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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 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 6:21AM | Sunset 7:56PM | Tuesday August 20, 2019 12:02 AM EDT (04:02 UTC) | Moonrise 9:44PM | Moonset 9:57AM | Illumination 79% |  |
ANZ530 Chesapeake Bay North Of Pooles Island- 1036 Pm Edt Mon Aug 19 2019
Rest of tonight..W winds 5 kt. Waves flat. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms. Patchy fog with vsby 1 to 3 nm.
Tue..E winds 5 kt. Waves flat. A chance of showers and tstms. Patchy fog. Vsby 1 to 3 nm.
Tue night..S winds around 5 kt. Waves flat. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu..W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Thu night..NW winds 5 kt. Waves less than 1 ft. A chance of showers.
Fri..N winds 5 kt. Waves less than 1 ft. A chance of showers in the morning. A chance of showers through the night.
Sat..NE winds 5 kt. Waves less than 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
Rest of tonight..W winds 5 kt. Waves flat. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms. Patchy fog with vsby 1 to 3 nm.
Tue..E winds 5 kt. Waves flat. A chance of showers and tstms. Patchy fog. Vsby 1 to 3 nm.
Tue night..S winds around 5 kt. Waves flat. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu..W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Thu night..NW winds 5 kt. Waves less than 1 ft. A chance of showers.
Fri..N winds 5 kt. Waves less than 1 ft. A chance of showers in the morning. A chance of showers through the night.
Sat..NE winds 5 kt. Waves less than 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1035 Pm Edt Mon Aug 19 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the atlantic will deliver a light southerly flow over the region through Tuesday. A cold front will approach the waters Wednesday into Thursday. Small craft advisories may be needed for portions of the waters Wednesday.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the atlantic will deliver a light southerly flow over the region through Tuesday. A cold front will approach the waters Wednesday into Thursday. Small craft advisories may be needed for portions of the waters Wednesday.
7 Day Forecast for Marine Location Near Joppae, MD
Hourly EDIT Helplocation: 39.39, -76.36 debug
Area Discussion for - Baltimore, MD/Washington
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 klwx 200129 afdlwx area forecast discussion national weather service baltimore md washington dc 929 pm edt Mon aug 19 2019 Synopsis Hot and humid conditions will persist through Thursday with daily chances of afternoon and evening thunderstorms. A cold front will cross the area Thursday night with canadian high pressure building in for the weekend, Near term through Tuesday Isolated showers and thunderstorms are still lingering around our area mainly developing due to outflow boundaries and terrain. Expecting thunderstorms activity to continue to diminish in the next few hours. Some fog could again develop over the valleys tonight where skies clear enough. Other than that, warm and muggy tonight with low temperatures in the upper 60s to mid 70s. Short term Tuesday night through Wednesday night Hot and humid conditions will persist through mid week until cdfnt clears the fcst area late Thu or Thu night. Expect more of the same with showers and thunderstorms each afternoon with wed being the more active day with a shortwave-trough passing by and more significant height falls. Fcst storm motions are not expected to be particularly very fast, so storms may produce heavy rainfall and isolated instances of flash flooding in addition to damaging winds and hail. Heat indices may approach the heat advisory criteria of 105f east of the blue ridge both tue and wed. Long term Thursday through Monday On Thursday, a cold front will approach the area from the ohio valley. This front will bring some much needed relief from the heat into the weekend. On Thursday however, with the front coming through in the afternoon, high temperatures probably still reach the upper 80s to low 90s. With dew points in the low 70s too, this will lead to heat indices into the mid to upper 90s, with a few spots approaching 100 in southern md central va. The