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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 7:14AM | Sunset 4:45PM | Saturday December 15, 2018 6:44 PM EST (23:44 UTC) | Moonrise 12:40PM | Moonset 12:00AM | Illumination 59% |  |
ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 639 Pm Est Sat Dec 15 2018
.small craft advisory in effect through Sunday morning...
Tonight..NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain. A slight chance of tstms this evening, then drizzle after midnight. Patchy fog. Vsby 1 to 3 nm.
Sun..N winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft. Occasional rain or drizzle. Patchy fog. Vsby 1 to 3 nm.
Sun night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon night..NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Tue..NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..S winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day, then showers through the night. Winds and waves higher and visibilities lower in and near tstms.
.small craft advisory in effect through Sunday morning...
Tonight..NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain. A slight chance of tstms this evening, then drizzle after midnight. Patchy fog. Vsby 1 to 3 nm.
Sun..N winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft. Occasional rain or drizzle. Patchy fog. Vsby 1 to 3 nm.
Sun night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon night..NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Tue..NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..S winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day, then showers through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 639 Pm Est Sat Dec 15 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will move over the waters through Sunday, then move offshore by Sunday night. A cold front approaching from the great lakes will cross the waters by late Monday. High pressure will follow through Wednesday. Small craft advisories will likely be needed for portions of the waters Sunday night through Tuesday.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will move over the waters through Sunday, then move offshore by Sunday night. A cold front approaching from the great lakes will cross the waters by late Monday. High pressure will follow through Wednesday. Small craft advisories will likely be needed for portions of the waters Sunday night through Tuesday.
7 Day Forecast for Marine Location Near Oxford, MD
Hourly EDIT Helplocation: 38.68, -76.17 debug
Area Discussion for - Baltimore, MD/Washington
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 klwx 152139 afdlwx area forecast discussion national weather service baltimore md washington dc 439 pm est Sat dec 15 2018 Synopsis Low pressure will pass to the south and out to sea through Sunday. A cold front approaching from the great lakes will cross the mid-atlantic Monday. High pressure will follow through Wednesday, before another large area of low pressure approaches from the tennessee valley Thursday into Friday. Near term until 6 am Sunday morning 330 pm update: trimmed the flood watch back a bit, canceling for portions of central virginia (i-64 corridor) over to southern maryland where additional rainfall is not expected to cause renewed flooding (heaviest axis of rain and ongoing flooding is to the north). Rain is already starting to fill back in after the aforementioned lull. The rest of the forecast appears on track. Brief lull in the steadiest rain being observed across most of the area this afternoon with mid-level dry slot moving overhead and surface low pressure system (wave one) moving offshore. Upper low attendant surface reflection and steeper mid-level lapse rates frontogenesis result in an increase in steadier rain again this evening. The most persistent rain and chance for embedded heavier convective elements is most likely along an axis near and north of us-50, where an additional 1-2 inches of rain is likely through tonight. Therefore, will