Monday, March30, 2020
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Marine Weather and Tides
Hollywood, SC

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:08AMSunset 7:39PM Monday March 30, 2020 12:37 PM EDT (16:37 UTC) Moonrise 10:01AMMoonset 12:00AM Illumination 41% Phase: Waxing Crescent; Moon at 7 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- 1036 Am Edt Mon Mar 30 2020
Rest of today..W winds 10 kt, becoming S this afternoon.
Tonight..Variable winds 5 kt.
Tue..NE winds 5 to 10 kt, becoming E 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers and tstms in the afternoon.
Tue night..S winds 10 kt, becoming nw after midnight. Showers with a chance of tstms in the evening, then showers with a slight chance of tstms after midnight.
Wed..N winds 10 to 15 kt with gusts to 20 kt. A chance of showers in the morning.
Wed night..N winds 5 to 10 kt.
Thu..N winds 5 kt.
Thu night..W winds 5 kt.
Fri..NE winds 5 kt.
Fri night..SE winds 5 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 68 degrees.
AMZ300 1036 Am Edt Mon Mar 30 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak pressure pattern will exist today into tonight. Low pressure will then cross the area Tuesday into Tuesday night, followed by high pressure for mid to late week.


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 301440 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1040 AM EDT Mon Mar 30 2020

SYNOPSIS. A weak pressure pattern will exist today into tonight. Low pressure will then cross the area Tuesday into Tuesday night, followed by high pressure for mid to late week.

NEAR TERM /THROUGH TONIGHT/. Dry westerly flow, albeit weak, will persist today following a weak cold frontal passage this morning. Surface dewpoints will mix down into the 40s as drier aloft gets mixed down. Considerable cirrus will spread in from the west, but high temps will not be impacted very much. Away from the coast, highs will reach the mid to upper 80s.

Tonight: A stationary front will remain to the south, as low pressure travels quickly eastward from northern Texas into the lower Mississippi Valley. To the north we find the southern extension of high pressure poking in late from the lee of the mountains. Mid and high level clouds will steadily increase, so we didn't go as low for temps as the MOS guidance would suggest, equating to min temps that are close to 10F above normal.

SHORT TERM /TUESDAY THROUGH THURSDAY/. Tuesday will be the most active day of the coming week. A potent mid level trough will swing into the eastern U.S. through the day. As this occurs, surface low pressure will approach from the west and eventually track over the area in the afternoon and evening. Increasing moisture (noted by PWats of over 1.6 inches) and forcing for ascent will provide focus for showers and some thunderstorms. Most areas are expected to receive a half of an inch of rain on average through the event. Attention then turns to the severe weather potential. 0-6 km shear is over 50 knots, which will certainly promote storm organization. The limiting factor will be the instability. Mid level lapse rates are unimpressive and CAPE values are marginal. The most favorable ingredients will be across Georgia zones, especially south of I-16, which is where SPC Day 2 Outlook highlights a Slight Risk of severe weather. Areas further north near the Charleston tri-county will reside in a more stable environment, so the severe threat will be lesser. The primary threat within strong/severe storms are damaging wind gusts and perhaps a tornado. Otherwise, temperatures will peak in the 70s, around 80 near the Altamaha.

The bulk of rainfall will push off the coast late Tuesday evening, with any lingering showers diminishing by Wednesday morning as drier air filters in. Cold advection will bring lows closer to normal.

The low will pull away from the area on Wednesday as high pressure expands into the region. Residual low level moisture will keep clouds around for the first part of the day, but cloud cover will diminish with time. Noticeably cooler temperatures are expected, with highs peaking in the mid to upper 60s. Lows Wednesday night near normal.

High pressure will persist through Thursday. Dry conditions are expected with plenty of sunshine. Highs will range from the upper 60s in the north to mid 70s south.

LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/. Relatively quiet weather expected late week into the weekend as high pressure remains the dominant feature. A couple models hint that a weak front could approach/cross late in the period, but this has been trending later each day. Rain chances overall will remain pretty low, but as moisture returns over the weekend a few showers can't be ruled out. Temperatures will be near to slightly above normal.

AVIATION /15Z MONDAY THROUGH FRIDAY/. Through 12 Monday: VFR at both CHS and KSAV.

