Sunday, January21, 2018 L-36.com


Marine Weather and Tides
Hanahan, SC

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 7:19AMSunset 5:43PM Sunday January 21, 2018 7:51 AM EST (12:51 UTC) Moonrise 10:08AMMoonset 10:02PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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- 548 Am Est Sun Jan 21 2018
Today..Variable winds less than 5 kt, becoming se 5 kt in the afternoon.
Tonight..Variable winds 5 kt.
Mon..E winds 5 kt, becoming se in the afternoon. A slight chance of showers.
Mon night..S winds 10 kt, increasing to 15 kt with gusts to 20 kt after midnight. A slight chance of showers in the evening, then a chance of showers after midnight.
Tue..SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers in the morning.
Tue night..W winds 10 kt.
Wed..NW winds 5 to 10 kt.
Wed night..NW winds 5 to 10 kt.
Thu..NE winds 5 to 10 kt.
Thu night..NE winds 5 to 10 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 45 degrees.
AMZ300 548 Am Est Sun Jan 21 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into Monday. A cold front will move through the region Tuesday morning, followed by more high pressure for the rest of the work week.

7 Day Forecast for Marine Location Near Hanahan, SC
   Hourly   EDIT   Help
location: 32.91, -79.94     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 211052
afdchs
area forecast discussion
national weather service charleston sc
552 am est Sun jan 21 2018

Synopsis
High pressure will prevail into Monday. A cold front will move
through the region Tuesday morning, followed by more high
pressure for the rest of the work week.

Near term until 6 pm this evening
Temperatures are starting out much warmer than expected and
about 10 degrees higher than guidance. Opted to nudge afternoon
highs up a degree or so for some areas as a result. Kjax radar
is detecting returns off the georgia and far southern south
carolina coast. The sub- cloud layer is way too dry to support
any hydrometers reaching the surface, thus maintained a dry
forecast for the morning hours.

Cirrus associated with the subtropical jet will gradually
diminish this morning as the jet pushes farther offshore in
response to potent southern stream shortwave energy exiting off
to the northeast. Impacts from the passing shortwave will be
negligible with 850 hpa temperature forecast to rise to 10-11c
and 1000-805 hpa thicknesses peaking 1355-1360m by afternoon.

This will support highs within a degree or two of 70f for most
areas away from the beaches under mostly sunny skies. A light
onshore flow will develop by early afternoon as surface high
pressure shifts offshore. This will keep the beaches and barrier
islands a few degrees cooler where influences from the cooler
atlantic will be more prevalent.

Short term 6 pm this evening through Wednesday
Tonight: a return flow regime will setup tonight as high
pressure shifts farther out to sea and a cold front approaches
the lower mississippi valley. Another bout of cirrus will likely
overspread the region after midnight as another powerful
subtropical jet spreads high-level moisture across the deep
south ahead of a developing winter storm across the central
plains. Could see a little stratus and possibly some shallow
ground fog develop closer to sunrise as isentropic assent atop
a weak coastal trough offshore impacts the coastal areas.

However, no measurable rainfall or major stratus fog problems
are expected. It will be another warm night despite a decoupled
boundary layer with lows ranging from the lower 40s across
interior southeast south carolina to the upper 40s near 50 near
the immediate coast and beaches.

Monday: high pressure will prevail over the southeast the first part
of Monday, then quickly move offshore as a cold front approaches
from the west. Weak coastal troughing will also form at this time.

The result will be an increasing threat of showers along the coast
into the tri-county during the day, with the threat increasing
inland overnight with the front. A few hundredths of an inch of qpf
are expected across the area, mainly late at night. Temperatures
will be well above normal.

Tuesday and Wednesday: remnant showers may linger along the coast in
the morning as the front moves offshore. High pressure will build in
from the west during the afternoon and prevail into Wednesday,
bringing dry conditions. Temperatures will be above normal Tuesday
and near normal Wednesday.

Long term Wednesday night through Saturday
High pressure will prevail into Friday, bringing dry conditions and
seasonal temperatures. The threat of showers returns with a
disturbance on Saturday.

Aviation 12z Sunday through Thursday
Primary concern:
* none.

Vfr. Low-end risk for MVFR CIGS developing closer to daybreak
Monday.

Extended aviation outlook: flight restrictions are likely with a
cold front Monday night into Tuesday morning.

Marine
Today: northwest winds will turn onshore this afternoon as high
pressure shifts offshore. Speeds will be <10kt with seas 1 ft
or less nearshore and 1-2 ft offshore.

Tonight: weak onshore flow will persist as a weak coastal trough
develops offshore. The trough will remain rather ill-defined
with only a subtle wind shift confined mainly to the georgia
offshore waters. Winds will remain <10 kt with seas 1 ft or
less nearshore and 1-2 ft offshore.

