Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Thunderbolt, 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 7:21AMSunset 7:39PM Thursday March 23, 2017 12:25 PM EDT (16:25 UTC) Moonrise 3:24AMMoonset 2:19PM Illumination 16% Phase: Waning Crescent; Moon at 26 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- 1116 Am Edt Thu Mar 23 2017
.small craft advisory in effect through this evening...
Rest of today..NE winds 20 to 25 kt with gusts to 30 kt early...becoming e. Seas 5 to 7 ft...subsiding to 4 to 6 ft this afternoon.
Tonight..NE winds 15 to 20 kt...becoming E 10 to 15 kt after midnight. Seas 4 to 6 ft...subsiding to 4 to 5 ft after midnight.
Fri..E winds 10 kt. Seas 3 to 4 ft.
Fri night..SE winds 5 to 10 kt. Seas 3 to 4 ft.
Sat..SE winds 5 to 10 kt. Seas 3 to 4 ft.
Sat night..SE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers after midnight.
Sun..S winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.
Sun night..S winds 5 to 10 kt. Seas 3 to 4 ft.
Mon..S winds 5 to 10 kt. Seas 3 to 4 ft.
Mon night..S winds 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas can be higher in and near tstms.
AMZ300 1116 Am Edt Thu Mar 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build in from the north through tonight before shifting over the atlantic through the weekend. A cold front is expected to affect the area early next week.

7 Day Forecast for Marine Location Near Thunderbolt, GA
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location: 32.04, -81.04     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 231452
afdchs
area forecast discussion
national weather service charleston sc
1052 am edt Thu mar 23 2017

Synopsis
High pressure will build in from the north through tonight before
shifting over the atlantic through the weekend. A cold front is
expected to affect the area early next week.

Near term /through tonight/
Today: a wedge of high pressure will persist along the eastern
seaboard, resulting in dry conditions over the southeastern united
states. Expect the sfc wedge to dominate the pattern with a cooler
northeast wind despite mostly sunny skies and an expanding mid/upper
lvl ridge of high from the southwest. In general, high temps will
range in the low to mid 60s, warmest over southeast georgia.

Tonight: the surface high starts to shift east, allowing a stronger
onshore flow to develop and increase low-level moisture. Some
maritime stratus may move into coastal areas late tonight though
most areas will see no greater than partly cloudy skies.

Short term /Friday through Sunday/
Friday, the center of sfc high pressure is forecast to shift over
the western atlantic as low pressure deepens over the southern great
plains. This pattern will support steady SE winds across the
forecast area. Given partly sunny conditions and the passage of the
h5 ridge axis overhead, conditions should warm considerably from
Thursday. Using a blend of guidance, high temperatures are forecast
to range in the low to mid 70s.

Saturday, a low pressure system is expected to track from the
southern great plains to the mid west as high pressure remains over
the atlantic. Onshore winds from the SE through continue through the
period. High temperatures may warm two to four degrees warmer than
values reached on Friday.

Sunday, the base of a h5 trough is expected to rotate on the SE side
of a closed low centered over the mid west. The occluded sfc low
will slowly move north toward lake michigan through the day. The
region will remain within the warm sector, highs reaching into the
upper 70s to the low 80s with dewpoints in the upper 50s. Gfs
indicates that afternoon values of sbcapes are forecast to range
from 500 j/kg near the coast to over 1000 j/kg inland. I will
increase afternoon and evening pops to chc inland to schc over the
marine zones, mentioning both showers and thunderstorms.

Long term /Sunday night through Wednesday/
Conditions appear unsettled across the CWA Sunday night through late
Tuesday. Medium range guidance indicates that a axis of a longwave
trough will ripple across the southeast CONUS early next week. The
forecast area will remain within the warm sector, with weak to
moderate instability developing each afternoon and evening. The
environment appears the most supportive for deep convection late
Tuesday with the passage of the mid level trough and sfc boundary.

Temperatures early next week should start the day around 60 degrees
and peak around 80 by mid afternoon. Thursday and Friday, the
leading edge of a canadian air mass is expected to spread across the
cwa. Conditions should feature dry wx with slightly above normal
temperatures.

Aviation /15z Thursday through Monday/
Vfr conditions are expected at both chs and sav terminals through
tonight. Gusty winds today.

Extended aviation outlook: showers and thunderstorms could develop
each afternoon and evening Sunday through Tuesday. Patchy early
morning fog is possible over wet soil.

