Friday, December15, 2017 L-36.com


Marine Weather and Tides
Clarksville, 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 7:16AMSunset 5:01PM Friday December 15, 2017 9:09 AM EST (14:09 UTC) Moonrise 4:43AMMoonset 3:36PM Illumination 8% Phase: Waning Crescent; Moon at 27 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 Clarksville, VA
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location: 36.59, -78.5     debug


Area Discussion for - Wakefield, VA
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Fxus61 kakq 151131
afdakq
area forecast discussion
national weather service wakefield va
631 am est Fri dec 15 2017

Synopsis
High pressure retreats to a position off the new england coast
today. Meanwhile, low pressure develops just off the coast this
afternoon, then tracks northeast and away from the area
tonight. High pressure returns for the weekend.

Near term until 6 pm this evening
Sfc high pressure centered over the DELMARVA this morning will
gets squeezed to the NE today as low pressure and an upper
trough pivot through the great lakes. Meanwhile, a weak wave of low
pressure is expected to develop INVOF the northern obx by mid to
late morning, then quickly track NE off the mid-atlantic coast
late this afternoon and evening. Latest guidance brings a swath
of moisture across the northern tier of the fa around midday,
then over the eastern shore this afternoon and early evening
before exiting the coast by 10 pm. Some enhancement of the
moisture is noted by the latest hi-res guidance with support
from the 00z suite of models this aftn eve as it crosses the
eastern shore, particularly across northern dorchester county.

Bufkit soundings suggest about a 3-5 hour period of pcpn
between 18z-00z with pcpn possibly lingering near oxb thru about
02z sat. Have slight chc pops (~20%) north of ric late this
morning midday, then increasing to likely categorical (55-80%)
over the md eastern shore this afternoon. Otherwise, dry south
of i-64.

Thermal profiles suggest mainly snow across dorchester county,
with a buffer area of a rain snow mix to snow across caroline
county, the northern neck, and the rest of the interior lower
md eastern shore. Most likely it's just plain rain along the md
coast, mixing with or changing to snow briefly before ending.

Sfc temps will primarily remain above freezing during the event,
limiting snow accumulations before falling by sunset. For that
reason, kept snow accumulations limited to the lower md eastern
shore. Generally under one-half inch expected, but with highest
amounts up to ~1" possible across northern dorchester county. In
coordination with neighboring offices, will not be issuing a
winter wx advisory at this time due to minimal snow
accumulations and temps AOA freezing. However, timing of the
heaviest snowfall will occur around the late aftn eve commute so
motorists should be prepared to take necessary precautions.

Highs today mid-upr 30s north to low mid 50s NE nc.

Short term 6 pm this evening through Sunday
Any lingering snow shower push of the md coast by late eve with
decreasing from west to east. Lows mid 20s NW to lwr 30s se.

High pressure builds over the sern states Sat then moves offshore
sun. Dry through this period. Highs Sat in the mid-upr 40s.

Lows Sat night mid 20s nw-mid 30s se. Highs Sun upr 40s N to
mid 50s s.

Long term Sunday night through Thursday
A welcomed return to south-southwesterly flow on Sunday will bump
temperatures into the middle 50s. High pressure slowly meanders
offshore to the east on Sunday night and into Monday, allowing for
an uptick in moisture advection across the south.

The european is beginning to lean towards a drier, gfs-like solution
for Monday. Better chances for measurable rainfall exist across our
nc counties and extreme southeastern va Monday aft eve. Temperatures
during the day will rise into the upper 50s, so no worries about any
wintry precip.

Tuesday's temps will strive for the low 60s in the afternoon, with
one caveat being cloud cover. The GFS and euro begin to disagree
during this timeframe, with the euro being much drier at the mid
levels than the gfs. As such, the GFS is more bullish on cloud cover
and rain chances Tuesday afternoon and evening. Leaned more towards
the euro solution, trimming back pops Tuesday... Will wait for better
model agreement to increase confidence on Tuesday being any drier
than currently forecast.

