Friday, August18, 2017 L-36.com


Marine Weather and Tides
Accomac, 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 6:19AMSunset 7:52PM Friday August 18, 2017 12:05 PM EDT (16:05 UTC) Moonrise 1:50AMMoonset 4:29PM Illumination 14% 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
    EDIT      (on/off)   Help
ANZ652 Coastal Waters From Chincoteague To Parramore Island Va Out 20 Nm- 1001 Am Edt Fri Aug 18 2017
Rest of today..S winds 15 to 20 kt. Seas 2 to 3 ft with a dominant period of 5 seconds...building to 3 to 4 ft with a dominant period of 5 seconds late. A chance of showers this late morning and early afternoon, then a slight chance of showers late.
Tonight..SW winds 15 to 20 kt...becoming W 10 to 15 kt late. Seas 3 to 4 ft with a dominant period of 6 seconds. Showers likely in the evening. A chance of tstms until early morning. A chance of showers after midnight.
Sat..NW winds 10 to 15 kt...becoming sw 5 to 10 kt in the afternoon. Seas 2 to 3 ft with a dominant period of 6 seconds. A chance of showers early in the morning.
Sat night..SW winds 5 to 10 kt. Seas 1 to 2 ft...mainly S swell with a dominant period of 6 seconds.
Sun..NW winds 5 kt...becoming S in the afternoon. Seas 1 to 2 ft...mainly S swell with a dominant period of 7 seconds in the morning.
Sun night..S winds 5 kt. Seas 1 to 2 ft.
Mon..SE winds 5 to 10 kt. Seas around 2 ft.
Mon night..S winds 5 to 10 kt. Seas around 2 ft.
Tue..S winds 5 to 10 kt...increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft.
Tue night..SW winds 10 to 15 kt. Seas 3 to 4 ft. Winds and seas higher and visibilities lower in and near tstms.
ANZ600 1001 Am Edt Fri Aug 18 2017
Synopsis for fenwick island de to currituck beach light nc out 20 nautical miles including virginia portion of the chesapeake bay currituck sound and portions of the james, york, and rappahannock rivers.. A cold front will approach from the northwest today and drop into the region tonight. The front then stalls and weakens near the mid atlantic coast through Sunday. High pressure rebuilds over the area early next week.

7 Day Forecast for Marine Location Near Accomac, VA
   Hourly   EDIT   Help
location: 37.7, -75.64     debug


Area Discussion for - Wakefield, VA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kakq 181545
afdakq
area forecast discussion
national weather service wakefield va
1145 am edt Fri aug 18 2017

Synopsis
A warm and humid air mass remains in place across the mid-
atlantic states today on continued south flow. The next cold
front will arrive late tonight and exit the region by Saturday
morning. High pressure builds in for Saturday night through
early next week.

Near term until 8 pm this evening
Initial showers that developed early this morning are
dissipating quickly and the low stratus deck that has been
in place for most areas except along coastal areas of the
tidewater and NE nc is quickly dissipating too. As a result the
sun will be coming out and temperatures will quickly jump into
the upper 80s and continue up into the low 90s for most areas.

Ahead of the cold front, seeing lots of clear sky across WRN va
so warming should continue through the afternoon hours. With
dewpoints in the mid 70s to around 80 will see heat indices from
around 100 to 109 across the area. The highest values will be
across SE along the ches bay from the middle peninsula southward
into NE nc. So have issued a heat advisory for that area for the
rest of the afternoon.

Still looks like afternoon convection will form this afternoon
across WRN va and then head ese across the region. The 12z nam
is more enhanced with the convection so will need to monitor for
possible severe as CAPE is now forecast to between 3000 - 4000
j kg. The winds aloft are not extremely strong and the direction
shear is minimal. The mostly likely threat would be wind damage
from downburst.

Short term 8 pm this evening through Sunday
The front slowly pushes southeast early Saturday, and models
have once again trended a bit faster with the frontal passage,
allowing for a quicker end to showers Sat morning.

A strong shortwave trough sweeps across the mid-atlantic states
Saturday night, but it remains north of the area and with the
low level moisture gone, not anticipating much except some mid
level clouds. By Sunday, high pressure will be over the region
with dry and seasonable weather in place.

For temperatures, will continue to see near normal weather with
highs in the upper 80s to around 90 each day and lows in the low
to mid 70s each night except for Saturday night when the drier
air will allow temps to drop into the upper 60s to low 70s.

Long term Sunday night through Thursday
Sfc high pressure builds north of the area with stacked high
pressure residing off the southeast coast through Mon night.

A thermal trough develops in the lee of the appalachians for
tue Tue night, and then a cold front is expected to track
through the area on wed... Exiting the coast late Wed night.

Conditions will become increasingly more humid with each
passing day. Sfc features rather diffuse for mon, however
seabreeze boundaries with the presence of ample moisture will
keep a slight chance for showers storms in the forecast...

primarily for the aftn early evening. Thunderstorm activity
expected to become widely scattered Tue as convection develops
invof lee trough. The frontal passage Wed wed night will
provide a better focus for more organized thunderstorms to
occur. Highs mon-wed generally upper 80s to lower 90s;
low-mid 80s beaches. Lows sun-tue nights generally 70-75f.

Lows Wed night mid-upper 60s NW to 70-75f se.

Aviation 16z Friday through Tuesday
Low stratus across terminals this morning with ifr MVFR CIGS at
ric sby phf orf. Expect stratus to slowly scour out through
13-14z, with an improvement toVFR at all sites by 15-16z.

