Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Isle of Hope, GA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:12AMSunset 7:44PM Thursday March 30, 2017 4:18 PM EDT (20:18 UTC) Moonrise 8:13AMMoonset 9:44PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm...including Grays Reef National Marine Sanctuary- 329 Pm Edt Thu Mar 30 2017
Tonight..S winds 10 to 15 kt. Seas 3 ft. A slight chance of showers and tstms.
Fri..S winds 10 to 15 kt...becoming sw 15 to 20 kt in the afternoon. Seas 4 to 5 ft. A slight chance of showers and tstms.
Fri night..W winds 10 to 15 kt. Seas 3 to 4 ft... Subsiding to 2 to 3 ft after midnight.
Sat..W winds 5 to 10 kt...becoming sw in the afternoon. Seas 2 to 3 ft.
Sat night..SW winds 5 to 10 kt...becoming nw after midnight. Seas 2 ft.
Sun..E winds 5 to 10 kt. Seas 1 to 2 ft.
Sun night..SE winds 10 kt. Seas 2 to 3 ft.
Mon..SE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers and tstms.
Mon night..S winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers with a slight chance of tstms.
Tue..SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.
Tue night..W winds 5 to 10 kt. Seas 2 to 3 ft. Mariners are reminded that winds and seas can be higher in and near tstms.
AMZ300 329 Pm Edt Thu Mar 30 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A warm front will move northward through the region tonight followed by a cold front crossing through Friday night. High pressure is expected to bring dry conditions this weekend. Unsettled weather returns on Monday, possibly lasting into Tuesday. Dry weather should then return during the middle of next week.

7 Day Forecast for Marine Location Near Isle of Hope, GA
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location: 31.98, -81.05     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 301959
afdchs
area forecast discussion
national weather service charleston sc
359 pm edt Thu mar 30 2017

Synopsis
A warm front will move northward through the region tonight followed
by a cold front crossing through Friday night. High pressure is
expected to bring dry conditions this weekend. Unsettled weather
returns on Monday, possibly lasting into Tuesday. Dry weather should
then return during the middle of next week.

Near term /until 6 am Friday morning/
Water vapor imagery shows a weak upper shortwave moving through
southern sc this afternoon. This feature aligns with a cluster
of showers and tstms that have been steadily moving nne through
the area. The best instability remains across the central
portion of the area where more sunshine reached the surface
today, thus the best chance of stronger convection will be in
this shrinking area. By early this evening the ongoing
convection is expected to diminish as we lose daytime heating.

After midnight the warm front will lift north, then the cold
front will approach from the west. Extensive upper shortwave
energy will move into the area from 06-12z, accompanied by weak
upper jet divergence and fairly deep moisture. This should yield
increasing shower and TSTM coverage with the warm front later
tonight, mainly across inland areas and southern sc. Model
convective fields are marginal with less than 800 j/kg CAPE and
lifted indices of -1 to -2c. 40-50 kt 0-6 km bulk shear
indicate the potential for some storm organization though the
weak instability should limit severe chances. We expect only a
gradual cooling of temps overnight due to increasing low-level
warm advection.

Short term /6 am Friday morning through Sunday/
A cold front will approach the region Friday and then push through
Friday night. Lift along with a shortwave moving through will
generate showers and thunderstorms Friday morning, especially
inland. Overall instability is meager, especially since it's before
peak heating, so the severe weather threat is low. Remnant showers
will quickly diminish Friday afternoon as the approaching cold front
pushes the moisture offshore. The daytime hours should be breezy
with gusts up to around 25-30 mph. Following frontal passage Friday
night, a broad area of high pressure will spread across the east
coast, bringing dry weather this weekend.

Temperatures should remain above normal Friday due to compressional
heating ahead of the front. Despite the slight cool down behind the
front this weekend, temperatures should remain above normal due to
downslope flow.

Long term /Sunday night through Thursday/
Dry high pressure to prevail through Sunday night although moisture
will be increasing Monday morning as low-level jetting ramps up
ahead of approaching low pressure from the west. Looks like a good
shot of showers and storms Monday and Monday night as low pressure
passes by to the northwest of the area. Could be another high
shear/low CAPE situation and a few severe storms might be possible.

Things should clear out by Tuesday but the ECMWF still indicates a
few showers possible, mainly across sc. High pressure will then move
in through Wednesday before another storm system likely moves across
the deep south and brings rain back to the area Wednesday night into
Thursday. Temperatures should remain above normal through the
period.

