Friday, April10, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Chesapeake City, 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 6:30AMSunset 7:38PM Friday April 10, 2020 3:08 PM EDT (19:08 UTC) Moonrise 9:59PMMoonset 7:25AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 138 Pm Edt Fri Apr 10 2020
.gale warning in effect until midnight edt tonight...
.small craft advisory in effect from midnight edt tonight through late tonight...
This afternoon..W winds 25 kt with gusts to 40 kt. Waves 3 ft... Except around 1 ft near the mouth of the susquehanna. A chance of sprinkles.
Tonight..NW winds 15 to 20 kt with gusts to 35 kt... Becoming W 10 kt with gusts to 20 kt late. Waves 2 to 3 ft.
Sat..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..W winds 5 to 10 kt...becoming se after midnight. Waves 1 ft.
Sun..S winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Waves 1 to 2 ft. A chance of showers.
Sun night..S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers.
Mon..S winds 15 to 20 kt...becoming W 10 to 15 kt. Waves 2 to 3 ft. Showers with a chance of tstms through the day, then a chance of showers in the evening.
Tue..NW winds 5 to 10 kt. Waves 1 ft. A chance of rain through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 138 Pm Edt Fri Apr 10 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Strong and gusty westerly winds will persist over the waters today before high pressure gradually builds overhead tonight through Saturday. The high will then shift offshore Saturday night as low pressure tracks to our west Sunday night into Monday, ushering a cold front through the waters Monday evening. Small craft advisories will likely be required for a portion of the waters on Saturday, then again on Sunday, with gale conditions possible late Sunday night into Monday.


7 Day Forecast for Marine Location Near Chesapeake City, MD
   Hourly   EDIT   Help
location: 39.5, -75.92     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KPHI 101430 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1030 AM EDT Fri Apr 10 2020

SYNOPSIS. An area of low pressure will drift through eastern Canada through the weekend, while high pressure builds across the deep south today and Saturday, before moving offshore Saturday night. Our area will remain under a tight pressure gradient between these two features today through the weekend. A strengthening low pressure system will move across the Mid West states Sunday night, then into the Great Lakes region Monday and into southern Canada Monday night. This will lift an occluding frontal system across the Mid Atlantic region Sunday night into Monday. Another system could affect portions of the Mid Atlantic region around Wednesday, with a clipper type system around Thursday.

NEAR TERM /THROUGH TONIGHT/.

Morning update .

No significant changes with the morning update, just some minor tweaks to reflect latest trends. Winds are beginning to increase as diurnal mixing increases. Expecting a lot of 40-45 mph gusts through the afternoon with a couple of 50mph gusts possible. The Wind Advisory remains in effect, and while it may be marginal as to how frequent the 45+ mph gusts will be, it will be a blustery day regardless with a tight pressure gradient in place.

Also seeing plenty of stratocumulus development with some spotty light showers around especially to the northwest. Expect this theme to continue for much of the day. With steep lapse rates (very cold air aloft) some of the showers could fall as snow especially this morning, but dry surface layer should keep intensities light. An SPS also remains in effect for most of the region due to an elevated risk of wildfire spread today. Previous discussion follows .

Clouds will thicken fairly quickly during the day, as mixing and diurnal heating generate saturated parcels readily after sunrise. This should keep temperatures from warming (especially given the ambient cold advection). Nudged highs slightly lower today given these factors.

The main story today will be the winds. Model forecast soundings indicate another day of mixing to 850-800 mb, with winds of 35-45 kt at these levels likely mixing to the surface rather efficiently in the cold-advection regime in place. Wind gusts of 40 to 50 mph will be likely at times today, especially near/south of Philadelphia in closer proximity to stronger winds aloft. However, the threat of advisory-level gusts persists across the area, and the wind advisory was unchanged with this forecast update. With the elevated winds and strong mixing, fire-weather concerns are elevated today. Please see the Fire Weather section for more details.