A cold front approaches the region today, with showers and
thunderstorms developing and becoming more widespread by this
evening into Saturday morning. This will bring another chance
for sub-vfr conditions late in heavier showers, mainly
ric sby phf. Confident enough to throw showers and vicinity
thunder wording in at ric sby, but will keep thunder mention
out for now at orf phf.

Outlook:VFR conditions returns later Sat through the weekend as
high pressure builds back into the region. Some early morning
fog possible both Sunday and Monday mornings.

Marine
Latest sfc analysis shows weak high pressure offshore with a cold
front over the oh valley. This front will track east towards the mid
atlc today, with southerly flow increasing ahead of the front as the
pressure gradient increases. By this aftn eveng before the fropa
conditions will be close to SCA criteria over bay due to ~15 kt
sustained winds and northern cstl wtrs due to 4 ft seas. Not
confident enough that SCA conditions will occur to issue headlines
attm. The cold front drops into the wtrs tonight, with shras tstms
psbl and winds waves seas decreasing thereafter. For sat, with the
front weakening in the vicinity, expect winds AOB 10 kt by the aftn
with 1-2 ft waves over the bay and 2-3 ft seas over cstl wtrs.

Similar conditions into Sun with little change in the overall
pattern. Sub-sca conditions will continue into early next week with
weak sfc high pressure in the area.

Akq watches warnings advisories
Md... None.

Nc... Heat advisory until 8 pm edt this evening for ncz013>017-
030>032.

Va... Heat advisory until 8 pm edt this evening for vaz084-089-090-
093-095>098-523>525.

Marine... None.

Synopsis... Mam
near term... Ess mam
short term... Ess mam
long term... Bmd
aviation... Mam jao
marine... Mas


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAHV2 - 8631044 - Wachapreague, VA 7 mi48 min SSW 12 G 15 85°F 83°F1012.8 hPa
44089 17 mi36 min 78°F3 ft
RPLV2 - 8632837 - Rappahannock Light, VA 23 mi48 min S 9.9 G 11 1013.5 hPa
44058 - Stingray Point, VA 34 mi36 min SW 7.8 G 12 83°F 1012.7 hPa
KPTV2 - 8632200 - Kiptopeke, VA 41 mi48 min S 4.1 G 5.1 80°F
BISM2 - 8571421 - Bishops Head, MD 42 mi48 min S 13 G 16 81°F 81°F1012.4 hPa
44042 - Potomac, MD 43 mi36 min SSW 5.8 G 5.8 82°F 1011.2 hPa
YKRV2 - 8637611 - York River East Rear Range Light, VA 48 mi48 min SW 9.9 G 11 84°F 1013.1 hPa
44072 48 mi36 min WSW 5.8 G 7.8 84°F
LWTV2 - 8635750 - Lewisetta, VA 48 mi48 min SSW 9.9 G 12 82°F 81°F1011.8 hPa

Wind History for Rappahannock Light, VA
(wind in knots)    EDIT      (on/off)   Help
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last
24hr
S2
S3
SW6
SE13
SE14
SE13
SE16
SE14
G17
SE13
SE16
SE13
SE12
SE15
S15
S16
S16
S16
S17
S16
S18
S16
S15
S13
S10
1 day
ago
N8
N7
NE5
NW5
NW4
SE1
S7
S8
S7
SE8
SE8
S9
S8
S9
S7
S9
S9
SW8
SW7
SW9
S7
S6
S5
S1
2 days
ago
S4
SW4
S3
NW29
G36
N12
E6
E7
E3
NE3
NE2
NW3
NW3
N6
NE4
NE2
NE2
N2
N5
N14
N14
N13
N11
N11
N11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Melfa / Accomack Airport, VA8 mi71 minSSW 910.00 miPartly Cloudy86°F79°F81%1012.9 hPa
Wallops Flight Facility Airport, VA19 mi72 minS 1310.00 miMostly Cloudy85°F80°F85%1012.8 hPa

Wind History from MFV (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrCalmSE7SE10S10SE9SE7S8SE6S6S6S8S7S6S6S5S7S7SW6S7S6SW8
G15
SW9SW8SW8
1 day agoN3NE5W3SE4SE7S5S4S5S4SE4CalmS3CalmS3SW3SW4CalmCalmCalmS3CalmCalmNW4Calm
2 days agoS4CalmN4N8------------------------------------N5N4

Tide / Current Tables for Folly Creek, Metompkin Inlet, Virginia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Folly Creek
Click for Map
Fri -- 12:08 AM EDT     0.20 feet Low Tide
Fri -- 02:50 AM EDT     Moonrise
Fri -- 06:09 AM EDT     3.07 feet High Tide
Fri -- 06:20 AM EDT     Sunrise
Fri -- 12:08 PM EDT     -0.06 feet Low Tide
Fri -- 05:29 PM EDT     Moonset
Fri -- 06:48 PM EDT     4.19 feet High Tide
Fri -- 07:50 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.30.81.42.12.83.12.92.51.810.3-0.10.10.71.52.43.444.23.93.22.31.3

Tide / Current Tables for Onancock, Onancock Creek, Chesapeake Bay, Virginia
   EDIT      (on/off)   Help   One Week of Data
Onancock
Click for Map
Fri -- 02:50 AM EDT     Moonrise
Fri -- 04:00 AM EDT     0.15 feet Low Tide
Fri -- 06:21 AM EDT     Sunrise
Fri -- 09:36 AM EDT     1.84 feet High Tide
Fri -- 03:57 PM EDT     0.06 feet Low Tide
Fri -- 05:29 PM EDT     Moonset
Fri -- 07:51 PM EDT     Sunset
Fri -- 10:09 PM EDT     2.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.510.60.30.10.30.61.11.51.81.81.61.30.90.50.20.10.20.61.21.72.12.32.2

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Wakefield, VA (12,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.