Wednesday, April8, 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 6:39AMSunset 7:39PM Wednesday April 8, 2020 1:54 PM EDT (17:54 UTC) Moonrise 7:30PMMoonset 6:17AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 137 Pm Edt Wed Apr 8 2020
.small craft advisory in effect until 8 pm edt this evening...
This afternoon..NW winds 10 kt with gusts to 20 kt. Waves 2 ft. Scattered showers with isolated tstms.
Tonight..NE winds 5 to 10 kt...becoming se late. Waves 1 to 2 ft.
Thu..S winds 10 to 15 kt...becoming W 15 to 20 kt with gusts to 30 kt in the afternoon. Waves 1 ft... Building to 3 ft in the afternoon. Showers likely.
Thu night..W winds 10 to 15 kt with gusts to 25 kt. Waves 3 ft.
Fri..W winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
Fri night..NW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
Sat..W winds 10 to 15 kt...becoming S 5 to 10 kt. Waves 1 to 2 ft.
Sun..S winds 15 to 20 kt. Waves 1 to 2 ft...building to 3 ft. Rain. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 137 Pm Edt Wed Apr 8 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak frontal boundary will pass through the waters later today followed by a stronger cold front on Thursday, resulting in yet another threat of showers and Thunderstorms. Small craft advisories will likely Thursday through Saturday. A gale warning may be needed for portions of the waters Thursday and Friday.


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 081422 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1022 AM EDT Wed Apr 8 2020

SYNOPSIS. A front will drop southward through our region this morning. A strong cold front moves through our area on Thursday. A Canadian high pressure builds over our area Friday through Saturday before low pressure possibly impacts the area early next week.

NEAR TERM /THROUGH TONIGHT/. Earlier convection has pushed south/dissipated, with some clearing in its wake. A weak boundary remains to our north and will settle southward through the day. Additional showers and storms will be possible by early afternoon, mainly across the southern half of the forecast area. As temperatures are expected to warm up into the mid 70s to low 80s, less than 1000 J/kg of CAPE will develop. Stronger updrafts will have the potential to tap into 40+ kt of shear and could pose an isolated severe weather threat with marginally severe hail or localized damaging winds. Weak forcing and instability will likely keep the threat marginal. The threat for showers and thunderstorms should continue to wane by early evening as the front moves further south of our region and we become positioned on the cold side of the front. Dry conditions are expected this evening. Remnant convection from the Ohio Valley may approach from the west late tonight.

SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/. A strong cold front will move through our region early Thursday morning and continue through our area into the afternoon. A strong upper level jet will shift northward and help to enhance lift along the frontal boundary as it moves through our forecast area. HiRes guidance is hinted at the formation of squall line feature that forms during the early morning periods Thursday and progresses eastward through our area by the early Thursday afternoon. This line has the potential to develop thunderstorms capable of producing strong to damaging winds but there remains uncertainty whether this line will hold together through our area.

Behind the frontal passage, a strong pressure gradient will lead to gusty winds of 25 to 35 knots with locally higher gusts possible. High pressure will build into our region through Friday but strong winds could linger into Friday. A cooler air mass will move into our region on Friday with temperatures running much cooler in the upper 40s and 50s with overnight lows in the 30s Friday night. As temps drop near freezing along with winds becoming light, there is potential that frost/freeze advisory may need to be issued for Friday night but there remains a lot of uncertainty at this time.

LONG TERM /SATURDAY THROUGH TUESDAY/. The aforementioned area of high pressure will push offshore on Sunday, with southerly flow returning, bringing warmer and more moist air into the region. Initial thoughts are that the first half of the day stays dry. However, a potent cutoff upper low, previously sitting over the desert southwest, will be moving out over the southeast. Surface low pressure will form over the Arklatex and move off generally towards our region. Guidance is spread about how exactly this will evolve. Maintaining thoughts from yesterday that this has the potential to be an impactful event for the region in one of two ways. The first option is that the system tracks to our south, but we are solidly within the heavy rain threat, so flooding concerns could arise. The other possibility is for the system to track into the Ohio Valley, and bring a cold front through late Sunday or Monday (timing is still very much in flux), which would result in the potential for some severe weather. This is out near the end of the forecast period, so not locking onto any particular solution at this time, but at this point, these are the two scenarios that the guidance is coming up with.

AVIATION /14Z WEDNESDAY THROUGH SUNDAY/. Gusty west winds today to around 20 kt and mainly VFR conditions. A weak boundary could spark and isolated/widely scattered shower or storm this afternoon, but the highest chance is mainly south/east of the TAF sites.

