Monday, June26, 2017 L-36.com


Marine Weather and Tides
Rockville, 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 6:12AMSunset 8:33PM Monday June 26, 2017 1:21 PM EDT (17:21 UTC) Moonrise 8:03AMMoonset 9:56PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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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AMZ330 Charleston Harbor- 1017 Am Edt Mon Jun 26 2017
Rest of today..NE winds 10 kt, except 10 to 15 kt near the harbor entrance, becoming E late.
Tonight..E winds 10 kt in the evening, diminishing to 5 kt and becoming N late. A slight chance of showers and tstms after midnight.
Tue..N winds around 5 kt, becoming E 5 kt in the afternoon. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Tue night..E winds 5 kt, becoming ne after midnight. A chance of showers and tstms, mainly in the evening.
Wed..E winds 5 to 10 kt.
Wed night..E winds 5 to 10 kt.
Thu..SE winds 5 to 10 kt.
Thu night..SE winds 5 to 10 kt. A slight chance of showers and tstms.
Fri..SE winds 5 to 10 kt. A chance of showers and tstms.
Fri 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 84 degrees.
AMZ300 1017 Am Edt Mon Jun 26 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will linger just offshore through Tuesday. High pressure is forecasted to pass to our north Wednesday, then move into the atlantic during the second half of the week.

7 Day Forecast for Marine Location Near Rockville, SC
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location: 32.6, -80.29     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 261710
afdchs
area forecast discussion
national weather service charleston sc
110 pm edt Mon jun 26 2017

Synopsis
A cold front will linger near the coast or just offshore
through Tuesday. High pressure is forecast to pass to the north
Wednesday, then move into the atlantic during the second half of
the week.

Near term until 6 pm this evening
No significant changes were made with the latest update. A cold
front across the area should make a bit more southward progress
through the day which will keep the best
moisture instability convergence closer to the lower sc coast
into eastern portions of southeast ga. Scattered to numerous
showers and some thunderstorms are expected in these areas,
especially south of i-16. Similar to Sunday, high pwats near 2
inches and the potential for convective training could yield
pockets of flooding, mainly south of savannah in urban and low-
lying poor drainage areas. An isolated severe storm could also
occur with damaging winds, mainly closer to the altamaha river.

Highs will warm into the mid 80s for most locations with upper
80s possible, mainly interior southeast ga.

Short term 6 pm this evening through Thursday
Tonight: convection across the far south will quickly wind down
during the early evening hours. Another weak area of low
pressure is expected to develop along the cold front overnight,
which could push isolated shower activity back onshore along
the beaches early Tuesday. Will show slight chance pops across
the various beach communities to account for this. Lows will
range from the mid-upper 60s inland to the upper 70s along the
georgia coast.

Tuesday through Thursday: a cold front will linger just
offshore Tuesday. At the coast: chance pops remain in place for
our coastal counties due to their proximity near the
moisture lift associated with the front. The highest instability
is far offshore, so we're not expecting any significant storms
across the area. Inland: pops are slight chance as drier air
from a surface high to our northwest builds into the area. The
front will be pushed away from our area Tuesday night as the
high moves closer. The center of the high is forecasted to pass
to our north Wednesday. Most of the area should be dry at that
time, but models hint at some moisture instability across our
southernmost counties in the afternoon evening hours as some
convergence takes place along the sea breeze. We have slight
chance pops to account for this. The high shifts offshore
Thursday, allowing S to SE flow to develop late. This will bring
more moisture into our southern counties and further increase
the threat of showers thunderstorms. High temperatures will be
within a few degrees of normal each day.

Long term Thursday night through Sunday
Nearly zonal flow will persist aloft with surface high pressure in
the atlantic. Southerly flow around the high will advect moisture
into the southeast as an inland trough develops into the weekend.

The result will be the typical summertime shower thunderstorm
pattern with the coverage and intensity appearing to increase each
day into the weekend.

Aviation 18z Monday through Saturday
GenerallyVFR, although there is a low risk of restrictions
from low clouds showers thunderstorms at ksav this afternoon
and fog and or low clouds at kchs ksav late tonight.

Extended aviation outlook: brief flight restrictions are possible
due to showers thunderstorms Tuesday afternoon evening and then
again on Friday.