continue with the flood watch given saturated ground and streams and creeks already running high from last night and this morning's rainfall. Isolated rainfall rates of one inch per hour are possible, but should be brief (not last for an entire hour) in any embedded convective elements or isolated thunderstorms. Precipitation should become notably lighter in intensity after midnight as the best forcing from the upper low begins to lift to the north and east, but continued moist easterly flow is expected to result in at least patchy light rain and drizzle through the remainder of the overnight. Hi-res guidance has temperatures falling to near freezing by daybreak near and above 3000 feet, with a chance of freezing rain over over these locations after 4am. Have issued a winter weather advisory to account for this, which continues through much of Sunday. Short term 6 am Sunday morning through Monday night Low pressure continues departing to the east Sunday, with residual onshore flow moist low-level resulting in a continuation of occasional rain or drizzle, before northwest flow begins to dry us out by later tomorrow. Temperatures should remain largely above freezing in the lower elevations, but if clouds clear out enough prior to dawn and winds remain light, could see a few readings around freezing, causing some isolated icy patches first thing Monday morning. Monday looks to be a breezy day as a dry cold front (forced by northern stream shortwave energy) dives southeast from the great lakes and crosses the area during the day. Winds could gust up to 30 mph, and temperatures should respond by falling below freezing area-wide Monday night. By this time, however, any wet surfaces should have dried since rain will have ended 24+ hours prior and wind should help dry things out as well. Long term Tuesday through Saturday During the middle of the week, a ridge of high pressure will extend from the surface through 250 mb. Therefore, anticipating mostly sunny to sunny skies Wednesday. With 850 mb temperatures near 4 or 5c, temperatures should be a pinch cooler than normal (mid-upper 40). Mid-high clouds will start spreading across the skies Wednesday night as a jet MAX approaches ahead of the next trough axis. This will result in mostly cloudy conditions by dawn Thursday. For the end of the week, a trough axis will be steepening near the mississippi valley, and sweeping across the eastern seaboard Friday- Saturday-- a similar setup to what we're experiencing currently. This consequently develops a cut off low in the midwest upper ohio valley... And could spawn cyclogenesis somewhere in the southeastern united states. While the details still need to be sorted out, it would lead to another wet Thursday-Saturday. At the present time, Thursday night into Friday may be the wettest period... Subject to change, of course. Thermally speaking, most of this precipitation would fall as rain. However, will need to watch the evolution to see how quickly cold air wraps around the back side of the low vs precipitation exits. If cold air comes in quick enough, then there could be some mixed precipitation at the end of the forecast period. Aviation 22z Saturday through Thursday Ifr lifr expected into Sunday, gradually improving Sunday night beforeVFR returns solidly by Monday. N flow 10 kts or less, but a few gusts 15-20 kts possible this evening. Llws likely tonight with increasing E flow to 35-40 kts around 2-3kft. Nw winds could gust 25-30 kts Monday, with gustiness possible again Tuesday (likely lighter for a time Monday night with less mixing). OtherwiseVFR expected. Vfr conditions anticipated for Wednesday, but CIGS may drop Thursday |
