Tuesday, June15, 2021
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Marine Weather and Tides
Woodbridge, VA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:42AMSunset 8:36PM Tuesday June 15, 2021 12:23 AM EDT (04:23 UTC) Moonrise 9:20AMMoonset 11:42PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 1136 Pm Edt Mon Jun 14 2021
.small craft advisory in effect through Tuesday afternoon...
.severe Thunderstorm watch 273 in effect until 2 am edt Tuesday...
Rest of tonight..W winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with isolated tstms late this evening, then scattered showers.
Tue..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..NW winds 5 kt. Waves less than 1 ft.
Wed night..NW winds around 5 kt. Waves 1 ft.
Thu..NW winds 5 kt. Waves less than 1 ft.
Thu night..W winds around 5 kt. Waves 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..W winds 5 to 10 kt. Waves 1 ft. Scattered showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1136 Pm Edt Mon Jun 14 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A series of cold fronts will cross the region through early Wednesday. High pressure will return later in the week. Small craft advisories may be needed Friday afternoon into the weekend.


7 Day Forecast for Marine Location Near Woodbridge, VA
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location: 38.65, -77.22     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 150327 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1127 PM EDT Mon Jun 14 2021

SYNOPSIS. A series of cold fronts will move through the area through mid week. Canadian high pressure will build overhead for much of the second half of the week. Another cold front may approach the area early next week.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. A Severe Thunderstorm Watch is in effect until 2AM for central and southern Maryland east of Interstate 95 as well as King George County in Virginia. Previous discussion follows.

A relative min in CAPE has caused lower confidence for locations west of the Blue Ridge Mountains, but a few severe storms are possible this evening due to stronger shear and a boundary dropping in from the north. However, confidence increases for locations east of the Blue Ridge Mountains this evening due to higher amounts of instability. The surface flow has backed to the south ahead of the approaching boundary, and this has caused a southerly flow to increase dewpoints this evening. At the same time, a bay breeze can be seen on radar retrograding west while the boundary from the convection upstream is dropping south. The intersecting boundaries, strong shear around 50 kts, and increasing CAPE suggests that some storms will be severe, with discrete supercells possible. Damaging winds and large hail are the primary threats, but an isolated tornado cannot be ruled out as the low-level shear increases some near the bay breeze and around intersecting boundaries.

A low-end threat for flash flooding persists, especially across the Washington Metro area where convection will be more widespread and co-located with lower FFG. A Flash Flood Watch has been issued for this area. Elsewhere, higher FFG along with a faster storm motion means that confidence is too low for a Flash Flood Watch at this time.

Convection should gradually dissipate late this evening into the overnight as the cold front drops farther south and drier air advects in from the northwest.

SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/. A mid-level trough and associated cold front will move through the CWA Tuesday. This frontal passage will be notably drier, but cannot rule out a few showers with the relatively higher chance (still isolated in nature) up near the Mason-Dixon line. High temperatures Tuesday do look to be about 5 degrees cooler than today and closer to seasonal normals.

Dry and clear Tuesday night with temperatures dipping into the mid 40s across the Allegheny Front. As Canadian high pressure builds in Wednesday, the main story will be the below normal temperatures and low humidity values. The immediate metropolitan areas have the best chance of breaking 80, with the higher elevations out west not making it out of the 60s. Most locations will be in the low to mid 70s.

Come Wednesday night, there could be a few locations that make a run into the upper 30s, mainly across the valleys in the higher terrain of Garrett, western Grant, western Pendleton, and western Highland. Outside of the higher terrain, it will be a good night to open the windows and let in some cool air with low humidity.

LONG TERM /THURSDAY THROUGH MONDAY/. Generally good agreement amongst guidance in regards to the long term period. A deep upper level trough will continue to pivot eastward on Thursday. However, with the trough axis offshore, we'll be under general subsidence, resulting in surface high pressure over the Ohio Valley becoming focused over the region through the end of the week. Seasonably cooler conditions with temperatures in the upper 70s are expected coupled with low humidity. The high will then continue to shift offshore on Friday, inducing a southerly flow which will bring the return of heat and humidity back to the region.

Guidance solutions diverge somewhat in regards to the timing of the next FROPA on Saturday. The ECMWF is a bit earlier than the GFS which would greatly determine how much convective activity develops. There's also question into the progression of the front as some of the guidance including their ensembles indicate the front stalling across the CWA Sunday. If that's the case, then potential for more unsettled weather is possible on Sunday into Monday. Guidance redevelops a Bermuda high just to our east by early next week, thus could see this situation play out correctly. Another area of low pressure may then traverse along said stalled boundary which would set us up for additional unsettled weather in terms of showers and thunderstorms, even the potential for isolated flooding. Will need to monitor trends over the next few days.

AVIATION /04Z TUESDAY THROUGH SATURDAY/. Some storms across the eastern terminals may be severe with locally damaging wind gusts and large hail being the primary threats. The best chance for strong to severe storms will be through 04z across IAD, DCA, BWI, and MTN. A brief period of MVFR cigs/vsbys are possible overnight, but drier air should allow for VFR conditions most of the time.

