Thursday, April22, 2021
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Marine Weather and Tides
Felton, 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 6:16AMSunset 7:53PM Thursday April 22, 2021 9:52 AM EDT (13:52 UTC) Moonrise 1:39PMMoonset 3:07AM Illumination 81% Phase: Waxing Gibbous; Moon at 10 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- 933 Am Edt Thu Apr 22 2021
.small craft advisory in effect through late tonight...
Rest of today..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
Tonight..NW winds 15 to 20 kt with gusts to 30 kt... Becoming W 10 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft.
Fri..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Fri night..W winds 5 to 10 kt. Waves 1 ft.
Sat..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sat night..E winds 5 to 10 kt. Waves 1 ft. Rain.
Sun..NW winds 10 to 15 kt. Waves 1 to 2 ft. Rain likely in the morning.
Mon..N winds 5 to 10 kt. Waves 1 ft or less.
ANZ500 933 Am Edt Thu Apr 22 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build to the west today before settling to our south Friday. Low pressure will pass through the waters this weekend. Small craft advisories will likely be needed this 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 221115 AFDCTP

Area Forecast Discussion National Weather Service State College PA 715 AM EDT Thu Apr 22 2021

SYNOPSIS. A late April cold snap will bring subfreezing temperatures and gusty winds early today and again early Friday morning. Low pressure will track south of the state, bringing a widespread and chilly light to moderate rainfall Saturday night and early Sunday. Conditions will trend warmer and drier early next week. Temperatures could touch 80 degrees by the middle of the week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. A weak mid level short wave embedded in the larger scale NW flow across the NE U.S. will track across SW PA early today, with another dropping SSE from NY state for later this morning and this afternoon.

The initial disturbance will be accompanied by more focused llvl convergence and orographic lift of the upstream Glake moisture with temps in the upper half of the approx 8 kft thick of the cloud bearing layer within the favorable DGZ.

We've seen some persistent albeit narrow moderate to heavy bands of snow drifting over the same region of the Laurel Highlands over the past several hours with vsbys generally in the 1/2 to 1 1/2SM range, though as confirmed by the most recent KJST ASOS Ob, the highest reflectivities of 25-30 dBZ were supporting 1/4SM vsbys. We've issued a few Special Weather Statements to highlight the late season snow impact to travel across several of our SW CWA zones.

Painted in 1-2 inches of snow within about 15 miles of KJST this morning, with lesser amounts as the bands weaken a bit further to the east-southeast in the Scent Ridge and valley Region. Elsewhere expect areas of a coating to perhaps one inch of snow during the mid to late morning hours as the second short wave drifts in from NY.

For the rest of the region and this afternoon, we'll see plenty of clouds and scattered flurries turning to sprinkles throughout the valleys.

Deep mixing up to 6-8 kft agl this afternoon per the latest RAP Bufkit soundings taps winds of 30 to 35 kts, which should reach the sfc as gusts of 25-30 kts in most locations.

Temperatures were in the mid 20s to lower 30s from the north to south across the state as of 08Z, except for the larger cities in the SE where readings were still between 33 and 37F.

A freeze warning remains up for parts of south central PA, where the growing season is underway. No frost is expected due to persistent/gusty winds.

Max temps this afternoon will be -15F to -20F below average (40-50F). The gusty winds will add to the chill with wind chills running about 10F lower than air temps.

Another cold night expected tonight with some risk for a freeze; frost again looks unlikely given gradient wind flow with HP centered to the south of CPA.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/. Not a lot of change. Looking at mainly dry conditions tonight into Saturday, with a moderating trend.

Still looking at some rain late Saturday into early Sunday associated with surface low tracking south of Pa. Timing similar to the last few days.

LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/. Not much spread among medium range guidance, all of which indicate anomalous upper level ridging building over the eastern conus. Thus, confidence is high for dry weather and rising temperatures.

Any rain Sunday morning should taper off fairly quickly, as surface low passes off the Mid Atlantic coast. A decent pressure gradient in its wake should result in a breezy Sunday with temperatures close to seasonal. Surface high should build over the state Monday with light wind and near average temperatures.

