Thursday, July16, 2020
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Marine Weather and Tides
Montgomery, GA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:28AMSunset 8:31PM Thursday July 16, 2020 10:09 AM EDT (14:09 UTC) Moonrise 1:58AMMoonset 4:02PM Illumination 15% 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- 726 Am Edt Thu Jul 16 2020
Today..E winds 5 to 10 kt. Seas 2 ft.
Tonight..E winds 5 to 10 kt. Seas 2 ft.
Fri..E winds 5 to 10 kt. Seas 2 ft.
Fri night..SE winds 5 to 10 kt. Seas 2 ft.
Sat..SE winds 5 to 10 kt. Seas 2 ft.
Sat night..S winds 5 to 10 kt. Seas 2 ft.
Sun..S winds 5 to 10 kt. Seas 2 ft.
Sun night..S winds 10 kt. Seas 2 ft.
Mon..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Mon night..S winds 10 to 15 kt. Seas 2 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 726 Am Edt Thu Jul 16 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure should prevail into the middle of next week.


7 Day Forecast for Marine Location Near Montgomery, GA
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location: 31.84, -81.15     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 161405 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1005 AM EDT Thu Jul 16 2020

SYNOPSIS. Atlantic high pressure should prevail into the middle of next week.

NEAR TERM /THROUGH TONIGHT/. Mid level ridging will persist over the Carolinas today. At the surface, high pressure will be the dominant feature. Subsidence and mid level dry air noted in the 12z KCHS RAOB will act to limit convection. We maintained slight chance (20%) through the afternoon to account for isolated showers/thunderstorms that could develop along and inland of the sea breeze. No severe weather is anticipated, but with beefy DCAPE values, could see some gusty winds within any storms that do develop. Otherwise, high temperatures are forecast to be in the low to mid 90s inland of the beaches. Ongoing forecast was in good shape, so only minor changes were needed with the late morning update.

Tonight: The sfc ridge will increase over the land zones during the night. At H5, the ridge centered over TN will continue to remain over the forecast area. Based on the thermal profiles, the atmosphere should feature llvl CIN. I will keep PoPs in the single digits overnight. Using a blend of MOS, low temperatures are forecast to range from the low 70s inland to the upper 70s along the coast.

SHORT TERM /FRIDAY THROUGH SUNDAY/. A fairly typical summertime pattern will be in place this weekend and to start off next week as the area remains positioned between sfc high pressure extending across the western Atlantic and a lee trough developing inland. A few showers and/or thunderstorms will be possible Friday afternoon and Saturday afternoon, mainly associated with an inland moving seabreeze circulation. Any convection during the day will quickly dissipate during evening hours with diurnal heat loss. By Sunday, few to scattered showers and thunderstorms will be possible during the afternoon, with greatest precip coverage occurring across inland areas near the vicinity of a pronounced lee trough. Again, most convection will likely dissipate quickly during the evening due to diurnal heat loss.

Temps will remain warm each day under ridging aloft and sufficient sfc heating in place. In general, highs will range in the low/mid 90s each day. A few locations could even peak in the upper 90s well inland across Southeast Georgia Saturday and Sunday. Overnight lows will be mild, ranging in the low/mid 70s inland to upper 70s/around 80 near the coast.

LONG TERM /SUNDAY NIGHT THROUGH WEDNESDAY/. A mid/upper level ridge of high pressure will persist across the Southeast through early next week with the bulk of shortwave energy passing north of the area within a broad zonal flow. However, subtle h5 shortwave activity should begin to drift across the Southeast by the middle of next week as a broad mid-upper lvl trough of low pressure takes shape across the Central United States. Ahead of the trough, temps will be warm, peaking in the low/mid 90s each day (warmest across inland areas of Southeast Georgia), but scattered showers and thunderstorms could limit overall high temps during afternoon hours, especially during the middle of next week when shortwave energy associated with the trough is expected to help produce greater precip coverage between the western edge of high pressure across the Atlantic and a more pronounced lee trough just inland. Overnight lows should remain mild, ranging in the mid/upper 70s away from the immediate coast.

