Thursday, January20, 2022
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Marine Weather and Tides
Charleston, SC

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:19AMSunset 5:42PM Thursday January 20, 2022 6:15 PM EST (23:15 UTC) Moonrise 8:20PMMoonset 9:19AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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- 338 Pm Est Thu Jan 20 2022
Tonight..NW winds 10 kt, becoming N late this evening, then increasing to 15 to 20 kt after midnight. Waves 1 to 2 ft. Rain.
Fri..N winds 15 kt with gusts to 20 kt. Rain.
Fri night..N winds 15 kt with gusts to 20 kt. Rain or freezing rain in the evening, then a chance of freezing rain or rain after midnight.
Sat..N winds 10 to 15 kt. A slight chance of rain or freezing rain in the morning.
Sat night..N winds 10 kt.
Sun..NW winds 5 to 10 kt.
Sun night..W winds 5 to 10 kt.
Mon..W winds 5 kt.
Mon night..SW winds 5 kt. A slight chance of showers.
Tue..NW winds 5 kt. A chance of showers.
Tue night..N winds 5 to 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 53 degrees.
AMZ300 338 Pm Est Thu Jan 20 2022
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will develop along the front Friday then move northeast Friday night and Saturday. This low will produce a period of freezing rain in some areas. Dry high pressure will then build from the west Saturday through Monday. Low pressure could affect the area next Tuesday, followed by another cold front by the middle of next week.


7 Day Forecast for Marine Location Near Charleston, SC
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location: 32.78, -79.93     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 202108 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 408 PM EST Thu Jan 20 2022

SYNOPSIS. Low pressure will develop along the front Friday then move northeast Friday night and Saturday. This low will produce a period of freezing rain in some areas. Dry high pressure will then build from the west Saturday through Monday. Low pressure could affect the area next Tuesday, followed by another cold front by the middle of next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. The mid-levels will consist of southwest flow overhead. Meanwhile, a trough axis will stretch from the Great Lakes Region down into the Southern Plains. At the surface, a cold front will move through our area from west to east this evening, becoming located offshore overnight where it's expected to transition into a stationary front. Meanwhile, strong high pressure will be located over the northern MS Valley.

Radar imagery indicates a decent rain shield associated with the front moving over the Southeast U.S. All of the synoptic models and the CAMs are in great agreement moving this rain over our area from west to east this evening, then gradually shifting it offshore after midnight. Our entire is expected to receive 0.1-0.3" QPF tonight, so we have categorical POPs to account for this.

Behind the front, winds will transition to the northwest, then the north northeast by daybreak Friday. These winds will usher in much colder temperatures. In fact, temperatures could fall to 33 or 34 degrees F over portions of Berkeley County, far inland Dorchester County, and far inland Colleton County. It's possible there could be a 1-2 hour window of rain or freezing rain in these locations right around daybreak Friday. But given the uncertainty in areal coverage (and the fact that if it's 1-2 degrees warmer it'll drastically lower this risk), we opted to not have any Winter Weather Advisories for these counties late tonight. If any freezing rain does occur, the highest probabilities appear to be along and north of Lake Moultrie in Berkeley County.

Overnight lows will range from near freezing over Berkeley County, to the mid to upper 30s as one heads south and closer to the beaches. South of I-16, temperatures should bottom out near 40 degrees.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/. High impact weather potential: Freezing rain/accumulating ice possibilities Friday into Saturday. Low wind chills Friday night/early Saturday.

Friday: A cold front positioned off the coastline will be the focus for isolated showers along the immediate coastline to start the day. A coastal low pressure system is forecast to develop over northern Florida and then trek up the eastern seaboard through the day. As the day progresses a mid to upper level trough will swing through the eastern CONUS, providing the forcing necessary for precipitation to form across most, if not all, the forecast area by nightfall. Meanwhile, a rather cold airmass will overtake the region, with temperatures dropping below freezing by mid afternoon in inland SE SC and by the evening hours along the coastline. Precipitation is expected to begin as rain and then switch over to freezing rain throughout the afternoon. A Winter Weather Advisory is in effect for several SC counties beginning Friday afternoon. Freezing rain will first affect inland SE SC before progressing southward towards the Savannah River. Model soundings are supportive of freezing rain being the main precipitation type, with a solid warm nose and surface temperatures at or below freezing. Temperatures Friday will be warmest in the morning hours and cooling as the day progresses as the cold air mass overtakes the region.

Friday Night: Freezing rain and rain will continue through the overnight hours across SE SC and some inland SE GA counties, with the Winter Weather Advisory expiring at daybreak Saturday. Temperatures overnight will be quite chilly, with lows expected in the mid to upper 20s inland and in the low 30s closer to the coast and across SE GA. Northerly winds will persist through the overnight, producing wind chills in the upper teens to low 20s. Conditions are currently forecast to remain below Wind Chill Advisory levels, however trends and conditions will need to be monitored, especially along inland SE SC.

Saturday: As the coastal low continues its northward progression and the cold front moves even further into the Atlantic waters, dry air will overtake the region rather quickly in the early morning hours. This will shut off most, if not all, precipitation by daybreak. A period of drizzle cannot be ruled out before noontime, however, as the lower atmosphere remains saturated just enough to precipitate a little more. Temperatures will remain very cold, with daytime highs in the low 40s expected. Once again the northerly winds will remain elevated, making conditions feel much colder.

Saturday night and Sunday: Strong high pressure will build into the region overnight Saturday and a quite chilly night will occur due to clear skies and calm winds. The main forecast challenge will be lingering moisture over the waters. For now, have slight chance to chance POPs through midnight. Otherwise, low temperatures will be in the low to mid 20s. A quiet weather day is then expected on Sunday with clear skies and highs in the upper 40s to low 50s.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. Stretch of cool/cold below normal temperatures will persist through the upcoming week. Dry high pressure remains in control into Monday. Another system sliding northeastward out of the Gulf and interact with a cold front arriving from the northwest and bring another chance of precip (rain) to the region late Monday night through Tuesday. Drying out thereafter for the balance of the week.

