Monday, March25, 2019 L-36.com


Marine Weather and Tides
Mount Pleasant, SC

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 7:15AMSunset 7:35PM Monday March 25, 2019 5:48 PM EDT (21:48 UTC) Moonrise 11:44PMMoonset 9:35AM Illumination 76% Phase: Waning Gibbous; Moon at 20 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
AMZ330 Charleston Harbor- 316 Pm Edt Mon Mar 25 2019
Tonight..SW winds 15 kt early, becoming W 5 to 10 kt. A chance of showers this evening, then showers likely with a slight chance of tstms after midnight.
Tue..N winds 10 to 15 kt, becoming ne 15 to 20 kt in the afternoon. Waves 1 to 2 ft. A chance of showers, mainly in the morning.
Tue night..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Wed..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Wed night..NE winds 10 to 15 kt.
Thu..NE winds 10 kt.
Thu night..NE winds 10 to 15 kt.
Fri..NE winds 10 kt.
Fri night..SE winds 5 to 10 kt.
Sat..S winds 5 to 10 kt.
Sat night..S winds 5 to 10 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 61 degrees.
AMZ300 316 Pm Edt Mon Mar 25 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will cross the region tonight followed by a strong cold front Tuesday. High pressure will then build in from the north and persist into Saturday. A cold front may affect the area late next weekend.


7 Day Forecast for Marine Location Near Mount Pleasant, SC
   Hourly   EDIT   Help
location: 32.93, -79.83     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 251954
afdchs
area forecast discussion
national weather service charleston sc
354 pm edt Mon mar 25 2019

Synopsis
Low pressure will cross the region tonight followed by a strong
cold front Tuesday. High pressure will then build in from the
north and persist into Saturday. A cold front may affect the
area late next weekend.

Near term until 6 am Tuesday morning
Through late afternoon: dry weather will continue as a warm
and breezy afternoon in progress across the region. Low level
moisture had mixed-out resulting in sparse cumulus formation
to the south of the savannah river while a strong resultant
sea breeze across charleston county resulting in some of the
higher wind gusts across the area.

Tonight: mid level shortwave energy across the upper gulf coast
and tennessee valley is forecast to shift through ga and the
carolinas overnight. After sunset, 500 mb height falls will
increase while upper difluence builds ahead of the left exit
region of the upper jet along the gulf coast. Across southern
ga, we note that the low level flow becomes west in the 00z-03z
time frame and this should disrupt any transport from the gulf
of mexico in the boundary layer. We have maintained likely pops
during the late evening hours mostly along and north of i-16
where the best combo of upper forcing and moisture bisect. The
12z NAM has a too-slow but otherwise plausible solution with
upstream convection perhaps loosely organizing across the sc
midlands in the early evening and shifting east across the area,
especially north of i-16 over much of southern sc. Since the
timing for the brunt of the convection is generally after dusk,
instability is forecast to quickly wane with ml capes less than
500 j kg and decreasing with time. The mid levels are fairly
impressive with mid level lapse rates greater than -6.5c and
parameters indicating the potential for tstms. We suspect if
storms do tend to cluster upstream, wind potential appears low
with increasing CIN and surface-based inversions. We continue to
mention slight chance thunder this evening in all zones but the
severe weather risk appears generally low.

After midnight: as the short wave aloft moves over the region,
a cold front will pass offshore late with lingering chances
for showers north of the savannah river toward daybreak.

Temps will mainly be in the 50s for the overnight across the
area. We cannot rule out some patchy fog across out northern
zones inland from charleston where a broad frontal trough
exists out ahead of Tuesday's backdoor cold front.

Short term 6 am Tuesday morning through Thursday
A backdoor cold front will drop into the area Tuesday morning from
the north and then continue to push south through the day. Moisture
is confined to the lower levels, so think any rain accompanying the
front will be fairly light. Accumulations should be a few hundredths
of an inch on average. Temperatures will be much cooler than Monday,
remaining in the 60s, except around 70 close to the altamaha. Lows
Tuesday night will range from upper 30s inland to low mid 40s at the
coast. Elevated winds will preclude any frost.

Cool high pressure will build in wake of the front, providing quiet
and dry conditions for Wednesday and Thursday. One forecast concern
is the potential for frost Wednesday night into early Thursday with
lows dropping into the mid upper 30s far inland. Winds will be
fairly light, and these conditions could support some patchy frost.

Long term Thursday night through Monday
Unseasonably warm and mostly dry through the period. A cold
front may move through late Sunday or Sunday night though it is
currently unclear how much precipitation will accompany it.

Aviation 19z Monday through Saturday
Vfr conditions are expected to prevail at kchs and ksav into
this evening. A cold front and associated band of showers and
isolated thunderstorms will approach the terminals late this
evening. We have tempo showers at both sites in the 03-07z time
period. Once the area of showers moves offshore, ceilings will
develop and spread into the terminals. Guidance indicates the
potential for ifr ceilings, but we have kept the forecast MVFR
for now starting around 09z. A backdoor cold front will drop
through the coastal corridor after sunrise on Tuesday,
increasing northeast winds are expected.

Extended aviation outlook: sub-vfr ceilings will improve Tuesday
afternoon evening.VFR expected thereafter.

Marine
Southwest flow will continue into the evening hours with stronger
flow beyond 20 nm off the charleston county coast. Speeds will mainly
be below 15 kt with seas 2 to 3 ft. A cold front will move off the
coast late tonight with wind directions veering offshore with
Tuesday through Saturday: marine conditions will deteriorate on
Tuesday behind a back door cold front that will drop through the
area. Small craft advisory conditions will develop across all
coastal waters by late afternoon. The charleston harbor could reach
criteria, however it appears marginal during the daytime hours. A
more sure bet would be late Tuesday night into Wednesday. Will hold
off on an advisory for now and reevaluate with next forecast cycle.