as precip approaches. Flight restrictions possible. Marine Sca for most waters tonight. Bufkit soundings show marginal mixing up to about 1000 feet above the surface where winds are 25+ kts. A lull in the winds is likely Sunday as the gradient relaxes when low pressure makes its closest approach, before nw flow increase Sunday night into Monday. Winds will be reinvigorated behind a dry cold front late Monday, lingering into Tuesday. Can't rule out a few gusts to near gale force during this time. Winds anticipated to be light wed. In the return flow thu, the gradient does increase, but suspect mixing will be poor. Hydrology About 1-2" of rainfall was observed overnight last night into this morning, with another 1-2" likely this evening and overnight, especially near and north of us-50. Minor flooding being observed in the western dc suburbs as well as portions of eastern WV western md. Elsewhere, streams and creeks remain elevated, so any additional rain will likely result in renewed flooding concerns through tonight. Tides coastal flooding Water levels running around a 1 1 4 ft above normal this afternoon. However, a low astronomical tide has precluded any flooding issues thus far. While continued northeast flow fvrbl for piling water into the mouth of the chesapeake bay, they are not favorable for driving water into the maryland portion of the bay. Therefore, will be continuing with forecasts suggesting nothing higher than action stage through the weekend, primarily at straits point, although will be including annapolis for the Sunday night and Monday tide cycles. We will also be monitoring the combination of rainfall and snowmelt across the area this weekend. The resultant rises on area rivers likely to pass through georgetown somewhere in the Monday timeframe... Possibly causing inundation from freshwater influx. Climate Rainfall totals continue to creep upward, with baltimore md and washington dc setting the annual record already. Here are the current rankings for wettest year on record (through 4 pm december 15th): washington dc area (dca) 1. 62.32 inches (2018) 2. 61.33 inches (1889) weather records for the washington dc area have been kept at what is now ronald reagan washington national airport (dca) since 1945. Precipitation records observed downtown extend the period of record back to 1871. Baltimore md area (bwi) 1. 66.91 inches (2018) 2. 62.66 inches (2003) weather records for the baltimore md area have been kept at what is now baltimore-washington international thurgood marshall airport (bwi) since 1950. Precipitation records observed downtown extend the period of record back to 1871. Dulles va area (iad) 1. 65.67 inches (2003) 2. 63.09 inches (2018) 3. 59.05 inches (1972) weather records have been kept at what is now washington dulles international airport (iad) since 1960. Note: all climate data are considered preliminary until reviewed by the national centers for environmental information (ncei). Lwx watches warnings advisories Dc... Flood watch through late tonight for dcz001. Md... Flood watch through late tonight for mdz003>006-011-013-014- 501>508. Winter weather advisory from 4 am to 7 pm est Sunday for mdz501. Va... Flood watch through late tonight for vaz025>031-038>040- 050>055-501-502-505>508. Wv... Flood watch through late tonight for wvz050>053-055-501>506. Winter weather advisory from 4 am to 7 pm est Sunday for wvz501-503-505. Marine... Small craft advisory until 9 am est Sunday for anz530>533- 538>541. Small craft advisory until 6 pm est this evening for anz535. Small craft advisory until midnight est tonight for anz534-536- 537-542-543. Synopsis... Dhof near term... Dhof short term... Dhof long term... Hts aviation... Hts dhof marine... Hts dhof hydrology... Dhof tides coastal flooding... Hts climate... Lwx |
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 | 9 mi | 63 min | 52°F | 42°F | 1014.1 hPa | |||
| TPLM2 - Thomas Point, MD | 21 mi | 45 min | N 14 G 15 | 49°F | 42°F | 1015.4 hPa (+0.6) | 49°F | |
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 22 mi | 63 min | Calm G 5.1 | 52°F | 1014.5 hPa | |||
| CPVM2 | 25 mi | 63 min | 47°F | 47°F | ||||
| APAM2 - 8575512 - Annapolis, MD | 27 mi | 57 min | 51°F | 1014.5 hPa | ||||
| BSLM2 - Chesapeake Bay, MD | 29 mi | 135 min | NE 2.9 | 52°F | 1014 hPa | 51°F | ||
