Thursday, January21, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Gwynn, VA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:13AMSunset 5:20PM Thursday January 21, 2021 10:34 PM EST (03:34 UTC) Moonrise 12:00PMMoonset 12:49AM Illumination 63% Phase: Waxing Gibbous; Moon at 9 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
ANZ631 Chesapeake Bay From Windmill Point To New Point Comfort Va- 927 Pm Est Thu Jan 21 2021
.small craft advisory in effect from Friday evening through Saturday morning...
Overnight..W winds 10 to 15 kt. Waves 1 to 2 ft.
Fri..W winds 10 to 15 kt. Waves 1 foot.
Fri night..NW winds 10 to 15 kt, increasing to 15 to 20 kt in the late evening and overnight. Waves 3 to 4 ft.
Sat..NW winds 15 to 20 kt, increasing to 20 to 25 kt late in the morning, then diminishing to 15 to 20 kt in the afternoon. Waves 3 to 4 ft.
Sat night..NW winds 15 to 20 kt, diminishing to 10 to 15 kt late. Waves 3 to 4 ft.
Sun..NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Waves 2 to 3 ft, subsiding to 1 foot in the afternoon.
Sun night..SW winds 5 to 10 kt. Waves 1 foot.
Mon..S winds 5 kt, becoming E in the afternoon. Waves 1 foot. Rain.
Mon night..NE winds 10 kt. Waves 1 to 2 ft. Rain likely.
ANZ600 927 Pm Est Thu Jan 21 2021
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 weak cold front from an area of low pressure in se canada tracks over the local waters this evening. Canadian high pressure builds in from the northwest over the weekend. Another low pressure system approaches the area early next week.


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


Area Discussion for - Wakefield, VA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KAKQ 220236 AFDAKQ

AREA FORECAST DISCUSSION National Weather Service Wakefield VA 936 PM EST Thu Jan 21 2021

SYNOPSIS. Dry and not as cold tonight. Another dry frontal passage will usher in cold Canadian high pressure from the northwest over the upcoming weekend.

NEAR TERM /THROUGH FRIDAY NIGHT/. As of 935 PM EST Thursday .

Late this evening, strong low pressure was over SE Canada, with sfc high pressure building into the nrn Plains. In WNW flow aloft, high clouds were streaming from the TN valley eastward across NC and the srn third of VA. Temps ranged from the mid 30s into the mid 40s.

Due to continued high clouds overnight, the sky will range from clear or mostly clear across the nrn half of the area, to partly cloudy across extrm srn VA and NE NC. Lows will range through the 30s.

Continued dry on Friday with winds turning westerly/downslope. Went a few degrees above guidance for high temps after collaboration with neighboring offices, highs in the mid to upper 50s with a few low 60s possible in NE NC. Highs only in the low 50s for the eastern shore with westerly winds over the cooler Ches Bay waters. A dry cold front is still expected to cross the region Friday night with cold high pressure building into the region for the weekend. Gusty winds Friday night will keep temps from falling too far but overnight lows still fall into the mid 20s to low 30s NW-SE.

SHORT TERM /SATURDAY THROUGH SUNDAY/. As of 350 PM EST Thursday .

Dry air filters into the area on Saturday with conditions remaining breezy through the afternoon. High temps will struggle to get into the 40s across the northern counties with low and mid 40s to the south. High pressure overhead will allow winds to fully decouple Saturday night and with clear skies and dry air in place, lows tumble into the upper teens and low 20s for most of the area with a few mid 20s SE.

High pressure begins to move offshore on Sunday with southerly return flow setting up ahead of the next approaching system. High temps will remain seasonably cool in the low to mid 40s with clouds increasing from north to south through the day.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. As of 430 PM EST Thursday .

The storm system moving in for Monday looks to be more rain than anything else. Precip might start off as light snow or sleet Monday morning, but warm air moves in aloft as the surface begins to "warm" into the 30s shortly after sunrise Monday. GFS is hinting that a wedge may develop across the VA Piedmont as steady rain moves in Monday morning. Freezing rain is possible for most of the day on Monday for Louisa, Fluvanna, and western Goochland counties with temperatures hovering around 32F and significant warm air aloft (~40F between 3000ft and 4000ft agl). For the rest of the area, Monday will be a cold and wet day with temperatures in the upper 30s to low 40s.

