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Marine Weather and Tides Rockville, SC Version 3.4

NOTICE 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.

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Sunrise 6:40AM

Sunset 6:21PM

Friday March 5, 2021 8:33 PM EST (01:33 UTC)

Moonrise 12:31AM

Moonset 11:02AM

Illumination 51%

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.

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7 Day Forecast for Marine Location Near Rockville, SC

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Area Discussion for - Charleston, SC

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FXUS62 KCHS 060034 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 734 PM EST Fri Mar 5 2021

SYNOPSIS. High pressure will prevail this weekend and through much of next week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/. Tonight: Aloft, a zonal flow will prevail during the first half of the night with high cirrus clouds associated with the left front quadrant of a passing h25 jet spreading across the region from the west. Although a light northeast sfc wind will be in place, high clouds will likely limit overall cooling potential early tonight, and even more so after midnight when mid-clouds arrive with an h5 shortwave rounding the southern base of a broad mid/upper lvl trough positioned across the Northeast United States. Despite a fair amount of moisture arriving in the mid-upper lvls along with mid-lvl forcing and upper-lvl divergence in place, model soundings along with the most recent chs sounding indicate a significant amount of dry air from the sfc to the 500mb lvl, which will likely keep all areas dry through the overnight period. In general, low temps should range in the low/mid 40s away from the coast with a few upper 30s possible across northern parts of Berkeley County.

SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/. High pressure will remain the dominant feature over the weekend and early next week. Dry weather is expected, with the possible exception being on Saturday when a few showers could brush the far southeast Georgia coast as a weak system passes well to the south. The main forecast concern for the period is the potential for frost or a freeze each morning. Favorable radiational cooling under clear skies and light winds will allow temperatures to fall into the low/mid 30s across most locations inland of the beaches. These temperatures are supportive of frost development, however relative humidity values are a bit low. Opted to maintain patchy frost in the forecast for now, but coverage could certainly be higher if conditions trend more favorably. In addition, freezing temperatures are possible across the far interior. Freeze Watches and/or Warnings could be needed. High temperatures will remain unseasonably cool as well, generally peaking in the mid to upper 50s over the weekend, then around 60/low 60s on Monday.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/. Models are in excellent agreement for the long term forecast. They keep high pressure off the coast, with it's periphery stretching into the Southeast U.S. Dry conditions with moderating temperatures are expected.

AVIATION /01Z SATURDAY THROUGH WEDNESDAY/. VFR conditions will prevail at both CHS and SAV terminals through 00Z Sunday.

Extended Aviation Outlook: VFR.

MARINE. Tonight: High pressure will persist across local waters late this evening and through the overnight period behind a cold front positioned south of the area. In general, east-northeast winds will average no higher than 10-15 kt early tonight, but are anticipated to increase slightly after midnight with the approach of a h5 shortwave from the west. Fair cold air advection across the waters will be in place, but 1000 mb geostrophic flow is rather limited (15- 25 kt). Given the setup, expect winds to turn northeast after midnight with a slight surge in wind speeds gusting up to 15-20 kt at times. Seas should range between 2-3 ft across nearshore waters and around 4 ft across offshore Georgia waters.

Saturday through Wednesday: Elevated northeast to north winds are expected over the weekend, especially Saturday night into Sunday morning with strong pressure rises and cold air advection. The best chance for Small Craft Advisories will be across the outer Georgia waters for 25 kt wind gusts. Opted to hold off on issuance as conditions appear marginal at this time. Winds and seas will improve early next week as high pressure moves over the area and the pressure gradient relaxes. No additional marine headlines are expected.

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



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

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
ACXS1 - ACE Basin Reserve, SC	9 mi	109 min	Calm	51°F			1019 hPa	42°F
FBIS1 - Folly Island, SC	22 mi	34 min	E 7 G 8	53°F			1019.9 hPa (+1.6)
41033	23 mi	26 min	E 12 G 16	55°F	56°F		1018.7 hPa
CHTS1	23 mi	46 min	NNE 2.9 G 4.1	52°F	58°F		1019.5 hPa
41029 - Capers Nearshore (CAP 2)	38 mi	26 min	E 5.8 G 9.7	53°F	56°F		1019.1 hPa
FPKG1 - 8670870 - Fort Pulaski, GA	51 mi	46 min	E 8.9 G 11	56°F	58°F		1019.2 hPa

Wind History for Charleston, SC

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9 PM

10 PM

11 PM

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4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

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12 PM

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Last 24hr

SW8 G11

SW5

W6

W6 G11

W3

NW4

NW4

N8

N8

N8 G12

N10 G13

N12 G17

N12 G15

N11 G16

N8 G15

N7 G14

E13 G16

E14

E10 G13

SE8

E9

E9

NE4 G7

NE3

1 day ago

W2

W4 G7

W4

W3 G6

W3

NW5

W5 G9

W3 G6

NW3

NW4 G7

NW4 G7

NW3 G6

NW4 G8

N6

N4

N5

SE5

SE6

E1 G7

S10

S5 G8

SW8 G11

SW6

SW8 G11

2 days ago

N9

N7 G10

N10 G13

N11 G15

NE14 G17

NE10 G14

N17

N9 G13

N12 G18

N15

N13 G18

N18 G23

NW10 G13

N14 G17

N13 G18

N14 G22

N11 G18

NW12 G17

NW10 G15

NW9 G14

NW10 G14

NW8 G11

NW5 G10

W2

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Charleston Executive Airport, SC	17 mi	39 min	N 0	9.00 mi	Fair	48°F	41°F	76%	1019.6 hPa
Beaufort County Airport, SC	22 mi	39 min	ENE 3	10.00 mi	Fair	52°F	43°F	72%	1019.3 hPa
Beaufort, Marine Corps Air Station, SC	24 mi	38 min	E 3	10.00 mi	Fair	53°F	42°F	66%	1019.3 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)

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Last 24hr

SW4

SW3

Calm

W5

Calm

Calm

NW4

N6

N4

N5

N6

N11

NE12 G18

N10 G15

NE11

E11

E15

E12

E9

E11

E7

E4

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Calm

1 day ago

Calm

Calm

Calm

W4

W4

NW4

W5

NW3

Calm

W4

NW4

NW4

N5

N7

NE7

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N7

SE7

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SW4

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SW6

2 days ago

NE6

NE7

N7

N10

N10

N7 G13

N12

NW7

N12

NW10 G21

N12

N11

NW8

N9 G17

NW16 G22

N14 G19

N12 G18

N10

NW10 G17

N7 G15

NW7 G13

NW4

NW4

Calm

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Tide / Current Tables for Steamboat Landing, Steamboat Creek, South Carolina

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Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina

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Weather Map

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GEOS Local Image of    EDIT
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.
Link to Loop

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