Friday, September17, 2021
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Marine Weather and Tides
Lancaster, 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 6:47AMSunset 7:11PM Friday September 17, 2021 8:56 AM EDT (12:56 UTC) Moonrise 4:55PMMoonset 1:48AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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- 735 Am Edt Fri Sep 17 2021
Today..NE winds 10 kt. Waves 1 ft. Isolated tstms. Isolated showers this morning, then scattered showers this afternoon.
Tonight..NE winds 5 to 10 kt. Waves 1 ft. Scattered showers. Areas of fog. Vsby 1 to 3 nm.
Sat..N winds 5 kt. Waves less than 1 ft.
Sat night..NW winds 5 to 10 kt. Waves 1 ft or less.
Sun..N winds 5 to 10 kt. Waves 1 ft.
Sun night..NE winds around 5 kt. Waves 1 ft or less.
Mon..E winds 5 to 10 kt. Waves 1 ft or less.
Tue..SE winds 5 to 10 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 735 Am Edt Fri Sep 17 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain anchored near new england while low pressure tracks off the mid atlantic coast through Friday. A weak cold front will approach Saturday before stalling out nearby Saturday night into Sunday. High pressure will build overhead later Sunday before moving offshore Monday and Tuesday.


7 Day Forecast for Marine Location Near Lancaster, PA
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location: 40.04, -76.3     debug


Area Discussion for - State College, PA
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FXUS61 KCTP 171111 AFDCTP

Area Forecast Discussion National Weather Service State College PA 711 AM EDT Fri Sep 17 2021

SYNOPSIS. The persistent on-shore flow over PA will break down tonight as the somewhat tropical low off the East Coast recurves to the northeast. A weak and mainly dry cold front will pass through on Saturday. High pressure will cover the region Sunday and Monday. A strong cold front is forecast to approach the area around the first day of Fall.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Only tweaks to the next couple of hours T/Td grids. All the rest is doing fine.

Prev . Just a patch or two of drizzle out there. There are some weak, but real precip echoes on the radar. The ground is wet here at the office. There are some breaks in the low cloud cover but they are transient and morph rapidly. Expect little change to the overall cloudy sky for the morning. Heating could break the low clouds later this morning and afternoon. If the heating is successful in mixing the moisture up, it could also break thru a layer of milder air aloft around 5kft. There is a second capping inversion around 12kft, and that is stronger. It will likely keep any showers from becoming too tall and making any thunder. But, we will keep just a slight chc of TSRA this aftn south of the turnpike. Maxes will again be negatively impacted by the clouds. But, the temps will still be above normals, as we start the day out +15F from normals. Maxes in the NW will be 5-10F higher than normal as temps will be a rather homogeneous m-u70s across the entire CWA.

SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/. The cloud forecast for tonight is tough. We will lose our persistent flow off the ocean early in the night, but the moisture already here will likely get trapped under the nocturnal inversion. A weak pre-frontal trough could make isold/sct SHRA thru the night in the NW, but might not make it farther SE than UNV. If there are breaks in the clouds, there will be some fog due to the residual moisture and light/calm wind at the sfc.

The real front will push into the NW just after sunrise Sat. The forcing is very weak and there is only a thin ribbon of high PWATs coincident with the front. The front does not intensify as it moves through with almost no sfc convergence to speak of. So, while a brief downpour is slightly possible, the warm air aloft will make it difficult to generate deep convection and thunder. Will still leave in the mention of thunder for much of the area since SPC still mentions thunder for the entire CWA, but the threat is pretty weak. The isold/sct coverage of any SHRA on Sat will be very close to the front as it tracks thru the CWA from NW to SE from 8AM in the far NW until it exits the SE around 8PM. Maxes will be 75-80F in the NW half of the area, and 80-85F SE where they will have longer to cook before the front arrives with the drier/cooler air.

Drying Saturday night will drop the dewpoints into the l50s at BFD, and nudge them down to the l60s in the SE piedmont.

