Marine Weather and Tides
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.
|Sunrise 7:09AM||Sunset 7:21PM||Friday September 21, 2018 11:55 AM EDT (15:55 UTC)||Moonrise 4:44PM||Moonset 2:51AM||Illumination 89%|
7 Day Forecast for Marine Location Near Ridgeland, SCHourly EDIT Help
Area Discussion for - Charleston, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kchs 211342|
area forecast discussion
national weather service charleston sc
942 am edt Fri sep 21 2018
High pressure will prevail into early next week. A coastal
trough may impact the area towards the middle of next week,
followed by a cold front near the end of next week.
Near term until 6 pm this evening
For the late morning update, only minor changes to hourly
dewpoint grids have been made to account slightly higher
moisture levels nearest the coast. No other changes were needed
with the forecast remaining on track.
large, subtropical high pressure will buckle today as a well-
defined tutt low propagates west across the florida peninsula
and into the eastern gulf of mexico. The resulting lower mid-
level heights and deepening onshore flow induced by surface high
pressure propagating offshore of the north carolina outer banks
and virgina tidewater will yield a slightly cooler day with
highs from the lower 90s well inland to the lower-mid 80s at the
beaches. Rap soundings show a pronounced capping inversion
holding in place just below 500 hpa through the day, but a risk
for isolated showers moving inland along the georgia and far
southern south carolina coast from off the atlantic will linger
into the early afternoon, after which, the surface flow will
veer and become increasing divergent with the development of a
pronounced sea breeze circulation. Will carry slight chance pops
roughly along south of a glennville-savannah-hilton head line
with rain-free conditions elsewhere. A mention of tstms will not
be included given the largely stable conditions noted in
regional modified soundings.
Short term 6 pm this evening through Monday
Tonight: isolated showers will redevelop over the atlantic
overnight as the flow becomes increasing convergent along west
of the gulf stream. Low-level trajectories favor any activity
that makes a run for the beaches be directed to the mcintosh
county coast where slight chance pops will be highlighted.
Similar to this morning, patches of marine-based stratocumulus
will impact mainly the coastal counties after midnight. Farther
inland, some low stratus and patchy fog could develop just
before sunrise, especially across far interior southeast georgia
near the metter and millen areas. Lows will range from the mid-
upper 60s well inland to the upper 70s near 80 at the beaches
and downtown charleston.
Saturday: the mid-levels will consist of strong high pressure just
off the southeast coast in the morning, with it's western periphery
stretching into the carolina's. The high is expected to slowly
weaken and shift to the east through the day and into the night,
causing heights to lower across our area. At the surface, broad high
pressure will generally be centered over eastern nc. The high will
slowly move offshore during the day as a cold front approaches from
the north. The front is expected to become stationary overnight,
allowing the high to hover offshore. Pwats will start out near 1"
across most of our area in the morning, then increase through the
day and into the night. A sharp gradient sets up with pwats ranging
from ~1.25 over berkeley county to almost 2" across mcintosh county
late at night. The pops reflect this trend. Expect slight chance
values to our south, gradually creeping north in time. No thunder is
expected. Our sc locations should stay dry because of dry mid- level
air and capping. Temperatures will be a few degrees above normal.
Sunday: the mid-levels will consist of high pressure off the
southeast coast in the morning, with it's western periphery barely
stretching into our area. The high will continue it slowly weakening
trend and shift to the east through the day and into the first part
of the night, causing heights to lower. But it does appear to
strengthen slightly late at night, causing heights to rise back to
where they were at the beginning of the day. At the surface, high
pressure will be offshore in the morning while a stationary front is
to our north. The front may try to meander across nc by the
overnight, but it will stay away our area. A sharp pwat gradient
will be in place during the morning, with values ranging from ~1.25
over berkeley county to almost 2" across mcintosh county. The higher
values will be ushered to the north, so most locations may be around
2" by the overnight hours. The highest pops are south of the|
savannah river. It'll be hard to get any thunderstorms due to the
lack of instability. Again, most of our sc locations should stay dry
because of dry mid-level air and capping. Temperatures will be a few
degrees above normal.
