Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
Midway, 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 7:24AMSunset 7:41PM Wednesday March 22, 2017 8:26 PM EDT (00:26 UTC) Moonrise 2:38AMMoonset 1:25PM Illumination 22% Phase: Waning Crescent; Moon at 25 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- 657 Pm Edt Wed Mar 22 2017
.small craft advisory in effect through Thursday evening...
Tonight..E winds 15 to 20 kt...becoming ne 20 to 25 kt after midnight. Seas 3 to 4 ft...building to 4 to 6 ft after midnight.
Thu..NE winds 20 to 25 kt with gusts to 30 kt. Seas 5 to 7 ft... Subsiding to 4 to 6 ft in the afternoon.
Thu night..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.
Sun..S winds 5 to 10 kt. Seas 3 to 4 ft.
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.
AMZ300 657 Pm Edt Wed Mar 22 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build in from the north through Thursday night before shifting into the atlantic on Friday and persisting through the weekend. A cold front could affect the area early next week.

7 Day Forecast for Marine Location Near Midway, GA
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location: 31.73, -81.21     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 222336
afdchs
area forecast discussion
national weather service charleston sc
736 pm edt Wed mar 22 2017

Synopsis
High pressure will build in from the north through Thursday night
before shifting into the atlantic on Friday and persisting through
the weekend. A cold front could affect the area early next week.

Near term /until 6 am Thursday morning/
An omega block is developing aloft across the nation, featuring
ridging in the central states, anchored on both sides by large
scale troughing. We're situated in the region of a northwest
flow between an atlantic trough and ridging just to the west. At
the surface, a huge 1036 mb high over the great lakes shift
southeast and settle into the alleghenies late tonight, with an
associated wedge to punch it's way south and southwest through
the carolina's and into georgia. The resulting subsidence
within this pattern and pwat's that are below normal will
support a rainfree night everywhere within the cwfa. Although
there will be varying amounts of mid and high level clouds
throughout, these will fade with time overnight, perhaps
replaced by some marine-induced stratocumulus over coastal
georgia after midnight. There is enough CAA to support lows some
10-15f cooler than this morning, with maybe a few places in
northern berkeley county sneaking into the upper 30s, while
mcintosh county will be the warmest with lows in the mid 50s due
to more cloud cover and some onshore fetch.

Short term /6 am Thursday morning through Saturday/
Thursday and Friday: a wedge of high pressure will be fully
entrenched over the region Thursday, bringing dry and cooler
conditions within a persistent northeast flow. In general, afternoon
highs will peak in the low/mid 60s. Thursday night lows will range
in the mid/upper 40s away from the coast. A high amplitude ridge of
high pressure aloft will then extend across the southeast on Friday
while the wedge begins to weaken at the sfc. The pattern will lead
to noticeably warmer conditions than the previous day. In general,
highs will range in the low/mid 70s Friday afternoon. Dry conditions
will persist into Friday night with low temps ranging between the
low/mid 50s.

Saturday: the area will be positioned between a mid/upper lvl ridge
of high pressure extending across the southeast coast and a deep low
pressure system advancing over the central united states. The
pattern will result in a strong return flow from the atlantic well
ahead of the low pressure system to the west. The combination of
increasing lvls of moisture and isentropic lift will help produce
clouds over the area, but showers should hold off over the region
until at least Saturday night. Temps will be warmer than the
previous day, ranging in the mid/upper 70s over most areas away from
the immediate coast.

Long term /Saturday night through Wednesday/
A mid level short wave and the associated sfc low are forecast to
ripple across the region early next week. Forecast sounding indicate
that diurnal weak CAPE will likely develop each afternoon Sunday
through Tuesday. A sfc cold front should sweep across the region
late Tuesday. The leading edge of a canadian air mass should spread
across the CWA on Wednesday. Temperatures appear above normals,
generally in the upper 70s to low 80s. I will mention at least schc
pops for shra/tsra each afternoon and evening Sunday through
Tuesday.

Aviation /00z Thursday through Monday/
Vfr, with ne-e winds averaging 10-20 kt through sunset Thursday
evening.

Extended aviation outlook:VFR conditions will prevail through
Friday. Brief flight restrictions possible Saturday into Sunday
with low clouds and showers/thunderstorms.