LONG TERM /SUNDAY THROUGH THURSDAY/. Little change in guidance for the extended period. The cold front will drift to our south on Sunday with surface high pressure settling overhead. This should lead to dry weather Sunday and into early next week with lower humidity and comfortable temperatures. The high will drift to our east by next Tuesday and Wednesday with more moist return southerly flow which may lead to more humidity.

There will be a better chance for showers Wednesday or Thursday depending on the timing of a stronger cold front that is expected to move through the Northeast. This front may usher in a period of more fall like weather toward the end of next week.

AVIATION /11Z FRIDAY THROUGH TUESDAY/. Little change since the 6Z TAFs. Added in VCSH for northern terminals /BFD . IPT/ but other locations could see a shower this afternoon too, just less confidence in those places.

Prev . Low clouds have settled in for the night by the time of the 6Z TAF package. Most airfields will remain at MVFR for most of the overnight period, then cigs will continue to lower by 10-12Z. Fog/reductions in vis are possible in isolated spots tonight as well but nothing widespread is expected. For BFD, IFR conditions are expected for the overnight period, with possible lower cigs over the next few hours. A sprinkle or drizzle cannot be ruled out.

Conditions improve and clouds will scatter out through the morning, and VFR conditions are expected by late morning/early afternoon.

MVFR restrictions are possible this afternoon in scattered SHRA/TSRA.

Outlook .

Sat . PM SHRA/TSRA possible.

Sun-Mon . Widespread VFR.

Tues..SHRA/TSRA possible SW.

CLIMATE. Fall Equinox 2021 will be at 3:20 PM (1920 UTC) on Wednesday, September 22.

CTP WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Dangelo NEAR TERM . Dangelo SHORT TERM . Lambert/Dangelo/Steinbugl LONG TERM . Lambert/DeVoir/Travis AVIATION . Wagner CLIMATE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 44 mi57 min ENE 5.1 G 7 73°F 76°F1023 hPa (+1.4)
DELD1 - 8551762 - Delaware City, DE 49 mi57 min NE 8 G 9.9 73°F 1022.9 hPa (+1.4)
MRCP1 - 8540433 - Marcus Hook, PA 50 mi57 min 73°F 73°F1022.6 hPa (+1.1)

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA6 mi64 minENE 310.00 miOvercast72°F67°F84%1023.6 hPa
Chester County Airport, PA23 mi62 minNNE 34.00 miFog/Mist70°F70°F100%1024.4 hPa

Link to 5 minute data for KLNS

Wind History from LNS (wind in knots)
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Last 24hrNE6E7E7NE7E7E8E11E10E11E13E8E6E4NE4E6E4NE7E6E6E6E4CalmNE5E3
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2 days agoCalmCalmCalmCalmSW5SW4SW8S7S8S10S6S4SE7SE4SE4E4S4E3S3CalmNE4SE3CalmCalm

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Fri -- 02:32 AM EDT     0.77 feet Low Tide
Fri -- 02:48 AM EDT     Moonset
Fri -- 06:47 AM EDT     Sunrise
Fri -- 08:31 AM EDT     3.73 feet High Tide
Fri -- 04:40 PM EDT     1.12 feet Low Tide
Fri -- 05:53 PM EDT     Moonrise
Fri -- 07:09 PM EDT     Sunset
Fri -- 08:35 PM EDT     2.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.90.80.81.11.82.63.33.73.73.53.22.82.41.91.41.21.11.522.42.52.32

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
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Havre de Grace
Click for Map
Fri -- 01:06 AM EDT     0.40 feet Low Tide
Fri -- 02:48 AM EDT     Moonset
Fri -- 06:47 AM EDT     Sunrise
Fri -- 07:12 AM EDT     2.60 feet High Tide
Fri -- 02:43 PM EDT     0.29 feet Low Tide
Fri -- 05:53 PM EDT     Moonrise
Fri -- 07:09 PM EDT     Sunset
Fri -- 08:07 PM EDT     1.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.50.91.422.42.62.52.321.61.10.70.40.30.511.51.821.91.61.3

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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