Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:53AM||Sunset 5:11PM||Tuesday November 21, 2017 7:09 AM EST (12:09 UTC)||Moonrise 9:24AM||Moonset 7:52PM||Illumination 8%|
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|AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 437 Am Est Tue Nov 21 2017 |
Today..E winds 10 kt. Seas 2 to 3 ft. A slight chance of showers this afternoon.
Tonight..E winds 10 kt, becoming W after midnight. Seas 3 ft, then 2 to 4 ft after midnight. A chance of showers.
Wed..N winds 10 to 15 kt. Seas 2 to 4 ft, building to 3 to 5 ft in the afternoon.
Wed night..NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 3 to 6 ft. A slight chance of rain.
Thu..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 6 ft. A chance of rain.
Thu night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 6 ft.
Fri..NE winds 10 to 15 kt, becoming N 10 kt. Seas 3 to 5 ft, subsiding to 2 to 4 ft.
Sat..W winds 10 kt, increasing to 10 to 15 kt. Seas 2 to 4 ft.
|AMZ200 437 Am Est Tue Nov 21 2017 |
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A coastal trough just off the carolina coasts and an approaching cold front from the northwest will combine to produce light pcpn late this afternoon thru tonight. High pressure will follow and slowly build in from the west Wednesday thru Friday. At the same time, low pressure will pass just south and east of the area Wed night thru Thu with stratiform rains and embedded heavier showers possible along with sca conditions possible. A strong cold front will approach from the west during Sat and will sweep across the local waters to well offshore by late Sat night. Strong, dry and cold canadian high pressure will follow Sunday thru early next week.
7 Day Forecast for Marine Location Near Garden City, SCHourly EDIT Help
Area Discussion for - Wilmington, NC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kilm 211119|
area forecast discussion
national weather service wilmington nc
621 am est Tue nov 21 2017
A coastal trough just off the carolina coasts and an approaching
cold front from the northwest will combine to produce light
pcpn late this afternoon thru tonight... With the coastal areas
seeing the best shot of seeing measurable rainfall. High
pressure will follow and slowly build in from the west Wednesday
thru Friday. At the same time, low pressure will pass just
south and east of the area Wed night thru Thu with the immediate
coast again seeing the best chance for rainfall. A strong cold
front will approach from the west during Sat and will sweep
across the forecast area and off the coast to well offshore by
late Sat night. Strong, dry and cold canadian high pressure will
follow Sunday thru early next week.
Near term through tonight
As of 300 am Tuesday... Yet another cold night ongoing across
the area, but with the growing season ended in most of the cwa,
no frost freeze products are in effect or needed. Temps will
continue to fall slowly overnight, but should level off in the
few hours before dawn as high level cloudiness increases from
Big story today will be the development of a coastal trough
currently beginning to sharpen offshore. This is noted by a
weakness in the pressure field, as well as slowly increasing
low mid level cloudiness advecting NW just offshore. This 12
utc guidance has jogged eastward. I did trend the forecast in
feature will strengthen and try to advect westward as the
surface high across eastern nc retreats to the east, but will
likely remain just offshore through tonight. As this coastal
trough sharpens, SW flow aloft will increase and pieces of
vorticity energy will lift overhead downstream of a trough
digging through the ms vly. This causes slowly increasing
isentropic lift, as well spawning a weak area of low pressure
which will move NE offshore tonight. The NAM is an outlier being
aggressive with saturation and rainfall today, while there is
good agreement between much of the other guidance. It takes a
long time for the mid-levels to saturate, but do expect light
rain showers to develop from SW to NE this evening and tonight,
with the heaviest rain likely along the immediate coast. Qpf
should be light, but over a tenth of an inch is possible across
the grand strand and into CAPE fear. As the surface low pulls
away tonight, a cold front will cross the carolinas to be
offshore by Wednesday morning, causing rapid drying and bringing
an end to any rainfall chances.
