Friday, September22, 2017 L-36.com


Marine Weather and Tides
Talahi Island, GA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:12AMSunset 7:21PM Friday September 22, 2017 8:15 PM EDT (00:15 UTC) Moonrise 8:24AMMoonset 8:07PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 350 Pm Edt Fri Sep 22 2017
.small craft advisory for hazardous seas in effect from Saturday morning through Tuesday evening...
Tonight..E winds 10 kt. Seas 3 to 4 ft, building to 4 to 5 ft after midnight.
Sat..NE winds 15 kt. Seas 4 to 6 ft. A slight chance of showers and tstms in the afternoon.
Sat night..NE winds 10 to 15 kt. Seas 5 to 7 ft.
Sun..NE winds 15 kt. Seas 5 to 7 ft.
Sun night..NE winds 10 to 15 kt. Seas 5 to 7 ft.
Mon..N winds 10 kt. Seas 4 to 6 ft.
Mon night..NE winds 5 to 10 kt, becoming nw after midnight. Seas 4 to 6 ft.
Tue..N winds 5 to 10 kt. Seas 4 to 5 ft.
Tue night..NW winds 5 to 10 kt. Seas 4 to 5 ft.
Wed..N winds 5 to 10 kt. Seas 3 to 4 ft.
Wed night..W winds 5 to 10 kt. Seas 3 to 4 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 350 Pm Edt Fri Sep 22 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through this weekend. The high will weaken and shift inland as hurricane maria tracks northward off the southeast u.s. Coast through the first half of next week. A cold front could approach the forecast area late next week.

7 Day Forecast for Marine Location Near Talahi Island, GA
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location: 32.12, -80.99     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 222355
afdchs
area forecast discussion
national weather service charleston sc
755 pm edt Fri sep 22 2017

Synopsis
High pressure will prevail through this weekend. The high will
weaken and shift inland as hurricane maria tracks northward off
the southeast u.S. Coast through the first half of next week. A
cold front could approach the forecast area late next week.

Near term until 6 am Saturday morning
As of 750 pm: radar rainfall estimates indicate that a fair
amount of coverage across charleston, dorchester, and portions
of colleton counties. Nam12 sfc condensation pressure deficits
keep values of 5 mbs or less just inland of the coastal
counties. I will keep a mention of patchy fog over areas of wet
soil and lower pressure deficits.

As of 535 pm: latest SPC normalized CAPE analysis indicated that
a west to east line of .1 units has moved south across the chs
metro area. Areas to the south of the line should continue to
see schc to chc coverage with isolated thunderstorms. Based on
latest runs of cams, convection should dissipate shortly after
sunset. I will update the forecast to adjust pop and sky through
the late evening hours.

Previous discussion:
this evening and tonight: sfc high pressure will remain
centered north of the area while a mid upper lvl trough of low
pressure lingers over the southeast united states. Abundant sfc
heating along with onshore winds driving pwats around 1.5 inches
over land will continue to fuel late afternoon early evening
convection over parts of the area, mainly along a seabreeze
circulation currently near the southeast south carolina coast
and well inland where an ongoing cluster of thunderstorms
remains just out of the forecast area north of i-16. Weak shear,
weak lapse rates and lower SBCAPE and dcape than the previous
day suggest sub-severe thunderstorm activity in the area.

However, a few strong, but sub-severe wind gusts are possible
with thunderstorms before sunset. Showers thunderstorms could
linger into early overnight hours, but the bulk of precip
activity will likely diminish within an hour or two of sunset
due to a loss of daytime heating. Diminishing cloud cover should
support decoupling winds and another fair radiational cooling
night. Guidance suggests temps will dip into the mid upper 60s
inland to lower 70s near the coast. These temps along with
dewpts remaining in the mid upper 60s inland to around 70 closer
to the coast suggests the potential of fog developing over some
locations after midnight, especially where showers and or
thunderstorms are experienced this evening.

Short term 6 am Saturday morning through Monday
Large scale ridging will be in place over the eastern third of the
country while maria passes well offshore. Surface high pressure will
be located to our north, generating mainly NE flow. The end will
result will be fairly tranquil weather for our area. Models indicate
some showers and or thunderstorms across the southern half of our
area Saturday. But we're mainly keeping pops in the slight chance
category because moisture and instability is not impressive. The
northern half should be dry. Sunday and Monday are expected to be
completely dry for the area as the high becomes more dominant.

Despite NE flow, thicknesses support above normal temperatures with
highs in the mid to upper 80s and lows in the mid to upper 60s,
except around 70 degrees at the beaches.

Long term Monday night through Friday
Inland high pressure will persist through early next week while
hurricane maria is forecast to remain offshore of the southeast u.S.

Coast as it tracks north through the middle of next week. While some
showers could skirt coastal areas early next week as maria passes
by, persistent, weak NVA under high pressure should help
mitigate precipitation chances. For much of the week, mainly dry
conditions are anticipated with temperatures likely remaining
above normal.

