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Marine Weather and Tides
Version 3.4 |
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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 7:27AM | Sunset 6:56PM | Tuesday October 15, 2019 7:52 AM EDT (11:52 UTC) | Moonrise 7:18PM | Moonset 7:54AM | Illumination 97% |  |
AMZ450 Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 300 Am Edt Tue Oct 15 2019
Today..West winds around 5 knots becoming east southeast in the afternoon. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters smooth. Showers likely and a slight chance of Thunderstorms.
Tonight..South southeast winds 15 to 20 knots becoming south southwest after midnight. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Inland waters choppy. Showers likely and a slight chance of Thunderstorms.
Wednesday..West southwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 5 seconds. Inland waters a moderate chop. Showers likely and a slight chance of Thunderstorms.
Wednesday night..Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 9 seconds becoming 4 seconds after midnight. Inland waters a moderate chop. A chance of showers.
Thursday..North northwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 9 seconds. Inland waters a light chop.
Thursday night..North northwest winds 5 to 10 knots. Seas 2 to 3 feet.
Friday..Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Friday night and Saturday..East southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers. A slight chance of Thunderstorms in the morning.
Today..West winds around 5 knots becoming east southeast in the afternoon. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters smooth. Showers likely and a slight chance of Thunderstorms.
Tonight..South southeast winds 15 to 20 knots becoming south southwest after midnight. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Inland waters choppy. Showers likely and a slight chance of Thunderstorms.
Wednesday..West southwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 5 seconds. Inland waters a moderate chop. Showers likely and a slight chance of Thunderstorms.
Wednesday night..Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 9 seconds becoming 4 seconds after midnight. Inland waters a moderate chop. A chance of showers.
Thursday..North northwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 9 seconds. Inland waters a light chop.
Thursday night..North northwest winds 5 to 10 knots. Seas 2 to 3 feet.
Friday..Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Friday night and Saturday..East southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers. A slight chance of Thunderstorms in the morning.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 300 Am Edt Tue Oct 15 2019
Synopsis.. A stalled frontal boundary will remain near the georgia waters through today before lifting north of our region as a warm front tonight. A strong cold front will cross our local waters Wednesday evening. Showers and Thunderstorms will accompany the frontal passage, followed by northwesterly winds in the wake of the front Wednesday night. Winds and seas will diminish by late in the week as high pressure builds into the region.
Gulf stream.. The approximate location of the west wall of the gulf stream as of oct 10, 2019 at 1200 utc... 59 nautical miles east of flagler beach. 72 nautical miles east of saint augustine beach. 87 nautical miles east of jacksonville beach. 97 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.
Synopsis.. A stalled frontal boundary will remain near the georgia waters through today before lifting north of our region as a warm front tonight. A strong cold front will cross our local waters Wednesday evening. Showers and Thunderstorms will accompany the frontal passage, followed by northwesterly winds in the wake of the front Wednesday night. Winds and seas will diminish by late in the week as high pressure builds into the region.
Gulf stream.. The approximate location of the west wall of the gulf stream as of oct 10, 2019 at 1200 utc... 59 nautical miles east of flagler beach. 72 nautical miles east of saint augustine beach. 87 nautical miles east of jacksonville beach. 97 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.
