Friday, August18, 2017

Marine Weather and Tides
Union, WV

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 6:40AMSunset 8:10PM Friday August 18, 2017 11:36 PM EDT (03:36 UTC) Moonrise 2:10AMMoonset 4:49PM Illumination 10% Phase: Waning Crescent; Moon at 26 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 Union, WV
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location: 37.62, -80.47     debug

Area Discussion for - Blacksburg, VA
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Fxus61 krnk 190022
area forecast discussion
national weather service blacksburg va
822 pm edt Fri aug 18 2017

A weak cold front will cross the mountains from the west this
evening before sliding southeast of the region overnight. The
front will remain over the carolinas Saturday into Sunday before
dissipating. High pressure works in from the ohio valley during
the weekend, then overhead Monday resulting in drier weather
across the region.

Near term through Saturday
As of 810 pm edt Friday...

deep convection ahead of the cold front is exiting off to the
east as the actual surface boundary is entering from the west
with just a few isolated showers. Expect precipitation to be
winding down shortly with dry conditions for the overnight. The
airmass behind the front is not a remarkable change and expect
the boundary layer to remain moist. Combined with decreasing
cloud cover allowing for some radiational cooling, patchy valley
fog looks like a good bet west of the blue ridge. Lows tonight
will be in mid 60s to around 70 degrees east of the ridge, with
low mid 60s west with some cooler readings in the valleys.

Previous discussion...

weak cool advection along with slightly lower dewpoint air will
follow the front in from the northwest by morning allowing lows
to dip well into the 60s mountains, while lingering closer to
70 southeast. Fog likely limited to the deeper valleys and
eastern sections that possibly see more showers through early

Front sags into the carolinas before stalling Saturday in
advance of the next shortwave trough that will approach the
region during the afternoon. This should basically put the area
in between deeper moisture to the southeast, and lift beneath
the cold pool with the shortwave crossing the ohio valley.

Latest guidance supports an overall dry scenario with dry air
aloft off forecast soundings, and low level northwest flow
beneath rather meager instability Saturday afternoon. Cant
totally rule out a sprinkle or shower reaching the far northwest
counties late in the day but not enough to include a pop mention
for now. Otherwise partly to mostly sunny and a bit less humid
with highs still 80s to near 90 east, as weak downslope offsets
slight cooling aloft.

Short term Saturday night through Monday night
As of 240 pm edt Friday...

an upper level trough will pivot over the region Saturday night. Not
much cool air is behind this trough, therefore temperatures Sunday
will warm back above normal with mid 80s west to near 90f east. The
only notable change will be slightly drier air (dew points in the
low 60s west to upper 60s east) with a westerly breeze.

Dry high pressure with increasing heights aloft will continue to
keep most of the region dry through Monday night. Some low level
moisture may creep into the area from the south Monday. This
moisture and upslope flow may generate a few storms across the north
carolina high country late in the afternoon, fading in the evening.

Under mostly sunny skies, temperatures will warm a little above
normal Monday with 80s west to lower 90s east.

Long term Tuesday through Friday
As of 255 pm edt Friday...

a western atlantic upper level ridge will track westward over the
gulf states through early next week. This ridge will push
temperatures 5f to 10f warmer than normal. With an increase in heat
and humidity, scattered showers and thunderstorms are expected
Tuesday afternoon across the mountains and then moving and fading
across the foothills in the evening.

On Wednesday, models are wanting to bring a cold front south into
the gulf states, pushing the upper level ridge into the gulf.

Considering climatology for the time of year, models look to be over
zealous with moving this front into a hot and humid air mass. I
would not be surprised to see a slowing trend with the frontal
passage being more towards Thursday. For now, kept timing close to
guidance while keeping pops low. Until the front clears the area,
temperatures will stay 5f to 10f warmer normal. Following the front,
temperatures will be 5f or cooler than normal.

Aviation 00z Saturday through Wednesday
As of 815 pm edt Friday...

deep convection ahead of the cold front is exiting off to the
east as the actual surface boundary is entering from the west
with just a few isolated showers. Expect precipitation to be
winding down shortly withVFR conditions for the overnight east
of the blue ridge. However, the airmass behind the front is not
a remarkable change and expect the boundary layer to remain
moist. Combined with decreasing cloud cover allowing for some
radiational cooling, patchy valley fog looks like a good bet
west of the blue ridge with lifr for klwb, and a tempo to ifr at
kbcb. Fog stratus will dissipate early Saturday morning,
allowing high pressure to bringVFR conditions to all TAF sites
through the end of the valid period. Winds will generally be

Extended aviation discussion...

mainlyVFR conditions for the second half of weekend under weak
high pressure. Scattered thunderstorms and periods of MVFR
conditions return next week, with late night early morning fog
possible almost any day. Better potential for sub-vfr will come
Wednesday when more widespread showers and storms arrive with
the next cold front.

As of 400 am edt Friday aug 18th...

kfcx doppler radar expected to be down for the rest of the
month due to a failing bull gear. Technicians are working on the
radar, through next week and the radar will most likely stay
down completely as the repairs are being made.

Rnk watches warnings advisories
Va... None.

Nc... None.

Wv... None.

Synopsis... Jh
near term... mbs jh
short term... Rcs
long term... Rcs
aviation... mbs jh
equipment... Rab wert wp

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lewisburg / Greenbrier, WV18 mi61 minN 07.00 miFair67°F65°F95%1016.9 hPa

Wind History from LWB (wind in knots)
Last 24hrCalmCalmCalmN3CalmCalmCalmCalmCalmSW6SW6SW8SW8
1 day agoCalmNE3CalmCalmCalmNE3CalmN4CalmCalmCalmCalmS4SW5SW7W8SW9SW7SW8E5CalmNE3CalmCalm
2 days agoCalmCalmCalmCalmN4CalmCalmCalmCalmCalmCalmCalmS5S3CalmNE3W3NW3W5SW3CalmCalmCalmCalm

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 (23,6,7,8)
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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 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.