Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Union, WV

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:31AMSunset 8:07PM Wednesday April 25, 2018 10:12 AM EDT (14:12 UTC) Moonrise 2:41PMMoonset 3:20AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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 250953
afdrnk
area forecast discussion
national weather service blacksburg va
553 am edt Wed apr 25 2018

Synopsis
An upper level low and related surface low pressure center will
track northeastward across our region today into tonight. A
disturbance could bring more rain during Thursday and Friday. High
pressure should arrive to provide drier conditions by the upcoming
weekend.

Near term through tonight
As of 330 am edt Wednesday...

surface low pressure across central north carolina this morning will
rotate northeast today and reach new york by this evening. Then, the
low center lifts northeast into new england tonight.

This morning WSR-88D images showed pockets of rain lifting northward
across much of the region. The northeasterly flow is enhancing some
of the rain this morning in the east. Remnant convection to our
south weakened quickly as it encountered the stable wedge. Saturated
profiles, wet soils and light winds have lead to the development of
light mist, rain and patchy fog this morning. The cloudy, dreary and
rainy weather this morning will transition to drier and clearing
weather this afternoon in the east when the flow becomes northwest.

However in the west, upslope northwest flow will result in lingering
clouds and scattered showers. There may be enough instability in the
east this afternoon for an isolated shower or thunderstorm. Shaped
the pops this morning towards the hrrr and blended this afternoon
towards the namdng. A non-diurnal temperature curve was utilized
today with a slow warm up early followed by a late surge toward
sunset. High temperatures today will range from the lower 50s in the
mountains to the lower 70s in the piedmont.

Scattered upslope showers in the west will taper off this evening
into tonight as the low and the weak cold front move further away.

The combination of light winds and low level moisture may result in
some patchy fog tonight. Low temperatures tonight will vary from the
the upper 30s in the northwest mountains to the lower 50s in the
piedmont.

Short term Thursday through Saturday night
As of 500 am edt Wednesday...

a broad trough will persist across the eastern half of the
country within which will be embedded several more vigorous
upper-level short waves or closed lows. The first one of such
will moving northeast of the area Thursday while the second one
approaches from the south and southwest. These systems are
rather compact, but capable of producing substantial QPF over a
relatively small area. Thursday will bring the lull in
precipitation as the first one moves northeast of the area and
the second one will be approaching but still be in alabama
during the day. Clouds will likely linger and there could be
periods of drizzle and areas of fog, especially during the late
night early morning hours with abundant low-level moisture
remaining in place Thursday night into Friday morning, the
southeast u.S. System will take a turn to the northeast and lift
through the area with a negative tilt. Dynamics may be
sufficient enough for an isolated thunderstorm, mainly across nc
or the va piedmont area. Rainfall amounts should be in the 1 2
to 1 inch range, which should not result in any significant
flooding, but perhaps some nuisance poor drainage flooding and
minor rises on certain rivers creeks again, such as the watauga
river at sugar grove.

As we move into Friday, the northern stream trough across the
great lakes will deepen and absorb the southern stream short
wave as it moves north through the mid-atlantic. This will
finally eradicate the area of the deeper moisture in place
throughout the earlier part of the week and bring a deepening
northwest flow aloft to the area. Upslope rain and or snow
showers may be possible across the alleghanys of eastern wv
Friday night and Saturday as cold advection strengthens.

Temperatures will trend from near normal at the beginning of the
period to slightly below normal over the weekend as the trough
deepens.

Long term Sunday through Tuesday
As of 500 am edt Wednesday...

a large area of canadian high pressure will build across the
eastern u.S. Under a slowly progressive upper ridge that will
move from the central u.S. Into the eastern u.S. At the
beginning of the period. The increasingly strong upper ridge
will block any further precipitation producing systems from
reaching the area until perhaps the end of next week, with the
focus for excessive rainfall and thunderstorms focusing across
the southern and central plains during most of this period.

A notable warming trend is expected through the period as the
upper ridge builds over the east and 850mb temperatures warm
from near 0c on Sunday to +16c or better by the end of the week.

This should bring highs in the 60s west to 70s east early in the
week warming to highs in the 70s west to 80s east by the end of
the period. It could well be our longest stretch of warm,
springlike weather so far this year!

Aviation 10z Wednesday through Sunday
As of 553 am edt Wednesday...

poor flying conditions will continue during the TAF period
with rain, and low clouds and fog. A vertically stacked low
over north carolina this morning will move eastward today
into tonight. High pressure will continue to wedged down east
of the mountains today. Greatly varying ceilings this morning
will hinder aviation operations. Widespread ifr lifr conditions
will continue across the region today with a good chance of
rain at TAF sites. Pockets of fog will continue this morning
with some cooling, light winds and abundant low level moisture.

The heaviest rain this morning has been across the southwest
portion of the forecast area.

As the upper trof starts to pull away this afternoon into this
evening conditions will improve toVFR east of the blue ridge
but expect MVFR ifr to linger from the ridge westward due to
wind shifting to an upslope northwesterly direction. However,
some breaks of Sun in the east may create enough instability to
get some thunder going so will mention vcts at klyh and kdan
toward the end of the period.

Medium confidence in ceilings, visibilities and winds during
the TAF period.

Extended aviation discussion...

unsettled weather conditions should continue for the remainder
of this work week as another area of low pressure heads toward
the mid atlantic. MVFR ifr ceilings along with rain showers may
take place during Thursday night and Friday. High pressure
should build overhead to bringVFR conditions for all sites by
Saturday afternoon. Good flying weather will persist through
the remainder of this weekend.

Rnk watches warnings advisories
Va... None.

Nc... None.

Wv... None.

Synopsis... Kk
near term... Kk
short term... Rab
long term... Ds rab
aviation... Kk


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lewisburg / Greenbrier, WV18 mi37 minSSW 310.00 miOvercast52°F50°F94%1010.2 hPa

Wind History from LWB (wind in knots)
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Last 24hrE7
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1 day agoSE9S8
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2 days agoCalmSW4SW6SW3SW4SW3S4S5S6SE3S5S3SE4S3S3SE3SE3SE4SE3SE3SE4SE3E6SE8

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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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Blacksburg, VA (10,2,3,4)
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Ground Weather Radar Station Blacksburg, VA
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Disclaimer:
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.