7 Day Forecast for Marine Location Near Darien, GA
Hourly EDIT Helplocation: 31.32, -81.36 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kchs 151049 afdchs area forecast discussion national weather service charleston sc 649 am edt Tue oct 15 2019 Much needed rain will fall over drought stricken areas... . Synopsis A stationary front will remain over or near the area until a strong cold front moves through on Wednesday. High pressure will prevail Thursday and Friday, followed by unsettled weather for the weekend. Near term until 6 pm this evening Expanded and moved up categorical pops by a few hours along the savannah river based on current radar trends. Overall, the forecast is in good shape. The rap and h3r still seem to capture the high temperature distribution well and is similar to the previous forecast. 15 07z surface analysis showed the cold front located roughly along a sylvania-yemassee-north charleston line and is delinted by a well-defined isodrosothermal gradient. Dewpoints in the mid-upper 50s were common north of the boundary with mid-upper 60s to its south. The front will meander ever so slowly to the south this morning, becoming stationary roughly along the i-16 corridor and arcing up along the lower south carolina coastal waters later in the day. This boundary will serve as focus for some much needed wet weather over the next 24-36 hours as a series of perturbations embedded in the southern stream traverse the deep south into south carolina. Regional radar composites show light to locally moderate rainfall breaking out across much of the deep south early this morning. This activity is associated within a region of weak isentropic assent along the nose of tropical moisture plume featuring pwats about 2 standard deviations above the mid- october climatological normal. The far eastern fringes of this area of lift is beginning to infringe across far interior southeast georgia with kclx kvax radars showing light rain already approaching the metter-reidsville-ludowici areas. Area surface observations show this rain band has already produced a few hundredths of inch southwest of vidalia. Guidance is similar in showing 305k isentropic lift steadily increasing along and south of the i-16 corridor through daybreak which will aid in the development expansion of additional shower activity as condensation pressure deficits lower. The degree of lift will further increase and spread to additional isosurfaces later in the day as 925-700 hpa winds veer to a more southerly trajectory and begin to interact with the stationary front within a warm and increasingly moist airmass (pwats ranging from 1.5 inches over the charleston tri-county area to as high a 2.25 inches south of i-16). Expect widespread shower activity to form by mid-morning then slowly expand into southern south carolina through the day. Forecast soundings across southern south carolina show a fairly decent mid-level pocket of dry air is in place, so any isentropically generated rain should initially fall as virga before the column saturates enough to support measurable rainfall. It may very well take until mid-late afternoon for measurable rains to reach as far north at the i-26 corridor and the charleston metro area, although virga sprinkles will likely fall many hours before then. Pops will range 80-90% across the charleston tri-county area to 100% elsewhere. There will be a small risk for tstms near and south of the stationary front where some weak instability will be present. The temperature forecast will be a tricky one today with atypical diurnal curves. Widespread rains and some diabatic cooling will make for a much cooler day over southeast georgia with highs only reaching the lower-mid 70s; coolest in the metter-reidsville areas. Farther to the north across southern south carolina, temperatures should be able to warm into the upper 70s-lower 80s before the onset of light rains and diabatic cooling which will bring temperatures back down into the lower- mid 70s. There is a big bust potential here as any delay or earlier onset of light rains north of the savannah river will have an impact. Short term 6 pm this evening through Friday Tonight: a pronounced southern stream shortwave will approach from the west today. Forcing ahead of this feature coupled with