Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Thunderbolt, GA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:22AMSunset 7:38PM Saturday March 23, 2019 5:04 PM EDT (21:04 UTC) Moonrise 9:43PMMoonset 8:21AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 259 Pm Edt Sat Mar 23 2019
Tonight..E winds 5 to 10 kt. Seas 2 ft.
Sun..SE winds 5 to 10 kt. Seas 2 ft.
Sun night..S winds 10 kt. Seas 2 ft.
Mon..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft. A slight chance of showers and tstms in the afternoon.
Mon night..SW winds 10 to 15 kt, becoming W after midnight. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue..NW winds 10 to 15 kt, becoming ne 15 to 20 kt in the afternoon. Seas 2 ft, building to 3 to 4 ft in the afternoon. A chance of showers.
Tue night..NE winds 20 kt with gusts to 25 kt. Seas 4 to 6 ft, building to 5 to 7 ft after midnight. A chance of showers, mainly in the evening.
Wed..NE winds 20 kt. Seas 5 to 7 ft.
Wed night..NE winds 15 to 20 kt. Seas 5 to 7 ft.
Thu..NE winds 15 to 20 kt. Seas 5 to 7 ft.
Thu night..NE winds 10 to 15 kt. Seas 5 to 7 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 259 Pm Edt Sat Mar 23 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will persist through early Monday. Low pressure will cross the region Monday night followed by a strong cold front Tuesday. Another low pressure will develop off the southeast coast and will gradually move away through midweek. As the low departs, high pressure will build into the area and will prevail into next weekend.


7 Day Forecast for Marine Location Near Thunderbolt, GA
   Hourly   EDIT   Help
location: 32.04, -81.04     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 231947
afdchs
area forecast discussion
national weather service charleston sc
347 pm edt Sat mar 23 2019

Synopsis
High pressure will persist through early Monday. Low pressure
will cross the region Monday night followed by a strong cold
front Tuesday. Another low pressure will develop off the
southeast coast and will gradually move away through midweek.

As the low departs, high pressure will build into the area and
will prevail into next weekend.

Near term until 6 am Sunday morning
As of 340 pm: the center of sfc high pressure will build over
the eastern carolinas late tonight. At the mid levels, the axis
of a h5 ridge will ripple over the area by 9z Sunday. Sky will
remain clear through late tonight, a few thin cirrus should
arrive during the pre- dawn hours Sunday. The combination little
to no cloud cover, calm winds, and wide dewpoint depressions
will provide excellent radiational cooling conditions tonight. I
will favor the cooler guidance for low temperatures, expecting
temperatures between 40 to 45 degrees.

Short term 6 am Sunday morning through Tuesday
Sunday: high pressure will provide another dry day. Onshore flow
will hold temps in the 60s on the beaches, but high in the mid upper
70s will be common away from the immediate coast. High level clouds
will stream into the region from the west.

Sunday night: atlantic high pressure will maintain rain-free
conditions. By early Monday temperatures will bottom out around 50f
inland and in the mid-upper 50s on the coast.

Monday: atlantic high pressure will retreat from the region, and
low pressure will approach the region from the west. The morning
should remain rain-free. Then, ahead of the advancing shortwave
trough aloft and associated surface low, warm conveyor belt moisture
should spread into the region during the afternoon. Latest afternoon
pops are graduated from chance inland to slight chance closer to the
coast, with lowest pops across far southern counties.

Monday night: the lead shortwave trough aloft and associated surface
low will translate east across the region. Deep-layered forcing for
ascent associated moisture will support scattered to numerous
showers, with best precip coverage during the first half of the
night. To address this scenario, evening pops range from likely
north to chance south, then overnight pops settle back to 30-50
percent across the region.

Also of note, Monday afternoon and Monday evening, showers could
also be accompanied by isolated thunderstorms. However, model
instability remains weak and appears unfavorable for any severe
weather.

Tuesday, the low pressure will push offshore, and a strong cold
front will push through the region from north to south. This front
will bring an abrupt wind shift to the northeast and will signal a
rapid change to a below-normal temperature regime that will persist
until late week. Also, persistent moisture within the associated
baroclinic zone could support isolated scattered showers through
Tuesday.

Long term Tuesday night through Saturday
Low pressure will develop off the coast Tuesday night Wednesday and
will only gradually move away from the coast through Thursday. As a
result, showers could remain over or close to the coast through
midweek, and elevated northeast winds below-normal temps could
persist through Thursday. The, building high pressure will help push
temps into the upper 70s around 80 late next week into at least
early next weekend.

Aviation 20z Saturday through Thursday
Vfr conditions will prevail at kchs and ksav through 18z
Sunday.

Extended aviation outlook: flight restrictions possible Monday
night through Tuesday night.

Marine
Building high pressure will result in light east winds across the
marine zones tonight. Seas will range from around 1 foot near shore
to 3 feet across the outer ga waters.

Sunday through Thursday night: on the periphery of atlantic high
pressure, southeast winds will be enhanced by the sea breeze Sunday.

Then, ahead of approaching low pressure, winds will turn to the
south southwest Sunday night and Monday, and a few gusts could
exceed 20 kt Monday Monday evening. Then, a strong cold front will
cross the waters from north to south late Monday night into Tuesday,
and winds will shift sharply to the northeast and will intensify.