| SLIM2 - 8577330 - Solomons Island, MD | 29 mi | 57 min | E 11 G 12 | 48°F | 44°F | 1012.2 hPa | ||
| BISM2 - 8571421 - Bishops Head, MD | 33 mi | 63 min | E 11 G 13 | 49°F | 46°F | 1013.6 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 37 mi | 57 min | ENE 6 G 12 | 52°F | 43°F | 1015.6 hPa | ||
| PPTM2 - 8578240 - Piney Point, MD | 42 mi | 63 min | ESE 11 G 12 | |||||
| FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 42 mi | 63 min | NE 13 G 15 | 51°F | 1015.3 hPa | |||
| FSNM2 | 42 mi | 63 min | NE 16 G 21 | 52°F | 1015 hPa | |||
| BLTM2 - 8574680 - Baltimore, MD | 46 mi | 63 min | E 12 G 17 | 53°F | 43°F | 1015.2 hPa | ||
| 44042 - Potomac, MD | 46 mi | 45 min | ENE 7.8 G 9.7 | 48°F | 43°F | 1012.4 hPa (+0.5) | ||
| WASD2 - 8594900 - Washington, DC | 47 mi | 57 min | ENE 4.1 G 8 | 53°F | 40°F | 1014.7 hPa | ||
| DRSD1 - Delaware Reserve, DE | 48 mi | 195 min | NNE 5.1 | 51°F | 1016 hPa | 51°F |
Wind History for Cambridge, MD
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
| 1 day ago | ||||||||||||||||||||||||
| 2 days ago |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Easton / Newman Field, MD | 10 mi | 55 min | NE 11 G 17 | 10.00 mi | Overcast | 55°F | 53°F | 94% | 1015.2 hPa |
| Cambridge-Dorchester Airport, MD | 12 mi | 65 min | Var 3 G 16 | 10.00 mi | Overcast | 55°F | 53°F | 94% | 1013.5 hPa |
| Bay Bridge Field, MD | 22 mi | 65 min | ENE 5 | 5.00 mi | Overcast with Haze | 52°F | 0°F | % | 1014.9 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 | Calm | N | NE | NE | NE | E | E | E | NE | NE | NE | NE | NE | NE | NE | NE | NE | N | NE | NE | NE G14 | NE G14 | E | NE G17 |
| 1 day ago | E | Calm | Calm | E | E | E | Calm | E | NE | Calm | NE | Calm | Calm | Calm | E | S | NW | Calm | NE | NE | N | N | Calm | |
| 2 days ago | Calm | S | Calm | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | S | S | SE | SW | S | E |
Tide / Current Tables for Oxford, Tred Avon River, Maryland
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of DataOxford
Click for Map
Sat -- 03:53 AM EST 0.03 feet Low Tide
Sat -- 06:49 AM EST First Quarter
Sat -- 07:15 AM EST Sunrise
Sat -- 09:24 AM EST 1.02 feet High Tide
Sat -- 12:39 PM EST Moonrise
Sat -- 03:32 PM EST 0.21 feet Low Tide
Sat -- 04:44 PM EST Sunset
Sat -- 09:27 PM EST 1.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 03:53 AM EST 0.03 feet Low Tide
Sat -- 06:49 AM EST First Quarter
Sat -- 07:15 AM EST Sunrise
Sat -- 09:24 AM EST 1.02 feet High Tide
Sat -- 12:39 PM EST Moonrise
Sat -- 03:32 PM EST 0.21 feet Low Tide
Sat -- 04:44 PM EST Sunset
Sat -- 09:27 PM EST 1.30 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 | 0.5 | 0.2 | 0.1 | 0 | 0.1 | 0.3 | 0.6 | 0.9 | 1 | 1 | 0.9 | 0.7 | 0.5 | 0.3 | 0.2 | 0.2 | 0.3 | 0.6 | 0.9 | 1.1 | 1.3 | 1.3 | 1.1 |
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
Sat -- 02:43 AM EST -0.56 knots Max Ebb
Sat -- 05:51 AM EST 0.00 knots Slack
Sat -- 06:49 AM EST First Quarter
Sat -- 07:15 AM EST Sunrise
Sat -- 08:46 AM EST 0.49 knots Max Flood
Sat -- 12:37 PM EST -0.00 knots Slack
Sat -- 12:40 PM EST Moonrise
Sat -- 03:31 PM EST -0.34 knots Max Ebb
Sat -- 04:45 PM EST Sunset
Sat -- 06:04 PM EST 0.00 knots Slack
Sat -- 08:42 PM EST 0.36 knots Max Flood
Sat -- 11:38 PM EST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:43 AM EST -0.56 knots Max Ebb
Sat -- 05:51 AM EST 0.00 knots Slack
Sat -- 06:49 AM EST First Quarter
Sat -- 07:15 AM EST Sunrise
Sat -- 08:46 AM EST 0.49 knots Max Flood
Sat -- 12:37 PM EST -0.00 knots Slack
Sat -- 12:40 PM EST Moonrise
Sat -- 03:31 PM EST -0.34 knots Max Ebb
Sat -- 04:45 PM EST Sunset
Sat -- 06:04 PM EST 0.00 knots Slack
Sat -- 08:42 PM EST 0.36 knots Max Flood
Sat -- 11:38 PM EST -0.00 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 |
| -0.2 | -0.4 | -0.5 | -0.6 | -0.5 | -0.2 | 0 | 0.3 | 0.5 | 0.5 | 0.4 | 0.3 | 0.1 | -0.1 | -0.2 | -0.3 | -0.3 | -0.2 | -0 | 0.2 | 0.3 | 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 Baltimore, MD/Washington (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. |