A strong cold front will move through our terminals from the west early Thursday morning through the afternoon periods. MRB and CHO terminals will be the first to experience any precipitation with this system and there is the potential for thunderstorm capable of producing strong gusty winds forming along the cold front. Behind the frontal passage, VFR conditions along with strong and gusty winds of 25 to 35 knots out of the west-northwest will move into behind the front. These conditions are expected to continue into early Friday. Winds should start to taper off Friday afternoon with VFR conditions expected to continue.

Winds will gradually diminish Friday night, with VFR conditions expected to continue through the day on Saturday. SubVFR conditions may return Sunday as rain potential moves back into our region.

MARINE. West winds will increase through the midday hours. A Small Craft Advisory is in effect for this afternoon. An isolated thunderstorm could require a Special Marine Warning this afternoon, mainly near southern Maryland. A strong cold front will move through the waters on Thursday. Strong and gusty winds are expected along and behind the front. Gusts of 25 to 35 knots are expected. Small Craft Advisories are likely Thursday and Friday with Gale Warnings possible Thursday afternoon into Friday.

SCA conditions will be possible both Saturday and Sunday.

TIDES/COASTAL FLOODING. DC Southwest Waterfront briefly reached minor stage this morning. The next high tide is lower and should be below flood, but sensitive site may be close with the high tide occurring tonight/Thursday morning.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 8 PM EDT this evening for ANZ530>543.

SYNOPSIS . JMG NEAR TERM . ADS/JMG SHORT TERM . JMG LONG TERM . BKF AVIATION . ADS/BKF/JMG MARINE . ADS/BKF/JMG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPTM2 - 8578240 - Piney Point, MD 0 mi55 min NNW 8 G 8.9
LWTV2 - 8635750 - Lewisetta, VA 10 mi55 min NW 12 G 17 69°F 59°F1002.1 hPa (-1.0)
44042 - Potomac, MD 12 mi37 min W 7.8 G 9.7 59°F 56°F1002.3 hPa
SLIM2 - 8577330 - Solomons Island, MD 14 mi55 min NW 8 G 11 70°F 55°F1001.4 hPa (-1.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 20 mi115 min W 12 G 17 1002.1 hPa (+0.0)
BISM2 - 8571421 - Bishops Head, MD 27 mi55 min W 2.9 G 4.1 61°F 61°F1002 hPa (-0.5)
44062 - Gooses Reef, MD 30 mi31 min WNW 3.9 G 5.8 63°F 1003.1 hPa
NCDV2 30 mi61 min NW 5.1 G 12 73°F 60°F1001.6 hPa
CA2 - 8571892 - Cambridge, MD 39 mi55 min WNW 8.9 G 11 65°F 58°F1001.8 hPa (-0.5)
44058 - Stingray Point, VA 42 mi31 min NW 12 G 12 57°F1005.8 hPa
BSLM2 - Chesapeake Bay, MD 46 mi145 min WNW 6 1002 hPa
RPLV2 - 8632837 - Rappahannock Light, VA 49 mi55 min W 8 G 8.9 1003.6 hPa (+0.0)

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD5 mi62 minW 810.00 miFair73°F55°F55%1001.7 hPa
St Marys County Airport, MD13 mi69 minW 10 G 1610.00 miFair72°F51°F50%1002.4 hPa
Patuxent River, Naval Air Station, MD13 mi63 minWNW 1110.00 miPartly Cloudy75°F57°F54%1001.6 hPa

Link to 5 minute data for KNUI

Wind History from NUI (wind in knots)
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Last 24hrSW6CalmE95
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NE5CalmCalmSE3S5CalmCalmS3CalmS3SW3W4NW6
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1 day agoNE7NE104E5NE3NE3NE3CalmE4CalmCalmCalmCalmCalmCalmS3CalmCalmCalmS63SE7S7SW6
2 days agoSE63SE8SE9SE8SE9SE9SE6SE5S4S3S3CalmCalmCalmCalmCalmCalmCalm5NE9
G17
--N76

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

Wed -- 02:27 AM EDT     -0.00 knots Slack
Wed -- 06:23 AM EDT     -1.08 knots Max Ebb
Wed -- 06:39 AM EDT     Sunrise
Wed -- 07:16 AM EDT     Moonset
Wed -- 10:36 AM EDT     0.00 knots Slack
Wed -- 12:19 PM EDT     0.48 knots Max Flood
Wed -- 02:37 PM EDT     -0.00 knots Slack
Wed -- 06:24 PM EDT     -0.89 knots Max Ebb
Wed -- 07:36 PM EDT     Sunset
Wed -- 08:30 PM EDT     Moonrise
Wed -- 10:10 PM EDT     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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0.70.50.2-0.2-0.6-0.9-1.1-1.1-0.9-0.6-0.20.20.50.40.2-0.1-0.5-0.7-0.9-0.9-0.7-0.4-0.10.4

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 (13,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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