Friday, June22, 2018 L-36.com


Marine Weather and Tides
Thunderbolt, GA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:17AMSunset 8:34PM Friday June 22, 2018 7:04 AM EDT (11:04 UTC) Moonrise 2:38PMMoonset 1:45AM Illumination 66% Phase: Waxing Gibbous; Moon at 9 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- 658 Am Edt Fri Jun 22 2018
Today..SW winds 10 to 15 kt. Seas 2 ft. A slight chance of showers and tstms this afternoon.
Tonight..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Sat..SW winds 10 to 15 kt. Seas 2 ft.
Sat night..SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms in the evening.
Sun..SW winds 10 kt, becoming S in the afternoon. Seas 2 ft. A slight chance of showers and tstms.
Sun night..SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 ft. A slight chance of showers and tstms in the evening.
Mon..SW winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms.
Mon night..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue..NE winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms.
Tue night..E winds 10 to 15 kt. Seas 2 ft. A chance of showers with a slight chance of tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 658 Am Edt Fri Jun 22 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Abnormally hot temperatures will continue into early next week before a cold front moves through Monday night with cooler and drier conditions to follow through the middle of next week.

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


Area Discussion for - Charleston, SC
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Fxus62 kchs 220811
afdchs
area forecast discussion
national weather service charleston sc
411 am edt Fri jun 22 2018

Synopsis
Abnormally hot temperatures will continue into early next week
before a cold front moves through Monday night with cooler and
drier conditions to follow through the middle of next week.

Near term through tonight
Pre-dawn: we have seen some weak mid level height falls overnight
in far north ga and upstate sc as a cut-off low translates
toward the ohio valley. A band of slightly deeper moisture was
approaching from the northwest and should move into our western
zones by dawn. Several of the hot-start cams have continued to
show convective initialization by daybreak in the axis of this
slightly higher ribbon of moisture but models like the hrrr
which was showing showers by 3 am appear to be overdone given
currently radar and satellite imagery. We certainty do not rule
out isolated activity but we maintain silent pops for now. It
is even warmer this morning than 24 hours ago, little change to
the ongoing steamy conditions.

Today: a band of higher mid and upper level moisture will
continue to move through the forecast area through the first
half of the day, easing offshore this afternoon. The progressive
nature of this deeper moisture translation will likely make for
a less favorable convective initiation environment by peak
heating, since drier and warm mid level air will be advecting
in from west to east. Forecast soundings show a 2c-3c cap early
on, breaking by early afternoon but that is when we see more mid
level subsidence in the models and soundings. We maintained
mainly slight chance pops given this setup with a potential that
most areas remain dry. The only area we have chance pops are
along the southern ga coastal zones where intersections of the
gulf coast and pinned atlantic sea breeze may result in a
brief period of scattered convection.

Excessive heat: another hot and humid day on tap as highs
continue to run well above normal. The sea breeze will be a
slow mover and mainly pinned again today with some evidence that
slightly higher surface dew points are possible in the coastal
corridor. We have a heat advisory for mainly coastal zones to
account for at least a couple hours of heat indices in the 105
to 107 range.

Tonight: our region will be on the edge of deeper layered
troughing to the northwest. Models keep most of the nocturnal
convection potential inland from our area but we did keep
some slight chance pops for a period in our zones bordering
the csra and sc midlands. Another warm humid night with lows
mid to upper 70s, close to 80 immediate coast.

Short term Saturday through Monday
The area will remain under the influence of atlantic high pressure
centered offshore and an inland trough of low pressure, at least
until Monday when a cold front will approach. This pattern will keep
low-level winds mainly offshore which will help keep the sea breeze
close to the coast each day, especially in ga. It will also allow
temperatures to remain above normal, possibly near record levels
(especially lows). Some inland spots could near the century mark
(100 degrees) Sunday and Monday. Moderate to occasionally high
levels of humidity, especially near the coast after the sea breeze
passage, should yield heat indices peaking above heat advisory
criteria (105 degrees) for most of the area Saturday and closer to
110 degrees Sunday and Monday. Rain chances should be at or below
normal given the generally weak forcing although there is still some
uncertainty later Monday afternoon given the proximity of the front
and some shortwave energy aloft. Some of the storms could be pretty
strong too given the high dcape values (1000+ j kg) seen on model
forecast soundings.

Long term Monday night through Thursday
The latest medium range model guidance suggests a backdoor cold
front will move through Monday night into Tuesday as high pressure
moves into the mid-atlantic. Slightly drier and cooler conditions
should then prevail through mid week. The best rain chances amounts
look to be Monday night into Tuesday, but could linger into
Wednesday especially in ga which will be closer to the front.

