Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Hollywood, SC

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:56AMSunset 6:10PM Wednesday February 20, 2019 1:27 PM EST (18:27 UTC) Moonrise 7:35PMMoonset 7:52AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 1205 Pm Est Wed Feb 20 2019
This afternoon..NW winds 5 to 10 kt, becoming se late. A chance of showers.
Tonight..SE winds 5 to 10 kt, becoming S after midnight. A chance of showers, mainly in the evening. Patchy fog in the evening, then areas of dense fog after midnight.
Thu..SW winds 10 kt. A slight chance of showers. Areas of fog.
Thu night..SW winds 5 to 10 kt. A chance of showers. Areas of fog after midnight.
Fri..E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers.
Fri night..NE winds 10 to 15 kt. A slight chance of showers.
Sat..SE winds 5 to 10 kt. A slight chance of showers.
Sat night..S winds 10 to 15 kt. A slight chance of showers.
Sun..SW winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers.
Sun night..NW winds 10 to 15 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 55 degrees.
AMZ300 1205 Pm Est Wed Feb 20 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A nearly stationary front will meander near the area through Saturday morning. A cold front will sweep through from the west late Sunday, followed by high pressure on Monday. A low pressure system could affect the area next Tuesday.


7 Day Forecast for Marine Location Near Hollywood, SC
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location: 32.73, -80.07     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 201754
afdchs
area forecast discussion
national weather service charleston sc
1254 pm est Wed feb 20 2019

Synopsis
A nearly stationary front will meander near the area through
Saturday morning. A cold front will sweep through from the west
late Sunday, followed by high pressure on Monday. A low
pressure system could affect the area next Tuesday.

Near term through tonight
Several changes were made with this update.

Pops weather: radar indicates scattered showers generally across
berkeley and charleston counties, moving to the nne. We
adjusted the hourly grids to try to better capture its movement
and the lower shower activity elsewhere. More adjustments will
be needed as we account for the new run of hi-res models.

Temperatures dew points: observations are running lower than
what's in the forecast, mainly because the wedge is limiting the
inland movement of the cold front. Though, there are some
observations at the sc beaches that have risen into the mid 60s
with SE winds. We expect the front to gradually move inland, but
more than likely the cold air will rule most of the afternoon.

Hence, we lowered temperatures to try to account for this.

However, they may still be too high given the location and
movement of the front.

Tonight: the warm front will move inland during the evening
hours, then quickly lift north of our area. Meanwhile, a cold
front will be approaching our area, becoming located east of
the southern appalachians towards daybreak Thursday. Winds
across the CWA is forecast to shift from the south late this
evening and will remain through tonight. Sfc dewpoints are
expected to warm into the low 60s by midnight. Near shore buoys
indicate that water temperatures remain in the mid 50s. Warm and
moisture return flow across the cooler shelf waters will favor
the development of sea fog, building over the coast with time.

At this time, it is uncertain if the fog will become widespread
and dense or remain patchy dense. Low temperatures around 60
will be common tonight.

Short term Thursday through Saturday
The area should be solidly in the warm-sector on Thursday with
the front to the north. We may see some brief, partial clearing
during the daytime hours. Temps soaring into the upper 70s to
lower 80s and dewpoints in the low to mid 60s will produce
modest surface-based instability. We held onto a slight chance
of showers given weak upper shortwave energy propagating through
the area.

Thursday night the front to our north will begin shifting south,
potentially moving into our far northern zones close to daybreak
Friday. Isentropic ascent will gradually increase overnight with
scattered showers possible, mainly inland. Conditions look ripe
for areas of fog to develop along and south of the front.

The backdoor cold front will drop south to near the savannah
river on Friday, allowing northeast flow to redevelop over
southern sc. Isentropic ascent will strengthen from north to
south during the day, likely producing scattered showers mainly
over southern sc, highest coverage inland. High temps will range
from lower 60s far north to lower 80s far south.

The stalled front will remain across the area through Friday
night, then slowly move north on Saturday. Rain chances will
gradually dwindle during this period. Highs on Saturday will be
in the mid to upper 70s in most locations.

Long term Saturday night through Wednesday
A potent cold front will sweep through the area Sunday afternoon
though only scattered showers are expected to accompany it.

Strong warm air advection ahead of the front will produce high
temps in the upper 70s on Sunday. Somewhat cooler weather is in
store for Monday through Wednesday as a series of high pressure
areas move into the area. A gulf low pressure system could bring
some rain to the area Tuesday and Tuesday night.

Aviation 18z Wednesday through Monday
A warm front will move inland this evening, passing west of the
terminals and causing moisture to increase. Ifr is expected to
prevail, initially due to ceilings. Ceilings are expected to
lower late this evening and overnight. Meanwhile, visibilities
should lower as fog forms. Conditions should start to improve
after daybreak Thursday, but ifr could linger until the end of
the TAF period.

