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Marine Weather and Tides
Version 3.4 |
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 7:12AM | Sunset 5:18PM | Wednesday January 27, 2021 8:10 PM EST (01:10 UTC) | Moonrise 4:08PM | Moonset 6:37AM | Illumination 100% | ![]() |
ANZ530 Chesapeake Bay North Of Pooles Island- 643 Pm Est Wed Jan 27 2021
.small craft advisory in effect from midnight tonight to 6 am est Thursday...
.gale warning in effect from 6 am est Thursday through Thursday afternoon...
.small craft advisory in effect from Thursday evening through late Thursday night...
Tonight..N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Thu..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Thu night..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Fri..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Fri night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
Sat night..NE winds around 5 kt. Waves 1 ft or less.
Sun..NE winds 5 to 10 kt. Waves 1 ft. Snow, then snow and rain after midnight.
Mon..N winds 10 to 15 kt. Waves 1 to 2 ft. Snow and rain .
.small craft advisory in effect from midnight tonight to 6 am est Thursday...
.gale warning in effect from 6 am est Thursday through Thursday afternoon...
.small craft advisory in effect from Thursday evening through late Thursday night...
Tonight..N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Thu..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Thu night..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Fri..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Fri night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
Sat night..NE winds around 5 kt. Waves 1 ft or less.
Sun..NE winds 5 to 10 kt. Waves 1 ft. Snow, then snow and rain after midnight.
Mon..N winds 10 to 15 kt. Waves 1 to 2 ft. Snow and rain .
ANZ500 643 Pm Est Wed Jan 27 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure may impact the waters tonight and Thursday. High pressure will return late in the week into the first part of the weekend. Another storm system may impact the region late in the weekend into early next week.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure may impact the waters tonight and Thursday. High pressure will return late in the week into the first part of the weekend. Another storm system may impact the region late in the weekend into early next week.
7 Day Forecast for Marine Location Near Millington, MD
Hourly EDIT Help
location: 39.26, -75.84 debug
Area Discussion for - Philadelphia/Mount Holly, PA
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS61 KPHI 280030 AFDPHI
Area Forecast Discussion National Weather Service Mount Holly NJ 730 PM EST Wed Jan 27 2021
SYNOPSIS. A low pressure system will shift further off the Carolina coast into tomorrow. High pressure, bringing cold air, will build into our region through Saturday night. Another low pressure system is forecast to pass just south of our region Sunday night through Monday.
NEAR TERM /THROUGH THURSDAY/. No big changes so far this evening to the forecast, except to increase cloud cover for the next several hours as clouds have been slow to dissipate across the area. Lower clouds may still dissipate some later this evening, however, there will also be an increase in mid to high level cloudiness overnight.
As we go into the overnight period, a low pressure system will move from the Carolinas eastward off the coast as it rapidly strengthens. The storm will pass far enough to our south keeping the region free from precip. Also, as high pressure moves from central Canada south and east towards the upper Midwest this will result in a strengthening pressure gradient helping drive arctic air towards the region. Lows will be mainly in the 20s except teens over the southern Poconos.
For Thursday, the aformentioned low continues to rapidly deepen south and east of the area off the coast while high pressure continues to build south into the Midwest. This will keep the pressure gradient strong and if anything it should actually tighten. The result will be a very windy day as arctic air moves across the region in a cold advection pattern so temperatures will be cold and not going up too much with highs mainly in the upper 20s to mid 30s. However with NW winds 15 to 25 gusting 25 to 35 mph it will feel much colder than this! The good news is that following morning cloud cover it should start to clear in the afternoon as the storm over the ocean pulls away.
SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/. The main story through the short term will be the windy and cold conditions. Through much of this period, we will be stuck in between the departing low (shifting further east off the Carolina coast) and the high building south over the western Great Lakes. Central MSP in the high is expected to be an impressive 1040 mb. Not surprisingly, we will have a tight pressure gradient over our region Thursday night into Friday.
At this point, I've kept the forecast below wind advisory as the tightest pressure gradient is likely to occur late Thursday night into Friday morning. Model soundings depict the peak winds in the mixing layer right at 40 kt, so it is unlikely that we will have efficient enough mixing, especially given the time of day, to reach wind advisory criteria.
