Thursday, October21, 2021
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Marine Weather and Tides
Felton, PA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 7:22AMSunset 6:20PM Thursday October 21, 2021 4:43 PM EDT (20:43 UTC) Moonrise 6:02PMMoonset 7:13AM 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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ANZ530 Chesapeake Bay North Of Pooles Island- 436 Pm Edt Thu Oct 21 2021
Rest of this afternoon..S winds 10 kt. Waves 1 ft.
Tonight..S winds 10 to 15 kt...becoming W after midnight. Gusts up to 20 kt. Waves 2 ft.
Fri..W winds 5 to 10 kt. Waves 1 ft.
Fri night..NW winds 5 kt. Waves less than 1 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft or less.
Sat night..NW winds 5 to 10 kt. Waves 1 ft.
Sun..S winds 5 kt. Waves less than 1 ft.
Mon..E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
ANZ500 436 Pm Edt Thu Oct 21 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will reside offshore through this evening as a cold front approaches from the west. The front is expected to cross the waters by early Friday morning. Then, a second front is slated to cross the waters Friday night. High pressure is slated to build over the area through the weekend.


7 Day Forecast for Marine Location Near Felton , PA
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location: 39.88, -76.53     debug


Area Discussion for - State College, PA
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FXUS61 KCTP 211908 AFDCTP

Area Forecast Discussion National Weather Service State College PA 308 PM EDT Thu Oct 21 2021

SYNOPSIS. Low pressure will track north of Pennsylvania through tonight, dragging a cold front through the area. This will result in showers and a few thunderstorms late this afternoon and evening, followed by cooler conditions this weekend. An upper level trough will swing over Pennsylvania Saturday, then begin lifting out by late in the weekend.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. Lots of sunshine throughout most of central PA early this afternoon ahead of a slowly advancing cold front over eastern OH. Clouds thickening over northwest PA early this afternoon as the front makes inroads towards PA. Potent shortwave diving through Indiana will drive the front through central PA by this evening causing shower and thunderstorm chances to significantly ramp up over western areas after 20z.

Strong large scale forcing, as inferred by model 500-300mb qvec convergence fields, and a plume of deep moisture preceding the front argue for going higher than NBM POPs. Best chance of showers and possible tsra will come with passage of low level jet and plume of highest pwats, occurring late in the day across the northwest mountains and not until around 03Z Friday over the southeast counties. Strong to potentially damaging wind gusts may be a possibility evening over the western counties, given deep layer shear of near 50 knots, with SPC MRGL outlook not changing much from yesterday's forecast.

The cold front and associated showers should exit the eastern counties around midnight. Post-FROPA NW flow regime sets in late tonight with plenty of lake clouds and scattered showers over the Allegheny Plateau.

SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/. No changes seen for Friday in high confidence post-FROPA NW flow regime, with plenty of lake clouds and scattered showers expected over the Allegheny Plateau heading into the first half of Friday.

An upper level trough will pivot across the area Friday into Saturday, accompanied by cooler temperatures and scattered showers across the northern and western mountains.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/. An upper level trough will pivot across the area Friday into Saturday, accompanied by cooler temperatures and scattered showers across the northern and western mountains.

By early next week, the focus will shift to a slow-moving area of low pressure lifting out of the midwest. Significant differences exist among med range guidance as to the track and timing of this feature. However, the latest ECENS and GEFS support a chance of rain sometime between late Sunday and late Tuesday, with the bulk of guidance tracking the low south of Pa. This track, combined with a surface high to the north, should result in chilly daytime conditions early next week. Have undercut NBM high temps based on its warm bias in cold air damming scenarios.

Drier and seasonable conditions appear likely by the middle of next week, as ridging builds in at the surface and aloft.

AVIATION /19Z THURSDAY THROUGH TUESDAY/. VFR conditions with a fresh southwesterly breeze will prevail into early evening for central and eastern airfields. Showers and a few tstorms will approach western TAF sites during this same time period.

Outlook .

Fri-Sat . Lingering MVFR cigs possible, mainly N/W.

Sun . AM valley fog, then --RA poss mainly S.

Mon-Tue . Widespread sub VFR cigs in rain showers.

CTP WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Guseman/DeVoir/RXR NEAR TERM . DeVoir/Fitzgerald/RXR SHORT TERM . DeVoir/Fitzgerald/RXR LONG TERM . Fitzgerald/Gartner AVIATION . Martin/Gartner


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 42 mi56 min S 5.1G8 72°F 71°F1012.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 45 mi56 min NNW 1G1.9 74°F 66°F1012.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 46 mi68 min SE 9.9G12 69°F 1012.7 hPa
FSNM2 46 mi56 min SSE 7G8.9 71°F 1012.6 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 49 mi62 min SSW 8G11 71°F 66°F1013.2 hPa

Wind History for Baltimore, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA21 mi51 minSSW 1010.00 miFair77°F46°F33%1011.6 hPa

Link to 5 minute data for KTHV

Wind History from THV (wind in knots)
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Last 24hr0000000NE3SE5SE33SE4E5SE30SE30SE30E3SE4SE5SE4SE6
1 day ago0000SW3S5SW30SE3003300000000000
2 days agoE4SE4E4E6E5E3E4SE5E5SE5E3SE3E3SE50SE3SE30SE3SE3000SE3

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Thu -- 07:20 AM EDT     0.94 feet Low Tide
Thu -- 07:21 AM EDT     Sunrise
Thu -- 08:10 AM EDT     Moonset
Thu -- 11:42 AM EDT     2.57 feet High Tide
Thu -- 06:16 PM EDT     Sunset
Thu -- 06:47 PM EDT     0.50 feet Low Tide
Thu -- 07:00 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland (2)
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Havre de Grace
Click for Map
Thu -- 05:52 AM EDT     0.78 feet Low Tide
Thu -- 07:21 AM EDT     Sunrise
Thu -- 08:10 AM EDT     Moonset
Thu -- 10:49 AM EDT     2.15 feet High Tide
Thu -- 05:19 PM EDT     0.41 feet Low Tide
Thu -- 06:16 PM EDT     Sunset
Thu -- 07:00 PM EDT     Moonrise
Thu -- 11:31 PM EDT     2.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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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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