As the low pressure moves off the coast Tuesday morning and a strong area of high pressures moves in, there may be a chance to see scattered rain/sleet/snow showers across central VA and MD with temperatures in the low 30s. High pressure builds in for Tuesday evening and Wednesday. High temperatures on Tuesday will be tricky. ECMWF keeps a cold front west of the area Tuesday with temperatures reaching the mid 50s. While the GFS brings the cold air in faster with highs in the low 40s.

Cold air will be in place Wednesday night with high pressure (~1040mb) centered near the Hudson Bay and extending south into the area. I went a little lowers than guidance for temperatures Wednesday morning. Lows in the low to mid 20, possible could be as low as the upper teens west of I-95.

Dry weather for Wednesday day with high pressure over the area. Highs are expected to be in the upper 30s to low 40s. Next storm systems approaches the area from the southwest bring a treat of accumulating snow for Thursday.

AVIATION /03Z FRIDAY THROUGH TUESDAY/. As of 655 PM EST Thursday .

VFR conditions will prevail at the TAF sites this evening into Fri evening, with just SCT-BKN CI expected. SW or W winds less than 10 kt tonight into Fri morning, then W winds 10-12 kt with gusts up to 20 kt from late Fri morning through much of Fri aftn.

Outlook: High pressure will build into and over the region for Fri night into Sun. Gusty NW winds expected on Sat, with the highest along the coast. Low pressure is expected to cross the region early next week, with Sub-VFR conditions likely.

MARINE. As of 350 PM EST Thursday .

This afternoon, winds are generally SW 10 to 15 kt. An area of low pressure in SE Canada tracks well to our north through early tonight. A weak trailing cold front from that low will track over the local waters from W to E this evening into early tonight. Behind the cold front, winds will become W around 15 kt over the Bay and rivers and 15-20 kt over the coastal waters. Winds may occasionally gust to 18-20 kt over the Bay, particularly in the 03-06z timeframe immediately behind the FROPA, but this is expected to be short lived with low confidence. Therefore, will refrain from issuing a SCA for this surge, although a MWS may be needed in future updates.

Winds remain steady through Friday morning before gradually shifting to WNW and diminishing to 10 to 15 kt Friday afternoon. Another cold front pushes from NW to SE over the local waters Friday evening/Friday night. This reinforcing cold front brings with it stronger CAA along with a tightening pressure gradient from the interaction between low pressure moving off the NE coast and a strong area of high pressure building SE into the Ohio Valley. This will lead to a period SCAs Friday night through at least Saturday and perhaps through Saturday night due to NW winds 18-25 kts in the Bay and 20-25 kts over the coastal waters with gusts 25 to 30 kts (some gusts to 34 kt will be possible on Saturday over the coastal waters). Winds subside Saturday night as high pressure builds into the local area from the NW.

Low pressure is expected to track across the Mid-Atlantic from Monday night/Tuesday with another potential low pressure system late next week. There is still too much uncertainty with respect to the exact track/strength of these lows, but at least a couple periods of SCAs are likely next week.

AKQ WATCHES/WARNINGS/ADVISORIES. MD . None. NC . None. VA . None. MARINE . Small Craft Advisory from 10 PM Friday to 7 AM EST Saturday for ANZ630>632-634>638-650-652-654.