Extended aviation outlook: low ceilings are likely Wednesday
night through Thursday morning. Low ceilings and or reduced
visibility likely Thursday night through Saturday morning.

Marine
Updated to let the small craft advisory expire for two of the
zones. Conditions will continue to improve as the trough and
warm front moves inland late this afternoon. Winds will
gradually ease and transition to east and then southeast, first
in the ga waters and then in the sc waters. Small craft
advisories remain in effect for the ocean waters, but they are
expected to expire for some of the waters today as conditions
improve.

Tonight: in the wake of the passing warm front, winds will
remain steady from the sw. Sfc dewpoints are expected to warm
into the low 60s by midnight. Near shore buoys indicate that
water temperatures remain in the mid 50s. Warm and moisture
return flow across the cooler shelf waters will favor the
development of sea fog, building over the coast with time. At
this time, it is uncertain if the fog will become widespread and
dense or remain patchy dense. Wave heights of six feet should be
limited to the outer portions of amz350 and 374.

A brief window for small craft advisory conditions will exist
late Friday night over the charleston sc nearshore waters behind
a backdoor cold front. More widespread SCA conditions are
possible Sunday ahead of a cold front.

The more significant concern is the likely development and
persistence of sea fog due to surface dewpoints in the low to
mid 60s moving over the cool shelf waters. The most likely time
frame will be Thursday and Thursday night when low-level flow is
southerly. By midday Friday the winds will be northeast which is
less favorable.

Tides coastal flooding
This evening's high tide is the lower of the two for the day.

The wind direction is forecasted to shift towards the south and
ease, but residual anomalies could allow the tide to briefly
approach minor coastal flooding advisory criteria at charleston.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 4 pm est Thursday for amz374.

Small craft advisory until midnight est tonight for amz350.

Near term...

short term...

long term... Jrl
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 9 mi58 min NNW 7 G 9.9 59°F 56°F1021.7 hPa
FBIS1 - Folly Island, SC 10 mi88 min N 5.1 G 7 61°F 1021.8 hPa (-1.4)61°F
41029 - Capers Nearshore (CAP 2) 24 mi80 min ESE 5.8 G 9.7 64°F 55°F1021.5 hPa
ACXS1 - ACE Basin Reserve, SC 24 mi103 min N 2.9 57°F 1022 hPa55°F
41033 36 mi80 min N 12 G 18 57°F 1021 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi38 min S 9.7 G 14 65°F8 ft1020.9 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC4 mi33 minNNW 52.00 miFog/Mist59°F59°F100%1021 hPa
Charleston, Charleston Air Force Base, SC13 mi32 minN 92.00 miFog/Mist56°F54°F93%1021 hPa
Mount Pleasant Regional-Faison Field, SC19 mi33 minNW 43.00 miFog/Mist61°F60°F100%1021 hPa

Wind History from JZI (wind in knots)
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1 day ago6W7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE6NE8NE9
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2 days agoCalmCalmCalmCalmE6E6E4E5SE5CalmS6S15SW12SW9
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Tide / Current Tables for Church Creek bridge, Wadmalaw River, South Carolina
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Church Creek bridge
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Wed -- 03:09 AM EST     -1.29 feet Low Tide
Wed -- 06:58 AM EST     Sunrise
Wed -- 07:51 AM EST     Moonset
Wed -- 10:28 AM EST     8.45 feet High Tide
Wed -- 03:41 PM EST     -0.99 feet Low Tide
Wed -- 06:10 PM EST     Sunset
Wed -- 07:34 PM EST     Moonrise
Wed -- 10:56 PM EST     7.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.92.3-0.1-1.3-0.90.42.34.46.27.68.48.26.74.21.5-0.5-0.9-0.21.43.24.96.47.47.7

Tide / Current Tables for Charleston Harbor, off Fort Sumter, South Carolina Current (expired 1996-12-31)
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Charleston Harbor
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Wed -- 02:56 AM EST     0.00 knots Slack
Wed -- 05:46 AM EST     3.23 knots Max Flood
Wed -- 06:57 AM EST     Sunrise
Wed -- 07:50 AM EST     Moonset
Wed -- 09:11 AM EST     -0.00 knots Slack
Wed -- 12:16 PM EST     -3.49 knots Max Ebb
Wed -- 03:34 PM EST     0.00 knots Slack
Wed -- 06:09 PM EST     Sunset
Wed -- 06:14 PM EST     2.84 knots Max Flood
Wed -- 07:33 PM EST     Moonrise
Wed -- 09:29 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-3.3-2.7-1.60.11.833.22.71.80.3-1.4-2.8-3.5-3.3-2.4-10.72.22.82.61.90.7-0.8-2.4

Weather Map and Satellite Images
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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Charleston, SC (13,3,4,5)
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Ground Weather Radar Station Charleston, SC
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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.