Wednesday, December11, 2019
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Marine Weather and Tides
Hollywood, SC

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:10AMSunset 5:15PM Wednesday December 11, 2019 6:42 AM EST (11:42 UTC) Moonrise 5:03PMMoonset 6:28AM Illumination 100% Phase: Full Moon; Moon at 14 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- 313 Am Est Wed Dec 11 2019
.small craft advisory in effect from late tonight through Thursday evening...
Today..N winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers this morning.
Tonight..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Thu..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers in the afternoon.
Thu night..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers in the evening, then a chance of showers after midnight.
Fri..NE winds 10 to 15 kt with gusts to 20 kt, becoming E 5 to 10 kt in the afternoon. Showers.
Fri night..Variable winds 5 kt. Showers likely.
Sat..W winds 5 to 10 kt. A chance of showers.
Sat night..W winds 10 to 15 kt.
Sun..W winds 5 to 10 kt.
Sun night..S winds 5 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 58 degrees.
AMZ300 313 Am Est Wed Dec 11 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Strong high pressure will build north of the area through Thursday. A low pressure system will impact the area late week, followed by a return to high pressure during the latter half of the weekend. A cold front will cross the area by the middle of next 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 110920 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 420 AM EST Wed Dec 11 2019

SYNOPSIS. Strong high pressure will build north of the area through Thursday. A low pressure system will impact the area late week, followed by a return to high pressure during the latter half of the weekend. A cold front will cross the area by the middle of next week.

NEAR TERM /THROUGH TONIGHT/. Pre-dawn: The Cold front had moved off the coast since midnight and temps were gradually falling in the wake of the wind shift. Most of the post frontal rains have been across the CSRA and SC Midlands and some of these rains were spreading into our northern inland zones to the east of I-95 along and north of the Savannah River. There is still a chance for some light measurable rains brushing the coastal corridor over the next few hours. The cooler air rushing in was shallow and this was resulting in expanding low clouds across the area. Winds veering northerly by daybreak all areas.

Today: A sharp contrast in temperatures today as the cold front moves further offshore and down into south Florida. Modified continental air will encompass the region today with temps unlikely unable to climb out of the 50s most all areas later this morning into the afternoon. Lower clouds are expected to disperse late morning into the afternoon, however there should be a fairly widespread canopy of high clouds streaming in from the southwest in the entrance region of the upper jet extending northeastward from North GA. Dry weather is expected after the early morning rains exit across SC zones.

Tonight: Strong high pressure near 1040 mb will build into the Mid Atlantic and northeast states. The high will strengthen across the forecast area overnight with significant gradients resulting in persistent breezes inland and breezy to windy conditions on the beaches and barrier islands. Cooler air will continue to filter in with lows in the mid 30s north to the lower 40s south of Savannah. Some mid to high levels clouds will persist but dry weather anticipated with the drier layers below 700 mb.

SHORT TERM /THURSDAY THROUGH SATURDAY/. A wedge of high pressure will prevail inland on Thursday, while a coastal trough develops offshore. Moisture will be increasing from the south, and a few showers will be possible later in the day, mainly across the southern zones. Areas further north should remain precip-free as there is still a good bit of dry air noted in model soundings. Otherwise, a tight pressure gradient will result in gusty northeast winds, primarily along the coast. It will be a cool day in the wedge regime, with highs topping out in the mid 50s. Lows Thursday night will range from the low 40s inland to around 50 at the coast.

The forecast gets more complex as we head into the weekend. The wedge will weaken Thursday night through Friday in response to a wave of low pressure ejecting out of the Gulf of Mexico. The low is forecast to lift northeast over or near the area. The track of the low is a bit uncertain given continued spread in model solutions, however ingredients are present for a wet day. Strong isentropic ascent will overspread the area, in addition to forcing from shortwave energy and upper divergence. These features will combine with PWats of around 1.5 inches to support rain chances in the 80- 90% range. The track of the low will have influence on where the heaviest rain sets up, but average rainfall totals appear to be near an inch through Friday night. There could be somewhat of a lull in precipitation Friday evening, before models hint at another band making a run for our inland zones towards Saturday morning. Rain chances were kept in the 50-60% for the overnight hours. Given the pattern, the temperature forecast will be tricky. Current forecast features highs ranging from the mid 50s inland to low 60s near the coast. Lows Friday night in the upper 40s to mid 50s.

The bulk of the precipitation is expected to exit the area by mid- day Saturday as much drier air moves in. Highs are forecast to be in the mid 60s.

LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/. Models are in pretty good agreement through the long term period. High pressure will build in for the latter half of the weekend, bringing dry conditions and plenty of sunshine. On Monday, the forecast area will become positioned in the warm sector ahead of low pressure approaching from the west. The day should remain rain-free as best moisture and forcing remains out of the area. The low and associated cold front is progged to cross on Tuesday, bringing the next chance of rain. Temperatures through the period are expected to be above normal.

AVIATION /09Z WEDNESDAY THROUGH SUNDAY/. MVFR cigs expected for the overnight into mid morning with a potential for some cigs below 1 kft at times in the wake of a cold front. Cigs should lift to VFR late morning and early afternoon as much drier air moves over the region. Winds will shift to N and NNE and gust to near 20 kt at times today.

Extended Aviation Outlook: Flight restrictions are likely Thursday night through Friday night as a low pressure system impacts the area. VFR is expected to return Saturday afternoon.

