Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Henderson, GA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:45AMSunset 8:00PM Sunday April 22, 2018 2:59 AM EDT (06:59 UTC) Moonrise 11:39AMMoonset 12:55AM Illumination 44% Phase: First Quarter Moon; Moon at 7 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
    EDIT      (on/off)   Help
AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 1243 Am Edt Sun Apr 22 2018
Rest of tonight..E winds 10 to 15 kt. Seas 3 to 5 ft.
Sun..E winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 4 to 5 ft. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Sun night..E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, building to 5 to 7 ft after midnight. Showers.
Mon..SE winds 20 to 25 kt with gusts to 30 kt. Seas 5 to 7 ft, building to 6 to 8 ft in the afternoon. Showers with a slight chance of tstms.
Mon night..SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Seas 5 to 7 ft. Showers with a slight chance of tstms in the evening, then showers likely after midnight.
Tue..S winds 10 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the afternoon. Showers likely, mainly in the morning.
Tue night..S winds 5 to 10 kt, becoming W after midnight. Seas 4 to 5 ft. A slight chance of showers.
Wed..W winds 10 kt. Seas 3 to 4 ft.
Wed night..W winds 10 kt. Seas 3 to 4 ft.
Thu..W winds 10 kt. Seas 2 to 3 ft.
Thu night..W winds 5 to 10 kt. Seas 2 to 3 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1243 Am Edt Sun Apr 22 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cool and dry high pressure will prevail into Sunday. A low pressure system will approach the area Sunday night and will then slowly move up the coast through the middle of next week. Weak high pressure will return late next week.

7 Day Forecast for Marine Location Near Henderson, GA
   Hourly   EDIT   Help
location: 32.03, -81.22     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 220528
afdchs
area forecast discussion
national weather service charleston sc
128 am edt Sun apr 22 2018

Synopsis
Cool and dry high pressure will prevail into Sunday. A low
pressure system will approach the area Sunday night and will
then slowly move up the coast through the middle of next week.

Weak high pressure will return late next week.

Near term until 6 am this morning
As per satellite trends we have reduced cloud cover in many
areas, but also raised coverage along the counties bordering the
savannah river. We also lowered min temps 1-2f across parts of
the charleston quad-country area, but raised them 1-2f in many
other places. Isentropic ascent will allow for cloud cover to
gradually increase overnight, but the risk for measurable
rainfall is less than 15%, with latest radars in and near the
area not yet showing any returns.

Previous discussion...

latest satellite still showing broken to overcast skies across
the southern half of the area. Expect mostly cloudy skies to
continue much of the night, spreading into the northern area
late. Thicker cloud cover over the south is slowing the
temperature fall this evening. Overall, still expect coolest
temperatures over the northern 1 3 of the area in the lower 50s,
and mid to upper 50s south. Still feel confident that
precipitation will hold off through the night, despite a gradual
increase in deep layer moisture clouds, especially later
tonight from south to north. Have continued to cap pops below
15% through 8 am Sunday.

Short term 6 am this morning through Tuesday
Sunday: expect a transition day as the shortwave ridge aloft breaks
down and shifts eastward with the arrival of a deep upper low into
the lower mississippi valley. High pressure will continue to extend
into the region, though moisture will steadily deepen through the
day with increasing clouds. There could even bee isolated to
scattered showers through the day within the onshore flow if there
is enough low level convergence. We continue to advertise rain
chances in the 20-30 percent range. Highs are expected to be around
70 across the area, upper 60s at the beaches. Also, expect another
breezy afternoon closer to the coast with gusts into the 20-25 mph
range possible.

Sunday night and Monday: overall, not much change to the forecast
thinking during this time period. Deep moisture will stream into the
region with precipitable water values expected to surge past 1.5
inches, which would be at or above climatological maxes. Deep
forcing will spread across the region as the 300 mb jet noses in
from the west, coincident with low level convergence and isentropic
ascent. Coverage and intensity of precipitation should ramp up late
Sunday night and continue through much of Monday. Rain chances
steadily increase and reach 100 percent everywhere by Monday
morning. There remains a chance of thunder, mainly with elevated
instability, and it has been maintained in the forecast.

