Thursday, July29, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Calvert Beach, 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 6:05AMSunset 8:22PM Thursday July 29, 2021 7:59 PM EDT (23:59 UTC) Moonrise 10:44PMMoonset 10:46AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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
ANZ533 Chesapeake Bay From North Beach To Drum Point- 744 Pm Edt Thu Jul 29 2021
.severe Thunderstorm watch 402 in effect until 9 pm edt this evening...
.small craft advisory in effect from Friday morning through late Friday night...
Tonight..SW winds 10 kt...becoming W late. Gusts up to 20 kt. Waves 1 to 2 ft. A chance of showers and tstms this evening, then scattered showers and tstms after midnight. Vsby 1 nm or less.
Fri..NW winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft.
Fri night..N winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft.
Sat..NE winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds 5 kt. Waves less than 1 ft.
Sun..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sun night..SW winds 5 to 10 kt. Waves 1 ft.
Mon..N winds 5 to 10 kt...becoming e. Waves 1 ft. A chance of showers after midnight.
Tue..E winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 744 Pm Edt Thu Jul 29 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A strong cold front will approach the area through this evening before crossing the region late tonight. A second, weaker front will cross the region Friday night. High pressure will build in for Saturday before another area of low pressure possibly affects the region Sunday. Small craft advisories may be needed Friday night.


7 Day Forecast for Marine Location Near Calvert Beach CDP, MD
   Hourly   EDIT   Help
location: 38.5, -76.5     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 291934 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 334 PM EDT Thu Jul 29 2021

SYNOPSIS. A cold front will approach the area later today and move through tonight. A reinforcing front will move through tomorrow, with high pressure building in its wake for the first half of the weekend. Additional systems may impact the region from Sunday into the early to middle portions of next week as troughing becomes established over the eastern half of the country.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. Current satellite imagery shows a well-defined MCV over western portions of our forecast area. Mainly showers accompany this feature at the moment, but cells are just starting to pop within the zone ahead of it. The expectation is that cells will intensify to the east of the Blue Ridge over the next 1-2 hours as ascent in advance of the MCV overspreads the area of higher instability to the east of the Blue Ridge. Current mesoanalysis shows around 500 J/kg of MLCAPE near the spine of the Blue Ridge, with instability increasing with eastward extent to around 1500 J/kg along the bay. SPC Mesoanalysis shows a belt of around 40 knots of flow at 700 hPa along the Mason-Dixon line, decreasing to around 25 knots at the southern CWA border. At 500 hPa, 40-50 knots of flow is analyzed over the entire CWA. 18z IAD sounding matches up well with those parameters, showing 823 J/kg of MLCAPE, 36 knots of flow at 700 hPa, 40 knots of flow at 500 hPa, and an effective bulk shear value of 43 knots. Given the overlap of shear and instability to the east of the Blue Ridge, supercells appear possible, with upscale growth into bowing segments also possible. With a supercellular storm mode, damaging winds, large hail and tornadoes are all possible. The greatest tornado threat in our area will likely reside across northeastern and north central Maryland, where the greatest low- level shear resides. For that reason, those locations are in a Tornado Watch, while the rest of the CWA is in a severe thunderstorm watch. Flooding looks to be a low, but non-zero threat as storms will be moving along at a fast clip.

In terms of timing, the main round of severe weather is expected to be with the storms developing now (3 PM) ahead of the MCV. This area of storms is nearing the Blue Ridge now, and should progress eastward across the area over the next 2-3 hours, moving over the bay by around 6 PM or so. More isolated activity is possible behind this initial activity. Another more focused round of storms may form across the Ohio Valley late this afternoon and move toward the Allegheny Front this evening. Models are in lesser agreement regarding activity behind the initial round with the MCV, but a few storms could potentially linger into the overnight since the cold front will still be situated off to our north and west. The front will press southward through the area during the second half of the overnight, bringing chances for storms to an end.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/. By daybreak tomorrow, the cold front will be situated just to our south, and will continue to push further to our south throughout the day. Much drier air will gradually advect into the area in northwesterly flow behind the front, with dewpoints dropping from the upper 60s around daybreak to the 50s by evening. Cold advection aloft will largely be offset by diurnal heating, with high temperatures still climbing into the mid to upper 80s. Mostly sunny skies are expected along with a northwesterly breeze. Winds may gust to in excess of 20 mph during the afternoon hours.