MARINE. Strong high pressure building in from the northwest today and then from the north tonight, will result in strengthening north to northeast winds along with building seas. Small Craft Advisory conditions are expected all waters. The CHS Harbor may reach marginal SCA levels for a period this morning and then relax a bit this afternoon before gradients tighten overnight. We have issued a SCA in the Charleston Harbor later tonight when conditions look most solid. We also opted for a Gale Watch for 20-60 NM GA waters after midnight tonight for increasing potential for frequent gusts to 34-35 kt. Building seas through tonight are forecast to increase to 6-8 ft near shore and 9-11 ft offshore prior to daybreak on Thursday.

Thursday through Monday: Solid Small Craft Advisory conditions will be ongoing at the start of the period for all coastal waters, including the Charleston Harbor. The potential for frequent gale- force gusts will continue into Thursday, and the Gale Watch for the outer Georgia waters will remain in effect through the day. The Gale Watch might need to be expanded to include other waters, but at this time confidence was not high enough. Winds will improve drastically Thursday night into Friday, however seas will take longer to subside. A low pressure system will lift northeast over or near the area late week. There are still some differences in models regarding the track of the low, but at this time conditions appear to be below advisory conditions. The exception could be over the outer Georgia waters where 6 foot seas persist. No concerns are expected late weekend into early next week as high pressure returns.

TIDES/COASTAL FLOODING. Elevated tide cycles are expected late week due to increasing astronomical influences with the full moon on Thursday and strong northeasterly winds. Minor to potentially moderate coastal flooding will be possible with the morning high tides Thursday through Saturday. Coastal Flood Advisories could be required. Also of note, if significant rainfall occurs around the morning high tides Friday and Saturday, the potential for flooding of poor drainage areas could increase along the coast.

EQUIPMENT. The KCLX radar will remain out of service until further notice.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory from 1 AM to 7 PM EST Thursday for AMZ330. Small Craft Advisory from noon today to 1 PM EST Friday for AMZ352-354. Small Craft Advisory from 7 AM this morning to 10 PM EST Friday for AMZ350. Gale Watch from late tonight through Thursday evening for AMZ374. Small Craft Advisory from 7 AM this morning to 1 AM EST Thursday for AMZ374.

NEAR TERM . SHORT TERM . ETM LONG TERM . ETM AVIATION . ETM MARINE . ETM TIDES/COASTAL FLOODING . ETM EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 9 mi55 min NNW 12 G 18 57°F 58°F1022.8 hPa
FBIS1 - Folly Island, SC 10 mi43 min NNW 13 G 17 56°F 1023.2 hPa (+3.7)54°F
41029 - Capers Nearshore (CAP 2) 24 mi95 min N 18 G 23 57°F 57°F1021.4 hPa
ACXS1 - ACE Basin Reserve, SC 24 mi118 min NNW 5.1 58°F 1022 hPa56°F
41033 36 mi95 min NNE 18 G 25 57°F 58°F1022 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi43 min 21 G 27 72°F1021 hPa (+2.4)

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC4 mi48 minNNW 3 G 1710.00 miOvercast55°F51°F88%1023 hPa
Charleston, Charleston Air Force Base, SC13 mi1.8 hrsN 1410.00 miOvercast56°F51°F84%1021.7 hPa
Mount Pleasant Regional-Faison Field, SC19 mi48 minNNW 9 G 1410.00 miOvercast55°F51°F88%1022.7 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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1 day agoNE5CalmN4NE3CalmCalmS5SE4SE5S5S6SW5S4S6S9
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2 days agoN7N6N6N7N8N8N12N10N7N4CalmN4N4N5NE5N4NE4CalmNE5NE5NE4NE3NE5NE4

Tide / Current Tables for Church Creek bridge, Wadmalaw River, South Carolina
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Church Creek bridge
Click for Map
Wed -- 01:45 AM EST     -0.04 feet Low Tide
Wed -- 06:28 AM EST     Moonset
Wed -- 07:12 AM EST     Sunrise
Wed -- 09:00 AM EST     7.83 feet High Tide
Wed -- 02:23 PM EST     0.27 feet Low Tide
Wed -- 05:03 PM EST     Moonrise
Wed -- 05:14 PM EST     Sunset
Wed -- 09:19 PM EST     6.42 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.90.4-00.623.75.46.77.57.87.25.63.51.60.40.41.32.645.266.46.25

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Wed -- 01:16 AM EST     0.00 knots Slack
Wed -- 03:52 AM EST     1.90 knots Max Flood
Wed -- 06:27 AM EST     Moonset
Wed -- 07:11 AM EST     Sunrise
Wed -- 07:41 AM EST     -0.00 knots Slack
Wed -- 10:53 AM EST     -2.57 knots Max Ebb
Wed -- 02:02 PM EST     0.00 knots Slack
Wed -- 04:15 PM EST     1.55 knots Max Flood
Wed -- 05:02 PM EST     Moonrise
Wed -- 05:13 PM EST     Sunset
Wed -- 07:46 PM EST     -0.00 knots Slack
Wed -- 11:01 PM EST     -2.35 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.3-0.30.81.61.91.61.30.7-0.4-1.5-2.3-2.6-2.1-1.1-011.51.410.6-0.2-1.2-2-2.3

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (6,6,7,8)
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Ground Weather Radar Station Charleston, SC
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