Tuesday, September28, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Brookmont, MD

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 7:00AMSunset 6:57PM Tuesday September 28, 2021 1:02 AM EDT (05:02 UTC) Moonrise 10:34PMMoonset 1:20PM Illumination 57% Phase: Waning Gibbous; Moon at 21 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- 1035 Pm Edt Mon Sep 27 2021
Rest of tonight..SW winds 5 to 10 kt. Waves 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms.
Tue night..N winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 kt. Waves less than 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
Thu night..N winds 5 to 10 kt. Waves 1 ft.
Fri..N winds around 5 kt. Waves 1 ft.
Sat..W winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1035 Pm Edt Mon Sep 27 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the waters late Tuesday. Canadian high pressure will then build southward toward the waters through the end of the work week. Small craft advisories may be needed for portions of the waters Tuesday.


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 280130 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 930 PM EDT Mon Sep 27 2021

SYNOPSIS. A cold front will move through the region from the north on Tuesday evening. Canadian high will build back into the region behind the frontal passage and remain in place through the early part of this weekend. Another system may impact the region on Sunday.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/.

Increasing mid-high level clouds overnight ahead of a cold front dropping south from Pennsylvania. Expecting dry conditions through much of the night with increasing PoPs across the NW after 09Z.

SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/. As the high pressure departs the SE shore, warm and moist advection will continue to be introduced early Tuesday morning. A large upper level feature will push down across the area with an initial shortwave trough moving through western MD during the late overnight hours into early morning on Tuesday and move ESE. With this feature, coupled with modest instability parameters with that warm, moist advection coming from southerly flow, a few showers and thunderstorms are possible for the initial round. It does not look as organized as the next feature in the afternoon but still may bring some showers and gusty winds to areas mainly north of I-66. Also worth mentioning, decent midlevel lapse rates along with cooler midlevel temperatures may allow for some smaller hail embedded with any thunderstorms that do form with this line, though it looks isolated in nature.

As the shortwave pulls out by early afternoon, a cold front associated with a deep upper level trough will start to migrate through the area. With peak daytime heating in place, this disturbance may become a bit more organized in nature. MUCAPE values continue to look fairly strong with 2000+ j/kg possible east of I-81 during the afternoon and evening hours. Bulk shear values continue to moderately impress with 30 to 35 knots. Guidance continues to favor the strongest storms along and east of I-95 by the evening hours. Some strong to severe storms are possible east of I-81 but especially along and east of the I-95 corridor. Main threats for these storms will be for damaging winds and large hail. Peak strength looks to be anywhere from 6 to 10 pm before peak heating diminishes. With a lack of strong upper level forcing, coverage looks to remain scattered in nature but will continue to monitor the latest guidance.

After the front passes late Tuesday night into Wednesday, some residual showers could linger across the northern portions of the CWA before morning rush hour on Wednesday. Canadian high pressure starts to build in from the north and allow an extended dry period to commence.

LONG TERM /THURSDAY THROUGH MONDAY/. A prolonged stretch of dry weather and below normal temperatures is expected to start the long term period. By Thursday, the longwave pattern across the CONUS will be highly amplified, and as a result, will remain rather stagnant heading into this weekend. An upper low embedded within a longer wave trough will be situated near the Gulf of Maine, while a relatively narrow, but high amplitude ridge will extend from Florida through the Great Lakes and up over Hudson Bay. With those features moving very little, deep layer north to northwesterly flow will reside over the area through at least Saturday as the upper low continues to spin off the New England coast and the ridge remains established to our west. This will lead to several days of dry weather, sunny skies, and slightly below normal temperatures.

Further to the west, a trough initially situated over the Rockies will break down into several pieces during the latter portions of the week, as ridging builds to its north. Depending on how this happens, one or more of these features may interact with the aforementioned upper low as it starts to retrograde slightly toward the west. With many moving pieces involved, this remains a low- predictability forecast. As a result, many different solutions are advertised by the available deterministic and ensemble guidance. Most solutions maintain the dry stretch of weather through Sunday, but some solutions (most notably the 12z GFS) bring rain back into the area.

AVIATION /01Z TUESDAY THROUGH SATURDAY/. VFR conditions expected through tonight ahead of the next disturbance that will cross through the northern terminals by early Tuesday morning. A few showers possible for the initial disturbance passage. The next one will introduce higher chances for isolated categorical restrictions, mainly for the eastern terminals (BWI, MTN, DCA, IAD). Showers and thunderstorms possible Tuesday afternoon with showers possible through early Wednesday morning. VFR conditions will follow after the front passes by mid-morning/early afternoon Wednesday.

Quiet conditions are anticipated for Thursday and Friday in the wake of the mid-week cold frontal passage. Expect VFR to rule the period with winds out of the northwest to northerly direction.

MARINE.

Winds are expected to strengthen through the overnight and begin to relax Tue morning.

Thunderstorms will be possible on Tuesday that may require a few SMWs over our marine areas. SCA conditions possible late Tuesday night into early Wednesday with a front passing through the area. After that, high pressure returns and winds diminish, leading to sub- SCA criteria the remainder of Wednesday.

Sub-SCA level winds are expected on both Thursday and Friday.

TIDES/COASTAL FLOODING.