Attention tonight turns to temperatures, as the strong cold advection occurring today will lead to a temperature plunge tonight. Model guidance is generally in agreement that areas northwest of the Philadelphia metropolitan area will reach or drop below freezing overnight. However, confidence is not particularly high, since winds will likely remain elevated through the night. In such regimes, models tend to be too aggressive with the temperature drop, especially in more urbanized areas. Nevertheless, with the growing season in full swing southeast of the Poconos and with consistent guidance showing temperatures falling below freezing in Berks County, the Lehigh Valley, the far west suburbs of Philadelphia, and northern New Jersey, hoisted a freeze watch for the overnight hours in these areas. Will need to watch the Pine Barrens as well, as temperatures often drop precipitously, even in otherwise elevated wind conditions.

SHORT TERM /SATURDAY THROUGH SUNDAY/. Saturday will remain rather breezy, though considerably less so than today. Winds will likely diminish by late afternoon as high pressure approaches the area. With the upper-level trough axis moving offshore, should see thicknesses increase, allowing for a slightly warmer day compared to Friday. Used a statistical blend for highs, resulting in readings in the mid to upper 40s in the Poconos to the mid 50s southeast of the I-95 corridor. Unfortunately, the breezy conditions and resultant mixing will allow for another day of elevated fire weather concerns. As high pressure shifts offshore Saturday night, winds will become light and back to a more southerly or southeasterly direction. Subtle warm advection should prevent a collapse in temperatures, but I suspect the rural/valley locations will see another cold night, with potential for more frost/freeze products.

By Sunday, the Mid-Atlantic will begin to see downstream midlevel ridging as a very potent shortwave trough ejects into the southern Plains. Warm advection will increase in earnest during the day, with an associated increase in cloud cover as well. Despite the dampened insolation, the height rises and warm advection will result in a considerable warmup. Highs may approach 70 in much of the area. The region will be well downstream of large-scale lift with the approaching system, so have unmentionable PoPs through the day. The sensible weather of interest will once again be the winds, as they increase from the south during the day. Could see some gusts of 25 to 35 mph by the afternoon, but fortunately, the warming temperatures will be compensatory to most.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. The main focus for the long term forecast will be Sunday night into Monday. An area of low pressure will move across the Mid- West states and into the Great Lakes area Sunday night, before lifting into southern Canada on Monday. This will lift an occluding frontal system across the Mid-Atlantic and northeastern states. Rainfall is expected to begin overnight Sunday, then continue into Monday, before ending later Monday afternoon into Monday evening as the cold front pushes offshore. Several concerns are beginning to take shape with this system. The first will be the potential for moderate to heavy rainfall overnight Sunday into Monday morning. 1-2 inches of rain will be possible, with the heaviest rainfall expected for portions of eastern Pennsylvania and northern/central New Jersey. Latest model guidance indicates that there will be some instability developing during day ahead of the approaching cold front, so there will be a chance of thunderstorms. Thunderstorms would mostly be confined to daytime hours Monday. This leads to the next concern, which may be the greatest threat. Low level winds with this system are forecast to increase significantly with 925-850 mb winds potentially increasing to 50-70+ knots. Not all of these winds would mix down to the surface, however, we will likely have some decent mixing overnight Sunday into Monday, so we do expect a very windy overnight Sunday into Monday period. We can expect at least 40-50 mph winds, especially for south and eastern New Jersey, and central and southern Delaware and Maryland where the strongest winds are expected.

The front will have moved offshore by Monday afternoon/Monday evening. Gusty winds will continue night into Tuesday, before beginning to relax overnight Tuesday. There will be a slight chance of showers Tuesday as a couple of short waves/vorticity impulse move across the area.

There continues to be some disagreement with the long term models in how they handle a potential coastal storm developing along the old cold front offshore of the east coast Tuesday night into Wednesday.. The ECMWF is much more aggressive strengthening the low moving it offshore of the Mid- Atlantic and bringing rain or even snow to portions of the area. The GFS and Canadian suppresses the system and keep rain away from the area. We will have a chance of showers due the uncertainty, but no more than 40 to 50 percent across southern New Jersey and southern Delaware and Maryland.

There is better agreement with a possible clipper type system affecting the area around Wednesday night into Thursday. This could bring a chance of rain, or even snow showers to portions of the area Wednesday night into Thursday. High pressure is forecast to briefly build into the area late Thursday, before another potential storm at the end of the week.