Highs today will climb well into the 60s, but have forecast
slightly below MOS numbers to account for cloud cover and
onshore flow off cool ocean waters. Despite the FROPA overnight,
cold advection is weak and lags, so much warmer mins are
forecast for tonight, 12 utc guidance has jogged eastward. I did
trend the forecast in falling only into the upper 40s NW of
i-95, low 50s near the coast.
Short term Wednesday through Thursday night
As of 330 am Tuesday... First thing Wednesday morning, weak low
pressure accelerating ene, will be pulling away from the fa
taking any patchy pcpn and cloudiness with it. A coastal trof
along the immediate coast, will get pulled back over the atl
waters during the morning. A cold front will drop from the nw,
and sweep across the fa by midday and off carolina coasts before
stalling offshore and parallel to the coastline Wed night.
Will observe partial clearing during Wed aftn and evening as
weak CAA occurs via partial thicknesses schemes ie. 1000-850mb
along with 850mb temps dropping. MAX temps will run in the mid
60s slightly cooler than MOS guidance but normal for this time
of the year. Min temps Wed night will also run about normal with
lows in the upper 30s to low 40s.
For Thu thru Thu night, models are defying unity with respect to
the final wx outcome of this time period. This is in reference
to a northern stream 5h S W trof that drops to the SE states
during Thu and progresses eastward Thu night. Sfc low pressure
will develop along the stalled front offshore from sc late thu
and accelerates to the ene Thu night, pulling away from the ilm
cwa. The european and to a degree the NAM are both drier than
the GFS fcst. This likely due to a less amplified or a flatter 5h
s W trof when both compared to the gfs. Will stay closer 12
utc guidance has jogged eastward. I did trend the forecast into a
dry bias, where the sfc low with best pops and QPF staying off
the ilm CWA coast. Will still exhibit low chance pops, mainly
well east of the i-95 corridor to the immediate coast. By
daybreak fri, any pcpn and cloudiness across the fa will be
accelerating off to the ene, away from the fa. For MAX temps
thu, will see widespread 50s via european MOS due to clouds and
low chance pcpn. On a side note, the wetter GFS mos guidance
indicates upper 40s for Thu highs well inland, ie. Along and
west of the i-95 corridor. Friday morning lows will exhibit|
climo norms, with upper 30s to near 40 covering it.
Long term Friday through Monday
As of 245 pm Monday... The extended forecast will be mostly
influenced by an almost standing wave trough across the eastern
third of the conus. Ridging will remain focused across the four
corners region. There remains some indication of a couple of
systems moving across the baroclinic zone to the east but the
12 utc guidance has jogged eastward. I did trend the forecast
in the early periods a little drier so its essentially a dry
forecast throughout. Overall temperatures will run a little
below normal starting out on the cooler side of climatology
with a brief warmup for the weekend. This will be followed by
another cold shot early next week.
Aviation 12z Tuesday through Saturday
As of 12z... Mainly jet cirrus today. A developing low pressure
system near florida will track up the eastern seaboard this evening,
bringing a chance for rain mainly at the coastal terminals. After
the low passes to the northeast, winds will swing around to
northwest, with a brief period of ifr ceilings vis expected.
Conditions should improve after daybreak on Wednesday.
Extended outlook... MVFR conditions may develop in low clouds
and light rain early Wednesday morning,.VFR Thursday. MVFR to
ifr conditions are possible late Friday into Saturday in low
clouds and rain.
Near term through tonight ...
as of 300 am Tuesday... Light E NE winds this morning will
gradually transition to E SE as a coastal trough sharpens and
tries to lift NW towards the coast. Do not expect this feature
to make it onshore, but it will cause the subtle wind direction
change through this evening. The gradient will remain weak, so
wind speeds will be around 10 kts regardless of direction.
