Tuesday, January21, 2020
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Marine Weather and Tides
Piney Point, MD

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:19AMSunset 5:18PM Tuesday January 21, 2020 3:02 PM EST (20:02 UTC) Moonrise 4:31AMMoonset 2:26PM Illumination 12% Phase: Waning Crescent; Moon at 26 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ537 Tidal Potomac From Cobb Island To Smith Point- 1246 Pm Est Tue Jan 21 2020
.small craft advisory in effect through late tonight...
This afternoon..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Tonight..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Wed..N winds 5 to 10 kt. Waves 1 to 2 ft.
Wed night..NE winds 5 to 10 kt. Waves 1 ft.
Thu..N winds 5 kt. Waves less than 1 ft.
Thu night..NE winds 5 kt. Waves less than 1 ft.
Fri..E winds 10 to 15 kt. Waves 1 to 2 ft. Rain through the night.
Sat..SE winds 10 to 15 kt...becoming W 5 to 10 kt. Waves 2 to 3 ft. Rain likely through the day.
ANZ500 1246 Pm Est Tue Jan 21 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build eastward from the mississippi valley through Wednesday, then move offshore during the second half of the week. A low pressure system will approach on Saturday.


7 Day Forecast for Marine Location Near Piney Point, MD
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location: 38.13, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 211432 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 932 AM EST Tue Jan 21 2020

SYNOPSIS. High Pressure will continue to move eastward from the Mississippi Valley, resulting in dry weather through Wednesday. The high will shift offshore during the second half of the week. Low pressure will approach from the central United States on Saturday.

NEAR TERM /THROUGH TONIGHT/. Strong high pressure located over the mid Mississippi Valley will continue to move eastward through Wednesday, delivering dry weather to the region. Aloft, a positively tilted trough extends across the area to a developing closed low over the Tennessee Valley. There's enough moisture in the trough to result in some spotty flurries west of the Allegheny Front through noon, but with a low Froude number, not expecting much, if anything, to spill into our CWA. Current satellite supports this, as clouds are beginning to thin west of the Allegheny Front. Made minor adjustments to temperatures to reflect current obs. Otherwise, previous forecast remains on track.

PREVIOUS DISCUSSION .

The closed low will dip into the southeastern states through tonight while the surface high will build toward the Ohio Valley. Some mid and high clouds may skirt by this evening, but otherwise skies will be clear. With 925mb temperatures similar to what they were Monday, expect similar high temperatures ranging through the 30s. There will be a bit less wind, though. Dew points will remain in the low to mid teens through tonight, so would expect that to be the bottom threshold for low temperatures, with the most favorable radiational cooling conditions likely in the valleys west of the Blue Ridge. Urbanized areas will be closer to the mid 20s.

SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/. Heights will rise on Wednesday as a ridge axis builds in from the west, and the surface high will move overhead. Both of these features will progress eastward Thursday. Daytime highs will moderate as a result, with upper 30s-mid 40s Wednesday and 40s to near 50 Thursday. Wednesday night will likely still be chilly with a continuation of clear skies and light winds. Mid/high clouds will be increasing Thursday and Thursday night ahead of a trough in the nation's midsection. Combined with rising dew points, Thursday night lows will be a bit warmer in the mid 20s to lower 30s.

LONG TERM /FRIDAY THROUGH MONDAY/. High pressure will be moving to our north on Friday while a mid to upper level trough deepens over the central CONUS, resulting in a mid-level cut-off low. At the surface, low pressure system will develop over the Midwest followed by an ENE track and approaching our region. This will increase the chances of precipitation over our region Friday night as the low pressure moves across the Ohio Valley. This will then develop into a coastal low Saturday into Saturday night. Rain or snow are possible as this system moves across our area between Friday night and Saturday night, with the best chance of any wintry weather west of the Blue Ridge. The low will deepen offshore Saturday night into Sunday, with possible rain and/or snow showers lingering into Sunday. Upslope snow is possible into Monday and remaining dry into Tuesday.

AVIATION /14Z TUESDAY THROUGH SATURDAY/. VFR conditions will continue through Thursday night as high pressure moves across the area. Northwest to north winds will be around 10 kt or less through tonight, then light and variable through Thursday night.