AVIATION /15Z FRIDAY THROUGH TUESDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today . Mainly VFR, though CIGs of 3500-6000 feet will likely encompass much of the area by midday. West to northwest winds 15 to 25 kt with gusts 30-40+ kt likely. Moderate confidence.

Tonight . VFR with west to northwest winds 10 to 20 kt with gusts up to 30 kt, especially during the evening. High confidence.

Outlook .

Saturday . VFR with west winds 10 to 20 kt with gusts up to 30 kt, likely diminishing slowly by late afternoon. High confidence.

Saturday night . Mainly VFR with winds becoming light southerly or southeasterly. Moderate confidence.

Sunday . Increasing cloudiness with south winds increasing to 10 to 20 kt with gusts up to 30 kt by afternoon. Mainly VFR, but conditions may approach MVFR late. Low confidence.

Sunday night-Monday . A frontal system will move across the area leading to periods of moderate to heavy rain, along with MVFR to IFR conditions likely, improving during the day Monday. Very wind conditions are likely to develop overnight Sunday into Monday, with gusts potentially reaching 35-45 knots. Moderate confidence.

Monday night-Tuesday . VFR conditions expected. West to northwest winds gusting to 20-30 knots. Moderate confidence.

MARINE. Gales continue on the Atlantic waters and Delaware Bay today. West to northwest winds of 20 to 35 kt with gusts to 45 kt are likely. Conditions should slowly improve tonight but will likely exceed gale criteria through most of the night. The gale warning continues through 6 am Saturday.

Seas will generally range from 3 to 6 feet.

Outlook .

Saturday . Advisory conditions likely with west winds 10 to 20 kt with gusts to 30 kt. However, conditions will improve with time and possibly become sub-advisory by evening.

Saturday night . Sub-advisory winds/seas anticipated.

Sunday . South winds will increase rapidly, likely reaching advisory criteria by afternoon. Seas are expected to approach/exceed 5 feet late in the day as well.

Sunday night-Monday . A frontal system will move across the area, leading to very strong winds across the waters. At least Gale force gusts are expected, with potentially Storm force winds possible late Sunday night into Monday.

Monday night-Tuesday . Gale force winds could continue into early Monday night, before lowering to Small Craft Advisory levels overnight into Tuesday.

FIRE WEATHER. Windy conditions will occur again today. This will allow the low levels to mix readily, with dew points likely dropping to the upper teens to lower 20s. This will result in relative humidity values dropping to near or below 30 percent in most locations outside the southern Poconos. As a result, the threat for the rapid spread of fires is quite high today, and a Special Weather Statement has been issued in coordination with our fire-weather partners.

Conditions will not improve on Saturday. Although winds will likely be lower, relative humidity values will also likely be lower than values seen today. As a result, the threat for the rapid spread of fires will be high again.

PHI WATCHES/WARNINGS/ADVISORIES. PA . Freeze Watch from late tonight through Saturday morning for PAZ060>062-101-103-105. Wind Advisory until 7 PM EDT this evening for PAZ054-055- 060>062-070-071-101>106. NJ . Freeze Watch from late tonight through Saturday morning for NJZ001-007>010. Wind Advisory until 7 PM EDT this evening for NJZ001-007>010- 012>027. DE . Wind Advisory until 7 PM EDT this evening for DEZ001>004. MD . Wind Advisory until 7 PM EDT this evening for MDZ008-012-015- 019-020. MARINE . Gale Warning until 6 AM EDT Saturday for ANZ430-431-450>455.

Synopsis . Robertson Near Term . CMS/O'Brien Short Term . CMS Long Term . Robertson Aviation . CMS/Robertson Marine . CMS/Robertson Fire Weather .


