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Marine Weather and Tides
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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 5:55AM | Sunset 8:25PM | Monday July 22, 2019 6:20 PM EDT (22:20 UTC) | Moonrise 10:47PM | Moonset 10:09AM | Illumination 67% |  |
ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 437 Pm Edt Mon Jul 22 2019
.small craft advisory in effect until 10 pm edt this evening...
.severe Thunderstorm watch 538 in effect until 10 pm edt this evening...
.small craft advisory in effect Tuesday morning...
Rest of this afternoon..SW winds 15 kt with gusts to 25 kt. Waves 2 ft. Tstms likely with numerous showers. Vsby 1 nm or less.
Tonight..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Widespread tstms and periods of showers. Vsby 1 nm or less.
Tue..N winds 5 to 10 kt. Gusts up to 20 kt until late afternoon. Waves 2 ft. Showers with a chance of tstms.
Tue night..N winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 kt. Waves less than 1 ft.
Thu..E winds 5 to 10 kt. Waves 1 ft or less.
Fri..SE winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
.small craft advisory in effect until 10 pm edt this evening...
.severe Thunderstorm watch 538 in effect until 10 pm edt this evening...
.small craft advisory in effect Tuesday morning...
Rest of this afternoon..SW winds 15 kt with gusts to 25 kt. Waves 2 ft. Tstms likely with numerous showers. Vsby 1 nm or less.
Tonight..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Widespread tstms and periods of showers. Vsby 1 nm or less.
Tue..N winds 5 to 10 kt. Gusts up to 20 kt until late afternoon. Waves 2 ft. Showers with a chance of tstms.
Tue night..N winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 kt. Waves less than 1 ft.
Thu..E winds 5 to 10 kt. Waves 1 ft or less.
Fri..SE winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 437 Pm Edt Mon Jul 22 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will slowly cross the waters through Tuesday morning. High pressure will return for Wednesday and it will remain overhead through the rest of the week.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will slowly cross the waters through Tuesday morning. High pressure will return for Wednesday and it will remain overhead through the rest of the week.
7 Day Forecast for Marine Location Near Cambridge, MD
Hourly EDIT Helplocation: 38.57, -76.08 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 222004 afdphi area forecast discussion national weather service mount holly nj 404 pm edt Mon jul 22 2019 Synopsis A cold front will slowly make its way offshore through Tuesday, with multiple waves of low pressure riding along it. By Wednesday, that front should push further offshore, with high pressure building in behind it. This large area of high pressure will continue to influence our weather from the middle of this week into the weekend and through beginning of next week. Near term until 6 am Tuesday morning Severe weather and flash flooding threat continues into this evening... storms beginning to pop over eastern pa into northern nj in unstable environment. At the surface, low pressure beginning to develop over eastern pa along a diffuse frontal boundary while in the upper levels shortwave energy associated with deepening upper level trough is approaching from the west. As we head through the late afternoon into early this evening, expect convection to become better organized... Likely taking the form of a line or line segments moving into our eastern pa zones and affecting the i-95 corridor and points S E over nj and the delmarva during roughly the 5-8 pm time frame. Given ml capes of 1500-2000 j kg with effective bulk shear near 35 knots this should allow for line to sustain itself and produce a good potential for severe weather. Damaging winds look to be the biggest threat given modest wind field aloft and steep low level lapse rates which should help to aid in bringing downdrafts to the surface. Do still have concerns that there could be potential for isolate tornadoes with the most likely spot for this being near and north of the front over portions of northern nj along the i-78 i- 80 corridor where winds will be more backed in the low levels. This heightened risk should also extend west into adjacent portion of eastern pa. Finally, flooding