Thursday, February20, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Havre de Grace, 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 6:49AMSunset 5:48PM Thursday February 20, 2020 11:46 AM EST (16:46 UTC) Moonrise 5:16AMMoonset 2:55PM Illumination 10% Phase: Waning Crescent; Moon at 27 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
ANZ530 Chesapeake Bay North Of Pooles Island- 946 Am Est Thu Feb 20 2020
.small craft advisory in effect from 9 pm est this evening through Friday morning...
Rest of today..NW winds 5 to 10 kt. Waves 1 ft or less. A chance of sprinkles and flurries this afternoon.
Tonight..N winds 5 to 10 kt. Gusts up to 20 kt in the late evening and overnight. Waves 1 ft.
Fri..NW winds 5 to 10 kt. Gusts up to 25 kt. Waves 1 ft.
Fri night..W winds 5 kt. Waves less than 1 ft.
Sat..W winds 5 to 10 kt. Waves 1 ft.
Sat night..W winds 5 to 10 kt. Waves 1 ft or less.
Sun..S winds 5 kt. Waves less than 1 ft.
Mon..S winds 5 to 10 kt. Waves 1 ft. A chance of showers through the day, then showers likely through the night.
ANZ500 946 Am Est Thu Feb 20 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will pass off the coast of the southeastern united states this evening. High pressure will build west of the area through the weekend.


7 Day Forecast for Marine Location Near Havre de Grace city, MD
   Hourly   EDIT   Help
location: 39.54, -76.09     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 201440 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 940 AM EST Thu Feb 20 2020

SYNOPSIS. An area of low pressure will pass well south of the region today into tonight. High pressure will build over the Mid- Atlantic through the weekend. Low pressure will approach from the Midwest early next week.

NEAR TERM /THROUGH TONIGHT/. Made a few minor tweaks to temperatures based on latest observations. Otherwise, the forecast is on track.

An upper level jet streak passing through the northeastern quadrant of the CONUS has been responsible for spreading high clouds across the forecast area.

Low pressure in the southern stream is organizing in the northern Gulf of Mexico. Meanwhile, a northern stream trough axis is pivoting across the Great Lakes. Anticipate clouds to continue lowering and becoming thicker due more to the southern stream energy, but also supported by lowering heights thanks to the northern stream.

The northern drift in consecutive model runs seems to have stopped this cycle. Some moisture should be drawn north this afternoon due to the trough and departing jetmax; however, believe airmass simply too dry, storm system too weak, and storm track too far south to support accumulating snowfall within the forecast area. That's not to say that there may not be a few flurries (or sprinkles at onset due to low level temperatures) from late afternoon into early evening due to the mid-upper level forcing. Will still be carrying chance PoPs for the central Shenandoah Valley east to the tip of southern Maryland since the upper end of the envelope still supports this possibility.

By midnight, low pressure will push away from the southeast coast. Reinvigorated cold advection and clearing skies will ensue, with lows solidly in the teens (west and north) to the 20s (DC-Balt metro and central VA).

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. With southern stream low pressure gone, the synoptic focus will return to high pressure building across the eastern 2/3rds of the CONUS. The thermal trough will be crossing the eastern section of the country Friday; anticipate it will be the coldest day of the week. A moderating trend will begin Saturday.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. The long term portion of the forecast will start off quietly, but transition to a more active pattern during the early to middle portions of the upcoming week. High pressure located overhead will slide offshore during the day on Sunday. Southerly return flow will develop on the back side of the high, enabling temperatures to moderate a few degrees compared to Saturday. Highs should be in the mid 50s for most beneath mostly sunny skies.

An initially closed upper low will rapidly track across the CONUS on Sunday and Monday, eventually shearing out into more of an open wave as it progresses to the east of the Mississippi. High clouds will begin to stream in well in advance of this system late Sunday night through Monday morning, but any rain should hold off until later in the day Monday, or possibly even Monday night. Chances for showers will persist through Monday night and into Tuesday within the zone of warm advection in advance of the shortwave. We may see a brief break in the precipitation Tuesday Night into early Wednesday between the lead shortwave and a much deeper trough which will dig in behind it. The break won't be long lived however, with precipitation potentially breaking out once again Wednesday afternoon in advance of the second, more potent trough.

AVIATION /15Z THURSDAY THROUGH MONDAY/. VFR should prevail today and tonight. An impulse will pass well to the south of the terminals, but some of its moisture will be drawn north. Subsequently, ceilings will lower (likely to 4000-5000 ft) and a few flurries or sprinkles will be possible. If anything more than that were to occur, it would happen at CHO (maybe borderline MVFR?). Do not believe there will be any accumulations, nor vsby restrictions.

This low will be off the southeast coast and pulling away by midnight if not before. Skies will clear overnight as winds pick up. These winds (around 25 kt) may not fully mix down to the ground though.

High pressure will prevail Fri through much of the day Monday. Conditions could potentially deteriorate to sub-VFR Monday night into Tuesday.

MARINE. Light north winds should prevail (10 kt or less) through much of the day. Low pressure tracking east will pass well to the south of the waters late this afternoon into this evening. Look for a reinforcing surge of north winds in its wake tonight into Friday. Have issued Small Craft Advisories to cover this threat.