Only Havre de Grace may reach minor coastal flooding overnight, but anomalies have dropped slightly in the past two hours and are currently running around 1.7 ft. This is lower than the 2 ft anomaly observed last Saturday night which did not result in any flooding. Will continue to monitor, but trends suggest no advisory will be needed tonight.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 4 AM EDT Tuesday for ANZ530>532-539- 540. Small Craft Advisory from 11 PM Tuesday to 6 AM EDT Wednesday for ANZ531>534-537-539>541-543. Small Craft Advisory until 10 AM EDT Tuesday for ANZ533-534- 537-541-543.

SYNOPSIS . LFR NEAR TERM . LFR SHORT TERM . ADM LONG TERM . KJP AVIATION . LFR/KJP MARINE . LFR/KJP TIDES/COASTAL FLOODING . LFR


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 mi45 min SW 5.1 G 6 70°F 71°F1012.6 hPa
BSLM2 - Chesapeake Bay, MD 23 mi93 min WSW 6 68°F 1013 hPa58°F
APAM2 - 8575512 - Annapolis, MD 33 mi45 min SW 1 G 8 70°F 75°F1012.7 hPa
44063 - Annapolis 35 mi33 min 69°F 74°F1 ft1013.1 hPa
TPLM2 - Thomas Point, MD 35 mi63 min S 18 G 20 71°F 74°F1013.6 hPa (-1.1)
BLTM2 - 8574680 - Baltimore, MD 37 mi45 min WSW 1.9 G 4.1 70°F 75°F1012.5 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 37 mi45 min SW 2.9 G 2.9 70°F 1013 hPa
FSNM2 37 mi45 min WSW 4.1 G 5.1 71°F 1012.9 hPa
CPVM2 38 mi45 min 73°F 61°F
NCDV2 42 mi45 min SW 8.9 G 12 71°F 75°F1013 hPa
44062 - Gooses Reef, MD 44 mi33 min SSW 16 G 21 69°F 74°F1 ft1014.1 hPa

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
Last
24hr
S3
S3
SW2
SW2
S3
SW1
SW1
SW2
SW3
S1
S6
S9
S9
G12
S9
G12
S11
S9
S11
S9
S5
S6
G9
S7
S8
G11
S6
G10
SW4
1 day
ago
NW4
G7
NW6
G10
NW6
G11
NW5
G12
NW4
G9
NW2
NW5
G8
--
W4
NW5
G10
NW9
G13
NW6
G13
NW6
G14
NW9
G15
NW10
G13
NW8
G17
NW10
G14
NW7
G14
NW5
SW1
W2
SW2
SW2
S3
2 days
ago
W2
SE1
W1
NW2
W2
--
S2
S1
G7
W4
G8
W1
G5
SW5
S5
W4
SW4
S2
S3
G6
S3
S2
SE3
W2

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 mi71 minSSW 810.00 miFair70°F56°F61%1012.9 hPa
College Park Airport, MD10 mi68 minN 010.00 miFair69°F54°F58%1012.9 hPa
Camp Springs / Andrews Air Force Base, MD14 mi67 minSSW 1110.00 miFair68°F53°F59%1013 hPa
Fort Belvoir, VA14 mi67 minS 310.00 miFair69°F55°F61%1013.4 hPa
Gaithersburg - Montgomery County Airport, MD17 mi67 minN 010.00 miFair63°F56°F78%1014.9 hPa
Washington/Dulles International Airport, DC, VA19 mi71 minSSW 910.00 miFair66°F55°F68%1012.6 hPa
Fort Meade / Tipton, MD21 mi68 minN 010.00 miFair57°F57°F100%1013.9 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)
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
12
AM
Last 24hrSW4SW3SW4SW3SW4SW4CalmSW3S4S3S8S11S12
G19
S12S14S12
G19
S9S9S7S8S11S11S8S8
1 day agoNW11
G18
NW11
G18
NW9NW9NW9
G19
NW6Calm3W5--NW12
G18
NW9
G18
NW10W9
G19
NW13
G23
W16
G21
W14W9W5SW5SW5SW5SW4S4
2 days agoCalmCalmN3CalmCalmN3CalmN3CalmCalmSE3W7W7S5SW10S5W6W5SW6S5S4S4S5W5

Tide / Current Tables for Chain Bridge, one mile below, D.C.
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Chain Bridge
Click for Map
Tue -- 01:49 AM EDT     3.11 feet High Tide
Tue -- 07:01 AM EDT     Sunrise
Tue -- 08:57 AM EDT     0.75 feet Low Tide
Tue -- 02:19 PM EDT     Moonset
Tue -- 02:41 PM EDT     2.66 feet High Tide
Tue -- 06:55 PM EDT     Sunset
Tue -- 08:27 PM EDT     0.64 feet Low Tide
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 11:34 PM EDT     Moonrise
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
2.733.12.92.521.51.10.80.80.91.31.92.42.62.72.41.91.40.90.70.70.91.4

Tide / Current Tables for Reagan National Airport, Washington, D.C.
   EDIT      (on/off)   Help   One Week of Data
Reagan National Airport
Click for Map
Tue -- 01:35 AM EDT     3.23 feet High Tide
Tue -- 07:01 AM EDT     Sunrise
Tue -- 08:44 AM EDT     0.80 feet Low Tide
Tue -- 02:19 PM EDT     Moonset
Tue -- 02:27 PM EDT     2.77 feet High Tide
Tue -- 06:55 PM EDT     Sunset
Tue -- 08:14 PM EDT     0.68 feet Low Tide
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 11:34 PM EDT     Moonrise
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
2.93.23.232.51.91.41.10.90.811.52.22.62.72.72.41.91.30.90.70.711.6

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of    EDIT
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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.