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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 5:59AM | Sunset 8:28PM | Monday July 22, 2019 6:37 PM EDT (22:37 UTC) | Moonrise 10:49PM | Moonset 10:11AM | Illumination 67% |  |
ANZ533 Chesapeake Bay From North Beach To Drum Point- 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 20 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..NW winds 5 to 10 kt. Gusts up to 20 kt until late afternoon. Waves 2 ft. Showers with a chance of tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..E winds 5 kt. Waves less than 1 ft.
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 20 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..NW winds 5 to 10 kt. Gusts up to 20 kt until late afternoon. Waves 2 ft. Showers with a chance of tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..E winds 5 kt. Waves less than 1 ft.
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 Long Beach, MD
Hourly EDIT Helplocation: 38.47, -76.47 debug
Area Discussion for - Baltimore, MD/Washington
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 klwx 221818 afdlwx area forecast discussion national weather service baltimore md washington dc 218 pm edt Mon jul 22 2019 Synopsis A cold front will slowly move southeastward across the mid- atlantic through Tuesday morning. High pressure will build north of the region through the remainder of the week. Near term through tonight Hot, humid and unstable conditions are in place this afternoon. 2-6 km agl winds are increasing to 30-40 kts, favorable for linear segments producing damaging wind gusts, a few of which could be significant. Frequent lightning and flash flooding from heavy rain are also threats with any thunderstorms that develop this afternoon and evening. Multiple rounds of showers and thunderstorms are expected. Precipitation will transition to periods of moderately heavy showers with a few embedded thunderstorms overnight. Any additional rainfall may worsen any ongoing flooding conditions by this point. Short term Tuesday through Wednesday night The cold front will push southeastward on Tuesday. Showers will likely linger into the morning for much of the region, but clearing is expected to commence by afternoon and low-level dry air spills into the region. High temperatures will likely struggle to each 80 degrees, nearly 25 degrees cooler than Sunday, due to cloud cover and expected precipitation. Near to slightly below normal temperatures and noticeably lower humidity are expected through the middle of the week as high pressure builds to the north. Long term Thursday through Monday The long term period of the forecast will feature an extended period of pleasant weather, with dry conditions, ample sunshine, low humidity levels, and below to near normal temperatures for late july. As the mid-upper level trough responsible for today's active weather departs off to the east on Thursday, heights will rise aloft, and surface high pressure will start to build in from the west. The area of high pressure will move overhead Friday and Saturday, before sliding offshore Sunday. Other than a few passing fair weather clouds, each day should feature near wall to wall sunshine. Temperatures will gradually moderate from below normal, to near normal, with highs in the low to mid 80s on Thursday and highs in the upper 80s to near 90 by Sunday. Low temperatures will start off in the 50s and 60s on Thursday morning, and moderate to the 60s to near 70 by Sunday morning. Humidity levels will remain relatively low, with dewpoints starting in the upper 50s to near 60 on Thursday, then gradually climbing into the mid 