Wednesday, January23, 2019 L-36.com


Marine Weather and Tides
Yemassee, 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.

Sunrise 7:20AMSunset 5:49PM Wednesday January 23, 2019 5:08 PM EST (22:08 UTC) Moonrise 8:53PMMoonset 9:23AM Illumination 91% 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 323 Pm Est Wed Jan 23 2019
.gale warning in effect through Thursday morning...
Tonight..S winds 15 to 20 kt with gusts to 25 kt, increasing to 20 to 25 kt with gusts to 35 kt after midnight. Seas 5 to 7 ft, building to 7 to 9 ft after midnight. A slight chance of showers this evening, then showers with a slight chance of tstms after midnight.
Thu..SW winds 25 to 30 kt with gusts to 40 kt, becoming W 15 to 20 kt with gusts to 25 kt in the afternoon. Seas 7 to 9 ft, subsiding to 5 to 7 ft in the afternoon. Showers with a slight chance of tstms in the morning.
Thu night..NW winds 15 kt with gusts to 20 kt. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight.
Fri..NW winds 10 to 15 kt. Seas 3 to 4 ft.
Fri night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Sat..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sat night..NW winds 5 kt. Seas 2 ft.
Sun..N winds 5 to 10 kt. Seas 2 ft.
Sun night..N winds 5 to 10 kt. Seas 2 ft.
Mon..NE winds 5 to 10 kt. Seas 2 ft.
Mon night..N winds 5 to 10 kt. Seas 1 foot. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 323 Pm Est Wed Jan 23 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A strong cold front will sweep through the region late tonight and move offshore Thursday morning. High pressure will then return through the weekend. Another cold front could impact the region by Tuesday.


7 Day Forecast for Marine Location Near Yemassee, SC
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location: 32.68, -80.74     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 232038
afdchs
area forecast discussion
national weather service charleston sc
338 pm est Wed jan 23 2019

Synopsis
A strong cold front will sweep through the region late tonight
and move offshore Thursday morning. High pressure will then
return through the weekend. Another cold front could impact the
region by Tuesday.

Near term until 6 am Thursday morning
The area will remain in the warm sector ahead of an approaching
cold front which will be pushing toward the coast near
daybreak. A few showers will move north across sc this evening
but most areas will remain dry until after midnight when showers
should begin affecting inland portions of southeast ga and the
csra. The rain will pick up in intensity and coverage thereafter
as upper forcing increases, with most locales away from the
coast likely to see 0.5-1 inch through 7 am. Although wind
fields will be quite strong (possibly 60-70 knots at 2000 feet
agl), instability will be limited and thus we are not expecting
much thunder. However, can't rule out a few rumbles of thunder
and will need to keep an eye on mesoscale trends as even heavy
showers will be capable of producing strong winds. Even outside
of the rain, winds will be breezy and could near advisory
levels of 40 mph, especially near the coast and on elevated
surfaces such as bridges and overpasses. Thus, motorists will
need to be prepared for this for the morning commute. Otherwise,
temperatures will likely be their lowest this evening and then
be fairly steady and even rise overnight ahead of the front due
to strong warm air advection before falling late inland after
the front passes.

Lake winds: we have raised a lake wind advisory for lake moultrie
starting late tonight for wind gusts over 25 knots, mainly near
the lake shores where low-level mixing will be greatest.

Short term 6 am Thursday morning through Saturday
Thursday and Thursday night: all of the active weather in the short
term period will take place Thursday morning as a strong cold front
pushes off the coast. Model guidance is in good agreement with the
cold front and its line of showers and isolated thunderstorms
aligned directly across the middle of the forecast area just after
sunrise. The line of showers and embedded isolated thunderstorms
will quickly move off the coast and land areas should be completely
precipitation free by noon. The window for any strong to marginally
severe storms will be only a couple of hours long, primarily for the
charleston tri-county region. Given the time of day and lack of
instability, the threat will be low. However, the background wind
field is quite impressive and strong gusty winds are expected along
and just ahead of the line. In fact, we could end up needing a wind
advisory along the coast for a few hours to account for wind gusts
up to 40 mph. Overall, the front and general setup looks quite
similar to this past Saturday night and Sunday morning. Skies will
clear through the afternoon hours and temperatures will hold nearly
steady from about mid morning onward. Highs will occur around or
just after sunrise ahead of the front with temperatures topping out
in the mid 60s. Winds will remain gusty through the afternoon, with
westerly winds topping out in the 20-25 mph range. Overnight, clear
and cold with lows falling into the low 30s inland to the mid upper
30s at the coast.

Friday through Saturday: high pressure will prevail across the
region through Saturday. The forecast is dry thanks to precipitable
water values falling to as low as 0.10" during the period.

Temperatures will be below normal, with highs in the low to mid 50s
and lows falling into the 20s for much of the area Friday night.

Long term Saturday night through Wednesday
Dry weather and moderating temperatures expected Saturday night
through Tuesday as high pressure gradually shifts east. A mostly
dry cold front will sweep through Tuesday night, followed by a
considerable cool down.

