Tuesday, September26, 2017 L-36.com

Marine Weather and Tides
North Shore, VA

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 7:10AMSunset 7:10PM Tuesday September 26, 2017 7:07 AM EDT (11:07 UTC) Moonrise 12:06PMMoonset 10:26PM Illumination 33% Phase: Waxing Crescent; Moon at 6 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 North Shore, VA
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location: 37.06, -79.61     debug

Area Discussion for - Blacksburg, VA
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Fxus61 krnk 260812
area forecast discussion
national weather service blacksburg va
412 am edt Tue sep 26 2017

High pressure over the eastern united states will continue to
bring warm and dry weather to the region through midweek, while
hurricane maria stays just off the east coast. A dry cold front
will move through the appalachians and mid atlantic region on
Thursday, with much cooler weather for the end of the workweek
into the weekend.

Near term through tonight
As of 412 am edt Tuesday...

while generally dry and warm high pressure remains over the
appalachian region sandwiched in between a cold front across the
midwest and hurricane maria off the carolina coast, there has
been a slight increase in low level moisture with some areas of
stratocumulus over parts of the mountains, as well as moving in
across the piedmont with the gradient west of maria. Patchy fog
has begun developing early this morning where breaks in the
clouds are. Lower stratus just to the east of our area may sneak
in across parts of the piedmont today, but does not look like it
will make much progress before the heating of the day helps to
mix it and it breaks up or drifts back east. Meanwhile, cirrus
over the mountains should remain thin enough to allow daytime
cumulus to form with dew points in the 60s and afternoon
temperatures reaching into the 80s again except on higher
ridges. This is about 10 degrees or so above average for this
time of year. With some weak convergence along blue ridge and
over higher peaks on the west side of appalachians, would not be
totally surprised if an isolated shower were to form in one or
two spots, most likely along southern blue ridge or in SE wv
from flat top to WRN greenbrier co. Certainly not expecting any
thunder, and most likely no showers will form at all given dry
air aloft. Did add a couple small areas of slight chc pops
however for a few hours this afternoon however.

Otherwise weak hurricane maria will remain far enough offshore
to have minimal effects on our area as it continues to move
slowly north through today, other than keeping a northeast wind
direction with speeds in the 10-15 mph for piedmont areas and
maybe a gust or two approaching 20 mph. Not all that unusually
for late september in any case. Does not look like any
peripheral showers will even reach into our piedmont areas.

By tonight despite the fact that maria still will not quite be
ready to shift eastward and away from the coast, low-level
clouds on the far western periphery are expected to pull east
and dissipate per most model guidance and some weakening of the
system, and thus do not expect any low-level cloudiness to
persist over the piedmont, but more likely to develop in spots again
in mountain valleys, along with patchy fog. This an almost
routine occurrence for this time of year. Mild low temperatures
expected once again.

Short term Wednesday through Friday night
As of 300 am edt Tuesday...

during this portion of the forecast, a ridge of mild and dry high
pressure will be situated across the area on Wednesday, all while
hurricane tropical storm maria moves north through the western
atlantic east of the north carolina coast. By Thursday, maria will
be jogging northeast and increasing in speed as a tropical storm,
while a cold front heads southeast across the region. The front will
be very moisture starved, and currently, at best we are anticipating
increased cloud cover across the mountains with little if any
associated precipitation.

The biggest impact the front will have will be a notable change in
airmass. We will quickly transition from above normal and more humid
than normal conditions, to a pattern that is only slightly above
normal on Friday and Friday night, along with lower humidity
readings. Somewhat windy conditions are anticipated behind the front
Friday into Friday night. Gusts of 25 to 30 mph will be possible at
the higher ridge tops, with weaker gusts across the mountain valleys
and piedmont region.

Long term Saturday through Monday
As of 203 pm edt Monday...

500 mb trough digs across the great lakes into our area Friday into
Saturday with high pressure starting to shift southward from the
great lakes into Sunday. Will be a dry cooler with temps close to or
below normal. Later Sunday into Monday the flow turns more northeast
as the high wedges southward. Should start to see clouds increasing
Monday especially as the flow turns more east off the ocean. At the
moment confidence in any showers is low, so keeping pops below 15

Aviation 08z Tuesday through Saturday
As of 158 am edt Tuesday...

no change with overall good flying conditions expected to
continue through today and tonight with high pressure at surface
and aloft in place. This will yield mainlyVFR conditions under
some high cirrus clouds as well as passing scattered strato
cumulus into tonight. Only exception being late night and early
morning valley fog stratus west of the blue ridge, possibly
resulting in a period of ifr CIGS vsbys at klwb and kbcb. A bit
more potential for fog stratus early this morning compared to
previous morning given some increase in dewpoints and breaks in
the cirrus overnight. However given dry air, not ready to
indicate widespread sub-VFR such as some of the model guidance
is suggesting. Kblf guidance especially lower than what would
expect so kept only a brief tempo for MVFR fog there.

Any fog stratus dissipates quickly this morning withVFR
through the end of the valid period. However some increase in
lowerVFR CIGS possible east of the blue ridge Tuesday afternoon
as bands of strato-cumulus push inland around far west edge of maria
still well offshore, but believe any MVFR or lower ceilings will
remain east of TAF sites. Very slight chance for an isolated afternoon
shower on ridges to the west of klwb and maybe kblf but if these
can even form will unlikely move into vicinity of these

Winds will generally be light north to northeast, though
northeasterly flow around maria off the east coast will amplify
winds, and generate some gusts around 15 to 20 kts at times
mainly east of the blue ridge during the afternoon.

Lower CIGS may develop espcly well east of the blue ridge late
tonight into early Wednesday as maria makes it closest approach
offshore the carolinas. Latest guidance suggests a swath ofVFR
to MVFR CIGS may advect farther inland on increasing northeast
flow with at least a period of sub-vfr possible in the piedmont early
Wednesday but there is a chance this will remain east of kdan
and klyh. Patchy valley ifr fog likely again by late tonight and
early Wednesday.

Extended aviation discussion...

maria should exit farther offshore Wednesday night into Thursday
ahead of a cold front that looks to cross the region from the
west during the day. Front appears mainly dry with just a band
of upslope aided low clouds possible behind the front Thursday
before much drier post frontal air swings in on northwest winds
later Thursday into early Friday. Strong high pressure then
follows the boundary with continuedVFR outside of added upslope
clouds far west Friday through Saturday.

Rnk watches warnings advisories
Va... None.

Nc... None.

Wv... None.

Synopsis... mbs sk
near term... Sk
short term... Ds
long term... Wp
aviation... Jh mbs sk

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Roanoke, Roanoke Regional Airport, VA27 mi73 minW 310.00 miFair63°F62°F97%1015.8 hPa

Wind History from ROA (wind in knots)
Last 24hrCalmW4N6NE9NE6N6N6N5N7N9NE8NE6N4E3CalmCalmCalmCalmCalmCalmCalmCalmW3Calm
1 day agoCalmW3N8NE9N7N834N4N3SE5E6E3W3CalmCalmW3CalmCalmCalmCalmCalmCalmW3
2 days agoCalmN6N9N7N6N6CalmCalmSE8SE7SE7SE6E6W3CalmS3CalmNE3W3W4W3CalmCalmCalm

Tide / Current Tables for
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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 Blacksburg, VA (7,2,3,4)
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Ground Weather Radar Station Blacksburg, VA
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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 L-36.com. 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 L-36.com 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.