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 6 mi50 min W 15 G 28 48°F 54°F1002.5 hPa
DELD1 - 8551762 - Delaware City, DE 18 mi50 min NW 16 G 24 49°F 56°F1001.6 hPa
RDYD1 - 8551910 - Reedy Point, DE 19 mi50 min 47°F 54°F1001.3 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 26 mi50 min W 25 G 32 47°F 52°F1003.9 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 32 mi50 min WNW 34 G 41 47°F 1001.5 hPa
MRCP1 - 8540433 - Marcus Hook, PA 34 mi50 min 47°F 53°F1000.7 hPa
FSNM2 37 mi74 min WNW 35 G 41 46°F 1003.1 hPa
BLTM2 - 8574680 - Baltimore, MD 38 mi50 min NNW 16 G 26 48°F 52°F1003.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 38 mi50 min WNW 31 G 35 47°F 1003 hPa
CPVM2 43 mi50 min 49°F
APAM2 - 8575512 - Annapolis, MD 46 mi56 min 50°F 1004.1 hPa

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
3
PM
Last
24hr
NW17
G25
NW16
NW18
G25
NW15
G20
NW8
G15
W4
G7
W13
G19
W15
G25
NW17
G24
NW13
G18
NW12
G22
W14
G21
W8
G16
W8
G12
W11
G19
W8
G13
W10
G18
NW15
G20
W16
G22
W12
G21
NW18
G23
NW18
G24
W12
G22
NW20
G28
1 day
ago
NW11
NW9
G13
NW11
N6
G11
S1
--
SE6
G10
SE4
G8
E2
E2
E1
G4
NE2
S1
NE2
--
NW2
E1
G8
SE3
S3
SW8
G11
SW8
G13
W10
G13
NW16
G22
NW21
G28
2 days
ago
E4
E3
SE3
S1
G4
--
--
SW2
W2
--
W2
G6
W5
G10
S4
SW5
SW4
SW5
W4
W4
G7
NW4
NW7
W5
NW11
G15
NW11
G18
NW8
G11
NW8
G12

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, MD13 mi70 minWNW 15 G 2410.00 miOvercast47°F22°F37%1003.4 hPa
Wilmington, New Castle County Airport, DE21 mi17 minWNW 26 G 3610.00 miOvercast and Windy48°F21°F34%1002.1 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
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
1
PM
2
PM
3
PM
Last 24hrNW15
G24
W13
G25
NW14
G23
NW8
G19
W9
G15
W9
G16
W17
G27
W10
G21
NW15
G21
W10W10
G20
W7W10
G18
W12
G18
W9
G19
W9W16
G21
W15
G24
W16
G24
W16
G27
W19
G29
NW19
G31
W15
G24
W17
G28
1 day agoW11
G16
W9
G15
W5W4CalmCalmCalmE7
G14
E4E3CalmCalmE3NE4CalmN4E4--S5W8SW7W14
G22
W20
G36
W22
G37
2 days agoS4SW5S6SW3CalmSW4CalmSW3CalmSW5SE3SW4SW5W3SW6CalmSW3W3W4N6N10NW7W8
G14
W10

Tide / Current Tables for Old Town Point Wharf, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Old Town Point Wharf
Click for Map
Fri -- 12:02 AM EDT     2.34 feet High Tide
Fri -- 05:48 AM EDT     0.07 feet Low Tide
Fri -- 06:33 AM EDT     Sunrise
Fri -- 08:24 AM EDT     Moonset
Fri -- 12:27 PM EDT     3.41 feet High Tide
Fri -- 07:19 PM EDT     0.18 feet Low Tide
Fri -- 07:36 PM EDT     Sunset
Fri -- 10:58 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
2.32.21.71.10.60.20.10.30.81.52.333.43.332.31.610.50.20.30.61.11.7

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
Fri -- 03:12 AM EDT     -2.40 knots Max Ebb
Fri -- 06:32 AM EDT     Sunrise
Fri -- 06:50 AM EDT     0.10 knots Slack
Fri -- 08:24 AM EDT     Moonset
Fri -- 09:55 AM EDT     2.44 knots Max Flood
Fri -- 01:23 PM EDT     -0.01 knots Slack
Fri -- 03:52 PM EDT     -1.80 knots Max Ebb
Fri -- 07:02 PM EDT     0.04 knots Slack
Fri -- 07:36 PM EDT     Sunset
Fri -- 10:01 PM EDT     2.02 knots Max Flood
Fri -- 10:58 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
-0.8-1.7-2.2-2.4-2.3-1.9-1.30.61.72.32.42.21.70.9-1.1-1.7-1.8-1.6-1.2-0.31.21.821.8

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 Philadelphia/Mount Holly, PA (15,3,4,5)
      (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.