A reinforcing cold front will move through tomorrow night, with cooler and even drier air moving into the are in its wake. Lows Friday night will dip into the 50s across the northwestern half of the forecast area, with lower 60s across the southeastern half of the area.

A mix of sun and some high clouds is expected on Saturday as high pressure builds over the Ohio Valley. Winds will be lighter compared to tomorrow. Temperatures will only reach into the upper 70s to lower 80s, and dewpoints will drop into the upper 40s and lower 50s, leading to an uncharacteristically cool day for late July, with well below normal humidity values.

LONG TERM /SUNDAY THROUGH THURSDAY/. A mid-level trough of low pressure and a surface front will bring a chance of showers and thunderstorms Sunday. Highs in the middle 80s.

Weak high pressure will build in behind the front and bring dry and slightly cooler temperatures into the region Sunday night and Monday. Highs Monday lower to middle 80s.

As for Tuesday and Wednesday, a variety of uncertainties expected with a possible front dropping in from the northwest, a possible coastal low to the south and southeast, and timing of each. Should the front win out on verifying, then severe weather could be possible mainly in the western and central zones. If the coastal low wins, then more of a persistent modest rain could evolve which could lead to some localized flooding in the heaviest activities. Highs each day will be in the middle to upper 80s.

AVIATION /19Z THURSDAY THROUGH TUESDAY/. Confidence is increasing that thunderstorms will impact the terminals during the mid to late afternoon hours today. TEMPOs have been introduced into the TAFs where the threat is greatest to narrow in on timing. Coverage of storms is expected to decrease moving into this evening, but at least some threat for an isolated storm or two will last through the first half of the overnight hours.

VFR conditions are expected for both tomorrow and Saturday. Winds may gust to around 20 knots out of the northwest tomorrow afternoon. Lighter winds are expected on Saturday as high pressure builds toward the area from the Ohio Valley.

Isolated showers or a thunderstorm near a few of the terminals could reduce conditions to MVFR briefly; otherwise, VFR conditions expected Sunday through Monday night. Winds southwest 5 to 10 knots Sunday, becoming northwest 5 knots Sunday night. Winds northwest becoming northeast 5 to 10 knots Monday. Winds light and variable Monday night.

MARINE. Winds will gradually increase over the waters today. SCAs are in effect later this afternoon into this evening for southerly channeling. SMWs will likely be needed over the waters this afternoon into this evening. Winds in excess of 50 knots, large hail and even isolated waterspouts may be possible in association with storms this afternoon into this evening. SCA winds are expected again tomorrow in northwesterly flow behind a cold front. This SCA may eventually need to be extended into tomorrow night as a reinforcing cold front moves through. Lighter west to northwesterly winds are expected over the waters on Saturday.

No marine hazards expected Sunday through Monday night. Winds southwest 10 knots Sunday, then northwest becoming northeast 5 to 10 knots Sunday night and Monday. Winds light and variable Monday night.

TIDES/COASTAL FLOODING. Southerly flow ahead of an approaching cold front will result in some locations reaching action stage through tonight. Minor flooding is most likely to occur at the most sensitive sites, such as Annapolis. As the winds become northwest behind the front on Friday, the anomalies will decrease.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 PM EDT this evening for ANZ531>533-539>541. Small Craft Advisory from 8 AM to 6 PM EDT Friday for ANZ530>533-535-536-538>542. Small Craft Advisory until 6 PM EDT Friday for ANZ534-543. Small Craft Advisory from 6 PM this evening to 6 PM EDT Friday for ANZ537.

SYNOPSIS . KJP NEAR TERM . KJP SHORT TERM . KJP LONG TERM . KLW AVIATION . KLW/KJP MARINE . KLW/KJP TIDES/COASTAL FLOODING . CPB/KLW