The period of strongest winds will be the 06z-18z Wednesday time
frame as 1000 mb geostrophic flow reaches 45-50 knots. A gale watch
has been hoisted for the outer ga waters where confidence is
highest. This may need to be expanded to at least some of the
nearshore zones eventually. Winds will begin to improve later
Wednesday, however it will take longer for seas to subside,
especially in the outer ga waters.

Rip currents: there will be an enhanced risk for rip currents mid-
week as elevated northeast winds and swell impact the beaches.

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 mid-week. While
astronomical factors do not favor tidal flooding, probabilistic
guidance depicts a low chance for minor salt water flooding,
mainly with the Wednesday morning high tide.

Equipment
The kclx radar remains out of service until further notice.

Additional parts are on order and the radar will be serviced
again on Tuesday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory from 2 pm Tuesday to 2 pm edt Thursday
for amz352.

Gale watch from Tuesday evening through Wednesday afternoon
for amz374.

Small craft advisory from 2 pm to 11 pm edt Tuesday for amz374.

Small craft advisory from 11 am Tuesday to 2 pm edt Thursday
for amz350.

Small craft advisory from 5 pm Tuesday to 2 pm edt Thursday
for amz354.

Near term...

short term... Etm
long term... Etm
aviation... Etm
marine... Etm
tides coastal flooding... Etm
equipment...



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
CHTS1 11 mi49 min 71°F 62°F1013.8 hPa (-2.7)
41029 - Capers Nearshore (CAP 2) 14 mi41 min SSW 12 G 16 64°F 61°F1014.1 hPa
FBIS1 - Folly Island, SC 17 mi49 min S 13 G 15 65°F 1014.4 hPa (-2.9)60°F
ACXS1 - ACE Basin Reserve, SC 42 mi64 min S 4.1 73°F 1014 hPa59°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 45 mi64 min SSW 15 73°F 1012 hPa58°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 49 mi39 min SW 16 G 19 71°F1014.9 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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
5
PM
Last
24hr
SE7
SE7
SE3
S3
S3
S6
S4
S4
S4
S3
SW4
SW6
SW5
G8
SW4
S3
SW4
SW7
G12
SW8
G14
SW13
G17
S8
G16
S9
G16
SW11
G18
SW11
G16
S13
G17
1 day
ago
S6
S8
SW4
S2
S2
--
S1
S1
--
--
NE2
NE2
NE2
NE1
E1
NE2
E7
E6
E4
E7
E7
E7
SE8
SE6
2 days
ago
W10
G14
W6
G13
SW5
G9
SW3
G6
SW4
W6
G11
W6
G10
W6
G10
W6
G11
W6
G11
NW8
G11
N5
G9
N9
G12
N8
N10
NE10
G13
NE10
G13
N7
G10
NE3
SE9
E9
SE8
SE9
S7
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Pleasant Regional-Faison Field, SC3 mi54 minS 13 G 2010.00 miFair72°F57°F61%1013.5 hPa
Charleston, Charleston Air Force Base, SC11 mi53 minS 1810.00 miMostly Cloudy and Breezy74°F54°F50%1013 hPa
Charleston Executive Airport, SC18 mi54 minS 14 G 2010.00 miFair72°F57°F61%1013.9 hPa
Moncks Corner Berkeley County, SC21 mi54 minSW 910.00 miPartly Cloudy77°F53°F44%1012.5 hPa

Wind History from CHS (wind in knots)
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
5
PM
Last 24hrS12S10SE6S4S5S5S4S4S3CalmCalmS6S5S5S6S6SW9SW12
G20
SW15
G21
S14
G25
SW21
G28
SW18
G28
SW16
G22
S18
1 day agoS6S9S6S4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE8S10
G14
SE11SE12
G17
SE9
G17
S7SE11
G20
S13
2 days agoW13W10W6SW7SW6W7W8W5W5W7N7N5NE4CalmNE4NE9E9NE11NE10NE843CalmCalm

Tide / Current Tables for Cainhoy, Wando River, South Carolina
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Cainhoy
Click for Map
Mon -- 12:51 AM EDT     6.96 feet High Tide
Mon -- 06:43 AM EDT     -0.08 feet Low Tide
Mon -- 07:16 AM EDT     Sunrise
Mon -- 10:34 AM EDT     Moonset
Mon -- 01:08 PM EDT     5.89 feet High Tide
Mon -- 06:53 PM EDT     0.05 feet Low Tide
Mon -- 07:34 PM EDT     Sunset
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
6.776.453.21.40.2-00.71.93.34.65.55.95.64.531.60.40.10.61.83.24.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Mon -- 12:33 AM EDT     -0.00 knots Slack
Mon -- 03:43 AM EDT     -2.70 knots Max Ebb
Mon -- 06:47 AM EDT     0.00 knots Slack
Mon -- 07:16 AM EDT     Sunrise
Mon -- 08:59 AM EDT     1.67 knots Max Flood
Mon -- 10:35 AM EDT     Moonset
Mon -- 12:39 PM EDT     -0.00 knots Slack
Mon -- 03:54 PM EDT     -2.07 knots Max Ebb
Mon -- 06:59 PM EDT     0.00 knots Slack
Mon -- 07:34 PM EDT     Sunset
Mon -- 09:26 PM EDT     1.55 knots Max Flood
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
0.6-0.5-1.7-2.5-2.7-2-10.31.31.71.41.10.5-0.3-1.2-1.8-2.1-1.7-0.900.91.51.51.3

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.