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Marine Weather and Tides Port Royal, 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.

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Sunrise 6:20AM

Sunset 8:19PM

Tuesday May 21, 2019 2:29 PM EDT (18:29 UTC)

Moonrise 10:09PM

Moonset 7:37AM

Illumination 92%

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 Port Royal, SC

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Area Discussion for - Charleston, SC

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Fxus62 kchs 211711 afdchs area forecast discussion national weather service charleston sc 111 pm edt Tue may 21 2019 Synopsis High pressure will build over the region this week and will linger into early next week. Near term through tonight No changes with this update. Cams still hint at some isolated convection along the sea breeze this afternoon, mainly in the charleston tri- county area. But it will be hard to get much given all the dry air in place. Hence, no changes to the pops for this afternoon. Otherwise, the thinking below remains the same. Today: strong upper ridging is forecast to build over the entire forecast area. Building NVA in the mid levels suggest sinking air with 500 mb temps also very warm (-6c to -7c). We think this environment will generally suppress diurnal convection this afternoon. We have a brief slight chance pop in the charleston tri-county area this afternoon, otherwise silent pops along the sea breeze down into ga. The sinking air aloft and light west flow in the boundary layer into early afternoon should result in a bit warmer temps today. Highs in the lower mid 90s should be common away from the beaches and barrier islands. Tonight: the center of 500 mb high pressure is forecast to settle over the forecast area overnight. At the surface a weak backdoor front is expected to drift through north carolina and perhaps reach the sc pee dee area late. We expected a few clouds at times but dry weather. Latest SREF output hints at some inland fog and stratus but we opted to allow for another look at it later today before placing any patchy fog in our forecast across inland areas. Short term Wednesday through Friday A weak backdoor front will attempt to push into the area on Wednesday before sfc high pressure prevails along the mid-atlantic to southeast coasts under a large mid upper lvl ridge of high pressure centered over the southeast united states. Although a few showers can not be ruled out within an onshore flow Wednesday afternoon, warm and dry conditions will likely prevail through the week as high pressure dominates the overall weather pattern. Given the setup, highs should warm into the lower 90s inland on Wednesday and Thursday while a more direct onshore sfc wind limits temps to the mid upper 80s east of the i-95 corridor. Temps should remain in the lower 80s along the immediate coast. By Friday, a light downslope flow will develop across the region, helping push temps into the middle 90s away from the coast under the persistent ridge aloft. Overnight lows should also be mild, ranging in the upper 60s lower 70s each night. Long term Friday night through Tuesday Hot and dry conditions should prevail this weekend into early next week as deep layered high pressure remains across the region. A slight southerly shift of the mid upper lvl ridge of high pressure will set up a northwest downslope flow across the region, producing some of the warmest temps across the area so far this year. This includes warmer conditions along the beaches given the potential for

a pinned seabreeze each day. In general, high temps should peak in the mid upper 90s away from the coast and in the upper 80s to potentially 90 degrees at the beaches. However, temps around 100 degrees are expected anywhere west of the i-95 corridor, especially Sunday and Monday afternoons. The combination of hot temps and sfc dewpts mixing out to the low mid 60s away from the coast suggests heat index values upwards to the 100-103 range, mainly west of the i- 95 corridor. However, the duration and peak of the event do not appear to warrant heat advisories at this time. Although dewpt temps should remain higher near the coast, temps do not appear to be warm enough for heat index values above the upper 90s. Low temps will remain mild each night, generally in the low mid 70s. Aviation 17z Tuesday through Saturday 18z tafs:VFR. Extended aviation outlook:VFR conditions are expected at both chs and sav terminals through late week. Marine The pressure pattern through tonight remains on the weak side. Gradients will continue to be driven by the sea breeze again this afternoon. A weak backdoor front will sag south over the carolinas late tonight, probably not reaching the charleston waters during this time frame. Winds will remain less than 15 kt through tonight with seas 2 to 3 ft. Wednesday through Sunday: a weak backdoor front will attempt to push into the area from the north Wednesday, helping produce easterly winds at or below 10-15 kts. Winds should remain at or below 10-15 kts while turning more south southeast Thursday, then south southwest this weekend as high pressure remains the dominant weather feature across the area. Seas could build up to 2-4 ft Wednesday, but should then gradually subside to 1-3 ft through the weekend. Climate Record high temps for may 27th station record high year(s) ------- ----------- ------- kchs 98 1989 kcxm 95 1962, 1926 ksav 98 1989, 1962 Chs watches warnings advisories Ga... None. Sc... None. Marine... None. Near term... short term... Dpb long term... Dpb aviation... marine... climate...

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
41033	5 mi	141 min	SW 9.7 G 12	78°F	78°F		1014.9 hPa
ACXS1 - ACE Basin Reserve, SC	16 mi	104 min	S 1	87°F			1015 hPa	71°F
FPKG1 - 8670870 - Fort Pulaski, GA	31 mi	47 min	SSW 5.1 G 8	84°F	78°F		1014.9 hPa
FBIS1 - Folly Island, SC	39 mi	89 min	SSW 11 G 14	80°F			1015.2 hPa (-0.4)	76°F
CHTS1	43 mi	41 min	S 9.9 G 12	83°F	79°F		1014.2 hPa

Wind History for Fort Pulaski, GA

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S7 G11

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Beaufort County Airport, SC	10 mi	34 min	SSW 4	7.00 mi	Fair	88°F	69°F	55%	1014.2 hPa
Hilton Head Island, Hilton Head Airport, SC	14 mi	39 min	S 8	10.00 mi	A Few Clouds	86°F	75°F	70%	1014.6 hPa

Wind History from ARW (wind in knots)

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Tide / Current Tables for Fripp Inlet Bridge, South Carolina

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Tide / Current Tables for Village Creek Cemetery, Morgan River, South Carolina

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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Charleston, SC (14,3,4,5)

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Ground Weather Radar Station Charleston, SC

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Disclaimer: 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.