Sunday, January21, 2018 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 7:18AMSunset 5:43PM Sunday January 21, 2018 1:10 PM EST (18:10 UTC) Moonrise 10:09AMMoonset 10:03PM Illumination 25% 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
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AMZ330 Charleston Harbor- 1230 Pm Est Sun Jan 21 2018
This afternoon..SE winds 5 to 10 kt.
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 1230 Pm 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 high pressure for the rest of the work 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 211739
afdchs
area forecast discussion
national weather service charleston sc
1239 pm est Sun jan 21 2018

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

Near term until 6 pm this evening
Early Sunday afternoon: in the wake of departing upper low,
sunshine subsidence will push temps to around 70f away from the
immediate coast. On the beaches, onshore flow produced by the
sea breeze circulation will hold temps in the 55-60f range.

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 18z Sunday through Friday
Vfr through until late tonight early Monday. Then, latest
guidance continues to advertise increasing low-level southerly
flow and associated increasing moisture late tonight early
Monday. Thus, MVFR CIGS are likely to develop at both terminals
through the balance of the 18z TAF period.

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

Marine
This afternoon: a weak pressure pattern will support a sea
breeze circulation onshore winds 10 kt or less close to shore
and variable at 5 kt or less offshore. Seas of 1-2 ft,
dominated by a 9-10 second period easterly swell, will prevail.

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 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... Spr
short term...

long term...

aviation... Spr
marine... Spr
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 9 mi86 min Calm 62°F 1025 hPa42°F
FBIS1 - Folly Island, SC 22 mi71 min S 7 G 7 51°F 1025.7 hPa (+0.0)43°F
41033 23 mi63 min SSW 1.9 G 5.8 51°F 47°F1024.3 hPa
CHTS1 23 mi41 min E 6 G 7 51°F 46°F1024.3 hPa
41029 - Capers Nearshore (CAP 2) 38 mi63 min SW 3.9 G 3.9 51°F 49°F1024.8 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 51 mi41 min E 4.1 G 5.1 55°F 46°F1024.7 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC17 mi16 minSSE 79.00 miFair63°F42°F49%1024 hPa
Beaufort County Airport, SC22 mi36 minS 37.00 miFair64°F41°F43%1024 hPa
Beaufort, Marine Corps Air Station, SC24 mi75 minESE 310.00 miFair62°F42°F48%1024.9 hPa

Wind History from JZI (wind in knots)
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Last 24hrSW8S10S10S11S6SW5SW5SW7SW8SW7SW5SW3SW5W3W4W3W4CalmCalmCalmCalmCalmCalmSE5
1 day agoSW5
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5W7S9SW9SW7SW5S6CalmSW5SW4CalmCalmCalmSW4CalmW3CalmCalmCalmCalmW5W8SW9
2 days agoNW13NW14NW10NW8NW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW5SW7W7SW7

Tide / Current Tables for Steamboat Landing, Steamboat Creek, South Carolina
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Steamboat Landing
Click for Map
Sun -- 04:40 AM EST     0.10 feet Low Tide
Sun -- 07:21 AM EST     Sunrise
Sun -- 10:09 AM EST     Moonrise
Sun -- 11:13 AM EST     5.95 feet High Tide
Sun -- 05:17 PM EST     0.13 feet Low Tide
Sun -- 05:43 PM EST     Sunset
Sun -- 10:03 PM EST     Moonset
Sun -- 11:29 PM EST     5.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.93.92.41.10.30.10.71.93.44.75.65.95.84.93.520.80.20.31.22.63.94.95.4

Tide / Current Tables for Yonges Island, Wadmalaw River, South Carolina
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Yonges Island
Click for Map
Sun -- 05:01 AM EST     0.10 feet Low Tide
Sun -- 07:21 AM EST     Sunrise
Sun -- 10:08 AM EST     Moonrise
Sun -- 11:50 AM EST     6.41 feet High Tide
Sun -- 05:38 PM EST     0.13 feet Low Tide
Sun -- 05:43 PM EST     Sunset
Sun -- 10:03 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.74.93.41.80.60.10.41.52.94.45.66.26.45.94.62.91.40.30.20.82.13.64.85.6

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.