Then, due to the tightening gradient between high pressure building
from the north and low pressure developing offshore, winds seas
could easily reach small craft advisory levels most areas Tuesday
through midweek, and gale force gusts could occur, especially beyond
20 nm.

Tides coastal flooding
Between strong high pressure building from the north and low
pressure developing off the coast, strong northeast winds will
create elevated tide levels along the coast Tuesday through
Thursday. While astronomical factors do not favor tidal flooding,
probabilistic guidance depicts a low chance for minor salt water
flooding, especially Wednesday. We will continue to assess this
scenario during the next several days.

Equipment
The kclx radar remains out of service. Repairs are expected to occur
Monday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Ned
short term... Spr
long term... Spr
aviation... Ned spr
marine... Ned spr
tides coastal flooding... Spr
equipment... Spr


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 7 mi35 min E 11 G 13
41033 37 mi57 min SE 7.8 G 9.7 59°F 60°F1024.2 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 45 mi75 min ENE 14 G 16 62°F 62°F3 ft1023.8 hPa (-0.3)49°F
SAXG1 - Sapelo Island Reserve, GA 45 mi65 min E 11 66°F 1024 hPa (-1.0)49°F
ACXS1 - ACE Basin Reserve, SC 47 mi80 min S 2.9 62°F 1024 hPa42°F

Wind History for Fort Pulaski, GA
(wind in knots)    EDIT      (on/off)   Help
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
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
Last
24hr
NW17
G21
NW11
G14
W12
G15
W6
G9
W7
G10
W6
G10
W9
G13
NW12
W10
W9
W11
NW9
NW7
NW7
N5
G8
NE8
E17
E15
G19
E17
E14
G17
E13
G16
E11
E10
1 day
ago
S8
G12
SW4
G8
W15
G19
W12
G16
W15
G20
W15
NW17
W14
G17
W10
G14
W7
W10
W12
G15
W15
NW14
NW12
NW12
G15
NW13
G16
NW12
NW13
NW13
G16
W9
W13
NW15
W11
G15
2 days
ago
E10
SE6
G9
NE10
G13
NE11
G14
NE8
NE7
NE4
NE3
NW6
N7
N6
N6
NW5
N5
NW5
NW3
SW3
SW5
G8
SW6
W7
G10
SW6
G9
SW9
G13
S8
G14
S9
G14

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA6 mi2.1 hrsENE 910.00 miFair67°F39°F37%1024 hPa
Savannah-Hilton Head International Airport, GA11 mi72 minE 710.00 miA Few Clouds67°F36°F32%1023.9 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi75 minE 810.00 miFair61°F39°F45%1024.7 hPa

Wind History from SVN (wind in knots)
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
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrW15
G18
W13W15W7W6W7W8W7W7W8W6W5W7W6NW4N3N9NE9E12E15E11E12E9E11
1 day agoW12
G18
W19
G26
W12W12--W10W10W9W6W7W8W8W10W7W7W6NW10NW10NW8NW7W6
G14
W14
G18
W10
G18
W14
G19
2 days agoNE10N8N7CalmNE5NE4CalmN5N3N3W3W3W5CalmCalmCalmCalmSW8--W12SW7SW12
G16
W9
G16
--

Tide / Current Tables for Thunderbolt, Wilmington River, Georgia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Thunderbolt
Click for Map
Sat -- 05:00 AM EDT     -1.54 feet Low Tide
Sat -- 07:24 AM EDT     Sunrise
Sat -- 09:21 AM EDT     Moonset
Sat -- 11:15 AM EDT     9.03 feet High Tide
Sat -- 05:13 PM EDT     -1.18 feet Low Tide
Sat -- 07:37 PM EDT     Sunset
Sat -- 10:42 PM EDT     Moonrise
Sat -- 11:45 PM EDT     9.33 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
8.97.24.61.8-0.6-1.5-0.81.23.86.38.298.77.252.40.1-1.1-0.70.93.35.87.89

Tide / Current Tables for Savannah River Entrance, Georgia Current
   EDIT      (on/off)   Help   One Week of Data
Savannah River Entrance
Click for Map
Sat -- 03:02 AM EDT     -2.80 knots Max Ebb
Sat -- 05:45 AM EDT     0.01 knots Slack
Sat -- 07:23 AM EDT     Sunrise
Sat -- 08:18 AM EDT     2.61 knots Max Flood
Sat -- 09:20 AM EDT     Moonset
Sat -- 11:53 AM EDT     -0.00 knots Slack
Sat -- 03:07 PM EDT     -2.51 knots Max Ebb
Sat -- 05:55 PM EDT     0.00 knots Slack
Sat -- 07:36 PM EDT     Sunset
Sat -- 08:35 PM EDT     2.65 knots Max Flood
Sat -- 10:42 PM EDT     Moonrise
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
-0.6-1.8-2.5-2.8-2.5-1.30.41.92.62.51.91.1-0.1-1.4-2.2-2.5-2.3-1.40.11.62.52.62.21.5

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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 (17,4,5,8)
      (on/off)   Help

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

Ad by Google

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.