Sunday, November19, 2017

Marine Weather and Tides
Red Hill, SC

Version 3.4
What's New / NOTES
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 6:51AMSunset 5:11PM Sunday November 19, 2017 4:29 PM EST (21:29 UTC) Moonrise 7:42AMMoonset 6:22PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 315 Pm Est Sun Nov 19 2017
.small craft exercise caution in effect until 1 am est Monday...
Tonight..N winds 15 to 20 kt, becoming ne 10 to 15 kt late. Seas 3 to 5 ft.
Mon..NE winds 10 to 15 kt, becoming E 10 kt or less in the afternoon. Seas 2 to 3 ft.
Mon night..E winds 10 kt. Seas 1 to 2 ft.
Tue..SE winds 10 kt. Seas 1 to 2 ft, then 2 ft in the afternoon. A chance of rain.
Tue night..SE winds 10 kt, becoming ne after midnight. Seas 2 to 3 ft. A chance of rain.
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 with gusts up to 20 kt. Seas 3 to 5 ft.
Thu..NE winds 10 to 15 kt. Seas 3 to 5 ft, subsiding to 2 to 4 ft. A chance of rain.
Fri..N winds 10 to 15 kt. Seas 2 to 4 ft, subsiding to 2 to 3 ft.
AMZ200 315 Pm Est Sun Nov 19 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 in through much of the early week. A couple of systems moving offshore may affect the waters later in the week.

7 Day Forecast for Marine Location Near Red Hill, SC
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location: 33.75, -79.07     debug

Area Discussion for - Wilmington, NC
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Fxus62 kilm 192030
area forecast discussion
national weather service wilmington nc
330 pm est Sun nov 19 2017

High pressure will control area weather through Monday. A coastal
trough and approaching cold front may bring some showers late
Tuesday and Tuesday night. Low pressure is expected to develop in
the eastern gulf of mexico mid week and may bring unsettled weather
to the eastern carolinas Thursday and Friday as it moves northeast.

High pressure early next weekend will be followed by the passage of
a cold front next Sunday.

Near term through tonight
Surface high pressure will build in under a northwest flow aloft.

The airmass is once again just cold enough to cause some
frost freeze concerns as a good part of our area remains at least
officially in the growing season. It appears via guidance and some
residual low level mixing that any freeze conditions will be a
stretch. There is enough of a threat concern for frost especially
late when the winds diminish. Will go ahead and issue a frost
advisory for areas where mins are 35 degrees and under. This will
preclude most of the coastal areas. Overnight lows will general be
in the middle 30s. Highs Monday will be middle to upper 50s under
mostly sunny skies.

Short term Monday through Tuesday night
As of 300 pm Sunday... High pressure previously overhead takes on a
very west-east elongation Monday night bringing a light onshore flow
to coastal areas, especially sc. The ocean influence paired with the
radiational cooling inhibition could add a few degrees to the
seasonably cool nighttime lows. Neither should hold true over nw
zones and there may be a large than normal NW to SE gradient in low
temps, those areas ending up almost as cool as the previous night.

On Tuesday warm advection will both shoot highs back to climatology
if not a few degrees warmer but also yield increasing cloud cover
and some slowly increasing rain chances. These rain chances appear
to increase and shift from inland to the coast Tuesday night as the
waa interacts with stronger vorticity centers in the SW mid level
flow. The WAA and cloud cover will keep Tuesday night lows elevated
a good 10 degrees above climatology.

Long term Wednesday through Sunday
As of 300 pm Saturday... Lingering rain is possible early Wednesday as
an upper trough moves out and a cold front moves out to sea. Another
short wave trough could spawn low pressure development along the old
front off the southeast u.S. Coast. This will bring another chance
of rain to the area Wednesday night into Friday, though the exact
details of this scenario are still in doubt. Dry weather is expected
for the remainder of the long term but light showers are possible
with another frontal passage and vigorous upper trough on Sunday.

Temperatures will be near seasonal normals of mid 60s Wed before
falling back into the mid to upper 50s for Thu and fri. Slightly
warmer temperatures are expected Sat and Sun with highs in lower
60s. Mins temperatures Wednesday night will fall to the upper 30s to
lower 40s with higher numbers SE and along the immediate coast.

