Sunday, January17, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Willow Street, PA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:22AMSunset 5:08PM Sunday January 17, 2021 12:50 AM EST (05:50 UTC) Moonrise 10:22AMMoonset 9:55PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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
    EDIT      (on/off)   Help
ANZ530 Chesapeake Bay North Of Pooles Island- 1243 Am Est Sun Jan 17 2021
.small craft advisory in effect through this afternoon...
Overnight..W winds 15 kt with gusts to 20 kt. Waves 2 ft.
Sun..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sun night..SW winds 5 to 10 kt. Waves 1 ft.
Mon..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Mon night..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tue..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tue night..W winds 5 to 10 kt. Waves 1 ft.
Wed..W winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft.
Thu..W winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance of snow showers after midnight.
ANZ500 1243 Am Est Sun Jan 17 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Another upper level trough will swing through the region tonight, which could result in small craft advisories for portions of the waters. High pressure builds to the south of our region through the early parts of next week. Small craft advisories may be needed again on Wednesday.


7 Day Forecast for Marine Location Near Willow Street, PA
   Hourly   EDIT   Help
location: 39.97, -76.27     debug


Area Discussion for - State College, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KCTP 170402 AFDCTP

Area Forecast Discussion National Weather Service State College PA 1102 PM EST Sat Jan 16 2021

SYNOPSIS. An upper level low, over Pennsylvania this evening, will lift northeast of the state tonight.

Following today will be a string of similar days with periods of lake effect and upslope snow showers for the Laurel Highlands and Alleghenies of Northern and Western PA. Temperatures will still be slightly above normal during the daytime and above normal at nighttime for the next few days, as well. A front in mid to late week could bring a quick shot of light snow to much of the area.

NEAR TERM /THROUGH SUNDAY/. Some decent squalls still noted on radar late this evening along I-80. However, expect coverage and intensity of snow showers/squalls to diminished overnight, as boundary layer cools and upper low departs. Relatively deep moisture behind departing upper low will support lingering light upslope snow across the Allegheny Plateau late tonight. The best orographic forcing over the Laurel Highlands should support an additional 1-3 inches overnight across Somerset/Cambria counties, with the highest totals along Laurel Ridge.

Elsewhere, large scale subsidence in wake of departing upper low and downsloping westerly flow should result breaking clouds and nothing more than passing flurries along and east of I-99 tonight. An active westerly breeze and nearly neutral temp advection suggests temperatures won't fall much from 00Z readings, with lows ranging from the upper 20s across the Alleghenies, to the low 30s in the Susq Valley.

Light upslope snow will continue to fall over the Alleghenies Sunday, while downsloping subsidence results in partly sunny skies further east. Upper level ridging building into the state will likely result in a midday lull in the orographic snow across the Alleghenies. However, increasing forcing/rising inversion heights are expected toward evening ahead of next shortwave approaching from the Ohio Valley. Have thus ramped up POPs late in the day, mainly across the northwest mountains.

Max temps Sunday will be similar to Saturday's, ranging from the low 30s over the Alleghenies, to the low and mid 40s over the Susq Valley. However, a gusty wind will make it feel colder. Bufkit soundings support gusts between 20-30mph.

SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/. The medium range period will be dominated by seasonably cold air reinforced with the passage of several northern stream shortwave troughs and weak, relatively moisture-starved sfc cold fronts.

Expect scattered to numerous snow showers through the first part of next week across the Allegheny Plateau with moderately deep cold air and the favorable DGZ thermal ribbon base (at just 5-6 kft agl), well within the anticipated lake effect and orographic cloud layer.

Across the Central Ridge and Valley Region, this persistent west-northwest (flow accentuated by weak to moderate mesoscale lift with the occasional passage of upper level troughs) will bring flurries and isolated/narrow bands of snow showers through early week.

Look for an inch or so of snow during numerous 12-hour periods over the NW Mtns and Laurel Highlands (with favored lake effect and orographic locations seeing up to 3 inches at times), while the region SE of the Allegheny Front sees just a light dusting of snow from time to time.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Medium range guidance all support generally fair weather with diminishing snow showers over the western mountains Wednesday, as ridging builds into the state. A northern stream shortwave and associated surface low are progged to track well north of Pa Thursday. A bit of very light snow appears possible associated with the warm advection ahead of trailing cold front.

