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Marine Weather and Tides George Mason, VA Version 3.4

NOTICE 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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 7:16AM

Sunset 4:49PM

Thursday December 12, 2019 2:02 AM EST (07:02 UTC)

Moonrise 5:24PM

Moonset 7:35AM

Illumination 100%

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.

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7 Day Forecast for Marine Location Near George Mason, VA

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Area Discussion for - Baltimore, MD/Washington

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FXUS61 KLWX 120241 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 941 PM EST Wed Dec 11 2019

SYNOPSIS. A strong area of high pressure, originating from Canada, will build overhead tonight before shifting to our northeast tomorrow. Meanwhile, an area of low pressure will develop over the Gulf of Mexico Friday and track north across the eastern United States as high pressure departs offshore. Low pressure will then move across the area Saturday, with another area of low pressure approaching Monday into Tuesday.

NEAR TERM /THROUGH THURSDAY/. Strong high pressure will build overhead tonight. With the high originating from Canada, the air mass is quite chilly, with temperatures generally 10 degrees below normal or so. Low temperatures overnight will dip down into the 20s, with the normal colder spots getting into the teens.

With high pressure shifting to our northeast tomorrow, temperatures will remain cool, with highs in the mid 30s to low 40s. No precipitation to speak of though, and winds will be light, so wind chills won't be an issue. Overall, a dry and chilly day across the area.

SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/. High pressure will slide offshore Thursday night, as low pressure develops along the Gulf Coast and heads north toward the region. A wedge of cold air will remain through much of Friday morning, especially in the valleys west of the Blue Ridge. This could create some problems with freezing rain at the onset of the event Friday morning, when warm advection precipitation is likely to begin across the area. The most significant risk of freezing rain appears to be along the I-81 and I-64 corridors, where the precipitation arrives earlier and the cold air lingers the longest. Farther north and east of these areas, thinking that surface temperatures should warm just quick enough to avoid any major issues, but certainly can't rule out some light accumulations north and east of I-64. Right now, generally thinking this will be a light event, with less than a tenth of an inch along the I-81 and I-64 corridors, and perhaps a couple hundredths farther north and east, if conditions line up just right.

Outside of the freezing rain threat comes a soaking rain event areawide starting Friday night, as low pressure moves over the area. Temperatures may actually rise overnight in some spots, but most locations should stay in the 30s and 40s.

LONG TERM /SATURDAY THROUGH WEDNESDAY/. Low pressure overhead Saturday will move off to the north later Saturday morning and afternoon. A soaking rain will be around to start, but a dry slot will work its way into the area during this time, and this may cause a lull in the precipitation. Confidence in timing the lull of precipitation remains low at this time. A second round of precipitation will be possible Saturday evening into early Sunday morning due to forcing by the upper level low passing over our area and the surface low's associated cold front. Some upslope wintry precipitation can be ruled out over and along the higher elevations.

High pressure will build back into our region Sunday through early Monday morning. Clear skies along with cooler temperatures in the mid 40s during the day and the 20s and 30s overnight. A warm front is forecast to lift through our region Monday morning. Overruning precipitation will be possible as this frontal boundary moves through our region. As high pressure is in place over the Northeast US, models have been hinting at a cold air damming situation. As the warm front lifts through our area, this precipitation could potentially fall as wintry precipitation. We will need to continue to track the model trend. Models have the damming setup breaking early Tuesday as the main cold front moves through our area. A brief warm up into the 40s will lead to rain Tuesday afternoon. It looks like the cold front is forecast to fully move through our area by Tuesday evening with cooler temps building back into our area Tuesday overnight into Wednesday.

AVIATION /02Z THURSDAY THROUGH MONDAY/. VFR conditions will continue overnight tonight, with a light wind out of the WNW. VFR conditions will persist tomorrow, with mostly sunny skies and light winds.

A low pressure system will track near our area Friday through Saturday. Showers are expected on Friday, and could lead to sub-VFR conditions. Rain should become steadier Friday Night through early Saturday morning and will likely cause sub-VFR conditions. Rain should dissipate late Saturday into early Sunday. Some showers can't be ruled out with brief restrictions on Sunday, but prevailing VFR conditions expected on Sunday at this time.

MARINE. Small Craft Advisory remains in effect for much of the Bay and the lower Tidal Potomac. Winds will gradually subside overnight, so will keep with the previous Small Craft Advisory for the central Bay and lower Tidal Potomac into Thursday morning.