Aviation 20z Wednesday through Monday
Although brief restrictions from showers are possible through
around 00z, especially at kchs,VFR is expected until about
08-09z when CIGS lower to at least MVFR with ifr or lower likely
at times, as heavier showers move through in association with a
cold front. Breezy gusty southerly winds will veer to the west
around 12z. The strong low-level jet will lead to 25-30 kt
gusts at times, possibly even resulting in llws as early as 00z
just given the strength of the 1.5-2k ft winds which will be
peaking around 60-70 kt near 12z (mainly at kchs).

Extended aviation outlook:VFR conditions will prevail.

Marine
Tonight: hazardous conditions expected as a strong low-level jet
moves across the area ahead of a cold front which will be nearing
the coast toward daybreak. We think the the best prospects for gale
force gusts near 35 knots will be near the warmest waters of the
gulf stream and thus have gale warnings for a portion of the waters
with solid small craft advisories elsewhere. However, all waters
could see gale force wind gusts, especially associated with strong
showers and thunderstorms late tonight. Lastly, there is a small
risk of sea fog this evening ahead of the front as low-level
moisture increases but before winds increase substantially.

Thursday through Monday: strong winds and dangerous marine
conditions are expected for the first part of Thursday morning as a
strong cold front moves through the local waters. Gale warnings are
in effect everywhere other than the nearshore georgia waters and the
charleston harbor. Once the front moves through, conditions should
quickly improve by late morning such that the warnings will expire
and be replaced with small craft advisories. Westerly winds will
remain elevated Thursday afternoon and night, and seas will steadily
decrease as well. The small craft advisory could linger in the outer
georgia waters into Friday morning, but all others should come to an
end Thursday night. Thereafter, high pressure will build in and
prevail through the weekend. Winds and seas are expected to remain
below critical thresholds through that time.

Chs watches warnings advisories
Ga... None.

Sc... Lake wind advisory from 4 am to 10 am est Thursday for scz045.

Marine... Gale warning until 10 am est Thursday for amz350-352-374.

Small craft advisory from 7 pm this evening to 4 pm est
Thursday for amz354.

Small craft advisory from 10 pm this evening to 4 pm est
Thursday for amz330.

Near term... Rjb
short term... Bsh
long term... Jrl
aviation... Bsh rjb
marine... Bsh rjb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 17 mi83 min SSE 1 63°F 1020 hPa59°F
41033 33 mi60 min SSW 12 G 19 59°F 55°F1019.7 hPa
CHTS1 44 mi50 min SSE 13 G 17 64°F 54°F1019.5 hPa
FBIS1 - Folly Island, SC 45 mi128 min SSE 9.9 G 11 60°F 1021.5 hPa (-3.8)58°F
FPKG1 - 8670870 - Fort Pulaski, GA 45 mi50 min SE 7 G 11 64°F 52°F1019 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC14 mi2.2 hrsSSE 1010.00 miMostly Cloudy65°F61°F87%1020.5 hPa
Walterboro Lowcountry Regional Airport, SC17 mi93 minN 010.00 miOvercast64°F60°F88%1019.6 hPa
Beaufort County Airport, SC19 mi93 minSSW 65.00 miOvercast with Haze63°F59°F88%1019.6 hPa

Wind History from NBC (wind in knots)
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NE7NE10NE10NE6N6N7NE7NE5NE33NE4NE3CalmN5SW5SE5SE4SE7S10
1 day agoN7N7N7NE6NE6NE7NE7NE7NE8NE8NE8NE7NE10NE9--NE10NE12NE11NE8NE7NE8
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2 days agoW15
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W9W10NW8NW6NW5NW7NW6NW6NW7N6N12NE11NE8N9N11N11N9

Tide / Current Tables for Bluff Plantation, Combahee River, South Carolina
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Bluff Plantation
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Wed -- 01:16 AM EST     3.37 feet High Tide
Wed -- 07:21 AM EST     -0.77 feet Low Tide
Wed -- 07:22 AM EST     Sunrise
Wed -- 09:22 AM EST     Moonset
Wed -- 01:39 PM EST     3.82 feet High Tide
Wed -- 05:47 PM EST     Sunset
Wed -- 07:54 PM EST     -0.60 feet Low Tide
Wed -- 08:52 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.43.22.71.90.8-0.1-0.7-0.60.11.22.33.23.73.83.42.61.60.5-0.3-0.6-0.20.61.5

Tide / Current Tables for Sheldon, Huspa Creek, Whale Branch, South Carolina
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Sheldon
Click for Map
Wed -- 05:22 AM EST     -1.62 feet Low Tide
Wed -- 07:22 AM EST     Sunrise
Wed -- 09:22 AM EST     Moonset
Wed -- 11:45 AM EST     10.03 feet High Tide
Wed -- 05:47 PM EST     Sunset
Wed -- 05:55 PM EST     -1.26 feet Low Tide
Wed -- 08:53 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.67.35.22.60.1-1.5-1.30.43.15.98.39.7109.17.14.51.7-0.5-1.3-0.41.64.16.38

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.
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Wind Forecast for Charleston, SC (17,4,5,8)
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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 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.