Thursday, January23, 2020
Privacy Policy
L-36.com


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 7:20AMSunset 5:50PM Thursday January 23, 2020 6:36 AM EST (11:36 UTC) Moonrise 6:29AMMoonset 4:47PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 623 Am Est Thu Jan 23 2020
.small craft advisory in effect through this evening...
Today..NE winds 15 to 20 kt. Gusts to 25 kt this morning. Seas 5 to 7 ft, subsiding to 4 to 6 ft. Seas 3 to 4 ft near the coast. Isolated showers, mainly this morning.
Tonight..NE winds 10 to 15 kt with gusts to 20 kt, becoming se after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft. A slight chance of showers.
Fri..S winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft. A chance of showers. A slight chance of tstms in the afternoon.
Fri night..SW winds 10 to 15 kt, becoming W after midnight. Seas 3 to 4 ft. Showers likely with a slight chance of tstms in the evening, then a slight chance of showers after midnight.
Sat..W winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft.
Sat night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Sun..NW winds 10 kt. Seas 2 to 3 ft.
Sun night..NW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers.
Mon..NW winds 5 to 10 kt. Seas 1 foot. A slight chance of showers.
Mon night..NW winds 5 to 10 kt. Seas 1 foot. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 623 Am Est Thu Jan 23 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A storm system will impact the region tonight through Friday night. High pressure will return Saturday and persist into early next week before a weak low pressure system approaches the area during the middle of next week.


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


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KCHS 231127 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 627 AM EST Thu Jan 23 2020

SYNOPSIS. A storm system will impact the region tonight through Friday night. High pressure will return Saturday and persist into early next week before a weak low pressure system approaches the area during the middle of next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Minor adjustments were made to introduce slight chance pops along the middle Georgia about 1-2 hours earlier than previously advertised. The rest of the forecast is on track.

H5 ridging will steady break down today as a deep trough over the Plains is reinforced by a shortwave digging southeast out of eastern Wyoming. A weak coastal trough is beginning to take shape off the Georgia and southern South Carolina coastal waters early this morning and will slowly sharpen through the day in response to high pressure shifting offshore the Mid- Atlantic states. The combination of weak coastal convergence induced by steady northeast winds from off the Atlantic and subtle 290-295K isentropic assent atop the coastal trough could provide just enough forcing produce isolated shower activity along the Georgia coast later today. High resolution guidance is not overly aggressive on the development of measurable rainfall within the resident dry and stable airmass that has been in place for the past few days, but there is enough of signal in the guidance to support 20% pops along parts of the Georgia coastal counties, mainly this morning.

The various statistical guidance packages have been exhibiting a rather cool bias over the past several days and the 23/00z cycle looks to be no different. H8 temperatures will remain nearly static through late morning, but are forecast to begin to slowly rise in response to increasing warm air advection ahead of the approaching storm system. Generally favored the warmer RAP and H3R hourly temperatures over the NAM/GFS/ECMWF- based MOS products to derive the high temperature forecast, but did not go quite as warm as some of the other mesoscale members would suggest. Forecast soundings do show quite a bit of warm air aloft atop a strong low-level inversion and if the inversion can mix out sufficiently by early afternoon, these warmer numbers could be realized. For now, highs from the upper 50s to around 60 will be highlighted, but further refinements will be made as the day progresses.

SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY/. Tonight: A powerful upper low will dig into the mid-Mississippi Valley tonight. Strong warm air advection/isentropic assent within a strong low-level jet will support a rather large area of rainfall moving across the Deep South and eventually the Southeast States overnight. The coastal trough will eventually move inland and north as warm frontal feature late, bringing the entire forecast area within the warm sector by sunrise Friday. As has been the case all winter, the synoptic models appear to be too slow with the eastward movement of the rain shield. Most of the higher resolution guidance members, including the H3R, are about 2-4 hours quicker than the 23/00z synoptic mean, which looks more reasonable based on cold-season model trends. Expect numerous showers to be impacting the area along/west of the I-95 corridor by daybreak and pops have been adjusted to reflect this. Pops will range from 60-70% west of I-95 to 30-50% elsewhere. Rainfall amounts will be light, generally averaging only a few hundredths prior to daybreak. Lows will range from the mid 40s inland to the lower-mid 50s at the coast, but these will likely occur at various times through the night with temperatures either hold steady or very slowly rising at the coast late as the warm frontal feature approaches the coast and moves north.

