Tuesday, January26, 2021
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Marine Weather and Tides
Montgomery, GA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:19AMSunset 5:53PM Tuesday January 26, 2021 4:55 PM EST (21:55 UTC) Moonrise 3:53PMMoonset 5:44AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 315 Pm Est Tue Jan 26 2021
Tonight..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers.
Wed..S winds 10 to 15 kt. Seas 2 ft. Showers likely. A slight chance of tstms in the afternoon.
Wed night..W winds 15 to 20 kt, becoming nw 20 to 25 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. A chance of showers.
Thu..NW winds 20 to 25 kt, becoming N 15 to 20 kt in the afternoon. Seas 3 to 4 ft.
Thu night..N winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..NE winds 5 to 10 kt. Seas 2 to 3 ft.
Fri night..S winds 5 kt, becoming W after midnight. Seas 2 ft.
Sat..E winds 5 to 10 kt. Seas 2 ft.
Sat night..SE winds 10 kt. Seas 2 to 3 ft.
Sun..S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
Sun night..SW winds 15 kt. Seas 3 to 4 ft. A chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 315 Pm Est Tue Jan 26 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A storm system will move through the area Wednesday night. High pressure will return late week, followed by another cold front early 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 262118 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 418 PM EST Tue Jan 26 2021

SYNOPSIS. A storm system will move through the area Wednesday night. High pressure will return late week, followed by another cold front early next week.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. This Evening and Tonight: A southwest flow will continue to advect warm and moist air across the Southeast United States, helping spawn additional clusters of showers and thunderstorms across the area into evening hours. Latest radar trends indicate the first round of showers and thunderstorms shifting off the Charleston County coast within the next hour, while additional activity ramps up across parts of Southeast Georgia well inland. At this time, 0-6 km bulk shear around 50 kt is expected this evening, but instability will remain marginal (500-1000 J/kg), especially once nightfall occurs. However, these conditions will continue to pose a limited risk of a stronger thunderstorm, now mainly focused across Southeast Georgia for the remainder of the evening and early tonight.

After midnight, the bulk of precip should transition more into rain and/or showers that develop north of a stalling front across the area. Expect precip coverage to become widespread across inland and northern zones late tonight and heading into daybreak as a wave of low pressure tracks east-northeast along/near the stalled boundary, providing abundant forcing and moisture convergence across the region while strong isentropic lift sets up across northern and inland zones. Temps will stay mild overnight despite precip, only dipping into the upper 50s north to lower 60s south.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/. A cold front draped across the area Wednesday morning is expected to sag to the south during the day. Meanwhile a potent upper shortwave will traverse the area during the day. Given the relatively moist atmosphere for late January, along with an increase in right entrance region upper jet divergence, a fairly widespread swath of showers and isolated thunderstorms will move through Wednesday. Most of the area should be in the cold sector during the day, except far southern zones closer to the Altamaha River. Little to no surface-based instability is expected so severe weather is not anticipated.

The brunt of the precipitation is expected to taper off from the west late Wednesday afternoon as the shortwave moves offshore and the stalled front pushes east. Clouds and a few showers could linger through Wednesday night across northern zones due to wrap around moisture associated with a developing surface low over eastern NC.

Cool, dry weather expected Thursday through Friday with highs in the 50s and lows in the 30s.

Lake Winds: Strong cold air advection behind a departing cold front will promote good mixing profiles over Lake Moultrie Wednesday night into Thursday. Wind gusts in excess of 25 knots are possible, and a Lake Wind Advisory will likely be needed.

LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/. High pressure will prevail on Saturday, allowing quiet and dry weather to continue. An amplifying mid level trough and associated surface low will then move into the region early next week. While there are still timing discrepancies between models, a cold front will eventually pass through, bringing the next chance of rain to the area. Temperatures will be near to above normal through the period.

AVIATION /21Z TUESDAY THROUGH SUNDAY/. Conditions should then remain VFR at both terminals outside showers. MVFR/IFR cigs and vsbys are then likely at both terminals starting around 04Z as showers and thunderstorms impact the terminals in advance of a cold front approaching the region, then stalling across the area through tonight. Expect MVFR/IFR cigs/vsbys along with showers to persist through 18z Wednesday.

