Monday, December11, 2017

Marine Weather and Tides
Apex, NC

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 7:14AMSunset 5:03PM Monday December 11, 2017 4:12 AM EST (09:12 UTC) Moonrise 12:54AMMoonset 1:27PM Illumination 46% Phase: Third Quarter Moon; Moon at 23 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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7 Day Forecast for Marine Location Near Apex, NC
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location: 35.74, -78.86     debug

Area Discussion for - Raleigh, NC
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Fxus62 krah 110810
area forecast discussion
national weather service raleigh nc
310 am est Mon dec 11 2017

High pressure will extend over the gulf of mexico and southeast
states today through tonight. A dry cold front will cross north
carolina Tuesday, ushering in even colder air for mid week.

Near term today through tonight
As of 240 am Monday...

calls to counties in the NW part of the forecast area, where some
snow lingered on grassy areas, reveals that the roads dried out
considerably with the sunshine and breeze yesterday. While some
isolated icy spots likely remain this morning, widespread travel
problems are not anticipated, so a black ice advisory will not be

Within a stable column featuring fast wnw flow, the passage of a
band of elevated moisture aloft -- along a 700 mb trough axis now
crossing the area -- has kicked off some orographically enhanced mid
clouds over the N piedmont early this morning. Once this moisture
band passes to our east closer to daybreak, we should see these
clouds dwindle, leaving generally sunny skies today. Surface high
pressure will continue to span the gulf of mexico and fl, with ssw
to SW surface winds over nc. Latest model runs show thicknesses just
a bit below normal this morning but rising nicely through the day
within warm air advection, although cooler air may hang in longer
across the far northern cwa. Expect highs from the upper 40s N to
the mid 50s s. Our attention then turns to the potent mid level
clipper diving SE over the upper midwest this morning. This wave,
and its accompanying surface cold front, will drop SE then E into
the mid miss valley and ohio valley through tonight. As it
approaches, we're likely to see increasing mid clouds late this
afternoon through tonight, especially across the NW and n, with weak
moist upglide noted on the 310k surface. Improving low level
moisture, especially over the NW cwa, may induce patchy stratus as
well overnight. The trend to partly to mostly cloudy skies and the
light SW breeze holding up overnight should temper cooling somewhat,
yielding lows of 30-36, not far from normal but much milder than the
last couple of nights. -gih

Short term Tuesday through Tuesday night
As of 310 am Monday...

the upper level shear axis and corresponding dry surface cold front
will traverse the area Tuesday, arriving in the mid morning w, and
shifting east of the area during the mid afternoon. Skies should
remain partly to mostly cloudy through the morning, with a gradual
improving trend to fair to partly cloudy skies in the afternoon,
with a combination of thin mid and high clouds along with flat CU as
moisture is trapped near the top of an increasing boundary layer
mixed depth. The cooler air mass will be building in from the west,
such that it appears that the mountains will initially block the
coldest air, and we should still reach highs from the upper 40s nw
to the mid 50s se, although a stout breeze with frequent gusts
around 20 kts will make it feel chillier, especially late in the day
as the dewpoints plummet. While the initial cold front will be
moving to our east by mid afternoon, the more prominent cold dry air
surge will arrive late Tue afternoon through the evening, as a
strong vorticity MAX dives through the trough base across nc, with
the dynamic trop dropping to around 650 mb. Some enhanced cloudiness
and perhaps a burst of stronger wind gusts may accompany this trough
passage. Otherwise, skies will clear out Tue night, and temps are
expected to bottom out in the 20-25 range. These readings with a
steady NW breeze will bring the wind chill down into the low teens
over much of the area. -gih

Long term Wednesday through Sunday
As of 230 am Sunday...

the quieter weather pattern continues mid week, as general troughing
in the east gives way to a more zonal pattern toward the end of the
period. Wednesday looks to be the coldest day across central north
carolina, with afternoon highs failing to reach the 40 degree mark
under a brisk northwest wind. Southerly to southwesterly flow
returns early Thursday, allowing a brief warmup to more seasonable
temperatures to take place. Around this same time, an area of low
pressure looks to develop off of the carolinas, introducing shower
chances into the forecast Friday afternoon and evening. Model
differences take hold at this point, with a much wetter and more
amplified GFS model introducing an additional wave or two of
precipitation to the region before the end of the weekend, while a
much drier ECMWF keeps us under high pressure. For now, have limited
shower activity at the end of the period until better consensus is

Aviation 06z Monday through Friday
As of 1240 am Monday...

vfr conditions are a near certainty for the next 24 hours, as a
surface high pressure ridge extends into the area from the wsw.

Vsbys will be unrestricted, with no cigs. Surface winds will be
light, under 8 kts, from the w, shifting to SW then S late today
into tonight.

Looking beyond 06z tue: there is a low-confidence chance of sub-vfr
conditions at gso int early Tue morning (08z-12z) with increasing
low level moisture ahead of the approaching dry cold front. Winds
will shift back to northwesterly after frontal passage tue.

Otherwise,VFR conditions will dominate through at least Thu night.

Sub-vfr conditions are possible with rain chances increasing fri
as an upper trough approaches. -gih

Rah watches warnings advisories

Synopsis... Hartfield
near term... Hartfield
short term... Hartfield
long term... Jjm
aviation... Hartfield

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Raleigh / Durham, Raleigh-Durham International Airport, NC11 mi22 minSW 310.00 miFair30°F25°F82%1020 hPa
Sanford, Sanford-Lee County Regional Airport, NC17 mi23 minN 010.00 miFair23°F21°F96%1020 hPa
Chapel Hill, Williams Airport, NC18 mi17 minWNW 310.00 miFair29°F25°F85%1019.8 hPa

Wind History from RDU (wind in knots)
Last 24hrW4W5W5W34W8W11
1 day agoN6N7N6N5N4N7NE8N844N3CalmW4SW4SW6W6W7W3SW5SW4W5W5W7W5
2 days agoS3W4N3CalmNE3NE55NE7N8

Tide / Current Tables for Bannermans Branch, Northeast River, North Carolina
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Bannermans Branch
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Mon -- 12:49 AM EST     Moonrise
Mon -- 04:27 AM EST     -0.04 feet Low Tide
Mon -- 07:08 AM EST     Sunrise
Mon -- 10:04 AM EST     1.31 feet High Tide
Mon -- 01:22 PM EST     Moonset
Mon -- 04:45 PM EST     -0.01 feet Low Tide
Mon -- 05:00 PM EST     Sunset
Mon -- 10:22 PM EST     1.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Mid-Atlantic    EDIT

Wind Forecast for Raleigh, NC (4,6,7,8)
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Ground Weather Radar Station Raleigh/Durham, NC
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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.