Monday, March1, 2021
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Marine Weather and Tides
Colwyn, PA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:31AMSunset 5:54PM Monday March 1, 2021 9:19 PM EST (02:19 UTC) Moonrise 8:47PMMoonset 8:08AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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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ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 704 Pm Est Mon Mar 1 2021
.gale warning in effect until 7 am est Tuesday...
Tonight..NW winds 20 to 25 kt with gusts up to 40 kt. Waves around 3 ft.
Tue..NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 25 kt. Waves around 3 ft in the morning, then 2 ft or less.
Tue night..SW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 2 ft or less.
Wed..W winds around 10 kt, diminishing to around 5 kt late. Waves 2 ft or less.
Wed night..NW winds 5 to 10 kt. Waves 2 ft or less.
Thu..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less.
Thu night..NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 ft or less.
Fri..NW winds 15 to 20 kt. Waves 2 ft or less.
Fri night..NW winds 10 to 15 kt. Waves 2 ft or less.
Sat..W winds 5 to 10 kt. Waves 2 ft or less.
Sat night..NW winds 5 to 10 kt. Waves 2 ft or less.
ANZ400 704 Pm Est Mon Mar 1 2021
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. An arctic cold front moves through the region tonight, then canadian high pressure builds in from the west for Tuesday. The high passes off the mid-atlantic coast Tuesday night, then another cold front passes through the region on Wednesday. High pressure builds in from the north for the end of the week and weekend.


7 Day Forecast for Marine Location Near Colwyn , PA
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location: 39.9, -75.21     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 012312 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 612 PM EST Mon Mar 1 2021

SYNOPSIS. An Arctic cold front moves through the region tonight, then Canadian high pressure builds in from the west for Tuesday. The high passes off the Mid-Atlantic coast Tuesday night, then another cold front passes through the region on Wednesday. High pressure builds in from the north for the end of the week and weekend.

NEAR TERM /THROUGH TUESDAY/. Skies have mostly cleared this evening as the first of two cold fronts has fully pushed offshore, south and east of our region. A few virga snow showers have attempted to push into the Poconos and Lehigh Valley regions, but webcams and surface obs haven't picked up on any snow as of yet. These should wane a bit as we move further on in the evening, staying on the opposite side of the Appalachians. Otherwise, temperatures will continue to fall as colder air advects into the area.

The main headline for tonight continues to be the passage of a secondary cold front that will bring strong winds and a piece of arctic air to our area. The second front moves into our area this evening and moves offshore tonight. This front should remain dry as it moves through the area but as the winds start to ramp up we could start to see some snow showers make their way into our northwestern zones. A robust mid level low centered to the northeast of our area will pull off to the east overnight keeping the bulk of the energy to our north and east. The upper jet cross the region and pushes offshore towards daybreak. The limiting factor appears to be the surface based instability as we won't have much of that available due to the shear amount of cloud cover that stuck around longer than initially anticipated today. Therefore, as has been noted on previous shifts, snow squalls seem unlikely but the possibility of snow showers remains.

Winds pick up this evening and then continue to increase behind the second front. While timing isn't great for ample mixing, there will be enough of a push for the winds to gust between 40 to 50 mph with a few higher gusts possible along the highest elevations and along the ridges towards morning. The gradient really slackens off as we head into Tuesday morning and we should see winds drop off appreciably through the day. With saturated ground, it may not take 40 to 45 mph winds to bring down trees but confidence isn't high enough to make any further expansions to the advisory as the best dynamics remain just to our north.

A pocket of arctic air sneaks down behind the front, crossing through the northeast and northern Mid-Atlantic overnight. Temperatures will plummet into the upper teens to 20s, with pockets of single digits possible in the higher terrain. While the strong winds will prevent the temperatures from really dropping off as much as they would on a light wind. clear sky night, they will certainly make it feel much colder and more like the single digits to mid teens through much of the area. Wind chills will get down to around 0 to -10 across the southern Poconos and northwestern New Jersey.

High pressure builds in from the west on Tuesday before sliding to south and offshore Tuesday evening. Tuesday should be mostly dry as the high builds in but with strong cold air advection in place we may need to keep an eye on the potential for any lake effect streamers to reach the forecast area. Best chances look to be northern and western areas and during the morning hours before the gradient really drops off. Temperatures on Tuesday will be cold though we should see plenty of sunshine. Daytime highs will remain in the 30s through much of the area with 20s across the higher terrain, which is around 15 degrees colder than they were today.

SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/. High pressure will be centered off the Mid-Atlantic coast Tuesday evening, then will drift out to sea Tuesday night. Meanwhile, weak low pressure will pass from the Great Lakes into northern New York state, and a stronger area of low pressure develops over the eastern Gulf of Mexico. That southern stream low will track east and move off the Southeast U.S. coast during the day Wednesday. With weak high pressure building across the Ohio Valley and Mid-Atlantic, the local area will remain clear and dry.

With a good deal of sunshine and H8 temps from +1C to +3C, Wednesday should be the warmest day of the week with highs in the 40s across the northern zones and along the coasts, and in the 50s across interior southern New Jersey, Delmarva, and the Delaware Valley.

Another cold front passes through Wednesday night, and Canadian high pressure builds in from the west. Strong CAA will be underway. Lows generally in the upper 20s to low 30s.

LONG TERM /THURSDAY THROUGH MONDAY/. A prolonged period of quiet, but cold, weather is on tap for the first week of March.

Canadian high pressure digs into the Northern Plains and upper Great Lakes starting on Thursday, and with a deep upper trough over the Northeast, strong CAA will begin. Highs on Thursday will generally be in the low to mid 40s, which is a few degrees below normal. As the high builds closer, even colder air will surge to the south and east, and highs will be in the 30s to near 40 for Friday and Saturday, which is around 10 degrees below normal. Lows at night will generally be in the teens and 20s. However, high pressure will keep the region sunny and dry.

High pressure moves out to sea Saturday night, but the center of another high builds in from the north and west for the end of the weekend and start of the new week. Although temps should begin to moderate, temperatures remain below normal.

AVIATION /23Z MONDAY THROUGH SATURDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Tonight . VFR. Windy. Northwest winds around 15 to 25 knots with gusts to 40 kt. Gusts may begin to subside towards daybreak. High confidence.

Tuesday . VFR. Northwest winds 10 to 15 kt with gusts around 25 to 30 knots, diminishing through the day. High confidence.

Outlook .

Tuesday night . VFR. SW winds less than 10 kt. High confidence.

Wednesday . VFR. W winds 10-15 kt during the day. High confidence.

Wednesday night . VFR. NW winds less than 10 kt. High confidence.

Thursday through Friday . VFR. NW winds 10-20 kt with occasional gusts up to 25 kt during the day and around 10 kt at night. Moderate confidence.

Saturday . VFR. W winds 10-15 kt. Moderate confidence.

MARINE. Tonight through Tuesday . Gale Warnings are in effect for all waters for Monday night into Tuesday. Northwest winds around 20 to 30 knots with gusts around 35 to 45 knots. A few gusts near storm force are possible overnight. Light freezing spray is possible late tonight mainly over the Atlantic coastal waters of northern and central New Jersey.

Gales will end in the upper Delaware Bay in the early morning on Tuesday and around mid day/early afternoon on the lower Delaware Bay and ocean waters. Winds diminish through the day on Tuesday, falling to 15 to 20 knots by the afternoon. Seas building to 4 to 7 ft tonight then dropping down to 3 to 4 feet by later Tuesday. Light freezing spray possible in the morning mainly over the Atlantic coastal waters of northern and central New Jersey. A Small Craft Advisory may be needed for a brief period of time once the Gales are taken down though we should start to lose the SCA gusts by late afternoon, especially over the southern waters.

Outlook .

Tuesday night . SCA conditions possible, mainly on the ocean for 25 kt wind gusts.

Wednesday through Wednesday night . Sub-SCA conditions expected.

Thursday through Friday . SCA conditions for 25-30 kt wind gusts on the ocean and Delaware Bay.

Saturday . Sub-SCA conditions possible.

HYDROLOGY. Gradual rises continue this afternoon on many of our rivers in the Raritan and Passaic basins in New Jersey. While the Millstone River at Griggstown remains in minor flood stage, the overall trend has been for the rises to not be as significant as forecast as snowmelt was less than expected. Rain has ended and while there will continue to be gradual river rises tonight into Tuesday the latest forecast for Pine Brook on the Passaic River now brings the point into action stage but below minor flood stage as it crests tonight into Tuesday. All other forecast points in the two river basins are anticipated to remain below flood stage though water levels will be high.

PHI WATCHES/WARNINGS/ADVISORIES. PA . Wind Advisory until 6 AM EST Tuesday for PAZ060>062-070-071- 101>106. Wind Advisory until 10 AM EST Tuesday for PAZ054-055. NJ . Wind Advisory until 6 AM EST Tuesday for NJZ001-007>010- 012>027. DE . Wind Advisory until 6 AM EST Tuesday for DEZ001-004. MD . None. MARINE . Gale Warning until 1 PM EST Tuesday for ANZ431-450>455. Gale Warning until 7 AM EST Tuesday for ANZ430.