Temperatures in the mid 30s to around 40 are expected Thu night and
Friday night before rebounding to the mid to upper 40s Saturday

Aviation 18z Sunday through Friday
As of 18z... With the cold front now offshore, dry and stable air
is flooding across the eastern carolinas. Gustiness in this
northwest wind will continue another couple of hours near the
coast before settling down below 10 knots. Surface winds should
decrease further tonight withVFR conditions continuing.

Extended outlook...VFR conditions are expected Sunday through
Tuesday morning. MVFR conditions may develop in low clouds and
light rain Tuesday night through Wednesday morning, then MVFR
to ifr conditions are possible Thursday night into Friday in low
clouds, rain, and fog.

Near term through tonight ...

winds and seas on the way down this afternoon as although cold air
advection continues, the stronger low level wind fields were ahead
of the front that has long since passed. North to northwest winds of
15-20 knots will prevail most of the late afternoon hours and night.

On Monday surface high pressure settles over the area and winds
decrease dramatically, down to the single digits by late afternoon.

Seas are down to just over six feet at 41013 and I will wait til the
last minute but most likely cancel the small craft advisory just a
touch early and issue an exercise caution statement. Overall seas
will settle into a 2-4 foot range overnight and even less later

Short term Monday through Tuesday night ...

as of 300 pm Sunday... Things just about as quiet as they get for the
marine environment for most of the period. West-east elongated high
pressure to keep just a light onshore flow of just a few knots. A
weak coastal trough will develop on the periphery of the high later
Tuesday into Tuesday night veering flow to SE and adding a few knots
of wind speed, bumping the forecast up a category or more. Seas will
be following suit, showing a gradual growing trend.

Long term Wednesday through Friday ...

as of 300 pm Saturday... N to NE winds INVOF 15 kt are expected
through much of the period though a peak of 15 to 20 kt is possible
thu night into Friday. On the open waters, seas of 3 to 5 feet are
expected through the period. Depending on low pressure development
off the SE u.S. Coast, conditions in this period could be hazardous
and it is possible that winds and seas could exceed thresholds for
small craft advisories, 25 kt winds and or seas of 6 ft, during this

Ilm watches warnings advisories
Sc... Frost advisory from 4 am to 9 am est Monday for scz017-023-024-

Nc... None.

Marine... None.


near term... Shk
short term... mbb
long term... Ran
aviation... Tra

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 10 mi41 min 1009.6 hPa
NIWS1 - North Inlet-Winyah Bay Reserve, SC 28 mi104 min NW 8.9 65°F 1010 hPa38°F
41024 - Sunset Nearshore (SUN 2) 32 mi81 min NNW 16 G 19 63°F 62°F1008.8 hPa

Wind History for Springmaid Pier, SC
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Conway Horry County Airport, SC6 mi54 minNNW 57.00 miFair63°F32°F32%1010.5 hPa
Myrtle Beach Air Force Base, SC8 mi33 minNW 1110.00 miFair64°F30°F29%1010.8 hPa
North Myrtle Beach Grand Strand Airport, SC19 mi36 minNW 710.00 miFair64°F33°F32%1010.1 hPa

Wind History from HYW (wind in knots)
Last 24hrS7S6S5S7S8S8S9
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4S6S7S9S10S5SW6
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN6N4NE7NE10

Tide / Current Tables for Keysfield, Waccamaw River, South Carolina
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Sun -- 01:51 AM EST     1.51 feet High Tide
Sun -- 06:52 AM EST     Sunrise
Sun -- 07:40 AM EST     Moonrise
Sun -- 08:12 AM EST     0.18 feet Low Tide
Sun -- 02:25 PM EST     1.72 feet High Tide
Sun -- 05:10 PM EST     Sunset
Sun -- 06:22 PM EST     Moonset
Sun -- 08:52 PM EST     0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Conway, RR. bridge, Waccamaw River, South Carolina
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Sun -- 03:01 AM EST     1.35 feet High Tide
Sun -- 06:52 AM EST     Sunrise
Sun -- 07:40 AM EST     Moonrise
Sun -- 09:20 AM EST     0.15 feet Low Tide
Sun -- 03:35 PM EST     1.54 feet High Tide
Sun -- 05:10 PM EST     Sunset
Sun -- 06:22 PM EST     Moonset
Sun -- 10:00 PM EST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southeast    EDIT

Wind Forecast for Wilmington, NC (16,3,4,5)
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Ground Weather Radar Station Wilmington, NC
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weather_mapweather_map weather_map

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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 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 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.