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 6:18AM||Sunset 8:25PM||Thursday July 20, 2017 10:30 PM EDT (02:30 UTC)||Moonrise 2:29AM||Moonset 4:44PM||Illumination 7%|
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|AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 852 Pm Edt Thu Jul 20 2017 |
Overnight..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 ft.
Fri night..SW winds 10 to 15 kt with gusts up to 20 kt early. Seas 2 to 3 ft.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..SW winds 10 to 15 kt...increasing to 15 to 20 kt after midnight. Seas 3 ft.
Sun..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 ft...then 2 to 4 ft in the afternoon.
Sun night..SW winds 15 to 20 kt...diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. A chance of showers and tstms.
Mon..SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers and tstms.
Tue..SW winds 10 to 15 kt...diminishing to 10 kt. Seas 3 to 5 ft... Subsiding to 2 to 3 ft. Showers and tstms likely. Winds and seas higher in and near tstms.
|AMZ200 852 Pm Edt Thu Jul 20 2017 |
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. High pressure will build across the waters and persist thru the upcoming weekend. A cool front will drop southeastward Mon and stall just inland and north of the local waters Tue.
7 Day Forecast for Marine Location Near Briarcliffe Acres, SCHourly EDIT Help
Area Discussion for - Wilmington, NC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kilm 210129|
area forecast discussion
national weather service wilmington nc
929 pm edt Thu jul 20 2017
Showers and thunderstorms will be isolated in the days ahead,
as an upper ridge builds from the west. The ridge will bring hot
and humid conditions through the weekend. Rain chances will
increase early next week as a surface trough deepens inland.
Near term through Friday
As of 900 pm Thursday... Have removed all pops this evening
and overnight and continued this trend thru daylight Friday.
Various model soundings indicate mild temps, relatively
speaking, at the 500 mb level. Model soundings indicate below
-4 degrees celsius. This will likely keep a lid on diurnally
driven convection overnight thru Friday and have adjusted pops
downward as a result. Cloud coverage overnight thru Friday
has also been reduced with sea breeze induced CU and moderate
cu possible on fri. Did not include any fog for the overnight
although if winds do go calm, portions of the fa could see
patchy ground fog. This more of an aviation concern.
Any fog that occurs should burn off by 8-9 am leaving
possible patchy haze across the fa until winds pick up to
5 kt or greater. Only tweaked the overnight temps by a degree
or 2, nothing really noteworthy.
Previous... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .
As of 3 pm Thursday... NVA and height rises associated by the
retreating upper low working together with ambient subsidence
associated with offshore convection to keep the much of the
coastal plain not only rain-free but also hampering cu
development. The area is shaping up for a muggy night with a
continuation of light winds. Any patches of fog will only be of
aviation concern as visibilities below 5sm do not appear in the
cards. Tomorrow differs from today in that the aforementioned
sources of downward vertical motion will be no more. With higher
temps aloft and weak surface warm advection afternoon temps
will soar into the mid 90s coast and upper 90s inland. There was
some talk of a heat advisory but boundary layer hydrolapse
rates seem to call for dewpoints that will fall during peak
heating and preclude the 105f apparent temperatures needed
across most of the area. This idea may be revisited by the
evening and overnight crew however as the WRF in particular is
less enamored with the idea.
Short term Friday night through Saturday night
As of 3 pm Thursday... Deep layer high pressure will dominate
the conditions through the short term period. Mid level moisture
will be lacking and most of the guidance is keeping the area
dry through the period. Temperatures will be several degrees
above normal most notably with Saturdays highs with upper 90s in
the most northwest inland zones. We will once again be on the
cusp of a heat advisory depending on the dry air mixing down in
the afternoon which may modify the apparent temperature just
enough to preclude the 105 clip needed for three hours.
Overnight lows remain steamy in the middle to upper 70s.
Long term Sunday through Thursday
As of 3 pm Thursday... Long term will be marked by gradually
decreasing temperatures and increasing chances for precipitation
as ridging at the surface and aloft breaks down and a cold front
approaches and then moves across the eastern carolinas. A
consensus of guidance has the front stalling in our vicinity by
late Tuesday or Wednesday, where it will linger into Thursday.
Above normal temperatures Sunday and Monday will drop back down
to or below climo for the remainder of the long term. Tuesday
looks to be the best day for convection, with deep moisture in
place in advance of the impending front.
Aviation 01z Friday through Tuesday
As of 00z Friday... Looking at mainlyVFR conditions this fcst
package. The only exception will be from 07z-12z at which time
vsby may reduce to 3sm to 5sm in br due to calm winds. South to
sw winds at 5 to 10 kt will diminish to sw-wsw at 4 kt or less
after midnight. Models do not show any LLJ for Fri early morning
and therefore have indicated tempo calm winds with MVFR vsby from
br. Progs indicate the mid-levels ie. 500mb will warm to -3 to
-4 degrees c on fri. This relatively mild air aloft will
keep a lid on thunderstorm development with diurnally driven cu
possibly reaching moderate CU stage before flattening out.|
Could see 4k to 5k sct to possibly bkn cu. Did not even include
vcts or any prob30 groups for thunder. The sea breeze
circulation will start early with the myrtles seeing southerly
10 kt winds by midday becoming gusty in the 10-15kt g20kt. The
ilm terminal will see the sea breeze push thru around 19z with
winds slightly lower both sustained and gusts when compared to
the myrtles. The inland terminals will see wsw 4 to 8 kt from
13z thru 22z backing to the s-ssw at 5 to 10 kt due to the
aggressive sea breeze boundary pushing well inland.
