Monday, December11, 2017 L-36.com


Marine Weather and Tides
Isle of Palms, 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 7:11AMSunset 5:15PM Monday December 11, 2017 12:50 AM EST (05:50 UTC) Moonrise 12:51AMMoonset 1:22PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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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7 Day Forecast for Marine Location Near Isle of Palms, SC
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location: 30.97, -77.7     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 110545
afdchs
area forecast discussion
national weather service charleston sc
1245 am est Mon dec 11 2017

Synopsis
High pressure will linger over the region through early
Tuesday. A dry cold front will sweep across the region Tuesday
afternoon, followed by a cool and dry air mass into late week.

A weak cold front will then push through the area on Friday.

Near term until 6 am this morning
Clear skies and cold weather will again prevail, with yet
another night of sub-freezing temps to develop across much of
the region near and inland from us-17. However, since the
geostrophic winds are as high as 15-20 kt, ideal radiational
cooling will not occur. Even so, expect lows a good 8-10f below
normal.

Short term 6 am this morning through Wednesday
Monday, h85 winds will remain NW and downsloping across the
foothills of the carolinas around daybreak. However, winds are
forecast to back from the SW during the daylight hours. A shallow
sfc lee trough is expected to persist through the daylight hours
Monday. The combination of the lee trough to the west and high
pressure to the south should support SW winds over the cwa. The
return flow is expected to result in waa, with 1000mb-850mb
thickness increasing by 10m from 12z-0z. High temperatures in the
mid to upper 50s should be common, remaining around 5 degrees below
normal.

Tuesday, short range models indicate that a dry cold front will push
over the southern appalachians during the early morning hours. The
cold front is expected to slide over the forecast area during the
afternoon hours, resulting in winds to shift from SW to NW and
become gusty. High temperatures in the upper 50s to near 60 should
be reached during the early afternoon, then gradually cool. Forecast
soundings only hint at thin cirrus level moisture associated with
the front. Tuesday night, h85 CAA lowers temps over kchs from 0c at
0z to -8c at 12z. Low temperatures should easily fall below freezing
inland to near freezing along the coast.

Wednesday, sfc NW are forecast to continue through the morning
hours, then shifting from the SW with speeds 5 kts or less. Nam12
indicates that h85 temps will recover steadily during the day,
especially across SE ga. Using a blend of mos, high temperatures are
forecast to range from the low 50s within the altamaha river valley
to the upper 40s north.

Long term Wednesday night through Sunday
Dry high pressure will prevail over the southeast into late week
with gradually modifying temps under sunny skies well in advance of
a trough of low pressure digging over the central united states and
midwest. In general, highs should range in the mid upper 50s
Thursday, then upper 50s lower 60s Friday. A cold front could bring
a few showers to the area Friday afternoon evening before dry high
pressure prevails for the remainder of the weekend. Trends indicate
near normal temps late weekend into early next week ahead of another
cold front approaching the southeast.

Aviation 06z Monday through Friday
Vfr at kchs ksav through 06z Tuesday.

Extended aviation outlook:VFR conditions are forecast to continue
across the terminals through late this week.

Marine
Overnight: high pressure centered in southern texas will extend
east across the local waters. There is decent mixing that
occurs to keep westerly winds as high as 12-18 kt in the
atlantic and around 10 kt in charleston harbor. Seas will be
held to no more than 2-4 ft within the offshore fetch.

The region is forecast to remain between high pressure to the south
and east and a lee trough over the western carolinas on Monday. This
pattern will support steady SW winds. Wave heights are forecast to
range from 1-2 feet within 20 nm to 2-3 feet closer to 60 nm.

A dry cold front is expected to sweep across the marine zones late
Tuesday afternoon into the evening. Winds in the wake of the front
should increase from the nw, gusts are forecast to reach 25-30 kts
Tuesday night. Seas will increase to 4-6 feet across the outer ga
waters Tuesday night into Wednesday. Small craft advisories will
likely be needed outside of the chs harbor.

Sfc high pressure should return to the region Wednesday and Thursday,
providing conditions below small craft advisory criteria.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Ned
long term... Dpb
aviation...

marine...



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC171 mi75 minN 010.00 miFair37°F32°F81%1024.7 hPa

Wind History from JZI (wind in knots)
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Last 24hrW10
G16
W9W7W7W7W6W6W5NW9NW6NW5W6CalmW6SW5SW6S3SW4SW3SW4CalmCalmCalmSW4
1 day agoN8N7N8NW8NW8NW10
G19
NW10NW9NW8N7NW5W9W7W10W11W11
G16
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2 days agoNE9N8NE9N9N9N9N9N8N12N9
G15
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G22
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G18
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G16

Tide / Current Tables for
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Tide / Current Tables for
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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 (0,6,7,8)
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Ground Weather Radar Station Wilmington, NC
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weather_mapweather_map weather_map

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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.