The ingredients for a widespread heavy rainfall event are certainly
in place, but there is just enough model inconsistency to create
some forecast uncertainty. Models are showing run to run differences
with where the heaviest rainfall occurs, based on how convection
over the coastal waters spreads onshore in the southeasterly flow.

The forecast continues to feature widespread 2-3 inch amounts, with
a bullseye of 3-4 inches along the south carolina coast. However,
depending on exactly where the most active feeds of convection set
up, there could be tighter amount gradients and shifts in where the
highest lowest amounts occur. The concern for flooding remains on
the low end due to the fact that much of the area is in a severe
drought (national drought monitor) with significant rainfall
deficits for 2018. Since the start of the year, almost the entire
forecast area is 4-6 inches below normal with some areas more than 6
inches below normal. Specifically (through 4 20), kchs is 4.44 below
normal and ksav is 7.12 below normal. So, a widespread rain would be
very welcome and we likely have enough capacity to take on a lot of
water with minimal flooding concerns.

Monday night through Tuesday: the bulk of precipitation will come to
an end from southeast to northeast Monday night as the moisture feed
shifts downstream of the forecast area. We could still see some
showers on Tuesday as the trough sits across the area and 500 mb
temperatures fall within the trough. Model response only seems to
warrant 20-30 percent chances at this time. We could even see enough
sun to allow for temperatures to rise into the mid to upper 70s on
Tuesday.

Long term Tuesday night through Saturday
Mid level troughing will persist over the eastern u.S. Through late
week. At the surface, an area of low pressure will slowly lift
northeast up the coast Wednesday into Thursday. There are some
discrepancies in the models thereafter, but it appears that a cold
front could be approaching the forecast area closer to the weekend.

Rain chances will remain fairly low through the period with no more
than 20% in the forecast at this time. Temperatures will be near
normal.

Aviation 06z Sunday through Thursday
Kchs: while there could be some showers impacting the terminal
late in the 06z TAF cycle, for now we have maintainedVFR
conditions with only vcsh between 00z and 06z Monday in advance
of a warm front in georgia. Gusty e-se winds will average 15-25
kt late Sunday morning into the evening.

Ksav:VFR weather will prevail through Sunday morning, before
the risk of showers and eventually lower ceilings and possible
lower visibilities arrive in showers associated with the warm
front mentioned above. Since it's still late in the TAF cycle,
we haven't gone any lower than 6sm -shra and low-endVFR
ceilings tonight, but MVFR conditions are possible.

Extended aviation outlook: flight restrictions in reduced
ceilings and visibilities are expected Sunday night into at least
Monday night. Gusty winds expected on Monday.

Marine
Rest of tonight: easterly winds will average around 15 kt within
20 nm of the coast, but up to 15-20 kt further offshore under
the influence of strong high pressure centered near the
delmarva. Seas remain elevated due to the favorable
trajectories, and as high as 3-5 ft within 20 nm, up to 6 ft on
the outer georgia waters.

Sunday through Thursday: high pressure will remain in place on
Sunday with enough enhanced gradient to produce elevated east to
east-northeast winds. Speeds should generally top out in the
15-20 knot range, but could be marginally supportive of small
craft advisories. Winds will then increase through Sunday night
as a surface low to the west develops, and small craft advisory
conditions become more certain. Once advisories are up beginning
Sunday night, they will likely be in place for most, if not all
of the waters, through Monday night Tuesday. The main period of
interest will come on Monday when a surge of southeasterly flow
is anticipated which could bring a period of gales. The best
setup will be across the charleston county waters and the outer
georgia waters, and this will be added to the hazardous weather
outlook. The gradient will begin to relax Monday night, and the
surface low will move to the northeast on Tuesday. Conditions
will improve but elevated seas could linger a bit longer. The
local waters will then be headline free through the rest of the
period.

Rip currents: Sunday conditions looks breezy, with onshore flow
of 15-20 knots, with gusts to around 25 knots at times. This
elevated onshore flow, combined with a modest swell, will
result in a moderate risk of rip currents at all beaches.

The chance for an elevated risk of rip currents will then continue
into the early week time period due to strong onshore winds and
larger surf.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 2 pm edt Wednesday for amz374.

Near term...

short term...

long term... Ect
aviation...

marine...