Aviation /20z Thursday through Tuesday/
Main concern is some MVFR ceilings late tonight as the warm
front lifts north and scattered to numerous showers/storms
develop ahead of the cold front. We included MVFR ceilings at
both terminals. Vsby restrictions will also be possible but the
precipitation coverage is uncertain at this time. Gusty SW winds
developing late morning through the afternoon behind the front.

Extended aviation outlook: restrictions likely Monday and
Monday night.

Marine
Increasing southeast winds tonight will bring higher seas to the
marine area, primarily the charleston nearshore waters and ga
offshore waters. We posted a small craft advisory for these two
waters beginning at 11 pm.

Friday through Tuesday: a cold front will move through Friday
night/early Saturday. Advisories due to winds and seas should be in
place for all coastal marine zones Friday morning, except for
zone amz354. The worst conditions are expected across amz374 and
the northeastern portion of amz350. These advisories are
expected to drop off Friday night as high pressure moves towards
the area, allowing winds and seas to trend downward. Conditions
will go downhill again Monday as a storm system approaches from
the west and advisories will be possible Monday into Tuesday,
at least for the offshore ga waters and sc waters.

Tides/coastal flooding
Given a 0.7-0.9 ft anomaly with the last two high tides, shallow
coastal flooding looks all but certain along the sc coast late
this evening. Therefore we issued a coastal flood advisory with
expected levels of 7.3-7.6 ft mllw. Chances are lower that the
ft pulaski gage will reach 9.2 ft mllw though it will definitely
be close. We will hold off on issuing an advisory there until
trends can be monitored further.

Chs watches/warnings/advisories
Ga... None.

Sc... Coastal flood advisory from 9 pm this evening to midnight edt
tonight for scz048>050.

Marine... Small craft advisory from 9 am Friday to midnight edt Friday
night for amz352.

Small craft advisory from 11 pm this evening to midnight edt
Friday night for amz350-374.

Near term... Jrl
short term... Ms
long term... Rjb
aviation... Jrl/ms
marine... Jrl/ms
tides/coastal flooding... Jrl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 9 mi49 min SSE 7 G 9.9 75°F 67°F1014.8 hPa
41033 40 mi71 min ESE 7.8 G 14 67°F 65°F1015.2 hPa
SAXG1 - Sapelo Island Reserve, GA 41 mi79 min SE 7 80°F 1014 hPa (-3.0)66°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 41 mi89 min ESE 7.8 G 9.7 69°F 67°F3 ft1014.8 hPa (-1.7)65°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, GA6 mi21 minSE 1010.00 miPartly Cloudy80°F67°F66%1013.5 hPa
Savannah, Savannah International Airport, GA14 mi26 minE 910.00 miMostly Cloudy80°F61°F52%1013.7 hPa

Wind History from SVN (wind in knots)
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Last 24hrE7SE7E3CalmCalmCalmE4E5CalmCalmE5E4E4E4E4E5--CalmSE6S6SE4S5E3SE10
1 day agoW8W8W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW3N7NE6E6E5E10E7SE3E5
2 days agoS4S5S3S4CalmCalmS3CalmCalmS5SW3CalmS3SW3CalmSW4SW7W9W8W8W9
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Tide / Current Tables for Isle of Hope, Skidaway River, Georgia
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Isle of Hope
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Thu -- 05:08 AM EDT     -1.14 feet Low Tide
Thu -- 07:14 AM EDT     Sunrise
Thu -- 09:13 AM EDT     Moonrise
Thu -- 11:28 AM EDT     8.68 feet High Tide
Thu -- 05:26 PM EDT     -1.21 feet Low Tide
Thu -- 07:42 PM EDT     Sunset
Thu -- 10:43 PM EDT     Moonset
Thu -- 11:47 PM EDT     9.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.97.24.82.2-0-1.1-0.61.23.65.97.78.68.57.45.42.90.5-1-10.63.15.77.99.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Thu -- 02:24 AM EDT     -2.69 knots Max Ebb
Thu -- 05:40 AM EDT     0.00 knots Slack
Thu -- 07:14 AM EDT     Sunrise
Thu -- 08:14 AM EDT     2.55 knots Max Flood
Thu -- 09:12 AM EDT     Moonrise
Thu -- 11:53 AM EDT     -0.00 knots Slack
Thu -- 02:54 PM EDT     -2.51 knots Max Ebb
Thu -- 05:55 PM EDT     0.00 knots Slack
Thu -- 07:42 PM EDT     Sunset
Thu -- 08:35 PM EDT     2.90 knots Max Flood
Thu -- 10:43 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-2.1-2.6-2.6-2.1-10.51.92.52.31.70.9-0.1-1.4-2.3-2.5-2.2-1.40.11.72.72.82.21.3

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 (16,3,4,5)
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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.