Regardless of the exact wind speeds, it will be cold. With Friday possibly being the coldest day of the season so far. Even with a blend of guidance, it appears that most, if not all, of the region will be below freezing on Friday. Some slight air mass modification on Saturday means temperatures may be a few degrees higher, but still well below normal.
LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. The big story in the long term remains the low pressure system Sunday into late Monday, which could be a classic
What has changed: No major changes with this forecast update. Guidance came in to some better agreement with the track of the low, but even with the minor differences, could result in significant changes as far as impacts to our region. Thus, for the latest forecast update, stayed close to the previous forecast and a blend of guidance.
Timing: There are still some large differences between models with the timing of this system. Precipitation could come in as early as Sunday afternoon, and could linger as late as Tuesday, depending on how progressive the system is.
Precipitation type: As mentioned above, the track will be a big factor in the ultimate impacts for our region, especially with regards to precipitation type. The closer the low gets to our region, the more likely we are see wintry mix across the region. If the track is further south, as some of the operational models are trending, it could be more snow.
Precipitation amounts: We won't have a better idea on precipitation amounts through this event until at least Saturday.
Other hazards: As is often the case with coastal lows, winds could be a concern, especially near the coast. given the differences in timing and tracks, a blend of guidance will tend to smooth out the peak gusts in these situations, so have gone above guidance with winds, primarily on Monday which looks like it could be the peak of the winds. For now though, this is still below wind advisory levels.
Tuesday and Wednesday . Once the coastal low clears out, tranquil but cool weather looks to prevail over our region through mid week.
AVIATION /00Z THURSDAY THROUGH MONDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Tonight . VFR conditions will persist, with occasional MVFR ceilings at ABE and TTN early. North to northwest winds 5-10 knots, occasional gusts 15-20 knots, especially late. High confidence.
Thursday . VFR conditions expected. Northwest winds increasing to 15 to 20 knots gusting 25 to 30 knots by late morning into the afternoon.
Outlook .
Friday . VFR conditions expected. Northwesterly winds 15-30 kt with gusts up to 35 kt. High confidence on the overall pattern, but moderate confidence on the peak winds.
Saturday . VFR conditions expected. Northwest winds 10-15 kt with gusts up to 20 kt. Moderate confidence.
Sunday and Monday . Starting VFR, but could see MVFR and even IFR conditions develop as early as Sunday afternoon with a storm system passing just south of our region. MVFR and IFR conditions are likely to continue for much of the day Monday. Visibility restrictions with precipitation are likely for at least part of this period, but still uncertainty as to what type of precipitation we will see.
MARINE. NW winds will occasional gust 20 to 25 knots but otherwise conditions should below advisory levels this evening and overnight. Winds increase again toward daybreak Thursday, with gusts of Gale force expected for Thursday as NW winds gust 35 to 40 knots.
Outlook .
Thursday night and Friday . Northwesterly gales continue through this time. Additionally, freezing spray will be possible on all the waters.
Friday night through Saturday . Winds should gradually diminish, dropping below 25 kt by mid day Saturday. Freezing spray will also be possible through Saturday morning.
Sunday . Winds and seas should be below SCA criteria.
Sunday night and Monday . Winds will increase and shift from northerly to northeasterly. Gale gusts are possible on Monday.
PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Gale Warning from 7 AM Thursday to 6 PM EST Friday for ANZ430- 431-450>455.
