Thursday, April2, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Brookmont, MD

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 6:48AMSunset 7:34PM Thursday April 2, 2020 6:33 AM EDT (10:33 UTC) Moonrise 12:13PMMoonset 2:28AM Illumination 69% 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
ANZ535 Tidal Potomac From Key Bridge To Indian Head- 439 Am Edt Thu Apr 2 2020
.small craft advisory in effect from 10 am edt this morning through this evening...
.small craft advisory in effect from Friday morning through Friday afternoon...
Rest of the overnight..NW winds 5 kt. Waves less than 1 ft.
Today..NW winds 10 to 15 kt with gusts to 30 kt. Waves 1 to 2 ft.
Tonight..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Fri..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Fri night..N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft.
Sat..N winds around 5 kt. Waves 1 ft.
Sat night..Light winds. Waves 1 ft or less.
Sun..W winds around 5 kt. Waves 1 ft.
Mon..S winds around 5 kt. Waves 1 ft.
ANZ500 439 Am Edt Thu Apr 2 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will loop over the northwestern atlantic ocean through Friday. High pressure will gradually build in from the midwest through the weekend. A cold front will follow Sunday night, then stall nearby before returning north as a warm front early next week. Small craft advisories may need to be extended into Friday evening for portions of the waters.


7 Day Forecast for Marine Location Near Brookmont, MD
   Hourly   EDIT   Help
location: 38.92, -77.1     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 020740 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 340 AM EDT Thu Apr 2 2020

SYNOPSIS. Low pressure will loop over the northwestern Atlantic Ocean through Friday. High pressure will gradually build in from the Midwest through the weekend. A cold front will follow Sunday night, then stall nearby before returning north as a warm front early next week.

NEAR TERM /THROUGH TONIGHT/. A large and deep area of low pressure will be the main driver of the weather locally today, despite its location several hundred miles offshore. A thin scattered to broken deck of stratocumulus clouds will likely develop today over northern Virginia and central Maryland closer to the low, with a mostly sunny start becoming partly to mostly cloudy for a time this afternoon. Elsewhere, mainly sunny skies should prevail.

Northwesterly winds will gust 30 to 35 MPH at times today. 850 mb temperatures around 0 C with steep low-level lapse rates and downsloping flow should result in highs of 55-60 F, perhaps a touch warmer over central Virginia.

Sustained winds of 15-20 MPH and relative humidity dropping to ~30- 35% this afternoon could result in some enhanced potential for fire spread, but recent rainfall likely keeps the threat marginal for most of the area.

Breezy and dry conditions will continue overnight with lows in the upper 30s to lower 40s.

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. Dry and breezy conditions are expected on Friday. Clouds will increase further Friday evening as the spiraling offshore low makes its closest approach. A few high resolution models develop a few showers over portions of northeastern Maryland and near the Chesapeake Bay, but would rather defer to later forecasts before including any rain chances given dry northwesterly winds.

The low will move out to sea Saturday leaving lighter winds and warmer temperatures in its wake. Clouds will increase Saturday night in advance of a cold front approaching from the Midwest.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. There will be a ridge axis overhead Sunday that global models hold through Monday. A weakening front may bring a few showers Sunday with only trace or light rainfall amounts. Heights aloft will begin to fall during the middle and second half of next week as very deep upper low for this time of the year evolves over the region south of James Bay. Lots of spread shown amongst the global models with amplitude, placement, and timing of the associated trof axis moving through the local area. Expect a cooling trend, potentially significant with potential for freeze, toward the end of next week if the more amplified Euro solution pans out. Given the more dominant northern stream, don't expect a lot precip with the associated frontal passage.

AVIATION /08Z THURSDAY THROUGH MONDAY/. VFR conditions are expected through the TAF period. Scattered to broken stratocumulus are likely around FL050 between 15Z and 23Z. Northwesterly winds 15G25kts are expected, peaking this afternoon with a few gusts in excess of 30 knots possible.

Winds will abate a bit tonight, then increase again Friday. Lighter winds and continued VFR conditions are expected Saturday. No significant weather is expected Sunday through Monday.

MARINE. Northwesterly winds will remain gusty through Friday. Gusts of 25 to 30 knots are possible at times, particularly during the afternoon hours for near shore waters and overnight for the wider waters. A few gusts near gale force are possible early Friday morning. Winds will become lighter Friday night into Saturday under high pressure. Fair weather conditions are expected Sunday and Monday.

TIDES/COASTAL FLOODING. Water levels are decreasing early this morning. This should keep tides below minor flooding thresholds today. Northwest flow will continue to cause water levels to decrease to near or below astronomical normals through Friday. Tides may increase rather sharply this weekend as onshore flow returns and any excess water left near the mouth of the Chesapeake Bay surges northward.

