Friday, January17, 2020
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L-36.com


Marine Weather and Tides
Gwynn, VA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:15AMSunset 5:15PM Friday January 17, 2020 8:18 AM EST (13:18 UTC) Moonrise 12:02AMMoonset 11:53AM Illumination 52% Phase: Third Quarter Moon; Moon at 22 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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ANZ631 Chesapeake Bay From Windmill Point To New Point Comfort Va- 702 Am Est Fri Jan 17 2020
.small craft advisory in effect through this evening...
Today..N winds 25 to 30 kt, diminishing to 15 to 20 kt. Waves 3 to 4 ft.
Tonight..NE winds 10 to 15 kt, becoming E 5 kt late. Waves 2 to 3 ft, subsiding to 1 foot late.
Sat..SE winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Waves 1 to 2 ft, building to 3 ft late. Rain likely in the afternoon.
Sat night..SW winds 15 to 20 kt. Waves 2 to 3 ft. Rain likely in the evening.
Sun..NW winds 15 to 20 kt. Waves 2 to 3 ft.
Sun night..NW winds 15 to 20 kt. Waves 3 to 4 ft.
Mon..NW winds 15 to 20 kt. Waves around 3 ft.
Mon night..NW winds 15 to 20 kt. Waves 3 to 4 ft.
Tue..N winds 15 to 20 kt. Waves 3 to 4 ft.
Tue night..N winds 10 to 15 kt. Waves 2 to 3 ft.
ANZ600 702 Am Est Fri Jan 17 2020
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.. Canadian high pressure builds into the area today into tonight. Low pressure tracks north of the region Saturday, with a cold front crossing the area Sunday. Turning much colder early next week, as another canadian high pressure system builds into the area.


7 Day Forecast for Marine Location Near Gwynn, VA
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location: 37.56, -76.13     debug


Area Discussion for - Wakefield, VA
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FXUS61 KAKQ 171147 AFDAKQ

AREA FORECAST DISCUSSION National Weather Service Wakefield VA 647 AM EST Fri Jan 17 2020

SYNOPSIS. Strong high pressure builds over the area today. The next cold front crosses the area Saturday night. Turning much colder early next week as Canadian high pressure builds into the area.

NEAR TERM /THROUGH TONIGHT/. As of 645 AM EST Friday .

Low pressure well off the New England coast continues to deepen as it pulls away into the north Atlantic. Very strong surface high pressure (1045mb+) is building into the region from the NW. Winds have calmed down over inland portions of the area but remain elevated over the water and near the coast. Clear skies and decoupling winds have allowed temperatures to fall off sharply early this morning with even a few upper 20s noted across the northwest where winds have been calm for longer overnight.

Mostly clear skies as high pressure ridge axis moves over the region this afternoon. A few bay streamer clouds are possible along the eastern shore and downstream of the Ches bay over SE VA and NE NC this morning. Much cooler today with continued cold advection on the eastern side of the surface high, afternoon high temps only top out in the upper 30s and low 40s. Clouds will slowly increase tonight as the next system approaches the area from the west, helping to keep low temps from dropping too far. Lows in the mid to upper 20s for inland locations, slightly cooler (low to mid 20s) across the eastern shore where clear skies will hold on the longest.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/. As of 345 AM EST Friday .

Attention quickly turns to the next area of low pressure approaching the region from the west on Saturday morning as high pressure migrates offshore. Most models continue to delay the onset of precipitation across the west with even slight chance PoPs holding off until after 12Z/7AM. Very dry low levels will take some time to saturate before precip reaches the surface but will provide an opportunity for efficient evaporational cooling, especially across the west/northwest where the relative greatest chance for light frozen/mixed precip exists. QPF is expected to be only a few hundredths through noon Saturday but the potential exists for a few hour window of mixed precip before the low levels warm above freezing and precip transitions to all rain. Given the dry air to overcome, minimal QPF, and the later timing for heavier precip moving in . still not expecting much of a winter threat from this event and no snow or ice accumulations are forecast.