Aviation 08z Friday through Tuesday
Currently the chances for convection at the terminals remain too
low for any TAF inclusions until radar trends dictate otherwise.

Therefore,VFR will prevail.

Extended aviation outlook: generallyVFR through Monday except for
mainly afternoon showers thunderstorms. Better chance for
restrictions Monday night into Tuesday as a cold front moves
through.

Marine
No significant changes to the overall synoptic pattern and thus
the forecast for the local waters. Low level wind fields are
decent and the sc land sea interface of charleston county will
likely see some 20 kt gusts as the sea breeze oscillation gets
cranking mid to late afternoon. Otherwise, near shore speeds
from the south and southwest will average 15 kt after a midday
lull with seas continuing in the 2-3 ft range, choppiest during
the breezier parts of the late afternoon and evening hours.

Saturday through Wednesday: high pressure will persist to the east
through Monday while a pronounced surface trough lingers inland. The
resulting pressure gradient will maintain considerable southwest
flow over the waters. A robust afternoon sea breeze is expected each
day, with winds near the charleston county coast occasionally
gusting to 15-20 kt or so. Winds should shift out of the
northeast east behind a cold front Monday night into Tuesday.

Advisory conditions are not anticipated through the period.

Chs watches warnings advisories
Ga... Heat advisory from 1 pm this afternoon to 7 pm edt this
evening for gaz116>119-138>141.

Sc... Heat advisory from 1 pm this afternoon to 7 pm edt this
evening for scz043>045-048>052.

Marine... None.

Near term...

short term... Rjb
long term... Rjb
aviation... Rjb
marine... Rjb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi52 min W 5.1 G 8 80°F 82°F1012.1 hPa
41033 37 mi56 min W 7.8 G 9.7 82°F 82°F1010.7 hPa
SAXG1 - Sapelo Island Reserve, GA 45 mi64 min W 9.9 80°F 1012 hPa (+2.0)74°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 45 mi74 min WSW 16 G 18 82°F 82°F2 ft1011 hPa (+1.0)
ACXS1 - ACE Basin Reserve, SC 47 mi79 min Calm 78°F 1011 hPa75°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, GA6 mi68 minW 410.00 miFair77°F72°F86%1011.1 hPa
Savannah-Hilton Head International Airport, GA11 mi71 minW 510.00 miPartly Cloudy77°F73°F88%1011.7 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi69 minVar 410.00 miFair81°F75°F84%1011.2 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmW4W5W5W7W7NW9NW5NW6W10
G16
SW10W4SW7S5S5S5SW6SW3SW5SW6W4W3SW5W4
1 day agoW4CalmCalmCalmSW3CalmS6SE6SE9W13
G22
E4S3CalmS6SW5N5W3SW3CalmSW3CalmCalmSW3Calm
2 days agoCalmSW5SW6CalmCalmS4SW4S4S9SE11SE9S8S9S9
G15
S6S7S5SW5S5CalmCalmCalmCalmCalm

Tide / Current Tables for Thunderbolt, Wilmington River, Georgia
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Thunderbolt
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Fri -- 02:44 AM EDT     Moonset
Fri -- 04:37 AM EDT     7.95 feet High Tide
Fri -- 06:18 AM EDT     Sunrise
Fri -- 10:48 AM EDT     -0.07 feet Low Tide
Fri -- 03:37 PM EDT     Moonrise
Fri -- 05:23 PM EDT     8.44 feet High Tide
Fri -- 08:33 PM EDT     Sunset
Fri -- 11:29 PM EDT     0.45 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.63.25.16.87.87.975.53.61.70.3-00.62.24.16.17.68.48.37.35.73.71.80.6

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Fri -- 01:51 AM EDT     1.99 knots Max Flood
Fri -- 02:44 AM EDT     Moonset
Fri -- 05:18 AM EDT     -0.00 knots Slack
Fri -- 06:17 AM EDT     Sunrise
Fri -- 08:50 AM EDT     -2.08 knots Max Ebb
Fri -- 11:25 AM EDT     0.00 knots Slack
Fri -- 02:18 PM EDT     2.16 knots Max Flood
Fri -- 03:37 PM EDT     Moonrise
Fri -- 05:59 PM EDT     -0.00 knots Slack
Fri -- 08:32 PM EDT     Sunset
Fri -- 09:36 PM EDT     -2.37 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.821.81.30.3-0.8-1.6-1.9-2.1-1.7-0.60.81.72.12.11.81.1-0-1.1-1.8-2.3-2.3-1.6

Weather Map and Satellite Images
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wmap_A
GOES 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.
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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 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 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.