some baroclinicity along the stationary front will induce a weak wave of low pressure across southern georgia by late afternoon which will trek across southeast georgia and southeast south carolina overnight. Although the various synoptic models vary on how pronounced this will low will become (the 15 00z nam being the most aggressive) before emerging out into the atlantic Wednesday, all agree that strong moisture convergence will develop in the vicinity of the stalled cold as an increasing wind field induced by the surface wave becomes favorably aligned with a corridor of deep-layered vertical velocities ahead of the approaching shortwave. This will likely result in an area of enhanced rainfall where the rain could become locally heavy at times within an airmass featuring pwats 2-3 standard deviations above normal. The heaviest rains are expected to fall near and to the east of the track of the surface low, or roughly in a broad corridor from metter and reidsville northeast into the savannah and beaufort metro areas. Nam QPF values look a bit bloated given the likely over development of the surface low, so utilized a model blend with the latest wpc forecast to construct storm totals through sunrise Wednesday. Expect general rainfall amounts of 1-3 inches with localized amounts potentially exceeding 4 inches; highest values located in the above mentioned corridor. Widespread flash flooding appears unlikely given the ongoing drought conditions, but there is a risk for heavy rains to fall around the evening high tide which could cause some issues at the coast. The situation does not necessitate the issuance of a flash flood watch at this time, but would not be surprised to see a few flood advisories issued. Despite the lack of significant surface based instability, a few tstms could still occur given the level of dynamics at play. The risk will generally be confined to the area along south of i-16 and up into the south carolina coastal counties. Breezy conditions will likely be found at the immediate coast with gusts approaching 30-35 mph at times. Lows will range from the mid 60s well inland to the lower 70s at the beaches. Wednesday: the mid-levels will consist of a trough axis stretching from the great lakes region into the southeast in the morning. The axis is forecasted to shift eastward, and offshore of our area by the evening. This will allow west northwest flow to develop overnight. At the surface, a strong cold front will be west of our area in the morning. It's expected to quickly move through in the late afternoon or evening. Widespread showers will be ongoing during daybreak Wednesday due to plenty of moisture in place and lift ahead |
of the front. This is when pops are the highest. Models are in fairly good agreement having these showers move dissipate from west to east during the morning and afternoon hours and we generally showed that trend in the hourly pops. Coastal locations should experience showers the longest, possibly into the afternoon. But things dry out by the evening as the front moves through, then offshore. High pressure then builds from the west. Daytime temperatures may be slightly above normal, reaching these values before the front moves through. On the flip side, lows should be slightly below normal due to the cold air advection and mostly clear skies. Thursday: a mid-level trough is expected to be along or just off the east coast while ridging builds over the central u.S. Broad surface high pressure initially centered over arkansas in the morning will move over the tn valley in the afternoon, prevailing into the evening and overnight. It's southwest periphery will stretch into our area, bringing subsidence, dry conditions, and mostly sunny skies. The most noticeable thing will be the cooler airmass, with daytime temperature struggling to make it to 70 degrees in our sc counties, and the mid 70s in our ga counties. Lows will be very noticeable, falling into the 40s across most of our inland locations, warmer along the immediate coast. Friday: a mid-level trough initially located off the east coast will get pushed away by a strengthening ridge approaching from the west. Broad surface high pressure initially along the central appalachians will shift eastward into the afternoon. Again its periphery will