Monday: the mid-levels will consist of high pressure off the
southeast coast in the morning, with it's western periphery barely
stretching into our area. Additionally, a ridge will be over the
great lakes region. The ridge will move eastward through the day and
into the night. This will help to strengthen the high off the coast
and allow heights to rise over our area. At the surface, a coastal
trough is forecasted to slowly approach from the east. Meanwhile, a
stationary front will remain spread across nc. Pwats will be over
2". Models show decent precipitation coverage, so we have above
normal pops. This will also allow temperatures lower to near normal
values for a change.
Long term Monday night through Thursday
Showers are expected throughout the short term due to plenty of
moisture across the region and several features providing lift. A
coastal trough is forecasted to slowly approach from the east Monday
night while a stationary front is to our north. By Tuesday the
coastal trough is forecasted to weaken while it moves overhead or
just to our north. At that time, the stationary front to our north
will transition into a warm front and move northwards while a cold
front slowly approaches our area from the far west. Wednesday the
cold front will continue to slowly approach. Thursday the cold front
is forecasted to start moving into our area, then possibly stall out
in our area.
Aviation 14z Friday through Tuesday
Vfr. Isolated showers may be around ksav later this morning, but
intensities should remain quite light. No meaningful impacts are
expected and tstms should not occur given the strong capping
inversion noted on rap soundings.
Extended aviation outlook: brief flight restrictions are
possible in showers and or thunderstorms Monday and Tuesday.
Today: east to northeast winds will veer more solidly east
through the day as a sea breeze circulation develops and moves
inland. A locally pinched gradient could support winds as high
as 15-20 kt along the georgia legs this afternoon with 10-15 kt
over the south carolina legs. The frequent gust potential looks
to remain below 25 kt, so a small craft advisory will not be
posted. Seas will average 2-4 ft.
Tonight: a modest easterly flow regime will hold through the
night with winds 10-15 kt diminishing to 5-10 kt late. Seas will
average 2-4 ft, except over the charleston county waters where
seas will subside to 1-2 ft.
Friday through Tuesday: high pressure will prevail just to our
north this weekend, leading to tranquil marine conditions. A
coastal trough is forecasted to slowly approach from the east
Monday. The pressure gradient ahead of this feature will
increase, causing winds seas to trend upwards. However, no small
craft advisories are expected. This feature is forecasted to
weaken while it moves overhead or just to our north on Tuesday.
At that time, winds seas are forecasted to trend downward.
Chs watches warnings advisories
Weather Reporting StationsEDIT (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|
|ACXS1 - ACE Basin Reserve, SC||25 mi||71 min||NE 4.1||83°F||1023 hPa||74°F|
|FPKG1 - 8670870 - Fort Pulaski, GA||26 mi||44 min||79°F||83°F||1022.8 hPa|
|41033||27 mi||48 min||NE 9.7 G 16||81°F||84°F||1022 hPa|
|FBIS1 - Folly Island, SC||56 mi||56 min||ENE 14 G 16||81°F||1023.4 hPa (+1.3)||68°F|
Wind History for Fort Pulaski, GA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Beaufort, Marine Corps Air Station, SC||10 mi||2 hrs||NE 4||10.00 mi||Mostly Cloudy||80°F||75°F||85%||1022.4 hPa|
|Beaufort County Airport, SC||14 mi||2 hrs||NNE 6||7.00 mi||Partly Cloudy||77°F||73°F||89%||1022.3 hPa|
|Hilton Head Island, Hilton Head Airport, SC||17 mi||2.1 hrs||N 10||10.00 mi||Mostly Cloudy||79°F||75°F||89%||1022.3 hPa|
Wind History from NBC (wind in knots)
|1 day ago||N||N||N||NW||NW||NW||NW||N||N||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NW||N||N||N|
|2 days ago||NW||W||W||SW||W||W||S||S||S||S||S||SW||SW||Calm||SW||Calm||Calm||Calm||Calm||N||Calm||N||NE |
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Wind Forecast for Charleston, SC (11,2,3,4)(on/off)  Help
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