Friday: Strong isentropic lift associated with a northward moving coastal trough/warm front should support scattered to numerous showers across the area to start off the day ahead of a low pressure system and associated sfc cold front approaching the region from the west during the afternoon/evening. Southerly flow will help drive warm and moist air across the area ahead of the approaching cold front, favoring greater precip coverage as the front enters western zones late afternoon/early evening. A few thunderstorms could occur along/ahead of the front, mainly during afternoon/evening hours when temps are warmest, but widespread clouds and previous showers should limit overall instability. Given the setup, any thunderstorms are expected to remain weak as the front pushes through the area. In general, high temps should range in the mid/upper 60s (warmest across Southeast Georgia). Numerous to potentially widespread showers should continue to track across the area with the cold front during evening hours, then quickly shift offshore around midnight as dry high pressure builds in wake of the departing front. Overnight lows should dip into the low/mid 40s post fropa.

Saturday: Dry sfc high pressure will spread across the region along the southern edge of a large mid-lvl trough centered over the eastern Great Lakes. Temps will be cooler within a west sfc wind, ranging in the mid/upper 50s inland and north to around 60 degrees closer to the coast and south of I-16. These sfc temps along with cold air advection aloft should help produce sufficient mixing into 30-40 kt low-lvl wind fields, thus favoring 15-20 mph westerly sfc winds during peak heating hours (highest near the coast). Dry high pressure will prevail through overnight hours. Clear skies and weaker winds should support low temps in the mid/upper 30s away from the coast.

Sunday: Weak high pressure will remain centered west of the region while low pressure tracks east across the Gulf of Mexico. The pattern will result in another day of dry weather, but slightly warmer temps than the previous day along the base of a mid-lvl trough of low pressure centered over the Northeast. In general, afternoon highs should reach the upper 50s to lower 60s, warmest across Southeast Georgia.

LONG TERM /SUNDAY NIGHT THROUGH WEDNESDAY/. Sfc high pressure will gradually weaken across the area Sunday night into Monday while low pressure quickly tracks across the Gulf of Mexico and Florida. A few showers are possible, mainly across southern most locations in Southeast Georgia, but the bulk of precip activity will likely shift offshore during daylight hours Monday. Dry high pressure should then prevail Monday afternoon through Tuesday night, before another low pressure system tracks across the Deep South and arrives over the Southeast midweek. Isolated to scattered showers are possible Wednesday and Thursday until the system shifts offshore.

In general, high temps should range in the upper 50s/lower 60s Sunday and Monday, then warm into the lower/middle 60s Tuesday, followed by middle/upper 60s Wednesday and Thursday. Overnight lows should dip into the upper 30s inland to lower 40s near the coast Sunday night and Monday night, then remain in the lower/mid 40s Tuesday night and upper 40s/lower 50s Wednesday night.

AVIATION /12Z THURSDAY THROUGH MONDAY/. No change from the previous thinking at 06z. VFR at both KCHS and KSAV through the day with increasing chances for IFR to MVFR cigs developing by late afternoon/early evening, especially at KSAV. High resolution guidance suggests isolated showers could make a run for the upper Georgia coast mid-late morning, but suspect any activity will remain east of KSAV. Isolated showers could also approach KCHS after 03z tonight, but impact probabilities are too low to justify a mention. Cigs should remain above alternate minimums through the period.

Extended Aviation Outlook: Flight restrictions are likely at both KCHS and KSAV terminals Friday and Friday night due to showers and low clouds associated with a passing cold front. VFR conditions are then expected to return at both terminals by daybreak Saturday and persist through Monday.

MARINE. Through Tonight: Pinched gradient conditions will linger through the day before diminishing tonight as inland high pressure weakens and a coastal trough approaches the coast. Northeast winds will gradually veer east and southeast through the night as the coastal trough approaches the coast. Winds 15-20 kt with gusts to 25 kt (slightly higher over the Georgia offshore waters early) will diminish to 10-15 kt tonight. Seas will range from 3-4 ft near the immediate coast to as high as 8-10 ft over the Georgia offshore waters today will subside to 2-5 ft nearshore with 6-8 ft Georgia offshore waters tonight. Small Craft Advisories remain in force for all legs with the exception of Charleston Harbor.

Friday through Monday: A coastal trough along the Southeast Coast will lift north early Friday morning ahead of a low pressure system quickly advancing toward the region from the west. A cold front associated with this system will likely shift offshore and across coastal waters Friday night before high pressure builds across the area and persists into early next week. Southerly winds should top out in the 15-20 kt ahead of the cold front, then turn west behind the front Saturday. As this occurs, marine conditions are expected to remain below Small Craft Advisory levels with the exception of offshore Georgia waters where an ongoing Small Craft Advisory will persist into Saturday night due to elevated seas between 5-7 ft. On Sunday, winds/seas will continue to decrease/subside as weak high pressure persists across the region, bringing an end to the Small Craft Advisory across offshore Georgia waters shortly after daybreak Sunday morning. Conditions should then remain well below Small Craft Advisory levels on Monday as weakened high pressure persists across the region while a low pressure system passes south of the area.

