Friday, December6, 2019
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Marine Weather and Tides
Lancaster, PA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:11AMSunset 4:41PM Friday December 6, 2019 12:51 AM EST (05:51 UTC) Moonrise 1:56PMMoonset 1:24AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 1238 Am Est Fri Dec 6 2019
.small craft advisory in effect from noon est today through this afternoon...
Overnight..W winds 5 kt. Waves less than 1 ft.
Fri..SW winds 5 to 10 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 1 to 2 ft.
Fri night..NW winds 5 to 10 kt. Waves 1 ft.
Sat..N winds 5 to 10 kt. Waves 1 ft.
Sat night..E winds around 5 kt. Waves flat.
Sun..SE winds 5 kt. Waves less than 1 ft.
Sun night..S winds 5 kt. Waves less than 1 ft. A chance of showers.
Mon..SW winds 5 to 10 kt. Waves 1 ft. Showers.
Tue..W winds 10 kt. Waves 1 to 2 ft. A chance of showers.
ANZ500 1238 Am Est Fri Dec 6 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore of the carolinas through tonight. A pair of low pressure systems will split the mid-atlantic to the north and south Friday, with a cold front in between crossing the region from west to east by evening. High pressure will follow for the weekend, before a stronger area of low pressure develops over the mid-mississippi valley and tracks northeastward toward the eastern great lakes early next week. Small craft advisories may need to be extended into Saturday, and may be needed again Monday night through 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 060255 AFDCTP

Area Forecast Discussion National Weather Service State College PA 955 PM EST Thu Dec 5 2019

SYNOPSIS. Clouds will increase again overnight. Flurries to a few snow showers are likely across the northern part of the state on Friday as a weak cold front moves through. Mainly dry conditions with slightly below normal temperatures will follow for the weekend. A warm up with some rain is in store for Monday and Tuesday.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. Sfc ridge axis bisecting central PA late this evening. Clouds increase again west of this feature as return southwest boundary layer flow and warm advection increase from the Ohio Valley. Skies will become mostly cloudy to cloudy again across the north and partly to mostly cloudy south overnight. Some light snow showers forming along a quasi stnry front near the PA/NY border could brush the NW mtns toward daybreak Friday. Min temps overnight will be in the mid to upper 20s across the north, and in the low 30s across the south.

SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/. Another cold front brings a chance for snow and rain showers Friday as a fairly potent wave of sfc low pressure slides by just to our north. Prefrontal moderating return southwest flow will allow for frontal precip to begin as rain, with a changeover to snow showers as the front passes Friday afternoon and evening. Any snow accumulation will be very minor and confined to elevations AOA 2000 ft MSL across northern PA as temps will be in the low to mid 30s and QPF amounts will be AOB 0.10 of an inch.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/. Long range guidance in good agreement that a large ridge of high pressure builds over the western US towards the middle of the week and ultimately pushes eastward into the eastern US next weekend. As the high pressure system moves off the east coast, temperatures moderate next Sunday- Monday, with some GOMEX moisture streaming north- northeast along the Appalachians bringing periods of rain for next Monday into Tuesday.

AVIATION /03Z FRIDAY THROUGH TUESDAY/. Lower/VFR clouds starting to erode from S-N, but the next wave is on it's way from the NW. Wind will continue to die off, with some sites going light/var or even calm. Radar echoes over lower MI are still aloft for the most part. However, by 09-10Z a few -SHSN could reach BFD. However, the lift will stay generally to the N of the NY border. A cold front will zip through during mid-day Fri, but is starved for moisture. Thus, while the clouds may lower to MVFR by late in the day, the only other site to have a chc for precip is JST where temps should be warm enough for -SHRA which could occur in the aftn. Post- frontal winds pick back up to 12-15KT with gusts in the 20s, perhaps upper 20s in JST. The upslope flow will quickly close up any clearing immediately behind the front. But, lack of moisture and rather high inversion at first which crashes overnight should keep any time of IFR at BFD and JST rather brief Fri PM/early Sat AM. IPT/MDT/LNS should scatter out, but could have VFR cloud bkn deck.

Outlook.

Sat-Sun . VFR.

Sun night . Mainly VFR. Lowering cigs.

Mon-Tues . Widespread SHRA/MVFR. IFR poss. CFROPA Tues.

CTP WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Lambert NEAR TERM . DeVoir/Lambert SHORT TERM . Lambert LONG TERM . Lambert/Gartner AVIATION . Dangelo


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 44 mi57 min WSW 1.9 G 1.9 35°F 43°F1021.6 hPa
DELD1 - 8551762 - Delaware City, DE 49 mi57 min W 2.9 G 4.1 37°F 46°F1021.3 hPa
MRCP1 - 8540433 - Marcus Hook, PA 50 mi57 min 40°F 43°F1020.7 hPa

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA6 mi58 minW 410.00 miFair31°F23°F72%1020.9 hPa
Chester County Airport, PA23 mi76 minVar 410.00 miFair34°F23°F65%1020.7 hPa

Link to 5 minute data for KLNS

Wind History from LNS (wind in knots)
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Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Fri -- 12:41 AM EST     0.49 feet Low Tide
Fri -- 01:23 AM EST     Moonset
Fri -- 05:42 AM EST     1.98 feet High Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 01:26 PM EST     0.10 feet Low Tide
Fri -- 01:55 PM EST     Moonrise
Fri -- 04:40 PM EST     Sunset
Fri -- 06:36 PM EST     1.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.71.11.61.921.81.61.20.90.50.30.10.20.511.51.81.91.71.51.21

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
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Havre de Grace
Click for Map
Fri -- 01:23 AM EST     Moonset
Fri -- 05:01 AM EST     1.63 feet High Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 11:30 AM EST     0.13 feet Low Tide
Fri -- 01:55 PM EST     Moonrise
Fri -- 04:40 PM EST     Sunset
Fri -- 05:47 PM EST     1.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.60.91.31.51.61.51.310.60.30.20.20.40.71.21.61.81.91.71.51.10.80.5

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for State College, PA (0,6,7,8)
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Ground Weather Radar Station Philadelphia, PA
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.