Thursday, May13, 2021
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Marine Weather and Tides
Elverson, 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 5:48AMSunset 8:12PM Thursday May 13, 2021 8:51 AM EDT (12:51 UTC) Moonrise 5:56AMMoonset 9:10PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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ANZ530 Chesapeake Bay North Of Pooles Island- 736 Am Edt Thu May 13 2021
Today..N winds 10 kt. Waves 1 ft.
Tonight..NW winds 5 kt. Waves less than 1 ft.
Fri..N winds around 5 kt. Waves flat.
Fri night..W winds 5 kt. Waves flat.
Sat..W winds around 5 kt. Waves flat.
Sat night..SW winds around 5 kt. Waves flat.
Sun..S winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms through the night.
Mon..S winds around 5 kt. Waves 1 ft or less. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 736 Am Edt Thu May 13 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the midwest will drift eastward and reach the east coast by Saturday. A warm front will lift toward the area early next week.


7 Day Forecast for Marine Location Near Elverson , PA
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location: 40.09, -75.8     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 130714 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 314 AM EDT Thu May 13 2021

SYNOPSIS. Strong surface high pressure will gradually build in from the west through the weekend, then move offshore. Low pressure and its associated frontal boundary may approach the region on Monday, followed by another area of high pressure Tuesday into Wednesday.

NEAR TERM /THROUGH TONIGHT/. Expansive High Pressure centered over the Great Lakes will be the primary influence on our weather today with a dry and seasonable NNW flow prevailing on its eastern flank. At the mid-lvls an increasingly tilted ridge will be positioned NW of the area, with a weak shortwave traversing southeastward along its eastern periphery. Given this setup expect a dry day, with temperatures a bit warmer than yesterday with most locations reaching the upper 60s to lower 70s. It should be mostly sunny this morning, before some high-based diurnal cu likely develops this afternoon (perhaps aided by the aforementioned weak wave). Given the land/sea thermal contrast, a solid sea breeze should develop this afternoon . before washing out somewhere in the I-95 vicinity early this evening.

Any afternoon cumulus build-ups will dissipate tonight and winds will also drop off. Although radiational cooling should be relatively efficient, we should be slightly warmer/more moist than Wednesday night so overnight lows will likely run a few degrees warmer (i.e. largely in the mid 40s).

SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/. The Great Lakes High will remain our dominant weather feature through Friday, although it will show signs of weakening with a secondary High also beginning to take shape off the coast. The mid- lvl ridge axis should also move overhead Friday night with a weak closed low also passing to our south. The most notable change from Thursday's weather will be the warmer temperatures, as 850 temps warm about 3 degrees C. Consequently expect we will see highs reach the mid 70s, which will likely feel fairly warm after this recent cooler stretch. Given that the synoptic-setup will favor large-scale descent will continue the trend of trimming back PoPs in the NW as suspect that all that will come of any afternoon instability will be some cumulus development. Friday night will be dry with overnight mins a few degrees warmer (upper 40s/lower 50s) than tonight.

LONG TERM /SATURDAY THROUGH WEDNESDAY/. Surface high pressure centered over the mid-Atlantic region on Saturday is expected to drift slowly east through the weekend. A couple of shortwaves moving from northwest to southeast with the prevailing mid-level flow pattern will provide the chance of a few showers across much of the area Saturday afternoon and evening, then again Sunday afternoon and evening. Right now precipitation amounts look rather meager (one-half inch or less), so neither day will be a total washout. High and low temperatures are expected to be around normal for this time of year (highs in the low to mid 70s and lows in the mid 50s).

As the surface high loses its grip on our weather, a frontal boundary may push in from the west-southwest later Monday into Tuesday, with an associated chance of showers and thunderstorms, mainly south of I-95. Mid-level support, in addition to an onshore fetch at the surface, could bring a more substantial rain event to our Delmarva counties, but we'll have to wait and see how this system evolves over time. Above normal temperatures are possible during the mid-week period depending on how far north the frontal boundary pushes north.

AVIATION /07Z THURSDAY THROUGH MONDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today . VFR with scattered cumulus developing after 15Z. Winds north or northwest 5-10 kts. A sea breeze may shift winds southeast at ACY/MIV after 18Z. High confidence.