Marine
Today: north to northeast winds will prevail behind a passing
cold front. Expect a bit of a surge in winds, up to around 15 to
possibly 20 kt at times. Seas will build a bit but should stay
3 ft or less.

Tonight: a light northeast flow regime will hold in place with
speeds around 5 kt. Seas 2-3 ft during the evening hours will
subside to 1-2 ft after midnight.

Tuesday through Friday: a cold front will linger just offshore
Tuesday, bringing changing wind directions. High pressure is
forecasted to pass to our north Wednesday, causing an increase in
the pressure gradient, which will lead to slightly higher winds and
seas Wednesday and Thursday. Conditions will improve as the high
moves into atlantic during the second half of the week, allowing the
gradient to decrease.

Tides coastal flooding
Tides could once again approach shallow coastal flooding
thresholds in the charleston harbor with the late evening high
tide cycle. Tide levels at fort pulaski look to peak just shy of
shallow coastal flooding levels. A coastal flood advisory may be
needed for parts of the lower south carolina coast, especially
for charleston county.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Rjb
short term...

long term...

aviation... Rjb
marine... Rjb
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 9 mi97 min NNE 4.1 82°F 1019 hPa72°F
FBIS1 - Folly Island, SC 22 mi82 min NNE 13 G 15 79°F 1019.5 hPa (+0.6)69°F
41033 23 mi74 min ENE 12 G 16 80°F 83°F1018.2 hPa
CHTS1 23 mi52 min N 13 G 17 83°F 84°F1019.2 hPa
41029 - Capers Nearshore (CAP 2) 38 mi74 min NE 18 G 21 85°F 83°F1018.4 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 51 mi52 min ENE 2.9 G 5.1 80°F 84°F1019.2 hPa

Wind History for Charleston, SC
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S10
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S11
G15
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G16
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G13
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G12

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC17 mi27 minNE 710.00 miMostly Cloudy82°F69°F66%1019 hPa
Beaufort County Airport, SC22 mi27 minNE 75.00 miMostly Cloudy with Haze81°F71°F74%1019 hPa
Beaufort, Marine Corps Air Station, SC24 mi26 minENE 910.00 miMostly Cloudy86°F72°F63%1018.9 hPa

Wind History from JZI (wind in knots)
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Last 24hrS5S8
G14
S9SW4N9CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW6N6NE6NE11NE10
G16
1 day agoS11
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S6SW5SW6SW7S5SW11
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SW8SW6S7NW8NW4W7NW6N3CalmSE5
2 days agoS12S13S12
G17
S15S15S15
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S12S13SW10
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SW11SW6SW6SW11--SW6
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G14

Tide / Current Tables for Steamboat Landing, Steamboat Creek, South Carolina
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Steamboat Landing
Click for Map
Mon -- 04:59 AM EDT     -0.66 feet Low Tide
Mon -- 06:15 AM EDT     Sunrise
Mon -- 09:02 AM EDT     Moonrise
Mon -- 11:34 AM EDT     6.30 feet High Tide
Mon -- 05:07 PM EDT     -0.73 feet Low Tide
Mon -- 08:32 PM EDT     Sunset
Mon -- 10:56 PM EDT     Moonset
Mon -- 11:55 PM EDT     7.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.35.83.81.6-0-0.7-0.11.12.74.25.46.26.25.33.61.70.1-0.7-0.312.84.66.27.2

Tide / Current Tables for Yonges Island, Wadmalaw River, South Carolina
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Yonges Island
Click for Map
Mon -- 05:20 AM EDT     -0.66 feet Low Tide
Mon -- 06:14 AM EDT     Sunrise
Mon -- 09:02 AM EDT     Moonrise
Mon -- 12:11 PM EDT     6.79 feet High Tide
Mon -- 05:28 PM EDT     -0.73 feet Low Tide
Mon -- 08:32 PM EDT     Sunset
Mon -- 10:56 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.47.35.32.80.7-0.6-0.40.62.23.85.26.36.86.44.92.90.8-0.6-0.60.52.24.15.97.2

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 (13,3,4,5)
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Ground Weather Radar Station Charleston, SC
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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.