Extended outlook... MainlyVFR with possible morning MVFR from
br. Brief MVFR ifr possible in scattered showers and tstorms
mon and Tue due to a slowly approaching cold front from the nw.
Near term through tonight ...
as of 900 pm Thursday... Ssw-sw winds staying active in the
10 kt to occasionally 15 kt for the overnight period based
on latest obs and trends and model guidance. Have indicated
gusts to 20 kt, especially near shore, during Fri aftn and
evening due to an active and inland progressive sea breeze.
Significant seas will run 2 to 3 ft tonight and around 3 ft
during Friday. Tonights seas will primarily be dominated by
a 1 to 2 foot, 7 to 8 second period pseudo ground swell
from the ese. Of note, an underlying 1 foot ese longer period
ground swell at 14 to 15 second periods, is showing up across
the nc coastal and offshore buoys, mainly north of CAPE fear.
It may affect the local waters from surf city to CAPE fear,
with significant seas increased to a solid 3 feet overnight
into daylight fri.
Previous... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .
As of 3 pm Thursday... Winds have been light and somewhat
variable today but a southwesterly direction will gradually
come to dominate through the period. The reason being the
pressure gradient-disturbing upper low will
retrograde adequately for the atlantic high to re-assert
itself. Spectral plots show twin peaks of wave power at both 8
and 13-14 seconds, the latter being a ese swell that will
persist. As the wind picks up by up to a category the dominant
period will shorten some but overall wave heights will not
Short term Friday through Saturday night ...
as of 3 pm Thursday... Bermuda high pressure will keep southwest
winds flowing across the coastal waters through the period.
Some daytime increase in winds are expected with a decent sea
breeze Saturday as it will be one of the warmest days of the
year. Also the inland through will be enhanced by the heat which
in turn will strengthen the low level jet overnight Saturday.
Expect speeds to increase from the standard 10-15 knot range to
15-20 for a few hours. Significant seas will be 2-4 feet but a
few five footers may develop overnight depending on just how
much winds increase.
Long term Sunday through Tuesday ...
as of 3 pm Thursday... Circulation around high pressure over the
western atlantic will keep winds from the SW through the period.
An approaching cold front may briefly tighten the gradient
enough to warrant exercise caution headlines or a small craft
advisory late on Monday, but confidence on this is low at this
Ilm watches warnings advisories
near term... Dch mbb
short term... Shk
long term... Rek
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||9 mi||55 min||1015.9 hPa|
|41024 - Sunset Nearshore (SUN 2)||18 mi||83 min||SW 9.7 G 12||81°F||80°F||1016.2 hPa|
|SSBN7||19 mi||151 min||1 ft|
|NIWS1 - North Inlet-Winyah Bay Reserve, SC||35 mi||106 min||SW 8||82°F||1016 hPa||76°F|
|41108||43 mi||61 min||82°F||2 ft|
Wind History for Springmaid Pier, SC(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|North Myrtle Beach Grand Strand Airport, SC||6 mi||38 min||SSW 10||10.00 mi||Fair||81°F||75°F||85%||1016.8 hPa|
|Myrtle Beach Air Force Base, SC||8 mi||46 min||SW 7||10.00 mi||Fair||82°F||75°F||79%||1016.9 hPa|
|Conway Horry County Airport, SC||17 mi||36 min||S 3||7.00 mi||Fair||79°F||73°F||84%||1016.9 hPa|
Wind History from CRE (wind in knots)
|1 day ago||SW||SW||SW||SW||W||NW||NW||NW||Calm||W||N||W||S||S||S||S||SW||S||S||Calm||W|
|2 days ago||S||S||S||Calm||Calm||Calm||Calm||SW||Calm||N||Calm||SW||S||S||S||S||S||S||S||S||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|North Myrtle Beach |
Click for Map
Thu -- 02:50 AM EDT 0.09 feet Low Tide
Thu -- 03:29 AM EDT Moonrise
Thu -- 06:19 AM EDT Sunrise
Thu -- 07:42 AM EDT 1.87 feet High Tide
Thu -- 02:56 PM EDT -0.61 feet Low Tide
Thu -- 05:44 PM EDT Moonset
Thu -- 08:21 PM EDT 2.34 feet High Tide
Thu -- 08:23 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Myrtle Beach Airport |
Click for Map
Thu -- 01:25 AM EDT 0.09 feet Low Tide
Thu -- 03:29 AM EDT Moonrise
Thu -- 06:18 AM EDT Sunrise
Thu -- 06:36 AM EDT 2.91 feet High Tide
Thu -- 01:31 PM EDT -0.61 feet Low Tide
Thu -- 05:43 PM EDT Moonset
Thu -- 07:15 PM EDT 3.64 feet High Tide
Thu -- 08:23 PM EDT Sunset
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 Mid-Atlantic EDIT
Wind Forecast for Wilmington, NC (22,6,7,8)(on/off)  Help
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