Wednesday, March29, 2017

Marine Weather and Tides
Apex, NC

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:03AMSunset 7:36PM Wednesday March 29, 2017 3:11 PM EDT (19:11 UTC) Moonrise 7:18AMMoonset 8:31PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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 291902
area forecast discussion
national weather service raleigh nc
302 pm edt Wed mar 29 2017

Weak high pressure will move over central nc today and remain in
control through Thursday before low pressure brings unsettled
weather to the area for Friday and Friday night.

Near term /through tonight/
As of 1250 pm Wednesday...

central nc will be under the influence of a very remote surface high
centered over northern ontario with building heights aloft as
shortwave ridging shifts overhead. Widespread stratus with ceilings
between 2 to 4kft, has overspread the area, as depicted by the hrrr
and nam, within the stable low-level nely flow. Expect these low
ceilings to lift and eventually scatter out into a stratocu layer.

High temperatures ranging from mid to upper 60s NE , to mid/upper
70s southwest.

It should start out mostly clear this evening, but an area of
expanding stratus, developing within the 925-850mb sely upslope flow
along the higher terrain, is expected to spread into the western and
possibly central piedmont between 06 to 12z. Lows ranging from the
mid 40s NE to mid 50s sw.

Short term /Thursday and Thursday night/
As of 405 am Wednesday...

Thursday will be quiet during the day as a meso-high develops over
the DELMARVA peninsula which will throw temperatures into question a
bit for Thursday afternoon. If flow remains southeasterly over the
area, we should see temps near 60 degrees across the north with
highs closer to 70s in the south. If flow remains more northeasterly
temps could come in quite a bit cooler, especially across the north.

By Thursday night, the first waves of precipitation associated with
an approaching low pressure system will begin to overspread at least
the western portions of the cwa, and perhaps everywhere by 12z
Friday. Diurnal timing should keep most of this activity limited to
convective showers as instability is non-existent. That being said,
model soundings show every strong veering with height and wind
profiles suggest bulk shear of 50 knots or so with a large heaping
pile of helicity in the lowest levels of the atmosphere. Will
certainly keep an eye on these details as they evolve. Lows Thursday
night mainly in the 50s.

Long term /Friday through Wednesday/
As of 300 pm Wednesday...

fri-fri night: the 12z gfs/ecmwf are in fairly close agreement
showing the upper low tracking ene through the oh valley during the
day Friday, progressing into western pa late Friday into Friday
night. However, differences in timing persist between the gfs/ecmwf,
and the 12z NAM (an outlier) shows the upper low tracking east
through ky into WV fri/fri night (much closer than the GFS or
ecmwf). Forecast confidence remains lower than normal, ESP given
uncertainty in the evolution of upstream convection across the deep
south thu/thu night in addition to uncertainty in the strength/
extent/evolution of the cad wedge expected to develop over central
nc on thu. Although confidence in precipitation chances remains
high, forecast specifics such as precip amounts, temperatures and
intensity/mode of convection remain relatively low. With the latest
guidance in mind, will indicate highs ranging from the mid 60s in
the triad to the mid 70s in the sandhills/se coastal plain. Expect
precipitation to end from sw-ne as early as late Friday aft/eve,
with skies clearing in the wake of a cold frontal passage Fri night.

Lows Sat morning will depend primarily upon FROPA timing, ranging
from the upper 40s/lower 50s (n/nw) to mid 50s (s/se). The 12z
gfs/ecmwf suggest a lower potential for severe weather given an
upper low track further to the north and a slightly faster
progression of the system. The 12z NAM would suggest a more robust
potential for severe weather due to the closer proximity of the
upper low and slightly slower progression of the system which would
result in favorable diurnal timing, as well. Uncertainty remains too
high to say much more w/regard to the severe weather potential.

Sat-sun night: expect dry conditions and a warming trend over the
weekend as a shortwave ridge builds east across the mid-atlantic and
carolinas. Expect highs in the lower/mid 70s Sat and mid 70s Sunday
as a shortwave ridge aloft tracks across the region from the west.

Mon-wed: expect increasing cloud cover during the day Monday and a
chance for convection Mon night through Tue as the next upper level
low /attendant sfc cyclone/ approach from the west. -vincent

Aviation /18z Wednesday through Monday/
As of 200 pm Wednesday...

24 hour TAF period: high pressure will wedge south into the area
tonight and into the day on Thursday. The stable low-level nely
flow has advected a shallow marine layer into the area, producing
ceilings between 3 to 4kft. Goes-r 16 visible imagery shows these
low-endVFR ceilings quickly morphing into a scattered to broken
stratocu deck.

There is medium confidence to high confidence that an area of MVFR
stratus will at kint and kgso, within the 925-850mb sely upslope
flow along the eastern slopes of the higher terrain. Though
confidence is not as high, ceilings at krdu, krwi and kfay are
expected to remainVFR, with the potential that krdu could be
on the eastern periphery of the sub-vfr ceilings. A strong mid-level
subsidence inversion over the area on Thursday will result in slow
lift/improvement of the stratus layer, with a high likelihood that
sub-vfr ceilings at kgso and kint could linger into the mid to late

Long term: a warm front associated with a low pressure system
tracking through the middle ms valley will bring the chance for
showers and thunderstorms Thursday night late Thursday night through
mid to late morning hours on Friday. High pressure withVFR
conditions should return Friday afternoon and will persist
through the weekend. The next storm system is expected to impact
the area on Monday.

Rah watches/warnings/advisories

Synopsis... Ellis
near term... Cbl
short term... Ellis
long term... Vincent
aviation... Cbl

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Raleigh / Durham, Raleigh-Durham International Airport, NC11 mi80 minNE 410.00 miMostly Cloudy69°F50°F51%1018.2 hPa
Sanford, Sanford-Lee County Regional Airport, NC17 mi81 minN 410.00 miPartly Cloudy69°F53°F58%1017.9 hPa
Chapel Hill, Williams Airport, NC18 mi75 minVar 310.00 miOvercast70°F53°F55%1018 hPa

Wind History from RDU (wind in knots)
Last 24hrW4W9
1 day agoSW10SW9S10S9S5S7S7S8S11SW10S8SW10SW11SW9SW12SW11SW7SW9SW7SW11SW10W9
2 days agoS12

Tide / Current Tables for Bannermans Branch, Northeast River, North Carolina
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Bannermans Branch
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Wed -- 04:49 AM EDT     1.63 feet High Tide
Wed -- 07:01 AM EDT     Sunrise
Wed -- 08:14 AM EDT     Moonrise
Wed -- 12:19 PM EDT     -0.09 feet Low Tide
Wed -- 05:22 PM EDT     1.52 feet High Tide
Wed -- 07:30 PM EDT     Sunset
Wed -- 09:25 PM EDT     Moonset
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 (15,3,4,5)
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Ground Weather Radar Station Raleigh/Durham, 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.