Synopsis . Johnson Near Term . Fitzsimmons/Robertson Short Term . Johnson Long Term . Johnson Aviation . Fitzsimmons/Johnson/Robertson Marine . Fitzsimmons/Johnson
Weather Reporting Stations
EDIT (on/off)  Help NOTE: Click on distance to see the station location on a mapStations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
DRSD1 - Delaware Reserve, DE | 24 mi | 40 min | NW 1 | 33°F | 1021 hPa | 29°F | ||
TPLM2 - Thomas Point, MD | 40 mi | 70 min | NW 8.9 G 9.9 | 39°F | 39°F | 1021.2 hPa (+1.7) | 25°F |
Wind History for Chesapeake City, MD
(wind in knots) EDIT (on/off)  Help8 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 | N | NE | N | W | SW | W | NW | W | W | W | NW | NW | NW | NW G11 | NW | NW G10 | N G13 | N G16 | NW G19 | NW G12 | N G12 | N G9 | N | N |
1 day ago | S | S | NW | SW | E | E | NE | NE | NE | E G6 | E | NE | -- | NE | E | NE | E | E G10 | E | E | NE | N | N | NW |
2 days ago | NW | NW | N | -- | -- | SE | E | SW | -- | NE | N | SE | E | E | E | N | NE | -- | NW | -- | S | -- | E | SE |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Link to 5 minute data for KDOV
Wind History from DOV (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 24hr | NE | Calm | N | Calm | SW | S | NW | Calm | NE | NE | NE | NE | NE | NE | N | NE | NE | NE | NE | NE | ||||
1 day ago | W | W | W | W | Calm | N | Calm | Calm | Calm | W | N | N | Calm | N | NE | NE | N | Calm | Calm | Calm | ||||
2 days ago | W G19 |
Tide / Current Tables for Millington, Maryland
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataMillington
Click for Map
Wed -- 03:14 AM EST -0.03 feet Low Tide
Wed -- 06:37 AM EST Moonset
Wed -- 07:14 AM EST Sunrise
Wed -- 07:18 AM EST 0.93 feet High Tide
Wed -- 01:50 PM EST -0.65 feet Low Tide
Wed -- 04:07 PM EST Moonrise
Wed -- 05:18 PM EST Sunset
Wed -- 08:11 PM EST 2.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 03:14 AM EST -0.03 feet Low Tide
Wed -- 06:37 AM EST Moonset
Wed -- 07:14 AM EST Sunrise
Wed -- 07:18 AM EST 0.93 feet High Tide
Wed -- 01:50 PM EST -0.65 feet Low Tide
Wed -- 04:07 PM EST Moonrise
Wed -- 05:18 PM EST Sunset
Wed -- 08:11 PM EST 2.12 feet High Tide
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 |
0.8 | 0.4 | 0.1 | -0 | 0 | 0.4 | 0.7 | 0.9 | 0.9 | 0.7 | 0.4 | -0 | -0.3 | -0.6 | -0.6 | -0.4 | 0 | 0.7 | 1.4 | 1.9 | 2.1 | 2.1 | 1.8 | 1.5 |
Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
EDIT (on/off)  Help One Week of DataChesapeake and Delaware Canal
Click for Map
Wed -- 01:54 AM EST 0.01 knots Slack
Wed -- 05:37 AM EST 1.85 knots Max Flood
Wed -- 06:38 AM EST Moonset
Wed -- 07:14 AM EST Sunrise
Wed -- 07:54 AM EST -0.02 knots Slack
Wed -- 11:37 AM EST -2.30 knots Max Ebb
Wed -- 03:29 PM EST 0.01 knots Slack
Wed -- 04:06 PM EST Moonrise
Wed -- 05:17 PM EST Sunset
Wed -- 06:31 PM EST 2.20 knots Max Flood
Wed -- 10:01 PM EST -0.08 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:54 AM EST 0.01 knots Slack
Wed -- 05:37 AM EST 1.85 knots Max Flood
Wed -- 06:38 AM EST Moonset
Wed -- 07:14 AM EST Sunrise
Wed -- 07:54 AM EST -0.02 knots Slack
Wed -- 11:37 AM EST -2.30 knots Max Ebb
Wed -- 03:29 PM EST 0.01 knots Slack
Wed -- 04:06 PM EST Moonrise
Wed -- 05:17 PM EST Sunset
Wed -- 06:31 PM EST 2.20 knots Max Flood
Wed -- 10:01 PM EST -0.08 knots Slack
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 |
-1.3 | -0.9 | 0.3 | 1 | 1.4 | 1.8 | 1.8 | 1.4 | -0.5 | -1.5 | -2 | -2.3 | -2.3 | -2 | -1.6 | -0.9 | 1 | 1.8 | 2.1 | 2.2 | 1.8 | 1.3 | 0.2 | -1.1 |
Weather Map
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GEOS Local Image of 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
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