The spigot abruptly shuts off early Wednesday morning as any
moisture slides off the coast. Expect highs Wednesday and Thursday
to be 7-10 degrees cooler than Tuesday.

Aviation 12z Friday through Tuesday
High pressure heads NE today and a coastal low pressure system
passes offshore of the region this afternoon evening.

Precipitation is expected to develop mainly after 18z and impact
primarily sby eastern shore. The precipitation will be a rain snow
mix at sby, bringing the potential for MVFR to ifr CIGS vsbys
between 18z and 00z. MVFR CIGS will also be possible between 18z
and 00z at orf and phf.

Outlook: the coastal low pressure system moves well offshore
tonight and high pressure builds back into the area for the
weekend.VFR conditions are expected through the weekend before
a weak disturbance potentially impacts the region on Monday.

Marine
Sfc high pressure over md de will retreat NE later today as sfc low
pressure just off the carolina coast slowly tracks NE off the nc va
coast this aftn and intensifies this evening while moving farther ne
off the mid-atlc coast. While this system is not particularly strong
and the rapid intensification looks to be delayed until it moves
farther out to sea, think at least marginal SCA conditions are
likely to be met this evening into early Sat morning. Raised sca
headlines for all coastal waters bay currituck sound mainly for
tonight, though expect the higher winds to linger into late sat
morning for northern coastal waters where pressure rises in excess
of 1mb hr persist a few hrs longer.

Winds will diminish to 10-15 kt by Sat aftn as as sfc high
pressure becomes centered over the SE us coast, winds will shift
more to the SW from Sat night through Sunday with speeds
averaging around 10 kt. Winds will remain light on Monday, but
expect a strong increase on Tuesday as a frontal boundary and
developing surface low approach the area, followed by another
shot of cold air for the midweek time frame.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... Small craft advisory from 7 pm this evening to 7 am est
Saturday for anz630>632-634-656-658.

Small craft advisory from 7 pm this evening to 4 am est
Saturday for anz633.

Small craft advisory from 10 pm this evening to 10 am est
Saturday for anz650-652-654.

Synopsis... Jdm
near term... Jdm
short term... Jdm mpr
long term... Ajb
aviation... Ajb jdm
marine... Lkb


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Henderson-Oxford Airport, NC16 mi90 minNNE 610.00 miPartly Cloudy29°F20°F70%1016.3 hPa

Wind History from HNZ (wind in knots)
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Last 24hrSW10
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SW6W3W3N4N3N4NE3N3NE3E6NE4NE4NE4NE5NE6NE7NE9NE6NE5
1 day agoW6NW9
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2 days agoSW7CalmCalmW3W6W10
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Tide / Current Tables for Petersburg, Appomattox River, James River, Virginia
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Petersburg
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Fri -- 01:40 AM EST     2.65 feet High Tide
Fri -- 04:39 AM EST     Moonrise
Fri -- 07:16 AM EST     Sunrise
Fri -- 08:40 AM EST     -0.15 feet Low Tide
Fri -- 02:00 PM EST     2.99 feet High Tide
Fri -- 03:30 PM EST     Moonset
Fri -- 04:53 PM EST     Sunset
Fri -- 09:27 PM EST     -0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
22.52.62.31.81.20.70.3-0.1-0.10.41.32.12.732.82.31.81.20.70.2-0.2-0.10.5

Tide / Current Tables for Puddledock Sand
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Puddledock Sand & Gravel
Click for Map
Fri -- 01:30 AM EST     2.40 feet High Tide
Fri -- 04:39 AM EST     Moonrise
Fri -- 07:16 AM EST     Sunrise
Fri -- 07:35 AM EST     -0.04 feet Low Tide
Fri -- 01:58 PM EST     3.16 feet High Tide
Fri -- 03:30 PM EST     Moonset
Fri -- 04:53 PM EST     Sunset
Fri -- 08:13 PM EST     0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.12.42.42.11.71.10.60.100.71.52.12.633.232.51.91.30.500.20.91.4

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Wakefield, VA (9,2,3,4)
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Ground Weather Radar Station Raleigh/Durham, NC
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weather_mapweather_map weather_map

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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.