stretch into our area, bringing subsidence, dry conditions, and mostly sunny skies. High temperatures will be similar to Thursday, mainly due to northeast surface winds. Long term Friday night through Monday Models initially start out with decent agreement, showing high pressure moving off the coast Friday night. A gulf of mexico system approaches our area on Saturday. That's where models disagree on whether we receive any precipitation from it. We opted to go with a blend of the models during this time period. By Sunday all of the models show precipitation over our area and this continues into Monday. Hence, we trended wetter during this time period. Aviation 12z Tuesday through Saturday The 06z TAF set seems to capture trends well and was mainly continued with slight modifications. Kchs:VFR through mid-afternoon with conditions deteriorating quickly thereafter. Very light rain will begin to impact the terminal by 18z, but no vsby issues are expected as the rain will be fighting some mid-level dry air. Heavier, widespread rains with both vsbys and CIGS dropping below MVFR thresholds will begin to occur by 21z and continue through the evening. Ifr cigs will start to fill in with the heaviest rains later this evening and prevail through daybreak Wednesday. CIGS were limited to just above alternate minimums for the overnight period. Ksav: conditions will deteriorate this morning as widespread rains begin to move in from the south. The rain will initially be light, but will get heavier through the morning as the vertical column moistens with continued isentropic assent. Think it will take until mid-morning for vsbys and CIGS to drop below MVFR thresholds. Ifr CIGS appear likely by early afternoon as rains intensify. Window of heavy rain with CIGS nearing lifr levels is possible after sunset, which could bring CIGS below alternate minimums. Will limit CIGS to right at 600 ft for now. Extended aviation outlook: conditions will improve Wednesday afternoon with the passage of a cold front. Gusty winds are possible during that time period. High pressure will then bring vfr Wednesday night through Friday. Unsettled weather may bring flight restrictions on Saturday. Marine Today: light winds will give way to increasing northeast to east winds as a cold front stalls near the savannah river. Speeds will generally remain less than 15 kt, although some localized enhancements could occur near the savannah river entrance and up into the beaufort nearshore waters in the vicinity of the front this afternoon. Seas will average 1-3 ft. Tonight: conditions will deteriorate rapidly across the coastal waters tonight as low pressure moves just to the west. Both the nam and GFS show an enhanced wind field developing near the low with frequent gusts possibly reaching gale-force for several hours. A gale watch has been issued for both georgia legs as well as the beaufort county waters in agreement with a blend of the two models, favoring the weaker GFS low depiction. Small craft advisory conditions (20-25 kt) look to occur in the charleston harbor and charleston county nearshore waters prior to daybreak so have gone ahead and hoisted flags beginning at 6 am Wednesday for charleston nearshore leg, but held off on charleston harbor where it looks a bit more marginal. Seas will build to 4-6 ft nearshore waters and 5-7 ft offshore waters overnight. In addition, vsbys could drop below 1 nm at times in periods of heavy rainfall. Wednesday through Saturday: hazardous marine conditions will be ongoing Wednesday morning, ahead of a cold front approaching from the west. Marine headlines will be ongoing during that time period. The cold front is expected to move through Wednesday afternoon or evening, causing winds and seas to trend downwards initially. However, there could be another wind surge with cold air advection around midnight. High pressure will bring tranquil marine conditions Thursday and Friday. Conditions could start to deteriorate on Saturday as a system to our south approaches develops. Tides coastal flooding Elevated tides will continue into Thursday, resulting in the possibility of shallow coastal flooding around the times of the morning high tide, mainly for downtown charleston and nearby areas. Coastal flood advisories are possible. Climate Rainfall records for 15 october: kchs: 3.89 1954 kcxm: 3.49 1954 ksav: 3.03 1971 Chs watches warnings advisories Ga... None. Sc... None. Marine... Gale watch from late tonight through Wednesday morning for amz352-354-374. Small craft advisory from 6 am to 8 pm edt Wednesday for amz350. |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| SAXG1 - Sapelo Island Reserve, GA | 8 mi | 52 min | WSW 7 | 73°F | 1019 hPa (+1.0) | 70°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 27 mi | 62 min | SW 1.9 G 3.9 | 76°F | 79°F | 2 ft | 1018.3 hPa (+0.7) | 70°F |