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
44062 - Gooses Reef, MD 6 mi54 min SSW 7.8 G 9.7 81°F 83°F2 ft1010.8 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 9 mi66 min SSE 7 G 8.9 83°F 1009.9 hPa
SLIM2 - 8577330 - Solomons Island, MD 13 mi66 min SSW 7 G 8 83°F 84°F1010 hPa
BSLM2 - Chesapeake Bay, MD 22 mi90 min SW 5.1 73°F 1010 hPa70°F
CA2 - 8571892 - Cambridge, MD 23 mi66 min S 7 G 9.9 82°F 84°F1009.5 hPa
PPTM2 - 8578240 - Piney Point, MD 25 mi66 min SW 8 G 8.9
TPLM2 - Thomas Point, MD 28 mi60 min SSW 16 G 17 81°F 82°F1010.5 hPa (-1.3)76°F
BISM2 - 8571421 - Bishops Head, MD 31 mi66 min S 11 G 14 83°F 84°F1010.3 hPa
NCDV2 31 mi66 min WSW 8.9 G 12 79°F 87°F1009.7 hPa
44063 - Annapolis 32 mi54 min SW 7.8 G 12 79°F 82°F1 ft1010.8 hPa
APAM2 - 8575512 - Annapolis, MD 33 mi66 min SW 5.1 G 8 82°F 84°F1009.2 hPa
CPVM2 35 mi66 min 83°F 73°F
LWTV2 - 8635750 - Lewisetta, VA 35 mi66 min SSW 6 G 7 84°F 84°F1010.1 hPa
WASD2 - 8594900 - Washington, DC 38 mi66 min SW 4.1 G 7 83°F 85°F1009.9 hPa

Wind History for Cove Point LNG Pier, MD
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last
24hr
S2
E11
E17
E10
G13
E10
NW4
G8
E9
SE11
SE10
SE12
G15
SE13
SE13
SE13
G16
SE12
SE12
SE10
G13
SE11
SE10
SE11
SE12
SE12
SE8
G11
SE7
G10
SE8
1 day
ago
SE9
SE9
SE6
SE5
S6
SW7
SW7
SW9
--
SW6
W4
NW6
NW12
G16
NW6
G9
NW7
NW10
NW8
G11
NW4
G9
NW5
NE3
G9
NW4
G7
W3
S4
G7
SW1
2 days
ago
SE7
SE4
SW4
SW6
SW3
G6
SW4
W3
SW4
SW5
SW5
G8
SW6
G9
SW5
W5
NW6
NW5
NW4
NW2
NW3
E3
SE6
SE7
SE6
SE5
SE6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD13 mi65 minSSW 410.00 miPartly Cloudy81°F73°F79%1011.2 hPa
Patuxent River, Naval Air Station, MD15 mi68 minS 49.00 miMostly Cloudy85°F76°F75%1010.1 hPa

Link to 5 minute data for KNHK

Wind History from NHK (wind in knots)
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last 24hrCalmSE3SE6--SE9CalmE7------SE5SE5SE5S7SE7S7S7S5S6S7S6S6S5S4
1 day agoS5S4S5S6SW5SW4W3CalmW3SW3W4W5NW10N8N7N7N9N8N8NE5NE6S4SW5Calm
2 days agoS3S4SW4SW6SW3CalmSW4W5SW4SW5SW3CalmW6NW6NW53E5E6E6W4SE5E4SE6SE5

Tide / Current Tables for Long Beach, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Long Beach
Click for Map
Thu -- 01:21 AM EDT     0.59 feet Low Tide
Thu -- 06:05 AM EDT     Sunrise
Thu -- 07:08 AM EDT     1.42 feet High Tide
Thu -- 11:46 AM EDT     Moonset
Thu -- 01:47 PM EDT     0.41 feet Low Tide
Thu -- 07:59 PM EDT     1.44 feet High Tide
Thu -- 08:18 PM EDT     Sunset
Thu -- 11:44 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
0.70.60.60.70.91.21.31.41.41.210.80.60.40.40.50.70.91.21.41.41.41.21.1

Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Thu -- 01:50 AM EDT     0.00 knots Slack
Thu -- 04:35 AM EDT     0.33 knots Max Flood
Thu -- 06:05 AM EDT     Sunrise
Thu -- 07:42 AM EDT     -0.00 knots Slack
Thu -- 11:04 AM EDT     -0.52 knots Max Ebb
Thu -- 11:46 AM EDT     Moonset
Thu -- 02:19 PM EDT     0.00 knots Slack
Thu -- 05:21 PM EDT     0.44 knots Max Flood
Thu -- 08:18 PM EDT     Sunset
Thu -- 09:02 PM EDT     -0.00 knots Slack
Thu -- 11:44 PM EDT     Moonrise
Thu -- 11:53 PM EDT     -0.37 knots Max Ebb
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
-0.3-0.200.20.30.30.30.1-0.1-0.3-0.5-0.5-0.5-0.3-0.10.10.30.40.40.30.20-0.2-0.3

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of Mid-Atlantic    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.