AVIATION /14Z THURSDAY THROUGH MONDAY/. VFR is expected to prevail through 12z Friday. The chance for a direct impact from afternoon showers/thunderstorms is too low to include mention in the TAF at this time.

Extended Aviation Outlook: VFR conditions will likely prevail at both terminals through the weekend, but brief flight restrictions are possible during afternoon/evening showers and/or thunderstorms Sunday and Monday.

MARINE. Today and Tonight: High pressure will remain over the waters through tonight with conditions expected to be well below Small Craft Advisory thresholds. In general, east winds will peak around 10 kts. Seas will range between 1 to 3 ft.

Friday through Tuesday: Atlantic high pressure will prevail across the coastal waters this weekend and into early next week. Given a weak pressure gradient pattern in place, winds/seas are expected to remain below Small Craft Advisory levels. In general, east-southeast winds should peak no higher than 10-15 kt during the weekend, then gradually become south early next week, peaking no higher than 15-20 kt. Seas will be no higher than 2-3 ft.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.

NEAR TERM . ETM SHORT TERM . DPB LONG TERM . DPB AVIATION . DPB/ETM MARINE . NED


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 19 mi99 min E 5.1 G 7 84°F
SAXG1 - Sapelo Island Reserve, GA 30 mi69 min E 5.1 84°F 1021 hPa (+2.0)77°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 34 mi79 min E 9.7 G 14 84°F 85°F2 ft1020.2 hPa (+1.8)75°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, GA13 mi73 minE 510.00 miFair85°F76°F77%1020.2 hPa
Savannah-Hilton Head International Airport, GA21 mi76 minENE 510.00 miA Few Clouds85°F78°F80%1020.9 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA22 mi73 minNE 410.00 miA Few Clouds81°F81°F100%1020.6 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrCalmE8S3E8E6E8S8
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S8SE9SE8SE6SE7S6SE4SE3CalmCalmCalmCalmN4CalmW5N5E5
1 day agoNW7NW8W7W6CalmNW8W9
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2 days agoW7SW5SW9S10S11
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W7W10W9W4W3CalmCalmCalmCalmW6W4W5CalmCalmW3W6NW6

Tide / Current Tables for Florida Passage, Ogeechee River, Georgia
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Florida Passage
Click for Map
Thu -- 12:07 AM EDT     1.18 feet Low Tide
Thu -- 02:57 AM EDT     Moonrise
Thu -- 05:48 AM EDT     6.18 feet High Tide
Thu -- 06:30 AM EDT     Sunrise
Thu -- 12:13 PM EDT     0.47 feet Low Tide
Thu -- 05:01 PM EDT     Moonset
Thu -- 06:15 PM EDT     7.45 feet High Tide
Thu -- 08:30 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.52.53.855.96.25.74.73.52.21.10.50.823.75.46.87.47.26.45.23.82.4

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Thu -- 12:24 AM EDT     0.00 knots Slack
Thu -- 02:49 AM EDT     1.48 knots Max Flood
Thu -- 02:55 AM EDT     Moonrise
Thu -- 06:20 AM EDT     -0.00 knots Slack
Thu -- 06:28 AM EDT     Sunrise
Thu -- 09:08 AM EDT     -1.45 knots Max Ebb
Thu -- 12:24 PM EDT     0.00 knots Slack
Thu -- 03:07 PM EDT     2.05 knots Max Flood
Thu -- 05:01 PM EDT     Moonset
Thu -- 06:46 PM EDT     -0.00 knots Slack
Thu -- 08:29 PM EDT     Sunset
Thu -- 09:49 PM EDT     -1.71 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.40.61.31.51.20.80.3-0.6-1.2-1.5-1.4-1.1-0.40.71.621.81.30.7-0.2-1.1-1.6-1.7-1.6

Weather Map
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wmap_A
GEOS Local Image of    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (10,2,3,4)
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Ground Weather Radar Station Charleston, SC
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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 numerous 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.