Marine Weather and Tides
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 7:25AM||Sunset 7:30PM||Saturday March 17, 2018 8:10 PM EDT (00:10 UTC)||Moonrise 6:44AM||Moonset 6:44PM||Illumination 1%|
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7 Day Forecast for Marine Location Near North Shore, VAHourly EDIT Help
Area Discussion for - Blacksburg, VA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 krnk 180007|
area forecast discussion
national weather service blacksburg va
807 pm edt Sat mar 17 2018
A low pressure system will arrive from the northwest tonight.
This system will move southward toward south carolina and
georgia by Sunday morning. Another complex storm system works in
from the west next week with wintry precipitation possible.
Near term through Sunday
As of 800 pm edt Saturday...
isolated showers and thunderstorms continue to drift eastward
from kentucky and tennessee into southeast west virginia and far
southwest virginia. SPC maintains a hail and wind threat due to
steep lapse rates aloft and decent effective bulk 0-6 km shear.
The severe thunderstorm watch remains in effect until midnight
tonight. Pea size hail has been reported in a few locations,
but the storms have not yet been impressive. The convection is
racing the clock to sunset as instability should sharply cut off
afterward. Little if any thunder may reach the southern
virginia and north carolina piedmont after midnight as the
showers head toward the southeast along the warm front.
Minor adjustments to pops and temperatures for this update.
Thickening stratus overnight and a decent thermal gradient
makes this forecast for lows a little tricky. Low clouds appear
most likely over the new and roanoke river valleys toward Sunday
morning. Deep moisture fades from drying aloft early Sunday as
upper support exits and shortwave ridging starts to take shape.
This in conjunction with weak high pressure under light
north northwest flow should allow for clearing from north to
south by afternoon with comfortable highs in the 50s to lower
60s similar to the latest ECMWF mos.
Short term Sunday night through Tuesday night
As of 300 pm edt Saturday...
the transition of the upper pattern from an eastern ridge to a broad
ridge is now looking to be a rather complex evolution as the ridge
flattens and several spokes of southern stream short wave energy
gradually carve out a successively deeper trof. Expectation is for
generally wet weather through midweek.
The first part of Sunday night looks to be dry, but a developing
wedge will combine with low pressure emerging along the coast to
bring southeasterly flow and robust isentropic lift over the region,
which leads to increasing rain chances overnight.
The situation remains relatively unchanged for Monday with
increasing dynamic support and increasing coverage of rain as a wave
moves through the mississippi valley and approaches the appalachians
from the west. The wave will move through the region Monday night
with a good dose of widespread precipitation. There also looks to be
potential for convective development upstream outside of the wedge
that would slide into the region and greatly enhance precipitation,
though any specific details are murky at this point. Also of note is
the steady cooling of the airmass from north to south which allows
for a gradual transition mix of ptype far north Monday night but any
slushy accumulations look minimal through early Tuesday.
After perhaps a brief respite early on Tuesday, the next wave will
approach late in the day and renew precipitation across the region
with good forcing over the wedge and potential convection
developing moving in from outside of the wedge. Complex situation
continues to unfold Tuesday night as additional short wave energy
fuels coastal low redevelopment with good isentropic, large scale
synoptic ascent, and mesoscale deformation over the region as the
cooling wedge deepens. Very early in the game but accumulating wet
snow looks to be a possibility across a good part of the region by
With the developing upper trof expect temperatures to be trending
downward to well below normal through midweek.
Long term Wednesday through Saturday
As of 300 pm edt Saturday...
additional short wave energy continues to fuel the train of coastal
low formation through Wednesday which will keep a good chance of
some wet snow across the region. Diurnal effects in late march may
limit any accumulations to along west of the blue ridge but far too
early for specifics. As the closed upper low moves across the region
synoptic forcing lingers along with the decreasing possibility for
wet snow through early Thursday. Northwest flow will also be on the
increase and will support upslope snow showers at the higher
elevations west of the blue ridge into Thursday night. The upper
trof axis finally pushes to our east and allows for a break of fair
weather on Friday before a warm front starts to push precipitation
back in our direction from the west late Friday night.
Temperatures will start the period well below normal, then moderate
a bit but remain on the cool side through the end of the week.
Aviation 00z Sunday through Thursday
As of 800 pm edt Saturday...
isolated showers and thunderstorms are moving eastward into
southeast west virginia and far southwest virginia. Vcts was
inserted into blf and bcb to account for the latest radar
trends. Expect shower activity to drift southeastward toward
roa lyh dan between 00z and 05z. By that point, instability
will weaken enough to make thunder too low in confidence to
mention. Lwb is too far north of the warm front and instability,
which means the best confidence for no thunder exists here.
Once the showers fade after 05z, low stratus clouds will develop
throughout the area. Confidence is rather high that ceilings
could plummet to ifr lifr for blf lwb roa bcb, but it is more
questionable toward lyh and dan. MVFR ifr conditions appear
more likely further east in the piedmont. Ceilings should
improve toVFR during 12z to 15z as drier air arrives from the
northwest. Good flying weather should persist through the
remainder of Sunday.
Extended aviation discussion...
another low pressure system should push eastward from the plains
on Monday. The warm front associated with this system could
bring ifr MVFR conditions due to ceilings and showers for
Monday night into Tuesday. As the low pressure system heads
offshore on Tuesday night, precipitation wrapping along the
western periphery of this system could bring a period of snow
showers, MVFR ifr conditions, and gusty north to northwest winds
on Wednesday. Drier air should finally bring conditions back to
vfr by Thursday as high pressure builds from the northwest.
As of 940 am edt Friday...
the mount jefferson nwr remains off the air and will likely be
sometime next week before it is operational again.
Rnk watches warnings advisories
Synopsis... Jh pw
near term... Jh pw
short term... mbs
long term... mbs
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|Roanoke, Roanoke Regional Airport, VA||27 mi||17 min||NE 6||10.00 mi||Mostly Cloudy||57°F||43°F||60%||1008.2 hPa|
Wind History from ROA (wind in knots)
|1 day ago||W|
|2 days ago||W|
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