Tonight, a wave of low pressure offshore will pull the trough
back to the east with winds becoming sw, followed by the rapid
passage of a cold front by Wednesday morning shifting winds to
the nw. The strongest winds are expected post-fropa, reaching
10-15 kts at that time. Despite these light winds, seas will
gradually rise through tonight as a SE swell around the offshore
high pressure begins to amplify. Seas this morning are just 1-2
ft, and although the wind will do little to increase the seas,
an 7-8 sec SE swell will grow to 4-5 ft, pushing wave heights to
3-4 ft tonight.
Short term Wednesday through Thursday night ...
as of 330 am Tuesday... Wednesday will be highlighted with caa
under northerly winds in the morning veering to the NE in the
aftn and night. Wind speeds will run 10 to 20 kt Wed into wed
night as CAA and a tightened sfc pg contribute to the winds.
With significant seas building to 3 to possibly as high as 6 ft
during Wed night into thu. Majority of the seas will come from
short period, 5 to 6 second wind waves. For Thu thru Thu night,
depending where the sfc low develops and intensifies relative to
the ilm coastal waters, will determine both winds and locally
produced seas. GFS again wants to intensify a low that is just
short of a gale late thu. Will follow this trend but keep the
low further offshore along with the best sfc pg. Will definitely
see scec and possible SCA conditions Thu into Thu night and will
highlight in the hazardous wx outlook. Sig. Seas will hold in
the 3 to 6 ft range Thu into Thu night with a few 7 footers
Long term Friday through Saturday ...
as of 245 pm Monday... Northeast winds of 10-15 knots will
prevail through the first two days of the extended marine
forecast. There may be a few hours of 15-20 early on but overall
10-15 should do it. By Saturday a modest southwest flow will
develop ahead of another cold front which should move across
later in the weekend. Significant seas will trend downward from
3-5 feet early to 2-4 and possibly 1-3 feet by Saturday.
Ilm watches warnings advisories
near term... Jdw
short term... Dch
long term... Shk
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|
|MROS1 - 8661070 - Springmaid Pier, SC||7 mi||52 min||1022.3 hPa|
|NIWS1 - North Inlet-Winyah Bay Reserve, SC||19 mi||85 min||NNE 5.1||49°F||1023 hPa||45°F|
|41024 - Sunset Nearshore (SUN 2)||33 mi||62 min||NE 7.8 G 9.7||51°F||61°F||1022.9 hPa|
Wind History for Springmaid Pier, SC(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Myrtle Beach Air Force Base, SC||8 mi||74 min||N 7||10.00 mi||Fair||44°F||41°F||89%||1023.6 hPa|
|Conway Horry County Airport, SC||18 mi||75 min||N 0||10.00 mi||Fair||34°F||33°F||100%||1023.7 hPa|
|North Myrtle Beach Grand Strand Airport, SC||22 mi||77 min||NNE 4||10.00 mi||Fair||41°F||39°F||96%||1023.2 hPa|
Wind History from MYR (wind in knots)
|1 day ago||W||W||W||NW|
|2 days ago||Calm||SE||S||S||SE||SE||S||S||S||S||S||SW||S||SW||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Garden City Pier (ocean) |
Click for Map
Tue -- 02:40 AM EST 0.46 feet Low Tide
Tue -- 06:53 AM EST Sunrise
Tue -- 08:57 AM EST 5.58 feet High Tide
Tue -- 09:23 AM EST Moonrise
Tue -- 03:18 PM EST 0.55 feet Low Tide
Tue -- 05:10 PM EST Sunset
Tue -- 07:51 PM EST Moonset
Tue -- 09:06 PM EST 4.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Little Bull Creek entrance |
Click for Map
Tue -- 12:57 AM EST 2.34 feet High Tide
Tue -- 06:54 AM EST Sunrise
Tue -- 07:46 AM EST 0.42 feet Low Tide
Tue -- 09:24 AM EST Moonrise
Tue -- 01:29 PM EST 2.69 feet High Tide
Tue -- 05:10 PM EST Sunset
Tue -- 07:52 PM EST Moonset
Tue -- 08:32 PM EST 0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southeast EDIT
Wind Forecast for Wilmington, NC (7,2,3,4)(on/off)  Help
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