TIDES/COASTAL FLOODING. Tide levels are expected to peak 7.1-7.3 ft MLLW in the Charleston Harbor for this morning's high tide cycle. A Coastal Flood Advisory has been posted for Charleston and coastal Colleton Counties until 9 AM. Shallow coastal flooding is likely in the normally flood prone areas with some road closures possible in Downtown Charleston.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Coastal Flood Advisory until 9 AM EST this morning for SCZ049- 050. MARINE . Small Craft Advisory until 11 PM EST this evening for AMZ352- 354. Small Craft Advisory until 10 AM EST Friday for AMZ350. Small Craft Advisory until 7 AM EST Sunday for AMZ374.




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 19 mi55 min 45°F 52°F1023.2 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 34 mi47 min NE 19 G 25 55°F 58°F8 ft1020.8 hPa (-0.4)53°F

Wind History for Fort Pulaski, GA
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
Last
24hr
N11
G14
NE15
G19
NE12
G15
NE13
G17
NE12
G15
NE12
G17
NE11
G14
NE12
G16
E10
E11
E11
NE11
E10
G13
NE9
N11
G14
NE12
NE12
NE14
NE13
G17
NE13
G18
NE14
G18
NE13
G17
NE13
G17
NE13
G16
1 day
ago
NE17
G22
N17
G22
NE16
N16
N17
G23
N14
G19
N15
G21
NE16
G20
N16
G21
N20
N15
G21
N13
G17
N13
G16
N10
G23
NE18
G24
N11
G16
N11
G15
N10
G14
N11
G16
N12
NW10
NW11
G14
N14
G19
N13
G19
2 days
ago
N15
G19
N11
G14
NE14
G18
NE13
G19
NE12
G16
NE11
NE10
G13
NE8
G11
NE8
G11
NE9
NE9
NE10
N10
NE11
G14
NE9
G12
NE13
G17
NE13
G17
NE10
G13
N10
NE12
G16
N10
N10
N14
G19
NE13
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
Last 24hrN6N5NE7N7
G16
N7
G16
N7N8NE9E10NE5E8N6NE3N3N8N9N5N5NE4NE5NE5NE5N4N3
1 day agoN7N8N11
G18
N15
G19
N16
G24
N15
G22
N13
G17
N11
G19
--N10
G18
NW9
G17
N5N7N5N5N8N7N7N5N6N6N4N10
G16
N4
2 days agoN9N9N12
G16
NE12N10N9
G16
NE9NE4NW7N6N7N9N7N6NE6NE5NE6N3N3N4N6N6N6N8

Tide / Current Tables for Florida Passage, Ogeechee River, Georgia
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Florida Passage
Click for Map
Thu -- 01:23 AM EST     -0.46 feet Low Tide
Thu -- 06:29 AM EST     Moonrise
Thu -- 07:22 AM EST     Sunrise
Thu -- 07:33 AM EST     7.80 feet High Tide
Thu -- 02:08 PM EST     -0.28 feet Low Tide
Thu -- 04:47 PM EST     Moonset
Thu -- 05:50 PM EST     Sunset
Thu -- 07:40 PM EST     6.72 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
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
0.5-0.4-0.212.956.77.77.775.7420.4-0.30.21.63.65.46.56.76.14.93.3

Tide / Current Tables for Savannah River Entrance, Georgia Current
   EDIT      (on/off)   Help   One Week of Data
Savannah River Entrance
Click for Map
Thu -- 01:33 AM EST     0.00 knots Slack
Thu -- 04:35 AM EST     2.08 knots Max Flood
Thu -- 06:28 AM EST     Moonrise
Thu -- 07:21 AM EST     Sunrise
Thu -- 08:19 AM EST     -0.00 knots Slack
Thu -- 11:48 AM EST     -2.41 knots Max Ebb
Thu -- 02:24 PM EST     0.01 knots Slack
Thu -- 04:45 PM EST     Moonset
Thu -- 04:57 PM EST     1.68 knots Max Flood
Thu -- 05:48 PM EST     Sunset
Thu -- 08:23 PM EST     -0.00 knots Slack
Thu -- 11:57 PM EST     -1.92 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
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
-1.7-0.70.61.622.11.91.40.4-0.7-1.6-2.2-2.4-1.8-0.60.71.51.71.61.20.4-0.6-1.3-1.7

Weather Map
       (on/off)   Help Weather Map
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 (6,6,7,8)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.