Marine
Today and tonight: a strong northeast gradient will persist through
early afternoon with a wedge of high pressure building south over
the coastal waters. Conditions continue to support small craft
advisories for all waters outside the chs harbor, with northeast
winds peaking around 25 kt and seas as high as 5-7 ft in nearshore
waters and 7-9 ft in offshore georgia waters. Winds will slowly
decrease this afternoon through tonight though seas will be slower
to subside. The trend suggests conditions will fall below small
craft advisory levels in nearshore waters by midnight while
higher winds/seas remain for a small craft advisory in offshore
georgia waters.

Friday through Tuesday: the center of high pressure will
gradually shift over the western atlantic Friday and Friday
night, allowing seas to decrease to around 5 feet for most areas
by sunset Friday. Scas are scheduled to expire Thursday night,
expect amz374 remaining through most of Friday. Steady south to
southwest winds are forecast to remain over the zones through
the weekend into early next week. Seas could increase to six
feet across eastern amz374 during the weekend. Scattered showers
and thunderstorms are forecast to develop Sunday through
Tuesday, especially during the daylight hours.

Rip currents: a strong northeast wind and a 7-8 second northeast
swell today will produce a moderate risk for rip currents along
all beaches.

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

Sc... None.

Marine... Small craft advisory until midnight edt tonight for amz350-352-
354.

Small craft advisory until 6 pm edt Friday for amz374.

Near term... Dpb
short term... Ned
long term... Ned
aviation... Dpb/ned
marine... Dpb/ned


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi37 min ENE 25 G 31 58°F 60°F1031.8 hPa
41033 37 mi77 min ENE 21 G 31 58°F 60°F1032.1 hPa
SAXG1 - Sapelo Island Reserve, GA 45 mi85 min ENE 15 63°F 1030 hPa (+4.0)52°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 45 mi35 min ENE 21 G 27 62°F 62°F8 ft1029.2 hPa (+2.9)50°F
ACXS1 - ACE Basin Reserve, SC 47 mi100 min NNE 5.1 59°F 1032 hPa43°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 mi27 minE 1010.00 miPartly Cloudy64°F47°F55%1031.1 hPa
Savannah, Savannah International Airport, GA11 mi32 minE 18 G 2510.00 miOvercast and Breezy64°F43°F46%1031.5 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi95 minNE 12 G 2310.00 miClear59°F44°F59%1031.8 hPa

Wind History from SVN (wind in knots)
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Last 24hrN8
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E10E10E7NE7E7NE6E8NE10E7
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1 day agoW6W14
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W13W10SW6SW6S5SW6SW6NW15
G34
W5SW6W4S6SW5W4NW4W6NW9NW9N8
2 days agoSE4W6CalmS9SE12S9S8S5S6S6S6S3SW3S3S6S3S4CalmSW4SW6SW5SW9W8W8

Tide / Current Tables for Thunderbolt, Wilmington River, Georgia
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Thunderbolt
Click for Map
Thu -- 04:23 AM EDT     Moonrise
Thu -- 05:34 AM EDT     7.46 feet High Tide
Thu -- 07:23 AM EDT     Sunrise
Thu -- 11:42 AM EDT     0.91 feet Low Tide
Thu -- 03:19 PM EDT     Moonset
Thu -- 05:52 PM EDT     7.21 feet High Tide
Thu -- 07:38 PM EDT     Sunset
Thu -- 11:53 PM EDT     0.75 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.62.74.15.56.77.47.46.75.43.92.31.20.91.634.666.97.26.75.43.92.41.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Thu -- 02:25 AM EDT     1.82 knots Max Flood
Thu -- 04:23 AM EDT     Moonrise
Thu -- 06:12 AM EDT     -0.00 knots Slack
Thu -- 07:23 AM EDT     Sunrise
Thu -- 09:34 AM EDT     -1.72 knots Max Ebb
Thu -- 12:31 PM EDT     0.00 knots Slack
Thu -- 02:57 PM EDT     1.80 knots Max Flood
Thu -- 03:18 PM EDT     Moonset
Thu -- 06:25 PM EDT     -0.00 knots Slack
Thu -- 07:37 PM EDT     Sunset
Thu -- 09:02 PM EDT     -1.63 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.31.21.81.71.40.90.2-0.8-1.5-1.7-1.7-1.4-0.60.61.51.81.510.4-0.6-1.4-1.6-1.5-1.3

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 (12,3,4,5)
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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.