Model guidance is in exceptional agreement days 6-7, all indicating a low amplitude trough over the northeast CONUS, bringing seasonably chilly weather and a chance of snow showers over the northwest mountains.

AVIATION /04Z SUNDAY THROUGH THURSDAY/. Expect some snow showers across western areas this evening with occasional VIS drops at BFD, UNV, JST and AOO. Otherwise it will be breezy with generally MVFR conditions except for brief periods of IFR in snow showers over the western airspace. VFR conditions expected through the night over the east at IPT, MDT and LNS.

Outlook .

Sun and Mon . Chance of -SHSN at BFD and JST, otherwise no sig wx.

Tue-Wed . Mainly VFR conditions.

CTP WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory until 7 AM EST Sunday for PAZ024-033.

SYNOPSIS . Lambert/Dangelo NEAR TERM . Fitzgerald SHORT TERM . Banghoff LONG TERM . Fitzgerald AVIATION . Lambert/Travis


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 39 mi50 min W 7 G 8.9 38°F 40°F1002.5 hPa (+1.4)
DELD1 - 8551762 - Delaware City, DE 45 mi50 min W 6 G 11 37°F 31°F1002 hPa (+1.5)
MRCP1 - 8540433 - Marcus Hook, PA 47 mi50 min 38°F 40°F1001.2 hPa (+1.4)
RDYD1 - 8551910 - Reedy Point, DE 47 mi50 min 37°F 41°F1001.5 hPa (+1.5)

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last
24hr
SE2
SE2
SE5
SW3
SW2
SW2
NW5
W4
W4
G7
W5
G8
W7
G11
W7
G13
W8
G11
W7
G12
NW9
G14
NW8
NW4
W2
W3
G6
W4
W5
G8
W6
G9
W5
G9
W7
1 day
ago
SE1
W1
--
--
--
--
--
E1
E3
G6
E6
E6
SE7
G10
SE9
G15
SE8
G15
SE9
G15
SE7
G10
SE6
SE4
G14
SE3
G6
E1
SE1
NW1
E2
E2
2 days
ago
--
--
--
S1
NW2
NW1
W1
NE1
--
NW3
W3
W1
NW2
--
--
--
--
SE1
NW1
--

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA10 mi57 minW 810.00 miMostly Cloudy35°F26°F70%1001.3 hPa
Chester County Airport, PA21 mi75 minVar 6 G 1310.00 miFair34°F28°F81%1001 hPa

Link to 5 minute data for KLNS

Wind History from LNS (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrE5E5CalmNW12NW8NW8NW6W6W8W10W11W11NW10W11W12NW10W12W12W10W10W12W10W10W8
1 day agoNE4E5SE4E4E5E7E4E4E6E7E9E9E6SE11E13E9E9E9E11SE10S7S3E3NE3
2 days agoCalmSE3CalmCalmSE3E3CalmCalmCalmW5W3W5W5W4W5W4W4CalmCalmNE3NE3E3E4Calm

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Port Deposit
Click for Map
Sun -- 01:30 AM EST     2.12 feet High Tide
Sun -- 07:22 AM EST     Sunrise
Sun -- 09:17 AM EST     -0.16 feet Low Tide
Sun -- 10:20 AM EST     Moonrise
Sun -- 01:32 PM EST     1.35 feet High Tide
Sun -- 05:07 PM EST     Sunset
Sun -- 08:39 PM EST     -0.50 feet Low Tide
Sun -- 09:54 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.72.12.11.91.51.10.70.3-0-0.2-0.10.40.91.31.31.10.80.40-0.3-0.5-0.5-0.20.4

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
   EDIT      (on/off)   Help   One Week of Data
Havre de Grace
Click for Map
Sun -- 12:02 AM EST     1.98 feet High Tide
Sun -- 07:10 AM EST     -0.20 feet Low Tide
Sun -- 07:22 AM EST     Sunrise
Sun -- 10:20 AM EST     Moonrise
Sun -- 12:55 PM EST     1.62 feet High Tide
Sun -- 05:07 PM EST     Sunset
Sun -- 07:09 PM EST     0.06 feet Low Tide
Sun -- 09:54 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
21.91.61.20.70.3-0-0.2-0.10.20.71.21.51.61.51.20.90.50.20.10.10.50.91.4

Weather Map
       (on/off)   Help Weather Map
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
Ground Weather Radar Station




Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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 numerous 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.