flash flooding remains a threat given very high pwats though the one mitigating factor is that storms should be fast moving. By the mid evening, first round of convection should be off to the east with a relative lull in activity likely as low pressure moves east across long island. However the problem is that the trailing front will get hung up across the area with upper level trough still lagging off to the west over the ohio valley. And then by the late evening into the overnight period (11pm - 2am) as more shortwave energy arrives this should result in another wave developing along the front with additional widespread showers and possible embedded storms moving in from the sw. At this time front should be hung up right around the i-95 corridor and it's this area we are particularly concerned about for potentially heavy showers storms overnight as pwats will remain very high with some elevated instability to work with. Thus, flooding flash flooding still a threat especially if heavy rain hits areas that happen to have also gotten hard hit this evening. Severe weather threat by this time will be lower though. It will still be another fairly warm and muggy night near and south of the front across the urban corridor and points S E with lows still only getting down to the low 70s with high dew points as well. It will be cooler north of here though with lows in the 60s. Short term 6 am Tuesday morning through Tuesday night By Tuesday morning, second wave of low pressure will be slowly moving off the new jersey coast and this will help to gradually drag the front farther south finally. As such, expect rain showers continuing into the early morning at least along and south of the i-95 corridor with this activity gradually ending from north to south through the late morning into the afternoon with the frontal passage. Any of this additional rain occuring Tuesday should not be as heavy with diminishing instability but could still exacerbate any flooding issues that could be ongoing from earlier. Not expecting much Sun as area remains under influence of deep upper trough to the west and front only lingers just off the coast. Highs will generally be in the mid to upper 70s and with dew points in the 60s it will certainly feel much more comfortable! forecast becomes a little tricky for late day Tuesday into Tuesday night as yet one more wave may try to develop along front just off the coast and this could bring in another round of rain showers... Mainly for coastal areas. It shouldn't be particularly heavy though. Long term Wednesday through Monday Overview... an extended stretch of mainly dry and seasonable weather is expected for most of this week and into the weekend. At upper levels, a lingering trough will remain over the east from Wednesday into Thursday. This trough will weaken and shift southward through the week as a ridge moves out of the great lakes and builds into southern canada and new england. At the surface, a broad region of high pressure will exist downstream the ridge and upstream the trough. This high will start the midweek period over the midwest, and as the upper level features slowly shift, the high will gradually make its way eastward. It will not crest over our region until the weekend. Even by early next week, we will probably continue to feel the influence of this high. The resulting sensible weather is something we really have not seen much of this year: several consecutive days (at least) of dry and quiet weather. Temperatures also look near normal for this period, as we are between cooler than normal air to the south associated with the lingering trough, and much warmer than normal air that will build in with the ridge well to our north. Dailies... |