Aviation 00z Saturday through Wednesday
Evening convection dissipated just prior to the 0z tafs. Radar
rainfall estimates indicate that rainfall did occur within a few
miles of kchs and ksav, but the terminals remained dry. Nam12
sfc condensation pressure deficits keep values of 5 mbs or less
just inland of the coastal counties. I will use a tempo to
highlight MVFR fog between 8z to 12z. Light winds and fair
weather CU should persists through the daylight hours.

Extended aviation outlook: mainlyVFR conditions expected. Low
probability for brief flight restrictions in early morning fog
and or low clouds Saturday morning at either terminal. Low
probability for brief restrictions due to isolated shower and
thunderstorm Saturday afternoon evening, primarily affecting
ksav.

Marine
This evening and tonight: high pressure will prevail over the
coastal waters, but a fair pressure gradient will persist through
tonight while hurricane maria tracks north well off the southeast
coast. In general, east northeast winds will be no higher than
10-15 kt. Long period swells from maria will also increase over
all waters through tonight, supporting a small craft advisory
for hazardous seas in offshore georgia waters through the night
and in northern south carolina waters late tonight. Seas should
peak near 5-7 ft in offshore georgia waters and 4-6 ft in northern
south carolina waters late tonight. Elsewhere, seas ranging between
2-3 ft will build up to 3-5 ft after midnight.

Saturday through Wednesday: swell from distant hurricane maria will
continue propagating through our waters during this time period.

Models indicate the highest wave heights should take place Sunday,
especially across the offshore ga waters. Small craft advisories
will remain in place most of this time period, gradually expiring by
the middle of next week as seas subside. Otherwise, winds are not
expected to be an issue.

Rip currents: swell from offshore hurricane maria will slowly build
at the beaches. This results in a moderate risk of rip currents
through Saturday. An elevated risk of rip current will persist
through early to mid next week.

Tides coastal flooding
Powerful surf created by offshore hurricane maria will drive
significant wave run-up, which could cause further beach erosion
this weekend into early next week. High surf advisories may be
required. Also, the potential for shallow salt water flooding
will persist through early next week around the times of high
tide, particularly along the south carolina coast.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory for hazardous seas from 11 am Saturday to
8 pm edt Tuesday for amz352.

Small craft advisory for hazardous seas until 4 pm edt
Wednesday for amz374.

Small craft advisory for hazardous seas from 6 am Saturday to
4 pm edt Wednesday for amz350.

Small craft advisory for hazardous seas from 11 am Saturday to
5 pm edt Monday for amz354.

Near term... Ned
short term... Ms
long term... Jmc
aviation... Dpb ms
marine... Dpb ms
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi45 min ESE 8.9 G 9.9 80°F 81°F1015.6 hPa
41033 33 mi67 min E 9.7 G 14 80°F 1019.2 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi90 min Calm 77°F 1015 hPa72°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 50 mi85 min ENE 12 G 14 80°F 81°F4 ft1014.6 hPa (+0.0)73°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA11 mi17 minE 510.00 miFair78°F71°F80%1014.5 hPa
Savannah-Hilton Head International Airport, GA11 mi22 minESE 910.00 miPartly Cloudy79°F71°F77%1014.9 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi25 minN 010.00 miClear79°F73°F84%1015.6 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmCalmSE4CalmCalmCalmCalmCalmN4N3N3NE5NE5NE6E6E8E10E6E10E8E8E8E5
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3CalmN3CalmCalmE4SE8SE7S6S4S4
2 days agoSE3SE3CalmS3S5CalmCalmCalmSW3SW4W4CalmSW3SW5SW5S3SW3W6CalmNW4NE12
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Tide / Current Tables for Turnbridge Landing, Salt Water Creek, South Carolina
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Turnbridge Landing
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Fri -- 05:12 AM EDT     0.16 feet Low Tide
Fri -- 07:12 AM EDT     Sunrise
Fri -- 09:23 AM EDT     Moonrise
Fri -- 11:58 AM EDT     8.43 feet High Tide
Fri -- 05:40 PM EDT     0.33 feet Low Tide
Fri -- 07:20 PM EDT     Sunset
Fri -- 09:07 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.37.25.43.21.20.20.51.73.55.478.18.47.96.54.52.30.70.41.22.84.76.47.6

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Fri -- 02:36 AM EDT     -2.18 knots Max Ebb
Fri -- 05:09 AM EDT     0.01 knots Slack
Fri -- 07:11 AM EDT     Sunrise
Fri -- 07:44 AM EDT     2.23 knots Max Flood
Fri -- 09:23 AM EDT     Moonrise
Fri -- 11:34 AM EDT     -0.00 knots Slack
Fri -- 03:09 PM EDT     -2.36 knots Max Ebb
Fri -- 05:42 PM EDT     0.00 knots Slack
Fri -- 07:19 PM EDT     Sunset
Fri -- 08:09 PM EDT     2.15 knots Max Flood
Fri -- 09:07 PM EDT     Moonset
Fri -- 11:48 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-1.8-2.1-2.1-1.5-0.21.222.21.91.40.6-0.5-1.5-2.1-2.4-2.1-10.41.72.121.50.8

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (20,4,5,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.