cold front moving into this environment will certainly result in some thunderstorms across the region, as evident by likely pops Thursday afternoon. Thunderstorms that do form along the front will have 1000-2000 j kg of CAPE and around 30kts of deep layer shear to work with. This will mean a threat for severe weather, with damaging winds and large hail being the expected threats. A lot will depend on how quickly the front moves through the area. Obviously, if the front comes through earlier than anticipated, severe threat would be more limited. So, will have to monitor over the coming days for tends in the speed of the front. Models are not very sure at all where the front GOES after Thursday. The ECMWF hangs the front up near the forecast area on Friday, with norther parts of the area likely being behind the front, and areas farther south still being in warmer and more humid air. However, the gfs pushes the front out to sea very quickly Thursday night into Friday, resulting in a dry and cooler than average day area-wide. Eps ensembles show some support of both solutions honestly, with the mean hanging the front up in central va through Saturday. Temperatures across the area will heavily depend on where that front ends up on Friday, with some areas in likely barely in the low 80s, and others closer to the upper 80s farther south. Carrying chance pops through Friday at least, with best chances farther south. With a stalled front over the area, and a warm and humid airmass to the |
south, can't rule out an isolated flooding threat as well, especially if storms train along the frontal boundary. Rain chances decrease into Saturday, but could still see some in southern areas. Even the ECMWF clears the front from the area by Saturday afternoon, so expecting a dry afternoon at the very least. But could not rule out a showers or storms, especially down south, if the front is stubborn to leave. Temperatures on Saturday will be in the low 80s, and with dew points in the low 60s, it will feel much less humid. By Sunday, model guidance all agrees that the front will be long gone. Surface high pressure will be set up to our northeast. Dry conditions expected Sunday, with highs into the mid 80s or so. Again, low dew points will make it feel very comfortable out. Aviation 01z Tuesday through Saturday Isolated thunderstorms are moving in the vicinity of iad at this moment but expecting activity to diminish in the next hours to allow forVFR conditions. Some fog may develop later tonight over cho and mrb, maybe iad as well. Sct showers t-storms expected over all terminals Tuesday into Wednesday with boundary over our area. Thunderstorms are expected on Thursday afternoon, in association with a passing cold front. These storms may produce strong winds and some hail. Coverage seems to be pretty high, so all terminals face the risk of restrictions during storms. Other than that,VFR conditions are expected for the rest of the day. More showers and storms possible on Friday, as the cold front could hang up over the region, with the best chance of coverage near cho. Could see some lower CIGS down near the front, as well as showers and storms. Marine Sct shower t-storms expected today through fri. Winds and waves higher near t-storms. SCA conditions possible Wed through thu night. Generally expecting winds to remain below SCA criteria on Thursday and Friday. Though the central bay and lower tidal potomac may get close each afternoon. Additionally, there is a threat for showers and thunderstorms for all waters on Thursday, with potentially severe wind gusts. So special marine warnings may be needed. For Friday, the threat for showers and storms will really be more confined to the central bay and lower tidal potomac. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... None. Synopsis... Lfr near term... Imr lfr short term... Lfr long term... Cjl aviation... Imr lfr cjl marine... Lfr cjl |
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 |
| BLTM2 - 8574680 - Baltimore, MD | 14 mi | 69 min | Calm G 1.9 | 85°F | 84°F | 1016 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 14 mi | 63 min | SSE 1.9 G 4.1 | 82°F | 86°F | 1016.4 hPa (+1.0) | ||
| FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 15 mi | 63 min | WNW 4.1 G 5.1 | 84°F | 1016.4 hPa (+1.2) | |||