High pressure will be building Friday through the weekend, relaxing the pressure gradient. No additional flags expected at this time.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 9 PM this evening to 11 AM EST Friday for ANZ530>532-538>540. Small Craft Advisory from 9 PM this evening to 3 PM EST Friday for ANZ533-534-537-541>543. Small Craft Advisory from midnight tonight to 8 AM EST Friday for ANZ535-536.

SYNOPSIS . HTS/DHOF NEAR TERM . HTS/DHOF SHORT TERM . HTS LONG TERM . KJP AVIATION . HTS/KJP MARINE . HTS/KJP/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
CHCM2 - 8573927 - Chesapeake City, MD 15 mi52 min 35°F 42°F1032.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 24 mi52 min 35°F 43°F1032.7 hPa
DELD1 - 8551762 - Delaware City, DE 27 mi52 min 34°F 46°F1032.4 hPa
RDYD1 - 8551910 - Reedy Point, DE 27 mi52 min 34°F 42°F1031.9 hPa
BLTM2 - 8574680 - Baltimore, MD 32 mi52 min 36°F 43°F1032.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 32 mi70 min 35°F 1032.6 hPa
FSNM2 32 mi142 min NNE 7 G 8.9 34°F 1031.9 hPa
MRCP1 - 8540433 - Marcus Hook, PA 40 mi52 min 34°F 42°F1032.2 hPa
CPVM2 41 mi52 min 36°F
SJSN4 - 8537121 - Ship John Shoal, NJ 41 mi52 min 34°F 1032.6 hPa
APAM2 - 8575512 - Annapolis, MD 44 mi52 min 37°F 1032 hPa
TPLM2 - Thomas Point, MD 48 mi46 min N 8 G 8.9 36°F 42°F1033.2 hPa (+0.0)13°F

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
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
7
AM
8
AM
9
AM
10
AM
11
AM
Last
24hr
NW11
G17
NW8
G15
NW9
G15
NW10
G15
NW8
G11
NW11
NW5
G8
NW7
NW5
G8
--
SW1
NW2
NW1
SE2
W1
S1
SE2
S1
S1
N3
NE3
G6
NE6
NE4
G7
N3
1 day
ago
E4
G7
W8
G14
SW8
G11
SW5
G11
SW7
G10
SW4
G7
SW4
NW4
NW3
NW3
NW3
NW4
W1
NW8
G12
NW10
G14
NW10
G16
NW10
G14
NW6
G16
NW9
G12
NW9
G13
NW11
NW6
G11
NW7
G10
NW12
G17
2 days
ago
N4
G7
--
E2
W4
S1
SE4
SE1
--
--
E1
E1
--
--
E1
SE2
--
NE1
E1
E3
NE2
NE1
E5
G8
E4
G7
S4
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Phillips Army Air Field / Aberdeen, MD6 mi1.8 hrsE 67.00 miMostly Cloudy35°F14°F43%1032.9 hPa
Baltimore / Martin, MD22 mi52 minN 310.00 miOvercast36°F12°F38%1033.2 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
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
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrNW8W13
G19
NW7
G16
NW7
G20
NW6NW5NW5NW4W4CalmCalmCalmNW4CalmCalmCalmCalmCalmCalmCalmN5NE7E6NE5
1 day agoS9S12SW8S9S8SW4W5CalmW3CalmW5NW3N3--N8NW9NW10
G17
NW5NW6NW8
G14
N7NW4NW5W8
2 days agoE5E5CalmCalmSE6SE4CalmCalmCalmCalmCalm--E3E4E4CalmNE4NE3E5NE4E5CalmSE5SE6

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Havre de Grace
Click for Map
Thu -- 02:27 AM EST     -0.12 feet Low Tide
Thu -- 05:15 AM EST     Moonrise
Thu -- 06:50 AM EST     Sunrise
Thu -- 07:48 AM EST     1.47 feet High Tide
Thu -- 01:39 PM EST     0.09 feet Low Tide
Thu -- 02:55 PM EST     Moonset
Thu -- 05:46 PM EST     Sunset
Thu -- 07:49 PM EST     2.26 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
0.60.2-0.1-0.10.20.71.11.41.51.31.10.70.40.10.10.30.81.41.92.22.32.11.91.5

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
   EDIT      (on/off)   Help   One Week of Data
Chesapeake and Delaware Canal
Click for Map
Thu -- 01:24 AM EST     0.05 knots Slack
Thu -- 04:09 AM EST     1.88 knots Max Flood
Thu -- 05:14 AM EST     Moonrise
Thu -- 06:49 AM EST     Sunrise
Thu -- 06:52 AM EST     -0.05 knots Slack
Thu -- 10:24 AM EST     -2.17 knots Max Ebb
Thu -- 02:26 PM EST     0.05 knots Slack
Thu -- 02:54 PM EST     Moonset
Thu -- 05:03 PM EST     2.10 knots Max Flood
Thu -- 05:44 PM EST     Sunset
Thu -- 08:54 PM EST     -0.08 knots Slack
Thu -- 11:04 PM EST     -1.41 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
-1.1-0.70.91.61.91.71.2-0.5-1.4-1.9-2.1-2.1-1.9-1.6-11.21.92.121.71.2-0.4-1.2-1.4

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 (11,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (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.