| 41112 - Offshore Fernandina Beach, FL (132) | 42 mi | 22 min | 79°F | 2 ft | ||||
| FRDF1 - 8720030 - Fernandina Beach, FL | 45 mi | 52 min | N 7 G 11 | 77°F | 79°F | 1019.5 hPa (+1.2) |
Wind History for Fernandina Beach, FL
(wind in knots) EDIT (on/off) Help| 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 | 7 AM | |
| Last 24hr | W | W | W G7 | W | W G5 | N | SE | SE | SE G7 | SE | SE | E | SE | S | SE | SE | S | S | SE | S | S | SW | SW G4 | N G11 |
| 1 day ago | SW | S G5 | S G8 | S G7 | S G7 | SE G10 | SE G11 | SE G14 | SE G15 | SE G13 | SE G10 | SE G10 | SE G8 | SE G8 | SE G8 | SE G8 | SE G8 | S | S | S | S | SW | W | W |
| 2 days ago | NW | N | N G7 | N G8 | N G11 | N G10 | NE G10 | E | E G9 | NE G7 | SE G9 | E G7 | SE | SE G7 | SE | SE | SE G9 | SE G7 | SE | SE | S | S | S | S |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Brunswick / Glynco, GA | 7 mi | 57 min | SSW 7 | 7.00 mi | Light Rain | 70°F | 69°F | 97% | 1019 hPa |
| Brunswick, Malcolm McKinnon Airport, GA | 12 mi | 59 min | SW 7 | 5.00 mi | Rain Fog/Mist | 71°F | 68°F | 90% | 1019 hPa |
Link to 5 minute data for KBQK
Wind History from BQK (wind in knots)
| 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 | 7 AM | 8 AM | |
| Last 24hr | Calm | SW | W | W | W | W | W | NW | N | Calm | E | SE | Calm | S | Calm | Calm | S | S | Calm | Calm | Calm | W | SW | SW |
| 1 day ago | SW | SW | SW | SW | SW | S | SE | SE | SE | S | SE | S | S | S | S | S | S | SW | SW | SW | SW | W | W | E |
| 2 days ago | Calm | Calm | NE | N | N | W | Calm | SE | SE | SE | SE | SE | S | SE | S | S | S | S | SW | Calm | Calm | SW | SW | SW |
Tide / Current Tables for Jones Creek entrance, Hampton River, Georgia
EDIT Weekend mode (on/off) (on/off) Help One Week of DataJones Creek entrance
Click for Map
Tue -- 03:50 AM EDT 0.52 feet Low Tide
Tue -- 07:28 AM EDT Sunrise
Tue -- 08:54 AM EDT Moonset
Tue -- 10:36 AM EDT 8.33 feet High Tide
Tue -- 04:14 PM EDT 0.84 feet Low Tide
Tue -- 06:53 PM EDT Sunset
Tue -- 08:17 PM EDT Moonrise
Tue -- 10:57 PM EDT 7.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 03:50 AM EDT 0.52 feet Low Tide
Tue -- 07:28 AM EDT Sunrise
Tue -- 08:54 AM EDT Moonset
Tue -- 10:36 AM EDT 8.33 feet High Tide
Tue -- 04:14 PM EDT 0.84 feet Low Tide
Tue -- 06:53 PM EDT Sunset
Tue -- 08:17 PM EDT Moonrise
Tue -- 10:57 PM EDT 7.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 6.5 | 4.7 | 2.7 | 1.1 | 0.5 | 1.1 | 2.5 | 4.3 | 6.1 | 7.4 | 8.2 | 8.2 | 7.3 | 5.6 | 3.6 | 1.9 | 0.9 | 1.1 | 2.1 | 3.6 | 5.2 | 6.5 | 7.3 | 7.6 |
Tide / Current Tables for Old Tower, Sapelo Island, Georgia
EDIT (on/off) Help One Week of DataOld Tower
Click for Map
Tue -- 03:50 AM EDT 0.49 feet Low Tide
Tue -- 07:28 AM EDT Sunrise
Tue -- 08:54 AM EDT Moonset
Tue -- 09:45 AM EDT 7.94 feet High Tide
Tue -- 04:14 PM EDT 0.80 feet Low Tide
Tue -- 06:53 PM EDT Sunset
Tue -- 08:17 PM EDT Moonrise
Tue -- 10:06 PM EDT 7.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 03:50 AM EDT 0.49 feet Low Tide
Tue -- 07:28 AM EDT Sunrise
Tue -- 08:54 AM EDT Moonset
Tue -- 09:45 AM EDT 7.94 feet High Tide
Tue -- 04:14 PM EDT 0.80 feet Low Tide
Tue -- 06:53 PM EDT Sunset
Tue -- 08:17 PM EDT Moonrise
Tue -- 10:06 PM EDT 7.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 5.3 | 3.8 | 2.1 | 0.9 | 0.5 | 1.3 | 2.9 | 4.9 | 6.6 | 7.7 | 7.9 | 7.3 | 6.1 | 4.6 | 2.9 | 1.6 | 0.8 | 1.1 | 2.3 | 4 | 5.7 | 6.8 | 7.2 | 7 |
Weather Map
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GEOS 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Charleston, SC (7,2,3,4)
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Ground Weather Radar Station Jacksonville, FL
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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. |