| FSNM2 | 15 mi | 69 min | W 4.1 G 5.1 | 1016.6 hPa | ||||
| CPVM2 | 27 mi | 63 min | 83°F | 82°F | ||||
| APAM2 - 8575512 - Annapolis, MD | 29 mi | 63 min | 82°F | 1015.8 hPa (+1.0) | ||||
| CHCM2 - 8573927 - Chesapeake City, MD | 31 mi | 63 min | E 2.9 G 4.1 | 80°F | 84°F | 1016.7 hPa (+1.2) | ||
| TPLM2 - Thomas Point, MD | 34 mi | 63 min | SSW 5.1 G 6 | 84°F | 82°F | 1017.4 hPa (+1.2) | 74°F | |
| DELD1 - 8551762 - Delaware City, DE | 43 mi | 69 min | N 1.9 G 2.9 | 81°F | 80°F | 1016.6 hPa | ||
| RDYD1 - 8551910 - Reedy Point, DE | 43 mi | 69 min | 81°F | 84°F | 1016.1 hPa | |||
| BSLM2 - Chesapeake Bay, MD | 46 mi | 153 min | Calm | 78°F | 1016 hPa | 76°F |
Wind History for Tolchester Beach, MD
(wind in knots) EDIT (on/off) Help| 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 | |
| Last 24hr | E | E | S | W | S | S G5 | SE | SE | SW G7 | SW | W | W | SW | SW | SW | S | SE | S | SW | S | S G6 | SE | S G6 | SE |
| 1 day ago | SE | SE | SE | SE | SE | S | SE | SE | SE | SW | SW | SW | SW | SW | SW | SW | SW G15 | SW G7 | SW | S G5 | SE | E | E | N G6 |
| 2 days ago | E | E | E | E | E | SE | SE | W | W G6 | W | W | SW | SW | SW | SW | S | E | SE | E |
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 |
| Baltimore / Martin, MD | 5 mi | 1.7 hrs | N 0 | 10.00 mi | Fair | 82°F | 77°F | 84% | 1016.9 hPa |
| Phillips Army Air Field / Aberdeen, MD | 11 mi | 4.2 hrs | N 0 | 10.00 mi | Mostly Cloudy | 86°F | 73°F | 66% | 1015.5 hPa |
| Baltimore, Inner Harbor, MD | 15 mi | 2.1 hrs | no data | mi | 86°F | 71°F | 61% | 1016 hPa | |
| Baltimore, Baltimore-Washington International Airport, MD | 21 mi | 2.1 hrs | SSW 5 | 10.00 mi | Mostly Cloudy | 84°F | 72°F | 67% | 1016.2 hPa |
Link to 5 minute data for KMTN
Wind History from MTN (wind in knots)
| -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 | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | |
| Last 24hr | NW | Calm | Calm | Calm | S | Calm | SW | NW | SW | S | SE | SE | S | SE | SE | SE | SE | S | Calm | Calm | ||||
| 1 day ago | Calm | Calm | Calm | Calm | Calm | S | Calm | SW | SE | E | SE | SE | SE | SE | SE | W | SE | SE | S | SE | SE | Calm | Calm | N |
| 2 days ago | E | E | Calm | Calm | Calm | Calm | Calm | E | E | SE | SE | SE | SE | E | SE | S | S | S | Calm | Calm | Calm | Calm | Calm |
Tide / Current Tables for Battery Point, Gunpowder River, Maryland
EDIT Weekend mode (on/off) (on/off) Help One Week of DataBattery Point
Click for Map
Tue -- 05:42 AM EDT 0.80 feet Low Tide
Tue -- 06:22 AM EDT Sunrise
Tue -- 10:57 AM EDT Moonset
Tue -- 11:23 AM EDT 1.72 feet High Tide
Tue -- 05:59 PM EDT 0.47 feet Low Tide
Tue -- 07:54 PM EDT Sunset
Tue -- 10:43 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 05:42 AM EDT 0.80 feet Low Tide
Tue -- 06:22 AM EDT Sunrise
Tue -- 10:57 AM EDT Moonset
Tue -- 11:23 AM EDT 1.72 feet High Tide
Tue -- 05:59 PM EDT 0.47 feet Low Tide
Tue -- 07:54 PM EDT Sunset
Tue -- 10:43 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 |
| 1.7 | 1.5 | 1.3 | 1.1 | 0.9 | 0.8 | 0.8 | 0.9 | 1.1 | 1.3 | 1.6 | 1.7 | 1.7 | 1.5 | 1.3 | 1 | 0.7 | 0.5 | 0.5 | 0.5 | 0.8 | 1.1 | 1.4 | 1.6 |
Tide / Current Tables for Pond Point, Susquehanna River, Maryland
EDIT (on/off) Help One Week of DataPond Point
Click for Map
Tue -- 12:02 AM EDT 1.99 feet High Tide
Tue -- 06:14 AM EDT 0.96 feet Low Tide
Tue -- 06:22 AM EDT Sunrise
Tue -- 10:56 AM EDT Moonset
Tue -- 11:56 AM EDT 2.03 feet High Tide
Tue -- 06:31 PM EDT 0.57 feet Low Tide
Tue -- 07:53 PM EDT Sunset
Tue -- 10:42 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:02 AM EDT 1.99 feet High Tide
Tue -- 06:14 AM EDT 0.96 feet Low Tide
Tue -- 06:22 AM EDT Sunrise
Tue -- 10:56 AM EDT Moonset
Tue -- 11:56 AM EDT 2.03 feet High Tide
Tue -- 06:31 PM EDT 0.57 feet Low Tide
Tue -- 07:53 PM EDT Sunset
Tue -- 10:42 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 |
| 2 | 1.9 | 1.7 | 1.5 | 1.2 | 1 | 1 | 1 | 1.2 | 1.4 | 1.7 | 1.9 | 2 | 1.9 | 1.7 | 1.3 | 1 | 0.7 | 0.6 | 0.6 | 0.8 | 1.1 | 1.4 | 1.8 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES Local Image of 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 (0,6,7,8)
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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. |