FIRE WEATHER. Sustained winds of 15 to 25 MPH with gusts of 30 to 35 MPH are likely across much of the area this afternoon. The lowest relative humidity values (25 to 35 percent) are expected over Virginia. Recent rainfall should keep the threat for fire spread relatively low, but trends will need to be monitored for a potential Special Weather Statement this afternoon. Similar conditions (slightly drier, but also slightly weaker winds) are possible again Friday afternoon, particularly over the central Shenandoah Valley into central Virginia Piedmont.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 PM EDT Friday for ANZ530>534- 536>543. Small Craft Advisory from 10 AM this morning to 8 PM EDT this evening for ANZ535. Small Craft Advisory from 6 AM to 6 PM EDT Friday for ANZ535.

SYNOPSIS . DHOF NEAR TERM . DHOF SHORT TERM . DHOF LONG TERM . LFR AVIATION . LFR/DHOF MARINE . LFR/DHOF TIDES/COASTAL FLOODING . DHOF FIRE WEATHER . DHOF


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
WASD2 - 8594900 - Washington, DC 5 mi63 min NW 5.1 G 8 44°F 55°F1013.5 hPa
BSLM2 - Chesapeake Bay, MD 23 mi123 min NW 1.9 1012 hPa
APAM2 - 8575512 - Annapolis, MD 33 mi63 min 43°F 1011.9 hPa
TPLM2 - Thomas Point, MD 35 mi33 min W 16 G 18 44°F 50°F1013.2 hPa (+0.0)24°F
BLTM2 - 8574680 - Baltimore, MD 37 mi63 min NW 5.1 G 9.9 43°F 52°F1012 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 37 mi63 min WNW 13 G 15 44°F 1012.1 hPa
FSNM2 37 mi63 min WNW 14 G 18 44°F 1011.9 hPa
CPVM2 38 mi63 min 44°F
NCDV2 42 mi63 min NW 2.9 G 4.1 44°F 56°F1012.7 hPa
44062 - Gooses Reef, MD 44 mi45 min NW 16 G 19 47°F

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
N4
G13
N6
G10
NE3
G10
N5
G9
N7
G11
N8
G11
N4
G11
NW5
G8
NW8
G13
NW4
G12
W8
G11
NW5
G12
NW3
G8
NW3
NW4
G7
NW4
G7
NW4
G7
NW4
NW4
G7
N5
G11
N6
G11
N6
G12
NW3
NW5
1 day
ago
NW3
G6
NW2
G8
N4
G7
NE1
G6
E2
G6
SE4
G7
E2
NE4
SE3
G6
E3
G6
E7
G13
E4
G8
E4
G10
E5
G12
E3
G6
NE4
G7
E3
G6
E2
G7
E6
G9
NE5
G8
NE4
G9
NE2
G10
N4
G10
N4
G7
2 days
ago
E1
SE1
S6
S6
S8
G11
S8
S10
S10
G16
S11
S2
G6
NW9
G18
NW13
G17
N8
G16
NE6
G12
N4
G12
N4
G9
N4
N3
G6
N4
G7
N6
G14
N4
G9
N6
G12
NW7
NW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Washington/Reagan National Airport, DC, VA6 mi41 minNW 610.00 miFair43°F26°F51%1013.4 hPa
College Park Airport, MD10 mi47 minNW 810.00 miFair42°F20°F42%1012.9 hPa
Camp Springs / Andrews Air Force Base, MD14 mi37 minNW 410.00 miFair42°F24°F50%1013.3 hPa
Fort Belvoir, VA14 mi37 minN 010.00 miFair38°F26°F62%1013.8 hPa
Gaithersburg - Montgomery County Airport, MD17 mi37 minNW 610.00 miFair38°F24°F57%1014.7 hPa
Washington/Dulles International Airport, DC, VA19 mi41 minWNW 610.00 miFair37°F25°F62%1013.5 hPa
Fort Meade / Tipton, MD21 mi48 minWNW 310.00 miFair34°F28°F81%1013.5 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last 24hrN12N14N11N12N11N13N11N15N10NW5NW9
G17
N9N7NW5NW9NW7NW5W4N12N14N12NW6NW9NW6
1 day agoNW8N8N7NE9NE6--NE4E6E5E12E14E12E10E8NE10NE11E12E12NE16NE11NE13N10NE11N15
2 days agoE4S4S7S10S9S11S14
G20
S10S6NW10
G19
N18
G25
N18N10N11N15
G19
N11
G19
N9N14NW12
G20
N11N11N13N7NW9

Tide / Current Tables for Chain Bridge, one mile below, Washington, D.C.
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Reagan National Airport, Washington, D.C.
   EDIT      (on/off)   Help   One Week of Data
Reagan National Airport
Click for Map
Thu -- 03:27 AM EDT     Moonset
Thu -- 03:34 AM EDT     2.87 feet High Tide
Thu -- 06:50 AM EDT     Sunrise
Thu -- 09:49 AM EDT     0.54 feet Low Tide
Thu -- 01:12 PM EDT     Moonrise
Thu -- 03:42 PM EDT     3.21 feet High Tide
Thu -- 07:33 PM EDT     Sunset
Thu -- 11:00 PM EDT     0.51 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
1.21.92.52.82.82.62.11.510.60.50.71.11.92.73.13.232.51.91.30.90.60.5

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



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Sterling, VA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines 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.