Wednesday... Our early week frontal system will still be departing on Wednesday, and it looks like considerable cloud cover and possibly some light showers may linger towards the coast especially in the morning. As a wave of low pressure moves offshore, some guidance is even hinting at an inverted-trough like feature which could throw some light showers back into coastal nj. However, the trend for the day will be clearing skies and drier weather, especially to the west. Temperatures only getting into the low 80s in most areas with the cooler air behind the front. Wednesday night-Saturday... Dry and quiet. A very gradual warming trend in 850mb temperatures should yield a slow warming trend at the surface, with each day generally a degree or two warmer than the previous but no warmer than the upper 80s by Saturday. Dew points should remain comfortable also, with those also showing just a slow uptrend heading towards the weekend but remaining well away from the oppressive territory we have seen. Sunday-Monday... Temperatures should continue coming up slowly during this period, with some 90s potentially returning to the picture. Humidity will also continue to creep up, but . A weak frontal system may approach on Sunday, with possibly some showers up north. However, high pressure still looks to be the dominant feature into early next week, and we will likely have to wait until later in the week to see any more robust frontal systems. Aviation 20z Monday through Saturday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Through 0z... Strong to severe storms likely to affect most terminals during the 20z to 0z time frame. Expect restrictions to ifr or lower with wind gusts of 35-40+ knots possible. Tonight... First round of storms should be off the coast by 0z but additional rounds of showers with possible storms likely for the late evening into the overnight with CIGS to at least MVFR likely by this time to even ifr possible. Tuesday... Rain showers should be tapering off but MVFR restrictions likely to continue for most sites through most of the morning if not into the early afternoon in some places. Outlook... Wednesday... MainlyVFR, except MVFR possible at least through the morning at miv and acy. Winds north-northeast at 5 to 10 kt. Wednesday night-Saturday... An extended period of quiet,VFR conditions is expected. Winds mainly light and variable, favoring light easterly flow if anything. Marine Marginal SCA conditions at times for the coastal waters as low pressure develops over pa then moves off the coast. Bigger story will likely be strong to severe storms moving over the coastal waters (as well as the delaware bay) this evening and these could produce wind gusts of 40-50 knots in the strongest storms. These should be east of the waters by late evening. For Tuesday, SCA level seas likely to continue most of the morning even as winds diminish so SCA runs until noon. Conditions sub SCA by Tuesday night but more rain showers possible with reduced visibilities as front will be stalled over coastal waters. Outlook... Wednesday-Saturday... Winds and seas are expected to remain below sca criteria. 3 to 4 foot seas Wednesday diminish to mainly 2 to 3 feet for the remainder of the period. Rip currents... an increasing southerly wind fetch and building waves are expected to create a moderate risk for the development of dangerous rip currents today along the new jersey shore. The delaware coastline is expected to have a low risk or the development of dangerous rip currents today. Phi watches warnings advisories Pa... Flash flood watch through Tuesday morning for paz054-055- 060>062-070-071-101>106. Heat advisory until 7 pm edt this evening for paz070-071-102- 104-106. Nj... Flash flood watch through Tuesday morning for njz001-007>010- 012>027. Heat advisory until 7 pm edt this evening for njz015>019-021- 023-024. De... Flash flood watch through Tuesday morning for dez001>004. Heat advisory until 7 pm edt this evening for dez001>004. Md... Flash flood watch through Tuesday morning for mdz008-012-015- 019-020. Heat advisory until 7 pm edt this evening for mdz008-012-015- 019-020. Marine... Small craft advisory until noon edt Tuesday for anz450>455. Synopsis... O'brien near term... Fitzsimmons short term... Fitzsimmons long term... O'brien aviation... Fitzsimmons o'brien marine... Fitzsimmons o'brien |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| CA2 - 8571892 - Cambridge, MD | 1 mi | 51 min | 91°F | 89°F | 1007.3 hPa | |||
| 44062 - Gooses Reef, MD | 18 mi | 51 min | SSW 18 G 21 | 91°F | 1008.3 hPa | |||
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 20 mi | 51 min | WSW 13 G 21 | 91°F | 1008.3 hPa | |||
| BISM2 - 8571421 - Bishops Head, MD | 24 mi | 51 min | SSW 7 G 14 | 86°F | 1008.8 hPa | |||
| SLIM2 - 8577330 - Solomons Island, MD | 26 mi | 51 min | WSW 13 G 16 | 90°F | 87°F | 1007.5 hPa | ||
| TPLM2 - Thomas Point, MD | 30 mi | 81 min | SSW 16 G 18 | 89°F | 85°F | 1007.8 hPa (-1.5) | 73°F | |