As coastal low passes near our area, winds will likely reach Small Craft Advisory levels Saturday and Sunday. Small Craft Advisories will likely be needed this weekend.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until midnight EST tonight for ANZ531>533- 538>541. Small Craft Advisory until noon EST Thursday for ANZ534-537- 543.

SYNOPSIS . CJL/KJP NEAR TERM . CJL/KJP SHORT TERM . CJL/KJP LONG TERM . BJL/JMG AVIATION . CJL/KJP/JMG MARINE . CJL/KJP/JMG

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WASD2 - 8594900 - Washington, DC	15 mi	44 min	NW 6 G 9.9	35°F	44°F		1036.7 hPa
BSLM2 - Chesapeake Bay, MD	32 mi	152 min	Calm	31°F			1035 hPa	19°F
NCDV2	39 mi	50 min	NNW 6 G 9.9	34°F	48°F		1035 hPa
APAM2 - 8575512 - Annapolis, MD	45 mi	44 min		31°F			1035.8 hPa
44063 - Annapolis	46 mi	26 min	WNW 5.8 G 5.8	33°F	45°F		1036.9 hPa
TPLM2 - Thomas Point, MD	46 mi	62 min	W 9.9 G 11	34°F	45°F		1036.9 hPa (+1.8)	17°F
BLTM2 - 8574680 - Baltimore, MD	48 mi	50 min	W 1.9 G 2.9	32°F	46°F		1035.8 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	49 mi	44 min	W 8.9 G 11	33°F			1036.3 hPa

Wind History for Washington, DC

(wind in knots)    EDIT      (on/off)   Help

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Last 24hr

NW5 G8

NW10 G18

NW7 G11

NW7 G11

NW7 G12

W6 G10

NW5 G8

NW9 G13

NW8 G15

NW9 G13

NW10 G17

NW8 G12

NW7 G10

NW7 G11

W5 G12

W3

NW4 G10

NW8

NW7 G14

NW7 G12

NW7

NW4

NW4 G10

NW5 G9

1 day ago

S10 G15

S11

S10 G15

S7 G11

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S5

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S8 G12

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SW5 G10

S3

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NW7 G10

NW3

NW6 G13

NW7 G14

NW7 G21

NW10 G15

NW5 G10

NW8 G12

NW10 G15

NW9 G15

N4 G13

2 days ago

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S2

S3

S4 G7

S6

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S6 G9

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S8 G11

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S7

S9 G12

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S8 G11

S8 G12

SW10 G14

S10

S11 G15

S9 G12

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Fort Belvoir, VA	10 mi	66 min	WNW 11	10.00 mi	Fair	31°F	17°F	57%	1036.2 hPa
Washington/Dulles International Airport, DC, VA	11 mi	70 min	S 3	10.00 mi	Partly Cloudy	28°F	17°F	63%	1036.3 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA	14 mi	66 min	N 0	10.00 mi	A Few Clouds	28°F	19°F	69%	1037.3 hPa
Washington/Reagan National Airport, DC, VA	14 mi	70 min	Var 4	10.00 mi	Fair	34°F	17°F	50%	1036.3 hPa
Leesburg / Godfrey, VA	22 mi	67 min	N 0	10.00 mi	Partly Cloudy	30°F	21°F	69%	1036.2 hPa
College Park Airport, MD	22 mi	66 min	WNW 4	10.00 mi	Fair	32°F	12°F	44%	1036.2 hPa
Camp Springs / Andrews Air Force Base, MD	23 mi	66 min	NW 9	10.00 mi	Fair	30°F	16°F	56%	1036.2 hPa
Quantico Marine Corps Airfield - Turner Field, VA	23 mi	66 min	NE 3	10.00 mi	Fair	35°F	17°F	48%	1036.8 hPa
Gaithersburg - Montgomery County Airport, MD	24 mi	66 min	WNW 4	10.00 mi	Fair	28°F	17°F	63%	1037.6 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)

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NW8

NW18 G25

NW6

NW14

NW8

W5

NW6

NW13

NW10 G20

NW9 G16

NW12

W8 G16

N5

W6

W5

Calm

Calm

Calm

Calm

NW12 G19

NW11 G18

NW4

NW12 G14

NW11

1 day ago

S5

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Calm

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W3

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NW14 G18

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NW12 G21

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NW13 G19

2 days ago

SE3

NW4

Calm

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SE3

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S3

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Calm

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S7

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S5

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Tide / Current Tables for Chain Bridge, one mile below, D.C.

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Tide / Current Tables for Chain Bridge, D.C.

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Weather Map

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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

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Wind Forecast for Baltimore, MD/Washington (2,6,7,8)

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Ground Weather Radar Station Sterling, VA

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