Much warmer air should arrive by Tuesday, as the high passes off of the coast and a return southwest flow ensues. ECENS 850 temps surge to 12-14C by Wednesday, which should translate to highs in the upper 70s and low 80s.

Latest guidance indicates upstream upper trough and associated cold front will remain well west of the area through mid week, but based on NBM have included just a slight chance of showers over the western counties late Wednesday.

AVIATION /11Z THURSDAY THROUGH MONDAY/. At 11z, upsloping NW flow continues to produce borderline MVFR/IFR cigs and vsbys over the Laurel Highlands /JST/ in occasional snow showers. MVFR cigs and vsbsys are also possible this morning at AOO and UNV, with scattered snow showers nearby. Elsewhere, VFR conds will persist.

All sites will gradually become VFR today, with JST likely taking the longest to see improvement. Wind will be gusty /20-30kts/ from 280-320 degrees through this afternoon.

Outlook .

Fri . VFR. Winds subside.

Sat . VFR early, with late-day restrictions likely in developing rain.

Sun . Showers/reduced cigs early; trending drier Sunday night. Gusty winds.

Mon . Becoming VFR, with gusty winds subsiding.

CTP WATCHES/WARNINGS/ADVISORIES. Freeze Warning until 9 AM EDT this morning for PAZ026>028-035- 036-049>052-056-057-059-063>066.

SYNOPSIS . Lambert NEAR TERM . Lambert SHORT TERM . Lambert LONG TERM . Fitzgerald AVIATION . Evanego


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 42 mi52 min W 6 G 9.9 41°F 55°F1015.7 hPa (+1.2)
CHCM2 - 8573927 - Chesapeake City, MD 45 mi52 min WNW 14 G 19 40°F 57°F1015.5 hPa (+1.3)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 46 mi52 min W 16 G 18 41°F 1015.8 hPa (+1.0)
FSNM2 46 mi52 min W 16 G 20 41°F 1015.2 hPa (+0.8)
TCBM2 - 8573364 - Tolchester Beach, MD 49 mi52 min WNW 13 G 19 41°F 53°F1016.3 hPa (+1.2)

Wind History for Baltimore, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
York, York Airport, PA18 mi59 minWNW 9 G 1910.00 miOvercast38°F24°F57%1015.5 hPa
Lancaster, Lancaster Airport, PA21 mi59 minWNW 1210.00 miA Few Clouds39°F21°F48%1014.6 hPa

Link to 5 minute data for KTHV

Wind History from THV (wind in knots)
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2 days agoW3NW3CalmSE33SW4N34NW3CalmS3S4S6S7S9SW73CalmCalmCalmCalmNE3NE3W6

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
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Thu -- 02:36 AM EDT     0.86 feet Low Tide
Thu -- 04:05 AM EDT     Moonset
Thu -- 06:16 AM EDT     Sunrise
Thu -- 07:08 AM EDT     2.31 feet High Tide
Thu -- 02:18 PM EDT     0.71 feet Low Tide
Thu -- 02:37 PM EDT     Moonrise
Thu -- 07:33 PM EDT     2.69 feet High Tide
Thu -- 07:49 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.310.90.91.21.62.12.32.221.71.41.10.80.70.81.11.72.32.62.72.52.21.9

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland (2)
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Havre de Grace
Click for Map
Thu -- 01:08 AM EDT     0.71 feet Low Tide
Thu -- 04:05 AM EDT     Moonset
Thu -- 06:15 AM EDT     1.93 feet High Tide
Thu -- 06:16 AM EDT     Sunrise
Thu -- 12:50 PM EDT     0.59 feet Low Tide
Thu -- 02:37 PM EDT     Moonrise
Thu -- 06:40 PM EDT     2.25 feet High Tide
Thu -- 07:49 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.811.41.81.91.91.71.41.10.80.60.60.71.11.51.92.22.22.11.81.51.2

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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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