| 44063 - Annapolis | 33 mi | 27 min | N 9.7 G 14 | 83°F | 87°F | 1007.7 hPa | ||
| CPVM2 | 34 mi | 51 min | 83°F | 72°F | ||||
| APAM2 - 8575512 - Annapolis, MD | 36 mi | 51 min | 85°F | 1007.2 hPa | ||||
| PPTM2 - 8578240 - Piney Point, MD | 39 mi | 51 min | W 11 G 15 | |||||
| LWTV2 - 8635750 - Lewisetta, VA | 45 mi | 51 min | WSW 13 G 17 | 92°F | 89°F | 1008.5 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 45 mi | 51 min | NW 7 G 8.9 | 80°F | 89°F | 1007.9 hPa |
Wind History for Cambridge, MD
(wind in knots) EDIT (on/off) Help| 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 | 4 PM | 5 PM | 6 PM | |
| Last 24hr | S G11 | S | S G7 | SW G11 | SW | W | W G9 | SW | SW | S | S | SW | SW | SW G8 | S | S G11 | S G10 | SW G15 | SW G15 | SW G18 | S G17 | S G15 | S G23 | SW G15 |
| 1 day ago | S | S | S | S G7 | S | S G6 | SW G7 | SW | W | W | SW | SW | W | W G8 | W G14 | NW G15 | NW G16 | W G14 | NW G11 | W | W G13 | SW G12 | W G11 | SW G11 |
| 2 days ago | S | S G9 | S | S | S | S G7 | S G10 | S | SW | SW | SW G7 | W | W G9 | NW | NW | NW | W G8 | NW | NW | N G6 | SW G8 | SW G10 | SW G9 | S G12 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Cambridge-Dorchester Airport, MD | 3 mi | 36 min | SSW 9 G 16 | 10.00 mi | Fair | 90°F | 73°F | 59% | 1007.8 hPa |
| Easton / Newman Field, MD | 16 mi | 35 min | SW 10 | 10.00 mi | Partly Cloudy | 91°F | 73°F | 56% | 1008.8 hPa |
Wind History from ESN (wind in knots)
| 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 | 4 PM | 5 PM | 6 PM | |
| Last 24hr | SW | SW | S | W | SW | NW | SW | W | Calm | Calm | Calm | Calm | Calm | Calm | S | S | SW | SW | S | S | SW G19 | SW G20 | SW G18 | SW |
| 1 day ago | SW | SW | S | S | S | Calm | S | Calm | Calm | W | Calm | Calm | Calm | Calm | W | NW G14 | W | NW | W | W | SW | SW | S | SW |
| 2 days ago | S | S | S | S | S | S | S | S | S | SW | SW | SW | Calm | Calm | NW | NW | W | NW | W | SW | SW | SW | SW | SW |
Tide / Current Tables for Cambridge, Choptank River, Maryland
EDIT Weekend mode (on/off) (on/off) Help One Week of DataCambridge
Click for Map
Mon -- 02:25 AM EDT 0.54 feet Low Tide
Mon -- 05:57 AM EDT Sunrise
Mon -- 08:27 AM EDT 2.03 feet High Tide
Mon -- 11:09 AM EDT Moonset
Mon -- 03:04 PM EDT 0.44 feet Low Tide
Mon -- 08:23 PM EDT Sunset
Mon -- 09:00 PM EDT 1.85 feet High Tide
Mon -- 11:47 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:25 AM EDT 0.54 feet Low Tide
Mon -- 05:57 AM EDT Sunrise
Mon -- 08:27 AM EDT 2.03 feet High Tide
Mon -- 11:09 AM EDT Moonset
Mon -- 03:04 PM EDT 0.44 feet Low Tide
Mon -- 08:23 PM EDT Sunset
Mon -- 09:00 PM EDT 1.85 feet High Tide
Mon -- 11:47 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 0.7 | 0.6 | 0.6 | 0.8 | 1.1 | 1.5 | 1.8 | 2 | 2 | 1.8 | 1.5 | 1.1 | 0.8 | 0.5 | 0.4 | 0.5 | 0.8 | 1.1 | 1.5 | 1.8 | 1.8 | 1.8 | 1.5 |
Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
EDIT (on/off) Help One Week of DataCove Point (1.1 mi. NE of)
Click for Map
Mon -- 01:39 AM EDT -0.34 knots Max Ebb
Mon -- 04:08 AM EDT 0.00 knots Slack
Mon -- 05:59 AM EDT Sunrise
Mon -- 07:03 AM EDT 0.47 knots Max Flood
Mon -- 10:09 AM EDT -0.00 knots Slack
Mon -- 11:10 AM EDT Moonset
Mon -- 01:56 PM EDT -0.57 knots Max Ebb
Mon -- 05:04 PM EDT 0.00 knots Slack
Mon -- 07:55 PM EDT 0.50 knots Max Flood
Mon -- 08:24 PM EDT Sunset
Mon -- 11:37 PM EDT -0.00 knots Slack
Mon -- 11:48 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 01:39 AM EDT -0.34 knots Max Ebb
Mon -- 04:08 AM EDT 0.00 knots Slack
Mon -- 05:59 AM EDT Sunrise
Mon -- 07:03 AM EDT 0.47 knots Max Flood
Mon -- 10:09 AM EDT -0.00 knots Slack
Mon -- 11:10 AM EDT Moonset
Mon -- 01:56 PM EDT -0.57 knots Max Ebb
Mon -- 05:04 PM EDT 0.00 knots Slack
Mon -- 07:55 PM EDT 0.50 knots Max Flood
Mon -- 08:24 PM EDT Sunset
Mon -- 11:37 PM EDT -0.00 knots Slack
Mon -- 11:48 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| -0.2 | -0.3 | -0.3 | -0.2 | -0 | 0.2 | 0.4 | 0.5 | 0.4 | 0.3 | 0 | -0.2 | -0.4 | -0.5 | -0.6 | -0.5 | -0.3 | -0 | 0.3 | 0.4 | 0.5 | 0.4 | 0.3 | 0.1 |
Weather Map and Satellite Images
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GOES 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 (18,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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 numerious 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. |