Monday, January22, 2018 L-36.com


Marine Weather and Tides
Ridgeland, 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 7:20AMSunset 5:49PM Monday January 22, 2018 11:01 AM EST (16:01 UTC) Moonrise 10:45AMMoonset 11:04PM Illumination 33% Phase: Waxing Crescent; Moon at 6 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 1045 Am Est Mon Jan 22 2018
Today..E winds 5 to 10 kt, becoming se 10 kt. Seas 1 to 2 ft. Patchy fog late this afternoon with vsby 1 nm or less.
Tonight..S winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Patchy fog. Showers likely with a slight chance of tstms after midnight.
Tue..SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Patchy fog in the morning. A chance of showers, mainly in the morning.
Tue night..NW winds 10 to 15 kt. Seas 3 to 4 ft.
Wed..NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Wed night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Thu..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Thu night..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Fri night..E winds 10 to 15 kt. Seas 2 to 3 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1045 Am Est Mon Jan 22 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail today as a weak coastal trough moves inland. A cold front will move through the region Tuesday morning, followed by high pressure through the end of the work week. Another cold front will likely impact the area early next week.

7 Day Forecast for Marine Location Near Ridgeland, SC
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location: 32.41, -80.89     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 221549
afdchs
area forecast discussion
national weather service charleston sc
1049 am est Mon jan 22 2018

Synopsis
High pressure will prevail today as a weak coastal trough moves
inland. A cold front will move through the region Tuesday
morning, followed by high pressure through the end of the work
week. Another cold front will likely impact the area early next
week.

Near term until 6 pm this evening
We have opted to include a slight chance of showers, mainly over
the northern half of charleston county and far e-se berkeley
county. Satellite pictures showing an enhancement of cumulus
clouds, and now both kltx and kcae showing returns. This is in
response to the poorly defined coastal trough. Most places
though will stay rainfree given large dew point depressions.

Today: a vertically stacked cyclone will move NE through
nebraska and missouri, with it's associated cold front will ride
east toward the tennessee valley and through the NW gulf. As
this occurs it forces a large atlantic ridge and it's associated
short wave ridging over and near the local area further into
the ocean, supplying us with a deep s-sw flow throughout the
vertical.

Isentropic ascent will produce increasing stratocumulus clouds
that either advect onshore and or develop, while considerable
cirriform clouds will also occur in response to a coupled upper
jet moving through the se. Despite average sky coverage of
60-80%, strong warm advection with 850 mb temps reaching 10-11c
will allow for highs to reach the upper 60s and lower 70s. The
exceptions will be along the coast where onshore flow will limit
highs to around 60f north and mid 60s south.

There is a small area of sea fog hugging the coast from near
sapelo to the altamaha river entrance and southward. Some of
this will spread northward as winds veer to the s-se this
afternoon, and could reach near tybee island toward dark.

Short term 6 pm this evening through Thursday
Tonight: the region will be fully embedded within the warm
sector overnight as a cold front approaches from the west. The
front looks to remain west of the region through the day, but
will likely be approaching the far western zones around daybreak
Tuesday. A warm and increasingly moist airmass will hold in
place through the night as deep-layered forcing ahead of a
powerful upper low propagating across the middle mississippi
valley overspreads the southeast states. This will support a
swath of rain with embedded tstms ahead of the cold front with
isolated, isentropically induced shower activity developing out
well ahead of the wind shift. Likely pops around 60% will be
maintained for most areas early Tuesday, but higher pops may
eventually be needed. Increasingly wind fields within the warm
sector will prevent temperatures from dropping too much with
lows only dropping to around 60 within a well mixed boundary
layer. The record low minimum at the charleston airport could
be challenged.

Surface instability will be quite limited, but guidance shows
showalter values becoming slightly negative (as low as -1c) as
the night progresses. This coupled with the degree of deep-
layered lift throughout the column could support at least
isolated tstms, so a slight chance of tstms will be included.

Increasing dewpoints over the cooler atlantic shelf waters could
support some sea fog over the nearshore waters, some of which
could brush areas along east of the highway 17 corridor in south
carolina. A mention of "patchy fog" will be included to trend.

Tuesday: the cold front will move through the region in the morning.

Any remnant showers will quickly get pushed offshore as high
pressure builds in from the west in the afternoon and overnight
hours, bringing drier conditions and clearing skies. The increased
sunshine and some downslope flow should help to offset the initial
cool advection, allowing temperatures to rise well above normal,
especially near the coast. Breezy winds will also develop behind the
front in the afternoon. Additionally, wind gusts could briefly
approach 25 kt for lake moultrie. Cold air advection becomes more
dominant at night and that combined with the mostly clear skies will
allow temperatures to drop quite a bit from the daytime highs.

However, they are still expected to be near normal.

Wednesday and Thursday: surface high pressure will dominate.

Other than some high clouds associated with a short wave, dry
conditions are expected. Despite mostly sunny skies, weak cold air
advection will limit highs to near normal, with overnight lows a few
degrees below normal.