Extended Aviation Outlook: Flight restrictions likely in low clouds and moderate rain through Wednesday evening. Gusty winds expected Wednesday night into Thursday behind a strong cold front.

MARINE. This Evening and Tonight: The area will remain between high pressure centered well offshore and a front approaching from the northwest. Southwest winds will prevail between these two features for much of the night, generally ranging between 10-15 kt with occasional gusts up to 20 kt across northern South Carolina waters. Winds could turn more west heading into daybreak across northern South Carolina waters. Seas should peak between 3-4 ft early, then gradually subside to 2-3 ft tonight.

Latest visible satellite imagery along with webcams and pilot boat observations are still indicating some patchy sea fog across nearshore waters (some dense) as dewpts around 60 remain over cooler shelf waters and winds remain parallel to the coast. Fog could very well linger through much of the night near the South Carolina coast until the front approaches the area and winds begin to turn winds west late.

Strong offshore winds expected Wednesday night through Thursday behind a departing cold front. A period of frequent 35 kt gusts still looks possible over much of the marine area, particularly beyond 15 nm from shore where warmer water temperatures will facilitate deeper mixing. Gale Watches may eventually be needed.

There will be gradual improvement on Thursday as the pressure gradient relaxes. No additional concerns are anticipated through Saturday as high pressure expands over the region. A cold front will approach from the west on Sunday and will bring increasing winds and seas.

CLIMATE. Record high min for 26 January: KCHS: 59/1949 KCXM: 60/1974 KSAV: 62/1974

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



NEAR TERM . DPB SHORT TERM . JRL LONG TERM . ETM AVIATION . DPB/JRL MARINE . DPB/JRL CLIMATE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 19 mi116 min SSW 2.9 G 5.1 64°F 54°F1013.6 hPa (-1.6)
SAXG1 - Sapelo Island Reserve, GA 30 mi116 min SSE 5.1 69°F 1013 hPa (-2.0)64°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 34 mi126 min S 7.8 G 7.8 59°F 57°F3 ft1013.4 hPa (-2.4)59°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 mi2 hrsSW 10 G 1610.00 miPartly Cloudy73°F65°F76%1012.8 hPa
Savannah-Hilton Head International Airport, GA21 mi63 minS 310.00 miOvercast74°F66°F76%1012.7 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA22 mi4 hrsSSW 810.00 miMostly Cloudy73°F66°F79%1013.5 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hr--S7S6--S6S6S7SW5----------SW7SW6----SW8--SW9--SW8SW7SW10
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1 day ago------Calm--Calm----CalmCalm--Calm--CalmCalmCalmCalmS6S7------S8
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2 days ago----------------------------------------E13------

Tide / Current Tables for Florida Passage, Ogeechee River, Georgia
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Florida Passage
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Tue -- 12:41 AM EST     0.01 feet Low Tide
Tue -- 05:43 AM EST     Moonset
Tue -- 06:43 AM EST     7.35 feet High Tide
Tue -- 07:20 AM EST     Sunrise
Tue -- 01:24 PM EST     0.37 feet Low Tide
Tue -- 03:53 PM EST     Moonrise
Tue -- 05:53 PM EST     Sunset
Tue -- 07:08 PM EST     6.28 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.10.92.54.46.17.17.36.75.64.22.61.20.40.51.534.55.76.365.13.82.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Tue -- 12:44 AM EST     0.00 knots Slack
Tue -- 03:30 AM EST     2.17 knots Max Flood
Tue -- 05:43 AM EST     Moonset
Tue -- 07:12 AM EST     -0.00 knots Slack
Tue -- 07:20 AM EST     Sunrise
Tue -- 10:30 AM EST     -1.92 knots Max Ebb
Tue -- 01:37 PM EST     0.00 knots Slack
Tue -- 03:51 PM EST     Moonrise
Tue -- 04:03 PM EST     1.61 knots Max Flood
Tue -- 05:52 PM EST     Sunset
Tue -- 07:34 PM EST     -0.00 knots Slack
Tue -- 10:32 PM EST     -1.66 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.80.31.42.12.11.71.10.2-0.8-1.6-1.9-1.9-1.6-0.70.41.31.61.410.5-0.4-1.2-1.6-1.6

Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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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.