PoPs increase markedly after 18Z with the highest chances across the north and northwest, transitioning eastward into the evening hours as the surface cold front nears the region. High temperatures will vary widely with in-situ CAD wedging noted across the NW and southeasterly winds off the warmer Atlantic. Expecting highs in the upper 30s for western Fluvanna and Louisa counties, mid/upper 40s for the I-95 corridor, and low/mid 50s for the SE. Precip ends rapidly from west to east Saturday night with lows ranging from the mid 30s NW to upper 40s SE.

Sunday will feature decreasing clouds behind the frontal passage with westerly/downsloping winds allowing temps to range from the mid 40s to mid 50s NW to SE. High pressure and decreasing winds will allow for a cold Sunday night with temps falling into the low 20s over the Piedmont.

LONG TERM /MONDAY THROUGH THURSDAY/. As of 255 PM EDT Thursday .

Medium range period characterized by cooler than normal temperatures and mainly dry conditions. Cold 1044+mb Canadian high pressure and its modifying arctic airmass will push into the area to begin the period early next week and linger over the Mid-Atlantic region through the forecast period. High temperatures in the 30s inland to low 40s SE coast are expected each day Mon through Thu. Early morning low temperatures mainly in the teens to low 20s inland . mid 20s to near 30 degrees along the coast.

AVIATION /12Z FRIDAY THROUGH TUESDAY/. As of 645 AM EST Friday .

VFR flying weather is expected for 12Z TAF period. Continued N or NNW winds last until this evening before becoming light and variable. Winds will remain 10-15 kts with gusts 20-25 kts. Winds slowly diminish but will retain gusts in the forecast until deep mixing subsides later this afternoon. High clouds increase from the west, especially after 18.06Z, ahead of the next area of low pressure.

OUTLOOK . Cold front crosses the area on Sat night. Pcpn mainly in liquid form is expected Sat and Sat night with flight restrictions possible. High pressure builds back in early next week.

MARINE. As of 345 AM EST Friday .

Low pressure is spinning E of Nova Scotia early this morning while 1046mb high pressure builds across the Great Lakes. This is driving strong CAA along the Mid-Atlantic coast resulting in a NNW wind of 30-35kt with gusts up to 40kt over the ocean, 25-30kt with gusts to ~35k over the Bay, and 20-25kt with occasional gusts near 30kt elsewhere. Seas range from 6-8ft N, to 8-10ft S, with 3- 5ft waves in the Bay. Gale warnings continue through 7 am for the Bay and 10 am for the ocean, with SCA flags for the Sound through 7 pm, lower James through 4 pm, and remaining rivers through 1 pm.

The high will build across New England this aftn into tonight. Therefore, the wind will diminish and become N 15-25kt by midday, then NNE 10-15kt this evening, and NE 5-10kt later tonight. Seas will slowly subside to 3-5ft N, to 4-6ft S by tonight. High pressure will push offshore Saturday into Saturday night as low pressure tracks across the Great Lakes Saturday and across New England Sunday. The wind will become SW 15-25kt with seas ranging from 3-5ft S to 4-6ft N, and 2-3ft waves in the Bay. A cold front crosses the coast Sunday night with the wind becoming NW 15-25kt, then a secondary cold front crosses the region Monday night with a 15-20kt NNW wind. High pressure builds into the region Tuesday into Wednesday.

AKQ WATCHES/WARNINGS/ADVISORIES. MD . None. NC . None. VA . None. MARINE . Small Craft Advisory until 1 PM EST this afternoon for ANZ635>637. Gale Warning until 7 AM EST this morning for ANZ630>632-634. Small Craft Advisory until 7 PM EST this evening for ANZ633. Small Craft Advisory until 4 PM EST this afternoon for ANZ638. Gale Warning until 10 AM EST this morning for ANZ650-652-654- 656-658.