Extended Aviation Outlook: Flight restrictions in low clouds and showers/thunderstorms are likely Tuesday evening into Tuesday night as low pressure crosses the area. VFR is expected to return Wednesday morning and will prevail through late week.

MARINE. Today: A cold front will pass through the waters, and stall just south of the waters later today/tonight. Weak high pressure will develop over the area through today. Generally light westerly winds 10 knots or less will become onshore near the coast in the afternoon, and veer back to southwest offshore. Seas will average 2 or 3 ft.

Tonight: We find the front wavering near the Florida waters in advance of low pressure moving through Texas toward the lower Mississippi Valley. Winds will begin the night from the S or SW at or below 10 kt, veering to W'erly after midnight, then finally to NW and N late as the leading edge of high pressure tries to nose in from the north. Seas will average just 1-2 ft.

Tuesday through Saturday: Low pressure will track into and over the area Tuesday into Tuesday night. Winds and seas will increase as this occurs, and Small Craft Advisories will be possible for portions of the waters Tuesday evening into Wednesday morning. The low will lift away from the area on Wednesday, allowing conditions to improve. High pressure will then return for the latter half of the week. No additional marine concerns are anticipated.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.

NEAR TERM . JRL SHORT TERM . ETM LONG TERM . ETM AVIATION . MARINE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 9 mi49 min W 6 G 14 79°F 68°F1019.3 hPa
FBIS1 - Folly Island, SC 10 mi37 min NNW 7 G 8.9 78°F 1019.4 hPa (-0.5)56°F
41029 - Capers Nearshore (CAP 2) 24 mi89 min NW 5.8 G 9.7 71°F 67°F1018.9 hPa
ACXS1 - ACE Basin Reserve, SC 24 mi112 min WNW 2.9 76°F 1020 hPa49°F
41033 36 mi89 min NW 9.7 G 16 73°F 1019.3 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi37 min 9.7 G 12 70°F 70°F1018.8 hPa (-0.3)70°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC4 mi42 minNNW 78.00 miFair79°F50°F37%1019.3 hPa
Charleston, Charleston Air Force Base, SC13 mi41 minNW 710.00 miMostly Cloudy79°F45°F30%1018.7 hPa
Mount Pleasant Regional-Faison Field, SC19 mi42 minN 09.00 miFair79°F48°F34%1018.6 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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SW11SW9SW7SW7SW5SW5W4CalmCalmCalmW7NW8W8W9NW7
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Tide / Current Tables for Church Creek bridge, Wadmalaw River, South Carolina
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Church Creek bridge
Click for Map
Mon -- 12:34 AM EDT     Moonset
Mon -- 02:09 AM EDT     6.95 feet High Tide
Mon -- 07:10 AM EDT     Sunrise
Mon -- 07:40 AM EDT     0.80 feet Low Tide
Mon -- 11:00 AM EDT     Moonrise
Mon -- 02:28 PM EDT     5.68 feet High Tide
Mon -- 07:39 PM EDT     Sunset
Mon -- 07:47 PM EDT     0.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.86.66.96.65.53.72.110.81.32.23.44.55.35.65.64.83.520.90.6123.4

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Mon -- 12:33 AM EDT     Moonset
Mon -- 12:48 AM EDT     -0.00 knots Slack
Mon -- 04:11 AM EDT     -1.90 knots Max Ebb
Mon -- 07:09 AM EDT     Sunrise
Mon -- 07:23 AM EDT     0.00 knots Slack
Mon -- 09:57 AM EDT     1.27 knots Max Flood
Mon -- 10:59 AM EDT     Moonrise
Mon -- 12:53 PM EDT     -0.00 knots Slack
Mon -- 04:13 PM EDT     -1.63 knots Max Ebb
Mon -- 07:14 PM EDT     0.00 knots Slack
Mon -- 07:38 PM EDT     Sunset
Mon -- 10:17 PM EDT     1.46 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.4-0.1-0.9-1.6-1.9-1.7-1.1-0.30.411.310.4-0.1-0.7-1.3-1.6-1.5-1-0.20.51.11.41.3

Weather Map
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wmap_A
GEOS Local Image of Southeast    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (12,3,4,5)
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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 numerous 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.