Long term Thursday night through Sunday
High pressure will prevail Thursday night into Friday, bringing dry
conditions and above normal temperatures. Models are in excellent
agreement showing a strong cold front approaching from the west
Saturday, then moving through the region on Sunday. Given the great
agreement, we have pops gradually increasing on Saturday, then rain
highlighted on Sunday. Periods of heavy rain and thunderstorms are
not out of the question, but we're still several days out.

Aviation 16z Monday through Friday
Ceilings will remain low-endVFR, maybe occasionally high-end
MVFR today at both kchs and ksav. Risk for low clouds will
increase this evening as low-level jetting strengthens. Rain is
expected to reach ksav by 07z and kchs by 09z. Some light
showers could reach ksav as early as 03z, but no vsbys impacts
are expected. Again, limited any vsby restrictions in the rain
to MVFR for now.

Extended aviation outlook: gusty winds are expected behind a cold
front on Tuesday.

Marine
Today: the local waters will lie under the western portions of
extensive atlantic high pressure, with the anticyclonic
circulation only marginally interrupted by N ill-defined coastal
trough that dissipates this afternoon. While this is initially
keeping winds NE and E closer to shore, winds will veer to s-se
all waters this afternoon. Speeds on average will be no higher
than 10 or 15 kt, with limited seas at or less than 2 ft.

Satellite images showing sea fog near sapelo island and the
mouth of the altamaha river, and some of this will spread
further north through the afternoon as winds veer around,
perhaps reaching near the entrance of the savannah river late. A
marine weather statement has been issued to mention the fog and
address the concern for locally dense fog.

Tonight: the risk for sea fog will continue, if not slightly
increase later in the evening, as dewpoints rise even more and
low-level trajectories favor increasing parcel residence times
over the cold shelf waters. Speeds will increase to 15-20 kt
with seas building to 2-4 ft, highest over the georgia offshore
leg. Seas should remain below small craft advisory thresholds,
although it could be close beyond 40 nm closer to daybreak.

Tuesday and Tuesday night: a cold front will move through the waters
in the morning. Continental high pressure will build in from the
west during the day and overnight. Cold air advection behind the
front combined with an enhanced pressure gradient will lead to
increased winds and seas in the afternoon and evening hours. We may
need small craft advisories for amz350 and 374 along with the
charleston harbor. Conditions will improve overnight as the gradient
lessens.

Climate
Record high minimums for 23 january:
kchs: 62 1999
kcxm: 66 1937
ksav: 65 1937

Equipment
The kclx radar remains 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.

Near term...

short term...

long term...

aviation...

marine...

climate...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 25 mi77 min Calm 58°F 1022 hPa50°F
FPKG1 - 8670870 - Fort Pulaski, GA 26 mi44 min E 5.1 G 6 50°F 46°F1022.9 hPa
41033 27 mi54 min NE 3.9 G 5.8 50°F 48°F1021.4 hPa
FBIS1 - Folly Island, SC 56 mi62 min N 2.9 G 4.1 51°F 1023.3 hPa (+0.6)50°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC10 mi66 minN 010.00 miMostly Cloudy57°F48°F74%1022.7 hPa
Beaufort County Airport, SC14 mi67 minENE 35.00 miPartly Cloudy with Haze57°F50°F77%1022.3 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi72 minNE 510.00 miMostly Cloudy59°F48°F68%1023 hPa

Wind History from NBC (wind in knots)
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Last 24hrSE3E3CalmSE4SE5SE8S5S4SE4SE3SE3CalmCalmCalmNW3CalmCalmNE3N3N3CalmCalmNE3Calm
1 day agoW7W7W8SW9SW8SW7S6S6S4S6S3S5CalmSW5SW4CalmSW3CalmCalmCalmCalmCalmCalmCalm
2 days agoW8W7W10W5W8W5SE7SE4CalmSE3SW5SW4SW4CalmSW7SW3SW4S3CalmS3CalmCalmS3W4

Tide / Current Tables for Broughton Point, Hazzard Creek, Broad River, South Carolina
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Broughton Point
Click for Map
Mon -- 12:29 AM EST     6.98 feet High Tide
Mon -- 06:43 AM EST     0.20 feet Low Tide
Mon -- 07:23 AM EST     Sunrise
Mon -- 10:45 AM EST     Moonrise
Mon -- 12:52 PM EST     7.20 feet High Tide
Mon -- 05:47 PM EST     Sunset
Mon -- 07:18 PM EST     0.01 feet Low Tide
Mon -- 11:03 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.96.96.14.83.21.60.50.212.74.566.97.26.85.74.22.40.90.10.31.53.45.2

Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina
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Hwy. 170 bridge
Click for Map
Mon -- 05:59 AM EST     0.23 feet Low Tide
Mon -- 07:22 AM EST     Sunrise
Mon -- 10:44 AM EST     Moonrise
Mon -- 12:09 PM EST     6.94 feet High Tide
Mon -- 05:47 PM EST     Sunset
Mon -- 06:34 PM EST     0.01 feet Low Tide
Mon -- 11:03 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.76.253.51.90.70.20.72.13.95.56.56.96.75.84.52.81.20.20.11.12.74.55.9

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (11,2,3,4)
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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.