Another cold front is expected to push through the region on Tuesday. However that front lacks and significant moisture. Therefore, conditions should remain VFR throughout. High pressure returns for Wednesday and continues through Friday under a westerly flow.

MARINE. SMWs will likely be needed tonight as thunderstorms move across the waters. The most likely time window for storms to move across the waters will be through 2 AM. A Small Craft Advisory is in effect tonight through tomorrow. South to southwest winds this evening will turn northwesterly behind the front later tonight through tomorrow. Northwesterly flow will continue on Wednesday, but winds are expected to be sub- SCA in nature

Generally lighter NW flow thereafter through Thursday night (though another mainly dry front may kick winds up a bit Tuesday night into Wednesday).

Small Craft Advisory conditions are likely Fri afternoon into Sunday.

TIDES/COASTAL FLOODING. Elevated water levels are expected tonight into Tuesday morning, but the flow will turn northwest during this time, so confidence in minor tidal flooding is low.

LWX WATCHES/WARNINGS/ADVISORIES. DC . Flash Flood Watch until 2 AM EDT Tuesday for DCZ001. MD . Flash Flood Watch until 2 AM EDT Tuesday for MDZ013-014-016- 504. VA . Flash Flood Watch until 2 AM EDT Tuesday for VAZ053-054. WV . None. MARINE . Small Craft Advisory until 4 PM EDT Tuesday for ANZ530>543. Flash Flood Watch until 2 AM EDT Tuesday for ANZ535.

SYNOPSIS . KJP NEAR TERM . BJL/KJP SHORT TERM . KJP LONG TERM . MSS AVIATION . BJL/MSS/KJP MARINE . BJL/MSS/KJP TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 19 mi53 min N 4.1 G 7 68°F 77°F1009.2 hPa
NCDV2 25 mi53 min SSW 2.9 G 4.1 77°F 77°F1006.4 hPa
BSLM2 - Chesapeake Bay, MD 29 mi53 min NNE 5.1 68°F 1009 hPa63°F
44062 - Gooses Reef, MD 43 mi47 min S 12 G 14 73°F 74°F1 ft1008.9 hPa
TPLM2 - Thomas Point, MD 45 mi83 min NW 14 G 19 73°F 73°F1009.8 hPa (+2.3)
44063 - Annapolis 46 mi47 min N 9.7 G 18 64°F 74°F2 ft1010.4 hPa
APAM2 - 8575512 - Annapolis, MD 46 mi53 min WNW 13 G 15 68°F 77°F1009.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi53 min SSE 8.9 G 9.9 75°F 1007.1 hPa
SLIM2 - 8577330 - Solomons Island, MD 47 mi53 min S 4.1 G 7 76°F 77°F1007.1 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA6 mi27 minN 010.00 miPartly Cloudy68°F65°F91%1009 hPa
Quantico Marine Corps Airfield - Turner Field, VA11 mi27 minN 89.00 miMostly Cloudy73°F64°F74%1008.8 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA17 mi27 minNNW 310.00 miLight Rain68°F65°F90%1009.5 hPa
Washington/Reagan National Airport, DC, VA18 mi31 minNE 91.50 miThunderstorm Heavy Rain67°F65°F93%1008.6 hPa
Stafford, Stafford Regional Airport, VA21 mi28 minNNW 1110.00 miFair74°F62°F66%1009.8 hPa
Camp Springs / Andrews Air Force Base, MD22 mi27 minN 63.00 miThunderstorm Rain65°F63°F91%1009.6 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrSE5SE3SE3SE3CalmCalmCalmSE5S4S3S4SW3W6W4SW5SW4S6SE5SE4SE5SE4SW5N7
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1 day agoCalmCalmCalm--CalmCalmCalmCalmCalmS6S6SW8S6SE4CalmS3SE6SE5SE5--SE5SE6SE5Calm
2 days agoCalmCalmCalmN3N3N3N4N5CalmN3NE3NW3CalmCalmCalmN3E4SE7CalmCalmCalmCalmCalmCalm

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Tue -- 12:08 AM EDT     Moonset
Tue -- 05:06 AM EDT     0.35 feet Low Tide
Tue -- 05:43 AM EDT     Sunrise
Tue -- 10:19 AM EDT     Moonrise
Tue -- 10:52 AM EDT     1.80 feet High Tide
Tue -- 05:55 PM EDT     0.24 feet Low Tide
Tue -- 08:35 PM EDT     Sunset
Tue -- 11:35 PM EDT     1.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.20.90.70.40.40.40.611.41.71.81.71.41.10.80.50.30.20.30.611.41.6

Tide / Current Tables for Deep Point, Mattawoman Creek, Maryland
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Deep Point
Click for Map
Tue -- 12:08 AM EDT     Moonset
Tue -- 04:56 AM EDT     0.35 feet Low Tide
Tue -- 05:44 AM EDT     Sunrise
Tue -- 10:19 AM EDT     Moonrise
Tue -- 10:42 AM EDT     1.83 feet High Tide
Tue -- 05:45 PM EDT     0.24 feet Low Tide
Tue -- 08:34 PM EDT     Sunset
Tue -- 11:25 PM EDT     1.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.20.90.60.40.40.40.71.11.51.81.81.71.410.70.40.30.20.40.71.11.51.6

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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