Tuesday, January21, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Forest Heights, 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 7:20AMSunset 5:17PM Tuesday January 21, 2020 12:43 PM EST (17:43 UTC) Moonrise 4:35AMMoonset 2:26PM Illumination 13% Phase: Waning Crescent; Moon at 26 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- 939 Am Est Tue Jan 21 2020
Rest of today..N winds 10 kt. Waves 1 ft.
Tonight..N winds 5 kt. Waves less than 1 ft.
Wed..N winds 5 kt. Waves less than 1 ft.
Wed night..N winds around 5 kt. Waves 1 ft or less.
Thu..E winds around 5 kt. Waves flat.
Thu night..Light winds. Waves flat.
Fri..E winds 5 to 10 kt. Waves 1 ft. Rain through the night.
Sat..S winds 5 to 10 kt...becoming w. Waves 1 ft. Rain likely through the day, then a chance of showers through the night.
ANZ500 939 Am Est Tue Jan 21 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build eastward from the mississippi valley through Wednesday, then move offshore during the second half of the week. A low pressure system will approach on Saturday.


7 Day Forecast for Marine Location Near Forest Heights, MD
   Hourly   EDIT   Help
location: 38.83, -77.03     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 211432 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 932 AM EST Tue Jan 21 2020

SYNOPSIS. High Pressure will continue to move eastward from the Mississippi Valley, resulting in dry weather through Wednesday. The high will shift offshore during the second half of the week. Low pressure will approach from the central United States on Saturday.

NEAR TERM /THROUGH TONIGHT/. Strong high pressure located over the mid Mississippi Valley will continue to move eastward through Wednesday, delivering dry weather to the region. Aloft, a positively tilted trough extends across the area to a developing closed low over the Tennessee Valley. There's enough moisture in the trough to result in some spotty flurries west of the Allegheny Front through noon, but with a low Froude number, not expecting much, if anything, to spill into our CWA. Current satellite supports this, as clouds are beginning to thin west of the Allegheny Front. Made minor adjustments to temperatures to reflect current obs. Otherwise, previous forecast remains on track.

PREVIOUS DISCUSSION .

The closed low will dip into the southeastern states through tonight while the surface high will build toward the Ohio Valley. Some mid and high clouds may skirt by this evening, but otherwise skies will be clear. With 925mb temperatures similar to what they were Monday, expect similar high temperatures ranging through the 30s. There will be a bit less wind, though. Dew points will remain in the low to mid teens through tonight, so would expect that to be the bottom threshold for low temperatures, with the most favorable radiational cooling conditions likely in the valleys west of the Blue Ridge. Urbanized areas will be closer to the mid 20s.

SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/. Heights will rise on Wednesday as a ridge axis builds in from the west, and the surface high will move overhead. Both of these features will progress eastward Thursday. Daytime highs will moderate as a result, with upper 30s-mid 40s Wednesday and 40s to near 50 Thursday. Wednesday night will likely still be chilly with a continuation of clear skies and light winds. Mid/high clouds will be increasing Thursday and Thursday night ahead of a trough in the nation's midsection. Combined with rising dew points, Thursday night lows will be a bit warmer in the mid 20s to lower 30s.

LONG TERM /FRIDAY THROUGH MONDAY/. High pressure will be moving to our north on Friday while a mid to upper level trough deepens over the central CONUS, resulting in a mid-level cut-off low. At the surface, low pressure system will develop over the Midwest followed by an ENE track and approaching our region. This will increase the chances of precipitation over our region Friday night as the low pressure moves across the Ohio Valley. This will then develop into a coastal low Saturday into Saturday night. Rain or snow are possible as this system moves across our area between Friday night and Saturday night, with the best chance of any wintry weather west of the Blue Ridge. The low will deepen offshore Saturday night into Sunday, with possible rain and/or snow showers lingering into Sunday. Upslope snow is possible into Monday and remaining dry into Tuesday.

AVIATION /14Z TUESDAY THROUGH SATURDAY/. VFR conditions will continue through Thursday night as high pressure moves across the area. Northwest to north winds will be around 10 kt or less through tonight, then light and variable through Thursday night.

VFR conditions expected Friday with high pressure in control. Sub- VFR conditions could begin Friday night with a low pressure impacting our region and remaining into Saturday night. This system could bring rain and/or snow showers over the terminals (any chance of snow is higher at MRB at this time). A few rain or snow showers could remain into Sunday as winds increase.

MARINE. There are some gusts of 20-25 kt early this morning on waters open to the NNW fetch . generally on waters south of the Bay bridge, though there are a few sporadic reports elsewhere. Should see these winds weaken by midday as the pressure pattern relaxes a bit. However, there may be enough wind in the column to combine with northerly channeling to keep some higher gusts on the wider waters south of Drum Point through tonight, so a Small Craft Advisory will remain in effect for these locations. By Wednesday morning, winds will become lighter as high pressure moves overhead, with such conditions continuing through Thursday night.

Sub-SCA conditions are expected on Friday with high pressure in control. SCA conditions possible Friday night into Sunday with low pressure moving across our area and intensifying offshore.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 1 PM EST this afternoon for ANZ532- 533-541. Small Craft Advisory until 1 AM EST Wednesday for ANZ534-537- 543.