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi42 min E 12 G 15
SAXG1 - Sapelo Island Reserve, GA 42 mi60 min NE 1.9 63°F 1024 hPa (-1.0)63°F
41033 46 mi52 min ENE 9.7 G 16 64°F 63°F1024.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi70 min ESE 14 G 16 67°F 65°F4 ft1023.7 hPa (-1.1)60°F

Wind History for Fort Pulaski, GA
(wind in knots)    EDIT      (on/off)   Help
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last
24hr
E18
E17
G22
E15
G20
E15
G21
E18
G22
E19
E17
E18
G24
NE16
G20
E17
G22
E15
G20
NE15
G24
NE19
G24
NE16
G21
E17
G21
NE17
G22
E14
G18
E16
G20
NE12
G17
E17
E13
G17
E13
G18
E17
E13
G17
1 day
ago
NE15
G19
NE17
G21
NE16
G20
NE13
G18
NE13
G18
NE17
G21
NE18
G24
NE13
G18
NE13
G18
NE14
G20
E15
G19
NE14
G20
E15
G19
E13
G18
E12
G16
E13
G16
E11
G14
E11
E12
E14
E11
E10
G14
E12
G18
E15
G20
2 days
ago
W6
G9
W7
W7
G11
W7
G10
W11
G16
W6
G12
SW7
G11
W13
G19
W14
G18
W15
W18
G22
W15
G22
W18
G23
W16
G20
W13
G16
W6
NW17
G25
NW8
N12
G16
N9
G12
N8
NE13
G19

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA4 mi64 minENE 810.00 miMostly Cloudy64°F57°F80%1024.3 hPa
Savannah-Hilton Head International Airport, GA8 mi67 minENE 610.00 miMostly Cloudy62°F55°F80%1025 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi64 minNE 410.00 miFair56°F53°F91%1024.3 hPa

Wind History from SVN (wind in knots)
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last 24hrCalmCalmNE7NE6NE4N5NE7NE10NE10
G19
E12
G19
NE10E14
G20
E15
G23
E17E16
G21
E15NE9NE8NE6E7NE6E8E10E8
1 day agoNE9
G19
NE12
G18
NE8NE9NE12
G17
NE14
G19
NE11
G17
NE11E12
G17
NE9
G17
E10
G15
E11
G18
E10
G16
NE7
G19
NE4E8E9E9E6NE4NE5NE4NE5NE4
2 days agoSW10SW11W12SW8SW9SW9SW11W13
G17
W13--W18W18
G24
W22
G26
W18
G29
W19
G24
W14W11W6NW12
G16
N8N11N10N9N9

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Highway bridge
Click for Map
Sun -- 01:55 AM EDT     Moonset
Sun -- 05:05 AM EDT     1.14 feet High Tide
Sun -- 06:48 AM EDT     Sunrise
Sun -- 12:39 PM EDT     Moonrise
Sun -- 12:44 PM EDT     0.05 feet Low Tide
Sun -- 05:45 PM EDT     0.99 feet High Tide
Sun -- 05:46 PM EDT     First Quarter
Sun -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.10.40.811.11.110.80.60.40.20.10.10.20.50.80.910.90.80.60.40.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
   EDIT      (on/off)   Help   One Week of Data
Savannah River Entrance
Click for Map
Sun -- 01:53 AM EDT     Moonset
Sun -- 03:15 AM EDT     -0.00 knots Slack
Sun -- 06:21 AM EDT     -2.06 knots Max Ebb
Sun -- 06:46 AM EDT     Sunrise
Sun -- 09:32 AM EDT     0.00 knots Slack
Sun -- 12:00 PM EDT     1.66 knots Max Flood
Sun -- 12:37 PM EDT     Moonrise
Sun -- 03:45 PM EDT     -0.00 knots Slack
Sun -- 05:46 PM EDT     First Quarter
Sun -- 06:54 PM EDT     -1.83 knots Max Ebb
Sun -- 07:57 PM EDT     Sunset
Sun -- 09:44 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.71.20.3-0.9-1.7-2-2-1.6-0.60.51.41.71.51.20.7-0.3-1.2-1.7-1.8-1.6-0.90.31.5

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of Southeast    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (2,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Charleston, SC
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.