AVIATION /21Z THURSDAY THROUGH TUESDAY/. 18Z TAFs: VFR will prevail this afternoon. Light rain associated with an approaching cold front will overspread the area from west to east this evening. The front will move through our area tonight, then becoming stationary offshore. IFR ceilings are expected late this evening through the end of the TAF time period. Additionally, cold advection behind the front will lead to gusty winds from daybreak Friday through the end of the TAF time period.

Extended Aviation Outlook: Friday and Saturday: Flight restrictions, IFR or possibly lower, are likely in showers Friday afternoon. Freezing rain is possible at all terminals Friday night, especially KCHS and KJZI, where some ice accumulations are forecast. Gusty northerly winds are also anticipated Friday into Saturday.

Saturday night through Tuesday: VFR will prevail. Cloud cover will gradually increase overnight Monday as a storm system approaches the area. Flight restrictions will be possible in showers on Tuesday.

MARINE. Tonight: A cold front will move through the waters this evening, then offshore overnight, where it will transition to a stationary front. Winds will shift to the NW behind the front this evening, then to the NNE after midnight. The combination of an enhanced surface pressure gradient and strong cold air advection behind the front will yield increasing winds overnight. Small Craft Advisories are in effect for our SC waters during this time period. Seas will respond by building to 4-5 ft by daybreak Friday in these locations. Elsewhere, conditions will be just below advisory criteria, including the Charleston Harbor.

Friday and Saturday: A coastal low pressure system will progress up the eastern seaboard, producing hazardous marine conditions. Gusty northerly winds will prevail, with Small Craft Advisories in effect for all coastal waters outside the Charleston Harbor. Seas will average 3 to 4 feet, building to 6 to 7 feet in the 20-60nm GA waters and the offshore Charleston waters.

Saturday night through Tuesday: A Small Craft Advisory for the outer Georgia waters will remain in effect through Sunday afternoon due to elevated seas. Thereafter, variable winds will be less than 15 knots with seas 2 to 4 feet.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Winter Weather Advisory from 1 PM Friday to 7 AM EST Saturday for SCZ045. Winter Weather Advisory from 3 PM Friday to 7 AM EST Saturday for SCZ040-042>044-050-052. MARINE . Small Craft Advisory from 4 AM Friday to 8 PM EST Saturday for AMZ352. Small Craft Advisory from 1 AM Friday to 8 PM EST Saturday for AMZ350. Small Craft Advisory from 7 AM Friday to 8 PM EST Saturday for AMZ354. Small Craft Advisory from 7 AM Friday to 4 PM EST Sunday for AMZ374.



NEAR TERM . SHORT TERM . LONG TERM . AVIATION . MARINE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 0 mi46 min NNW 4.1G5.1 64°F 54°F1015.8 hPa
FBIS1 - Folly Island, SC 7 mi76 min SSW 5.1G6 58°F 1017.2 hPa (-0.0)
41029 - Capers Nearshore (CAP 2) 16 mi68 min S 7.8G9.7 57°F 54°F1016.7 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi91 min 0 63°F 1017 hPa56°F
41033 43 mi68 min WSW 5.8G7.8 58°F 55°F1017.1 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi36 min W 9.7G9.7 66°F 69°F1017.1 hPa60°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Last 24 hrS2
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W9
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G22
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G16
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi2.3 hrsSSW 510.00 miFair64°F55°F73%1016.6 hPa
Charleston, Charleston Air Force Base, SC10 mi2.3 hrsWNW 610.00 miOvercast69°F51°F53%1016.1 hPa
Mount Pleasant Regional-Faison Field, SC11 mi2.3 hrsN 010.00 miFair68°F57°F69%1016.3 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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Last 24 hr00000000S30S3000S4SW6SW7SW13SW10
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1 day ago000000000000000000S6SW8SE6S7S5S4
2 days agoNW12
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W9NW7W5W7W4NW7W30W3W3NW64N6NE7NE5N5S8S7S6

Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Thu -- 03:06 AM EST     -0.17 feet Low Tide
Thu -- 07:20 AM EST     Sunrise
Thu -- 09:18 AM EST     Moonset
Thu -- 09:19 AM EST     5.50 feet High Tide
Thu -- 03:41 PM EST     0.19 feet Low Tide
Thu -- 05:41 PM EST     Sunset
Thu -- 08:20 PM EST     Moonrise
Thu -- 09:35 PM EST     4.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston, South Carolina, Tide feet
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2.4
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1.2
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0.3
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-0.2
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0.1
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5.5
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5.4
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4.7
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3.5
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2.3
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1.1
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0.4
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0.2
5
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0.8
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1.9
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3.1
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4
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4.5
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4.6
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4.1


Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 12:42 AM EST     -2.11 knots Max Ebb
Thu -- 03:36 AM EST     0.00 knots Slack
Thu -- 06:21 AM EST     1.83 knots Max Flood
Thu -- 07:20 AM EST     Sunrise
Thu -- 09:18 AM EST     Moonset
Thu -- 09:58 AM EST     -0.00 knots Slack
Thu -- 01:09 PM EST     -2.33 knots Max Ebb
Thu -- 04:20 PM EST     0.00 knots Slack
Thu -- 05:40 PM EST     Sunset
Thu -- 06:46 PM EST     1.43 knots Max Flood
Thu -- 08:20 PM EST     Moonrise
Thu -- 10:11 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston Harbor Entrance, South Carolina Current, knots
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-0
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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