SYNOPSIS . ADS/MSS NEAR TERM . ADS/MSS SHORT TERM . ADS LONG TERM . IMR AVIATION . ADS/IMR MARINE . ADS/IMR


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 3 mi56 min 32°F 41°F1033.6 hPa
BSLM2 - Chesapeake Bay, MD 17 mi134 min N 7 -23°F 1033 hPa
APAM2 - 8575512 - Annapolis, MD 31 mi56 min 30°F 1032.3 hPa
TPLM2 - Thomas Point, MD 32 mi44 min N 12 G 13 29°F 39°F1033.4 hPa (-1.1)12°F
NCDV2 35 mi62 min 31°F 41°F1032.8 hPa
CPVM2 36 mi62 min 29°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 38 mi56 min 29°F 1032.9 hPa
FSNM2 38 mi68 min 29°F 1031.9 hPa
BLTM2 - 8574680 - Baltimore, MD 39 mi62 min 30°F 40°F1032.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 47 mi62 min 29°F 43°F1032.6 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 49 mi62 min 29°F 38°F1033.3 hPa

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last
24hr
N8
G15
N6
G13
N9
G17
NW7
G12
N8
G14
N5
G10
NW7
G12
N6
G10
N4
G10
N3
G7
N3
G12
N6
G13
N4
G13
N5
G9
N4
G9
N5
G10
N2
G9
N4
G8
N5
G9
NW7
G12
N6
G13
N5
G11
NW7
G15
NW5
G11
1 day
ago
NW15
G22
N15
G24
NW14
G21
NW11
G16
NW11
G16
NW7
G12
NW7
G17
NW12
G20
NW9
G19
NW12
G23
NW11
G23
NW11
G19
NW11
G17
NW10
G16
N6
G21
NW6
G17
NW8
NW8
G14
NW9
G12
NW9
G12
NW8
G15
N8
G18
NW10
G17
N7
G17
2 days
ago
SE7
S9
S8
G12
S10
G15
S9
G13
S14
G17
S9
G17
S10
G16
S11
G15
S12
G15
S10
G13
S12
G17
SW9
G12
S8
NW2
SE1
NW4
N2
SE2
SW2
G5
NW12
G16
NW11
G19
NW12
G23
NW11
G19

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, VA2 mi52 minNNW 1210.00 miFair34°F12°F42%1033.4 hPa
Camp Springs / Andrews Air Force Base, MD8 mi1.8 hrsN 1110.00 miFair30°F11°F46%1034.6 hPa
Fort Belvoir, VA11 mi2.8 hrsNW 1010.00 miFair28°F9°F45%1034.9 hPa
College Park Airport, MD12 mi56 minN 610.00 miFair31°F7°F37%1033.2 hPa
Fort Meade / Tipton, MD23 mi56 minN 810.00 miFair32°F14°F47%1033.5 hPa
Gaithersburg - Montgomery County Airport, MD24 mi48 minNW 610.00 miFair31°F15°F52%1034.7 hPa
Washington/Dulles International Airport, DC, VA24 mi52 minN 1110.00 miFair31°F12°F47%1033.6 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)
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
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrN17
G22
N15
G19
N16
G21
N14N13N10N7N6N8N9N11N12N10N8NW9NW8N9N9N11N10NW15N12N11N12
1 day agoNW20
G30
NW20
G29
N21
G28
NW18
G24
NW16
G22
NW10
G18
NW13
G20
NW17
G24
NW12NW12
G22
NW14NW17
G28
NW16
G21
NW16
G20
NW8
G21
NW13
G19
NW9NW11NW13N12NW13N15
G21
N14N18
G22
2 days agoS8S11S11S12S10S13S18
G26
S16
G22
S10S12S13
G22
S19
G24
S14S9NW7CalmS6E3CalmCalmNW7NW11
G18
NW18
G25
NW21
G28

Tide / Current Tables for Bellevue, D.C.
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Bellevue
Click for Map
Tue -- 04:35 AM EST     Moonrise
Tue -- 05:13 AM EST     2.43 feet High Tide
Tue -- 07:22 AM EST     Sunrise
Tue -- 11:40 AM EST     -0.18 feet Low Tide
Tue -- 02:26 PM EST     Moonset
Tue -- 05:16 PM EST     Sunset
Tue -- 05:33 PM EST     2.88 feet High 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
-0.20.20.91.62.22.42.31.81.20.60.2-0.1-0.20.211.82.52.82.82.51.91.40.80.3

Tide / Current Tables for Benning Bridge, D.C.
   EDIT      (on/off)   Help   One Week of Data
Benning Bridge
Click for Map
Tue -- 04:35 AM EST     Moonrise
Tue -- 05:28 AM EST     2.52 feet High Tide
Tue -- 07:22 AM EST     Sunrise
Tue -- 11:54 AM EST     -0.19 feet Low Tide
Tue -- 02:25 PM EST     Moonset
Tue -- 05:16 PM EST     Sunset
Tue -- 05:48 PM EST     3.00 feet High 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
-0.20.10.81.52.12.52.521.40.80.3-0-0.20.10.81.72.42.932.72.11.510.5

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
Wind Forecast for Baltimore, MD/Washington (12,3,4,5)
      (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.