SYNOPSIS . RHR NEAR TERM . RHR SHORT TERM . RHR LONG TERM . MAM AVIATION . RHR MARINE . AJZ


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RPLV2 - 8632837 - Rappahannock Light, VA 6 mi49 min NW 28 G 35 1036.6 hPa
44058 - Stingray Point, VA 7 mi43 min N 21 G 23 47°F1040.1 hPa
YKRV2 - 8637611 - York River East Rear Range Light, VA 24 mi49 min N 21 G 25 37°F 1037.1 hPa
WAHV2 - 8631044 - Wachapreague, VA 24 mi49 min N 12 G 17 34°F 44°F1035.5 hPa
44072 26 mi29 min ENE 19 G 27 37°F
KPTV2 - 8632200 - Kiptopeke, VA 28 mi49 min N 25 G 31 46°F
YKTV2 - 8637689 - Yorktown, VA 30 mi49 min NNW 17 G 21 36°F 49°F1036.5 hPa
YRSV2 - Chesapeake Bay,VA 32 mi49 min NNW 4.1 34°F 1038 hPa21°F
44042 - Potomac, MD 34 mi25 min NW 18 G 21 33°F 45°F1037.1 hPa
LWTV2 - 8635750 - Lewisetta, VA 35 mi55 min N 14 G 24 34°F 45°F1037.1 hPa
CHBV2 37 mi55 min N 21 G 25 37°F 1034.3 hPa
44087 37 mi49 min 47°F4 ft
44064 39 mi29 min N 23 G 31 1036.2 hPa
WDSV2 - 8638614 - Willoughby Deguassing , VA 41 mi55 min NNW 19 G 25 36°F 1036.1 hPa
DOMV2 - 8638511 - Dominion Terminal Association, VA 44 mi55 min N 17 G 23 36°F 1036.7 hPa
CHYV2 - 8638999 - Cape Henry, VA 44 mi49 min NNW 27 G 34 38°F 1035.8 hPa
SWPV2 - 8638610 - Sewells Point, VA 44 mi55 min 51°F1036.3 hPa
PPTM2 - 8578240 - Piney Point, MD 45 mi49 min N 20 G 24
BISM2 - 8571421 - Bishops Head, MD 46 mi55 min NNW 16 G 22 33°F 39°F1036.8 hPa
CRYV2 - 8638595 - South Craney Island, VA 48 mi49 min NW 12 G 18 36°F 1036.3 hPa

Wind History for Rappahannock Light, VA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Melfa / Accomack Airport, VA20 mi4.7 hrsno data10.00 miOvercast38°F21°F52%1031.5 hPa

Link to 5 minute data for KMFV

Wind History from MFV (wind in knots)
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Last 24hrCalm--------Calm----Calm--CalmCalm------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Windmill Point Light, Chesapeake Bay, Virginia
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Windmill Point Light
Click for Map
Fri -- 12:03 AM EST     Moonrise
Fri -- 04:00 AM EST     1.03 feet High Tide
Fri -- 07:18 AM EST     Sunrise
Fri -- 08:00 AM EST     Last Quarter
Fri -- 10:38 AM EST     -0.06 feet Low Tide
Fri -- 11:52 AM EST     Moonset
Fri -- 04:20 PM EST     0.93 feet High Tide
Fri -- 05:11 PM EST     Sunset
Fri -- 10:55 PM EST     -0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.40.70.9110.80.60.30.1-0-00.10.30.60.80.90.90.80.60.30.1-0.1-0.1

Tide / Current Tables for Windmill Point, Rappahannock River, Virginia
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Windmill Point
Click for Map
Fri -- 12:03 AM EST     Moonrise
Fri -- 04:00 AM EST     1.06 feet High Tide
Fri -- 07:18 AM EST     Sunrise
Fri -- 08:00 AM EST     Last Quarter
Fri -- 10:48 AM EST     -0.18 feet Low Tide
Fri -- 11:53 AM EST     Moonset
Fri -- 04:13 PM EST     0.87 feet High Tide
Fri -- 05:12 PM EST     Sunset
Fri -- 10:59 PM EST     -0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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00.40.811.110.80.60.30-0.1-0.2-0.10.20.50.80.90.80.70.50.2-0-0.2-0.3

Weather Map
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wmap_A
GEOS Local Image of Mid-Atlantic    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 Wakefield, VA (8,2,3,4)
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Ground Weather Radar Station Wakefield, 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 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 numerous 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.