Monday through Thursday: high pressure will prevail Monday. A cold
front will move through the region Tuesday morning, bringing a brief
increase in winds seas and maybe some sea fog. Seas might approach 6
ft for a few hours across the outer portion of amz350 Tuesday
morning, so a small craft advisory is not out of the question.

High pressure will build towards the southeast late Tuesday and
prevail into Thursday.

Equipment
The kclx radar is out of service until further notice. Repairs
are ongoing. Adjacent radars include: kltx, kcae, kjgx, kvax and
kjax.

The downtown charleston observation site (chls1 kcxm) remains
out of service until further notice.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.



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
CHTS1 9 mi52 min W 1 G 2.9 50°F 46°F1024.7 hPa (+1.0)
FBIS1 - Folly Island, SC 16 mi52 min WSW 2.9 G 2.9 50°F 1025.1 hPa (+0.9)30°F
41029 - Capers Nearshore (CAP 2) 18 mi44 min W 3.9 G 5.8 45°F 48°F1024.4 hPa
ACXS1 - ACE Basin Reserve, SC 36 mi67 min Calm 45°F 1025 hPa39°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 50 mi67 min WNW 1.9 46°F 1024 hPa33°F

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
NW4
NW3
G6
NW3
W3
NW4
G7
W1
G5
SW3
SE7
S7
S5
G9
S4
G7
SW5
SW5
G8
SW6
SW6
G9
SW7
SW6
SW3
G7
SW4
W5
SW4
W6
W4
W1
G5
1 day
ago
W4
SW3
W4
G7
W6
W6
G9
W7
SW6
G9
SW6
G10
W4
G8
SW4
G7
SW8
G11
SW7
G11
SW6
G9
SW5
G8
SW5
G8
SW5
G8
SW5
SW5
SW3
G6
SW4
SW3
W4
G7
W4
NW4
2 days
ago
NW8
G14
NW9
G16
NW10
G17
NW9
G14
NW11
G15
NW11
G15
NW8
G13
NW5
G11
NW7
G14
NW6
G12
NW7
G11
NW4
NW3
NW3
W3
W3
SW4
W5
W6
W5
G8
W5
G9
W5
W6
W6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston, Charleston Air Force Base, SC5 mi56 minN 010.00 miMostly Cloudy47°F30°F52%1024.6 hPa
Mount Pleasant Regional-Faison Field, SC8 mi57 minN 010.00 miFair45°F35°F71%1024.7 hPa
Charleston Executive Airport, SC15 mi57 minN 010.00 miFair48°F32°F54%1024.7 hPa
Moncks Corner Berkeley County, SC20 mi57 minN 07.00 miFair41°F33°F76%1024.7 hPa
Summerville Airport, SC21 mi57 minN 010.00 miFair39°F33°F81%1024.7 hPa

Wind History from CHS (wind in knots)
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
7
AM
Last 24hrCalmW53NW5SW8SW10W8SW9W7S11S9SW9SW5SW7S4SW6SW5W4CalmSW3NW4CalmCalmCalm
1 day agoS5SW5SW8SW7W8W7W9SW9W4W7SW8SW7SW5SW5W5W4SW3SW3CalmW4W4SW3SW3SW3
2 days agoNW10NW12
G19
N10N14NW10NW11NW9
G16
NW12NW9NW6NW3CalmNW5NW8CalmS5W3CalmW4W3CalmCalmCalmCalm

Tide / Current Tables for Clouter Creek, north entrance, Cooper River, South Carolina
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Clouter Creek
Click for Map
Sun -- 04:48 AM EST     0.09 feet Low Tide
Sun -- 07:20 AM EST     Sunrise
Sun -- 10:07 AM EST     Moonrise
Sun -- 11:13 AM EST     5.38 feet High Tide
Sun -- 05:25 PM EST     0.12 feet Low Tide
Sun -- 05:41 PM EST     Sunset
Sun -- 10:02 PM EST     Moonset
Sun -- 11:29 PM EST     4.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.53.52.31.10.30.10.61.634.255.45.24.53.31.90.80.20.212.23.54.54.9

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Sun -- 01:48 AM EST     -2.00 knots Max Ebb
Sun -- 04:45 AM EST     0.00 knots Slack
Sun -- 07:20 AM EST     Sunrise
Sun -- 07:37 AM EST     1.66 knots Max Flood
Sun -- 10:07 AM EST     Moonrise
Sun -- 11:08 AM EST     -0.00 knots Slack
Sun -- 02:23 PM EST     -2.19 knots Max Ebb
Sun -- 05:27 PM EST     0.00 knots Slack
Sun -- 05:41 PM EST     Sunset
Sun -- 08:03 PM EST     1.56 knots Max Flood
Sun -- 10:02 PM EST     Moonset
Sun -- 11:19 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1.8-2-1.6-0.70.211.51.61.20.70.1-0.8-1.7-2.2-2.1-1.4-0.40.51.21.61.30.70.2

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (7,2,3,4)
      (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.