Regional-Faison Field, SC18 mi86 minVar 6 G 127.00 miMostly Cloudy82°F78°F89%1014.9 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrS7S7
G14
S5S10
G15
SW11S11S10
G19
S12S8S9S9S12S9SW7S9
G14
S8
G15
S5S3--S7S9S7S8S11
1 day agoSW7SW44S9S10
G15
S11S12S12S11
G17
S10S8--SW6
G11
SW4S7--------S7S5SW10----
2 days agoSW7S6S5S9S13S14NE6W10CalmSW5SW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4SW3

Tide / Current Tables for Folly Beach, Folly River bridge, Folly Island, South Carolina
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Folly Beach
Click for Map
Sat -- 03:47 AM EDT     0.37 feet Low Tide
Sat -- 06:44 AM EDT     Sunrise
Sat -- 08:28 AM EDT     Moonset
Sat -- 10:11 AM EDT     5.24 feet High Tide
Sat -- 03:51 PM EDT     0.45 feet Low Tide
Sat -- 08:02 PM EDT     Sunset
Sat -- 09:34 PM EDT     Moonrise
Sat -- 10:34 PM EDT     5.79 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
4.63.21.70.70.40.923.24.24.95.254.231.70.80.50.923.24.45.25.75.7

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Sat -- 01:24 AM EDT     -2.44 knots Max Ebb
Sat -- 04:30 AM EDT     0.00 knots Slack
Sat -- 06:43 AM EDT     1.57 knots Max Flood
Sat -- 06:44 AM EDT     Sunrise
Sat -- 08:27 AM EDT     Moonset
Sat -- 10:18 AM EDT     -0.00 knots Slack
Sat -- 01:34 PM EDT     -2.06 knots Max Ebb
Sat -- 04:37 PM EDT     0.00 knots Slack
Sat -- 07:04 PM EDT     1.58 knots Max Flood
Sat -- 08:02 PM EDT     Sunset
Sat -- 09:34 PM EDT     Moonrise
Sat -- 10:43 PM EDT     -0.00 knots Slack
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
-1.8-2.4-2.3-1.6-0.60.51.41.51.20.90.3-0.6-1.5-2-2-1.4-0.60.31.21.61.41.10.6-0.3

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (9,2,3,4)
      (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.