VFR conditions expected Friday with high pressure in control. Sub- VFR conditions could begin Friday night with a low pressure impacting our region and remaining into Saturday night. This system could bring rain and/or snow showers over the terminals (any chance of snow is higher at MRB at this time). A few rain or snow showers could remain into Sunday as winds increase.

MARINE. There are some gusts of 20-25 kt early this morning on waters open to the NNW fetch . generally on waters south of the Bay bridge, though there are a few sporadic reports elsewhere. Should see these winds weaken by midday as the pressure pattern relaxes a bit. However, there may be enough wind in the column to combine with northerly channeling to keep some higher gusts on the wider waters south of Drum Point through tonight, so a Small Craft Advisory will remain in effect for these locations. By Wednesday morning, winds will become lighter as high pressure moves overhead, with such conditions continuing through Thursday night.

Sub-SCA conditions are expected on Friday with high pressure in control. SCA conditions possible Friday night into Sunday with low pressure moving across our area and intensifying offshore.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 1 PM EST this afternoon for ANZ532- 533-541. Small Craft Advisory until 1 AM EST Wednesday for ANZ534-537- 543.

SYNOPSIS . ADS/MSS NEAR TERM . ADS/MSS SHORT TERM . ADS LONG TERM . IMR AVIATION . ADS/IMR MARINE . ADS/IMR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPTM2 - 8578240 - Piney Point, MD 0 mi44 min N 13 G 17
LWTV2 - 8635750 - Lewisetta, VA 10 mi50 min N 11 G 15 33°F 37°F1030.8 hPa
44042 - Potomac, MD 12 mi26 min N 16 G 18 31°F 43°F1030.6 hPa
SLIM2 - 8577330 - Solomons Island, MD 14 mi44 min N 9.9 G 12 32°F 43°F1030.6 hPa
BISM2 - 8571421 - Bishops Head, MD 27 mi50 min NNW 11 G 14 32°F 35°F1030.8 hPa
NCDV2 30 mi50 min NNW 4.1 G 12 35°F 41°F1030.6 hPa
CA2 - 8571892 - Cambridge, MD 39 mi50 min NW 12 G 16 32°F 39°F1030.7 hPa
44058 - Stingray Point, VA 42 mi32 min NNE 16 G 18 43°F1033.4 hPa
BSLM2 - Chesapeake Bay, MD 46 mi152 min NNW 5.1 -23°F 1032 hPa
RPLV2 - 8632837 - Rappahannock Light, VA 49 mi44 min NNW 19 G 22 1030.8 hPa

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
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G29
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G33
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G25
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N15
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W5
G11
SW18
G24
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G21
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G22
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G17
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G19
N9
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NW9
NW19
N20
N18
G23
N18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD5 mi2.2 hrsN 710.00 miFair37°F16°F42%1031 hPa
St Marys County Airport, MD13 mi95 minNNW 6 miFair32°F12°F44%1031.5 hPa
Patuxent River, Naval Air Station, MD13 mi2.2 hrsN 1510.00 miA Few Clouds33°F17°F52%1031.4 hPa

Link to 5 minute data for KNUI

Wind History from NUI (wind in knots)
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Last 24hrN8N5Calm3N75N535NW3334Calm4----N7N7
G17
N9N8
G14
N766
1 day agoN9
G18
NW7NW10
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2 days agoS6SW7S9SW8SW12
G23
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SW16SW14
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SW12SW10NW4W6NW8NW10
G18
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G19
NW7NW12
G22

Tide / Current Tables for Piney Point, Potomac River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
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Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Tue -- 01:42 AM EST     -0.66 knots Max Ebb
Tue -- 04:32 AM EST     Moonrise
Tue -- 05:20 AM EST     0.00 knots Slack
Tue -- 07:19 AM EST     Sunrise
Tue -- 08:07 AM EST     0.73 knots Max Flood
Tue -- 11:11 AM EST     -0.00 knots Slack
Tue -- 02:25 PM EST     Moonset
Tue -- 03:14 PM EST     -1.02 knots Max Ebb
Tue -- 05:15 PM EST     Sunset
Tue -- 07:56 PM EST     0.00 knots Slack
Tue -- 09:04 PM EST     0.24 knots Max Flood
Tue -- 10:50 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.6-0.7-0.6-0.4-0.10.20.60.70.70.40.1-0.3-0.7-0.9-1-1-0.8-0.6-0.300.20.2-0

Weather Map
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wmap_A
GEOS 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 (15,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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 numerous 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.