60s by Sunday. Aviation 18z Monday through Saturday Ifr likely in any heavier thunderstorms this afternoon and evening, but ifr should be brief, and will subsequently be handled with amendments once storms develop. Any thunderstorms may be capable of producing very gusty winds and frequent lightning. Otherwise, SW flow 10g20 kts this afternoon. Prevailing MVFR likely overnight with periods of showers and a few thunderstorms.VFR expected by later Tuesday morning through Wednesday in NW flow. Vfr conditions will persist through the long term period, as high |
pressure dominates our weather. Marine Sca gusts likely ahead of a cold front through this evening, with much higher gusts possible in and near thunderstorms. Sca in NW flow again for parts of the waters behind the front Tuesday morning, then sub-sca and dry through mid to late week. A prolonged stretch of precipitation free conditions and sub-sca level winds is expected through the middle to latter portions of the upcoming week. Hydrology High pwats of 2-2.25 inches are expected this afternoon into tonight ahead of a slowly approaching cold front. Steering flow will be parallel to the boundary, and with mid-level height falls moving overtop of persistent and excessively humid low- levels, re-generative thunderstorms capable of very heavy rain seem likely. The exact placement is still somewhat uncertain, but it seems most likely that these factors will all come together across northern central md, the eastern WV panhandle and portions of northern virginia into the shenandoah valley and potomac highlands where synoptic lift from the surface front trough approaching from the north will overlay higher instability airmass to the south. Areal average rainfall of 1-1.5 inches is expected for much of the mid-atlantic, but isolated totals in excess of 3 or 4 inches (maybe more) are possible. Due to the convective nature of this system, much of this rain may fall in a short amount of time, resulting in the risk for flash flooding. Lwx watches warnings advisories Dc... Flash flood watch through late tonight for dcz001. Md... Flash flood watch through late tonight for mdz501-502. Flash flood watch through late tonight for mdz003>006-011-013- 014-503>508. Heat advisory until 7 pm edt this evening for mdz017-018. Va... Flash flood watch through late tonight for vaz025>027-029-030- 038>040-051-501>504-507-508. Flash flood watch through late tonight for vaz028-031-052>054- 505-506. Wv... Flash flood watch through late tonight for wvz050-055-501>506. Flash flood watch through late tonight for wvz051>053. Marine... Small craft advisory until 10 pm edt this evening for anz532- 533-540>542. Small craft advisory until 10 pm edt this evening for anz530- 531-535-536-538-539. Small craft advisory from 8 am to noon edt Tuesday for anz533- 541. Small craft advisory until noon edt Tuesday for anz534-537-543. Synopsis... Dhof near term... Dhof short term... Dhof long term... Kjp aviation... Dhof kjp marine... Dhof kjp hydrology... 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 Temp | Water Temp | Waves | Pressure | DewPt |
| 44062 - Gooses Reef, MD | 7 mi | 67 min | SSW 18 G 21 | 91°F | 1008.3 hPa | |||
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 7 mi | 67 min | WSW 13 G 21 | 91°F | 1008.3 hPa | |||
| SLIM2 - 8577330 - Solomons Island, MD | 10 mi | 67 min | WSW 13 G 16 | 90°F | 87°F | 1007.5 hPa | ||
| CA2 - 8571892 - Cambridge, MD | 22 mi | 67 min | 91°F | 89°F | 1007.3 hPa | |||
| PPTM2 - 8578240 - Piney Point, MD | 23 mi | 67 min | W 11 G 15 | |||||
| BISM2 - 8571421 - Bishops Head, MD | 29 mi | 67 min | SSW 7 G 14 | 86°F | 1008.8 hPa | |||
