Thursday, April2, 2020
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Marine Weather and Tides
Severna Park, 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 6:46AMSunset 7:32PM Thursday April 2, 2020 4:49 AM EDT (08:49 UTC) Moonrise 12:10PMMoonset 2:26AM Illumination 68% 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
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ANZ538 Patapsco River Including Baltimore Harbor- 439 Am Edt Thu Apr 2 2020
.small craft advisory in effect through Friday afternoon...
Rest of the overnight..NW winds 10 kt. Waves 1 ft.
Today..NW winds 5 to 10 kt with gusts to 20 kt... Increasing to 15 kt with gusts to 25 kt in the afternoon. Waves 1 to 2 ft.
Tonight..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Fri..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Fri night..N winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sat..NE winds around 5 kt. Waves 1 ft or less.
Sat night..Light winds. Waves flat.
Sun..W winds around 5 kt. Waves 1 ft or less.
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 Severna Park, MD
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location: 39.07, -76.57     debug


Area Discussion for - Baltimore, MD/Washington
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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
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 8 mi49 min 44°F 1011.9 hPa (+0.7)
CPVM2 11 mi49 min 46°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 11 mi49 min WNW 12 G 14 45°F 1012 hPa (+0.3)
FSNM2 11 mi61 min WNW 15 G 18 44°F 1011.7 hPa
BLTM2 - 8574680 - Baltimore, MD 14 mi49 min N 8.9 G 13 45°F 51°F1011.9 hPa (+0.3)
TPLM2 - Thomas Point, MD 14 mi49 min WNW 12 G 14 45°F 50°F1013.3 hPa (+1.2)25°F
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi115 min N 17 G 20 46°F 53°F1012.1 hPa
BSLM2 - Chesapeake Bay, MD 21 mi139 min NNW 5.1 1012 hPa
WASD2 - 8594900 - Washington, DC 28 mi49 min NNW 2.9 G 5.1 47°F 55°F1013.5 hPa (+1.4)
44062 - Gooses Reef, MD 36 mi37 min NNW 16 G 18 47°F
CA2 - 8571892 - Cambridge, MD 43 mi49 min NW 15 G 21 47°F 53°F1011.6 hPa (+1.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi49 min NNW 24 G 28 1012.6 hPa (+1.5)

Wind History for Francis Scott Key Bridge NE Tower, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD8 mi55 minWNW 610.00 miFair45°F26°F48%1012.4 hPa
Baltimore, Baltimore-Washington International Airport, MD10 mi55 minWNW 810.00 miFair40°F25°F55%1012.3 hPa
Fort Meade / Tipton, MD11 mi64 minWNW 310.00 miFair36°F28°F75%1013.5 hPa
Bay Bridge Field, MD14 mi64 minNNW 12 G 1910.00 miFair45°F26°F49%1012.2 hPa
Baltimore, Inner Harbor, MD15 mi55 minno data mi44°F24°F45%1012.1 hPa
Baltimore / Martin, MD20 mi65 minWNW 610.00 miFair37°F28°F70%1012.5 hPa
College Park Airport, MD20 mi64 minN 010.00 miFair43°F19°F39%1012.9 hPa
Camp Springs / Andrews Air Force Base, MD23 mi53 minNW 410.00 miFair42°F23°F47%1013.3 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Last 24hrNE7N9NE9N5NE12
G17
NE10NW7N7NW9NW6NW7N65N8NW4W4W3CalmNW46N7N5NW6W8
1 day agoCalmNW4N3N3N5NE7--4E7E11E14E10E13E10E10--E12
G18
E10E9E12NE14NE10NE10NE8
2 days agoE4SE5SE4S3S5SW7S7SW10S8W11
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NW7N7N4N7N7N6N7NW3CalmNW5

Tide / Current Tables for Cedar Point, Severn River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Thu -- 01:18 AM EDT     0.32 knots Max Flood
Thu -- 03:25 AM EDT     Moonset
Thu -- 03:48 AM EDT     -0.00 knots Slack
Thu -- 06:43 AM EDT     -0.41 knots Max Ebb
Thu -- 06:47 AM EDT     Sunrise
Thu -- 09:19 AM EDT     0.00 knots Slack
Thu -- 01:09 PM EDT     Moonrise
Thu -- 01:09 PM EDT     0.84 knots Max Flood
Thu -- 04:39 PM EDT     -0.00 knots Slack
Thu -- 07:30 PM EDT     Sunset
Thu -- 08:01 PM EDT     -0.79 knots Max Ebb
Thu -- 11:42 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.30.2-0-0.2-0.4-0.4-0.3-0.10.20.50.70.80.80.60.2-0.1-0.5-0.7-0.8-0.7-0.5-0.2

Weather Map
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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 (4,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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.