SYNOPSIS . RHR NEAR TERM . RHR/TMG SHORT TERM . RHR LONG TERM . CP AVIATION . TMG MARINE . RMM


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
RPLV2 - 8632837 - Rappahannock Light, VA 6 mi65 min WSW 12 G 12
YKRV2 - 8637611 - York River East Rear Range Light, VA 24 mi65 min W 14 G 15 47°F
WAHV2 - 8631044 - Wachapreague, VA 24 mi65 min W 2.9 G 5.1 42°F 44°F
44072 26 mi45 min NNW 9.7 G 12 46°F
KPTV2 - 8632200 - Kiptopeke, VA 28 mi65 min W 8 G 9.9 45°F
YKTV2 - 8637689 - Yorktown, VA 30 mi65 min W 11 G 13 49°F 44°F
YRSV2 - Chesapeake Bay,VA 32 mi65 min WSW 1.9 46°F 1007 hPa31°F
44042 - Potomac, MD 34 mi41 min W 7.8 G 7.8 45°F 42°F1006.8 hPa
LWTV2 - 8635750 - Lewisetta, VA 35 mi65 min W 8.9 G 9.9 47°F 40°F
CHBV2 37 mi65 min W 15 G 16 47°F
44087 37 mi39 min 44°F1 ft
DOMV2 - 8638511 - Dominion Terminal Association, VA 44 mi65 min WSW 8 G 9.9 46°F
CHYV2 - 8638999 - Cape Henry, VA 44 mi65 min WSW 9.9 G 12 48°F
SWPV2 - 8638610 - Sewells Point, VA 44 mi65 min 44°F
PPTM2 - 8578240 - Piney Point, MD 45 mi65 min W 8 G 9.9
44089 45 mi39 min 45°F2 ft
BISM2 - 8571421 - Bishops Head, MD 46 mi65 min WSW 8.9 G 8.9 44°F 42°F
CRYV2 - 8638595 - South Craney Island, VA 48 mi65 min WSW 5.1 G 6 44°F

Wind History for Rappahannock Light, VA
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last
24hr
NW7
E7
E8
E7
E7
E7
E10
SE10
S12
SW12
SW16
S14
G17
S16
S15
SW13
G16
S11
S11
S8
S9
S10
SW10
SW10
SW13
SW13
1 day
ago
SE2
S1
S4
SW7
S7
SW10
SW12
SW17
W22
W24
W21
NW12
G15
NW17
NW18
NW21
NW19
NW17
G22
N17
NW20
NW17
G21
NW14
N15
N12
N9
2 days
ago
NW17
NW13
W10
W9
SW13
W14
W18
W12
G15
SW13
G17
SW15
SW16
SW15
SW12
S13
S13
S11
SW2
NW8
W3
S3
NE4
E4
SE8
SE6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Melfa / Accomack Airport, VA20 mi40 minWSW 710.00 miFair38°F32°F79%1006.4 hPa

Link to 5 minute data for KMFV

Wind History from MFV (wind in knots)
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hr----CalmCalmCalm--SE4S3S6SW5SW9S7SW9SW10
G14
SW10
G15
W11W7SW7SW4--CalmSW4SW4W8
1 day ago--CalmCalmS4--SW5SW5W10
G17
W12
G18
W16
G24
NW8
G15
NW14
G22
NW15
G30
NW19
G26
NW14
G24
NW20
G27
N11
G23
N9
G18
NW9
G16
NW8N6----Calm
2 days agoW13NW6W3W4W4W7W8W4SW5SW6SW9W13
G20
SW12
G18
SW12
G18
SW13
G16
SW8W8W4--CalmCalmSE3S3SE3

Tide / Current Tables for Windmill Point Light, Chesapeake Bay, Virginia
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Windmill Point Light
Click for Map
Thu -- 12:49 AM EST     Moonset
Thu -- 04:47 AM EST     0.88 feet High Tide
Thu -- 07:16 AM EST     Sunrise
Thu -- 11:29 AM EST     0.15 feet Low Tide
Thu -- 12:00 PM EST     Moonrise
Thu -- 04:58 PM EST     0.76 feet High Tide
Thu -- 05:17 PM EST     Sunset
Thu -- 11:27 PM EST     0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.10.30.50.70.80.90.80.70.50.40.20.20.20.30.40.60.70.80.70.60.50.30.20.1

Tide / Current Tables for Windmill Point, Rappahannock River, Virginia (3)
   EDIT      (on/off)   Help   One Week of Data
Windmill Point
Click for Map
Thu -- 12:49 AM EST     Moonset
Thu -- 04:55 AM EST     1.05 feet High Tide
Thu -- 07:16 AM EST     Sunrise
Thu -- 11:36 AM EST     0.18 feet Low Tide
Thu -- 12:00 PM EST     Moonrise
Thu -- 05:06 PM EST     0.91 feet High Tide
Thu -- 05:17 PM EST     Sunset
Thu -- 11:34 PM EST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.10.30.60.81110.90.70.50.30.20.20.30.50.70.80.90.90.70.60.40.20.1

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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 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.