| TPLM2 - Thomas Point, MD | 30 mi | 37 min | W 13 G 15 | 83°F | 85°F | 1008.8 hPa (-0.0) | 72°F | |
| NCDV2 | 32 mi | 67 min | WSW 11 G 15 | 89°F | 1007.4 hPa | |||
| LWTV2 - 8635750 - Lewisetta, VA | 33 mi | 67 min | WSW 13 G 17 | 92°F | 89°F | 1008.5 hPa | ||
| 44063 - Annapolis | 34 mi | 37 min | NW 9.7 G 12 | 83°F | 87°F | 1007.8 hPa (-0.0) | ||
| APAM2 - 8575512 - Annapolis, MD | 35 mi | 67 min | 85°F | 1007.2 hPa | ||||
| CPVM2 | 37 mi | 67 min | 83°F | 72°F | ||||
| WASD2 - 8594900 - Washington, DC | 40 mi | 67 min | NW 5.1 G 8 | 83°F | 89°F | 1008 hPa |
Wind History for Cove Point LNG Pier, MD
(wind in knots) EDIT (on/off) Help| 6 PM | 7 PM | 8 PM | -12 PM | -12 PM | -12 PM | -12 PM | 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 | |
| Last 24hr | S | S G16 | S | W | NW G9 | W | SW | W | W G9 | -- | SW | SW | SW | SW G15 | SW | W G18 | SW | SW G18 | W G22 | SW G21 | ||||
| 1 day ago | S | S | SW | SW | W G8 | SW | W | W G11 | NW G11 | NW G16 | NW | W G8 | W | W G11 | W G12 | NW G11 | NW G13 | N | N | N | NW G12 | W G15 | W G11 | W |
| 2 days ago | S | S | S | S | S | S | SW | SW G17 | W G14 | W | W G10 | NW G8 | NW | NW | N | N | N | N | E | SE | S | S G14 | S G14 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| St Marys County Airport, MD | 12 mi | 54 min | WSW 10 | 10.00 mi | Fair | 90°F | 71°F | 55% | 1008.8 hPa |
| Patuxent River, Naval Air Station, MD | 13 mi | 45 min | SW 10 G 17 | 10.00 mi | Partly Cloudy | 90°F | 73°F | 59% | 1007.8 hPa |
| St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD | 23 mi | 44 min | SW 14 G 21 | 10.00 mi | Fair | 95°F | 73°F | 49% | 1007.6 hPa |
| Cambridge-Dorchester Airport, MD | 24 mi | 52 min | SSW 9 G 16 | 10.00 mi | Fair | 90°F | 73°F | 59% | 1007.8 hPa |
Wind History from NHK (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 | SE | S | SW | W | SW | W | W | W | SW | SW | SW | W | Calm | SW | SW | SW | SW | SW | SW | SW G18 | SW | W G19 | SW | SW G17 |
| 1 day ago | SW | SW | SW | SW | SW | SW | SW | W | W | W | SW | W | W | W | NW | W | NW | NW | NW | SW G15 | W | SW | W | |
| 2 days ago | SE | S | S | S | SW | SW | SW | SW | SW | SW | W | NW | Calm | NW | NW | NW | NW | N | SE | SE | SW | S | SW |
Tide / Current Tables for Long Beach, Chesapeake Bay, Maryland
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
EDIT (on/off) Help One Week of DataBroomes Island
Click for MapFlood direction 290° true
Ebb direction 110° true
Mon -- 01:31 AM EDT 0.00 knots Slack
Mon -- 04:27 AM EDT 0.33 knots Max Flood
Mon -- 05:59 AM EDT Sunrise
Mon -- 07:41 AM EDT -0.00 knots Slack
Mon -- 11:06 AM EDT -0.50 knots Max Ebb
Mon -- 11:11 AM EDT Moonset
Mon -- 02:31 PM EDT 0.00 knots Slack
Mon -- 05:24 PM EDT 0.36 knots Max Flood
Mon -- 08:25 PM EDT Sunset
Mon -- 09:00 PM EDT -0.00 knots Slack
Mon -- 11:43 PM EDT -0.30 knots Max Ebb
Mon -- 11:49 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for MapFlood direction 290° true
Ebb direction 110° true
Mon -- 01:31 AM EDT 0.00 knots Slack
Mon -- 04:27 AM EDT 0.33 knots Max Flood
Mon -- 05:59 AM EDT Sunrise
Mon -- 07:41 AM EDT -0.00 knots Slack
Mon -- 11:06 AM EDT -0.50 knots Max Ebb
Mon -- 11:11 AM EDT Moonset
Mon -- 02:31 PM EDT 0.00 knots Slack
Mon -- 05:24 PM EDT 0.36 knots Max Flood
Mon -- 08:25 PM EDT Sunset
Mon -- 09:00 PM EDT -0.00 knots Slack
Mon -- 11:43 PM EDT -0.30 knots Max Ebb
Mon -- 11:49 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 | -0.1 | 0.1 | 0.2 | 0.3 | 0.3 | 0.2 | 0.1 | -0.1 | -0.3 | -0.4 | -0.5 | -0.5 | -0.3 | -0.1 | 0.1 | 0.3 | 0.4 | 0.3 | 0.3 | 0.1 | -0 | -0.2 | -0.3 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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. |