Tonight . VFR. N to NW winds less than 10 kt.

Outlook .

Friday . VFR. N winds,less than 10 kt, with sea breezes developing in the afternoon and shifting winds to the SE. Isolated afternoon SHRA possible. Moderate confidence.

Saturday through Sunday . Overall, VFR. Isolated SHRA/TSRA possible each afternoon and evening. N winds less than 10 kt, with afternoon sea breezes on Saturday, then SW winds less than 10 kt with afternoon sea breezes on Sunday. Moderate confidence.

Monday . Sub-VFR conditions possible in afternoon SHRA. S winds 10- 15 kt. Low confidence.

MARINE.

Today and Tonight .

Sub advisory conditions expected. Northwest winds 10 to 15 kts this morning shifting to southerly 5-10 kts by Thursday afternoon. Seas 1-3 feet.

Outlook .

Friday through Sunday . A prolonged period of sub-SCA conditions with afternoon sea breezes turning nearshore winds to the SE. Afternoon gusts of 15kt possible.

Monday and Tuesday . VSBY restrictions in SHRA possible Monday afternoon into early Tuesday. Otherwise, sub-SCA conditions with SE winds 10-15 kt with gusts up to 20 kt.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.

Synopsis . Miketta Near Term . Carr Short Term . Carr Long Term . Miketta Aviation . Carr/Miketta Marine . Carr/Miketta


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MRCP1 - 8540433 - Marcus Hook, PA 28 mi57 min 57°F 62°F1023.9 hPa
DELD1 - 8551762 - Delaware City, DE 37 mi57 min NNW 5.1 G 8 55°F 1024.7 hPa
PHBP1 - 8545240 - Philadelphia, PA 37 mi57 min 60°F 59°F1024 hPa
BDSP1 39 mi57 min 56°F 58°F1024.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 39 mi57 min WNW 4.1 G 6 53°F 62°F1025 hPa
RDYD1 - 8551910 - Reedy Point, DE 39 mi57 min 55°F 61°F1024.2 hPa
BDRN4 - 8539094 - Burlington, Delaware River, NJ 49 mi75 min W 1 G 1.9 52°F 56°F1023.9 hPa

Wind History for Delaware City, DE
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chester County Airport, PA8 mi56 minNW 610.00 miFair52°F32°F47%1025.4 hPa
Pottstown, Pottstown Limerick Airport, PA16 mi57 minWNW 410.00 miFair49°F33°F55%1025.1 hPa
Reading, Reading Regional Airport, PA22 mi57 minNW 310.00 miFair51°F38°F61%1025.2 hPa

Link to 5 minute data for KMQS

Wind History from MQS (wind in knots)
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NW7CalmW4NW8NW7NW6CalmW3W5N5W3W5NW3NW6

Tide / Current Tables for Millside, RR. bridge, Delaware
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Millside
Click for Map
Thu -- 02:07 AM EDT     5.95 feet High Tide
Thu -- 05:49 AM EDT     Sunrise
Thu -- 06:55 AM EDT     Moonrise
Thu -- 09:17 AM EDT     0.41 feet Low Tide
Thu -- 02:39 PM EDT     5.11 feet High Tide
Thu -- 08:08 PM EDT     Sunset
Thu -- 09:07 PM EDT     0.77 feet Low Tide
Thu -- 10:08 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.65.55.95.74.83.72.61.70.90.40.71.83.24.355.14.53.52.41.610.81.12.3

Tide / Current Tables for Edgemoor, Delaware
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Edgemoor
Click for Map
Thu -- 01:51 AM EDT     6.20 feet High Tide
Thu -- 05:48 AM EDT     Sunrise
Thu -- 06:55 AM EDT     Moonrise
Thu -- 09:09 AM EDT     0.43 feet Low Tide
Thu -- 02:23 PM EDT     5.33 feet High Tide
Thu -- 08:08 PM EDT     Sunset
Thu -- 08:59 PM EDT     0.80 feet Low Tide
Thu -- 10:08 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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55.96.25.74.83.62.51.60.90.40.82.13.64.65.35.24.53.42.31.510.81.32.7

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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