Marine
Tonight: an expansive anticyclone covering most of the country
east of the mississippi and extending into the western atlantic,
will dominate the synoptic pattern. Constant pressure rises
averaging around 1 mb every hour and a tightening of the
clockwise gradient, will produce fresh to strong ne-e breezes
over the ocean, and a solid 15-20 kt in charleston harbor.

Soundings suggest a chance for gale force force gusts during the
late evening and overnight, but with geostrophic winds of 35-40
kt, this suggests that any risk would be marginal, thus no gale
warning is necessary. Charleston harbor still might require an
advisory and we continue to carefully monitor trends. The
favorable onshore fetch will allow for building seas, reaching
as high as 6 or 7 ft within 20 nm, 8 o 9 ft further offshore,
while waves in charleston harbor will be at least 1-2 ft.

Strong cold air advection associated with high pressure will produce
strong northeast flow over all coastal waters Wednesday into
Thursday. Small craft advisories will therefore remain in effect for
all waters outside the chs harbor through much of Thursday until the
pressure gradient weakens as sfc high pressure shifts offshore. In
general, winds should peak between 25-30 kt early Thursday while
seas peak between 5-7 ft nearshore and 7-9 ft in offshore georgia
waters. Conditions will likely improve to below small craft advisory
levels for nearshore waters Thursday night, while higher seas linger
in offshore georgia waters into Friday. Steady south to southwest
winds are forecast to remain over the zones through the weekend.

Rip currents: a strong northeast wind and a 6-7 second northeast
swell will develop/occur as high pressure builds over the waters
into Thursday. A moderate risk of rip currents is therefore in
effect for all beaches along the southeast south carolina and
southeast georgia coast Thursday.

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

Sc... None.

Marine... Small craft advisory until midnight edt Thursday night for
amz352-354.

Small craft advisory until 6 pm edt Friday for amz374.

Small craft advisory until 6 pm edt Thursday for amz350.

Near term...

short term...

long term... Ned
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAXG1 - Sapelo Island Reserve, GA 22 mi86 min E 9.9 65°F 1020 hPa (+2.0)56°F
FPKG1 - 8670870 - Fort Pulaski, GA 27 mi38 min E 14 G 17 62°F 61°F1021.5 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 29 mi36 min E 18 G 19 64°F 62°F3 ft1019.9 hPa (+2.1)58°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, GA21 mi28 minE 10 G 1810.00 miMostly Cloudy63°F56°F80%1020.7 hPa
Ft. Stewart, GA22 mi28 minE 810.00 miPartly Cloudy65°F50°F61%1020.3 hPa

Wind History from SVN (wind in knots)
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Last 24hrSW6S5SW6SW6NW15
G34
W5SW6W4S6SW5W4NW4W6NW9NW9N8N8
G16
NE9NE10E11E12E13E11
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1 day agoS6S6S6S3SW3S3S6S3S4CalmSW4SW6SW5SW9W8W8W6W14
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2 days agoSE3CalmW4CalmCalmW3CalmCalmCalmW4W3NW3NW3NW3S5S6SE4W6CalmS9SE12S9S8S5

Tide / Current Tables for North Newport River (Daymark 119), Georgia
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North Newport River (Daymark 119)
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Wed -- 03:37 AM EDT     Moonrise
Wed -- 04:39 AM EDT     6.61 feet High Tide
Wed -- 07:25 AM EDT     Sunrise
Wed -- 11:05 AM EDT     1.12 feet Low Tide
Wed -- 02:25 PM EDT     Moonset
Wed -- 05:00 PM EDT     6.28 feet High Tide
Wed -- 07:37 PM EDT     Sunset
Wed -- 11:12 PM EDT     1.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.33.54.85.86.56.66.15.13.82.61.61.11.42.43.755.96.35.953.82.51.51

Tide / Current Tables for Florida Passage, Bear River, Georgia
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Florida Passage
Click for Map
Wed -- 03:38 AM EDT     Moonrise
Wed -- 04:50 AM EDT     6.86 feet High Tide
Wed -- 07:25 AM EDT     Sunrise
Wed -- 11:23 AM EDT     1.07 feet Low Tide
Wed -- 02:24 PM EDT     Moonset
Wed -- 05:11 PM EDT     6.51 feet High Tide
Wed -- 07:37 PM EDT     Sunset
Wed -- 11:30 PM EDT     0.97 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
23.24.65.86.66.96.45.54.22.91.81.11.22.13.54.966.56.35.44.22.91.81.1

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.