Synopsis . MPS Near Term . Davis/Meola Short Term . MPS Long Term . MPS Aviation . Davis/Meola/MPS Marine . Davis/Meola/MPS Hydrology . WFO PHI


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PHBP1 - 8545240 - Philadelphia, PA 4 mi49 min 42°F 39°F1012.7 hPa
BDSP1 9 mi49 min 41°F 42°F1012.9 hPa
MRCP1 - 8540433 - Marcus Hook, PA 13 mi49 min 42°F 40°F1013.3 hPa
BDRN4 - 8539094 - Burlington, Delaware River, NJ 22 mi43 min WNW 14 G 21 41°F 40°F1011.9 hPa
NBLP1 - 8548989 - Newbold, PA 29 mi49 min NW 12 G 17 41°F 40°F1012.3 hPa
DELD1 - 8551762 - Delaware City, DE 30 mi49 min NW 14 G 26 42°F 1013.8 hPa
RDYD1 - 8551910 - Reedy Point, DE 30 mi49 min 42°F 39°F1013.4 hPa
CHCM2 - 8573927 - Chesapeake City, MD 41 mi49 min NW 13 G 18 43°F 39°F1014.3 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 42 mi49 min W 25 G 27 43°F 38°F1013.9 hPa
JCRN4 - Jacques Cousteau Reserve, NJ 47 mi49 min SSE 7 44°F 1012 hPa22°F

Wind History for Philadelphia, PA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Philadelphia, Philadelphia International Airport, PA2 mi25 minWNW 20 G 3210.00 miPartly Cloudy and Breezy41°F16°F36%1013.3 hPa
Philadelphia, Northeast Philadelphia Airport, PA17 mi25 minWNW 17 G 2710.00 miFair40°F19°F43%1013.1 hPa
Philadelphia - Wings Field Airport, PA17 mi24 minW 7 G 1710.00 miPartly Cloudy37°F19°F47%1012.9 hPa
Mount Holly, South Jersey Regional Airport, NJ20 mi25 minWNW 14 G 2610.00 miFair41°F17°F38%1012.6 hPa

Link to 5 minute data for KPHL

Wind History from PHL (wind in knots)
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Last 24hrNE4N5CalmCalmCalmNW3NW5NW4CalmSW4SW3SW7SW10W8NW7W12W12W17
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1 day agoSW3SW4S6W6SW4SW4SW3NE3E3NE4E6E6E5NE6NE5E5E7E10NE8NE6NE6--NE5NE6
2 days agoSE6S7SE3E3E6E7NE7E6NE9NE6NE6N6N7N3W5SW12W12W13W15W12W9W10SW5SW6

Tide / Current Tables for Penrose Avenue Bridge, Schuylkill River, Pennsylvania
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Penrose Avenue Bridge
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Mon -- 02:33 AM EST     6.12 feet High Tide
Mon -- 06:33 AM EST     Sunrise
Mon -- 08:08 AM EST     Moonset
Mon -- 09:53 AM EST     -0.09 feet Low Tide
Mon -- 02:52 PM EST     6.39 feet High Tide
Mon -- 05:53 PM EST     Sunset
Mon -- 08:47 PM EST     Moonrise
Mon -- 10:19 PM EST     -0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.75.2665.34.23.22.31.30.3-0.10.93.156.16.45.94.83.72.71.70.800.3

Tide / Current Tables for Philadelphia, Pennsylvania Current
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Philadelphia
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Mon -- 12:33 AM EST     2.03 knots Max Flood
Mon -- 03:44 AM EST     -0.00 knots Slack
Mon -- 06:33 AM EST     Sunrise
Mon -- 07:16 AM EST     -2.16 knots Max Ebb
Mon -- 08:08 AM EST     Moonset
Mon -- 10:47 AM EST     0.00 knots Slack
Mon -- 12:48 PM EST     2.15 knots Max Flood
Mon -- 04:03 PM EST     -0.00 knots Slack
Mon -- 05:52 PM EST     Sunset
Mon -- 07:42 PM EST     -2.20 knots Max Ebb
Mon -- 08:47 PM EST     Moonrise
Mon -- 11:14 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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1.921.70.9-0.3-1.4-1.9-2.2-2.1-1.8-1.20.41.82.11.81.20.1-1.2-1.8-2.1-2.2-2-1.6-0.4

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