Friday, April3, 2020
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Marine Weather and Tides
Chambersburg, PA

Version 3.4
NOTICE
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 6:48AMSunset 7:38PM Friday April 3, 2020 11:53 AM EDT (15:53 UTC) Moonrise 1:20PMMoonset 3:22AM Illumination 80% 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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ANZ538 Patapsco River Including Baltimore Harbor- 1114 Am Edt Fri Apr 3 2020
.small craft advisory in effect through this evening...
Rest of today..NW winds 15 kt with gusts to 30 kt. Waves 2 ft.
Tonight..N winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 to 2 ft.
Sat..NE winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds around 5 kt. Waves flat.
Sun..S winds around 5 kt. Waves flat.
Sun night..W winds around 5 kt. Waves flat.
Mon..SW winds around 5 kt. Waves flat.
Tue..S winds 5 kt. Waves less than 1 ft. A chance of showers.
ANZ500 1114 Am Edt Fri Apr 3 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure southeast of cape cod will loop cyclonically back out to sea through tonight. High pressure will build in from the midwest tonight through Sunday morning. A weak cold front will follow Sunday night. The front will stall nearby Monday into Tuesday before returning north as a warm front.


7 Day Forecast for Marine Location Near Chambersburg , PA
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location: 39.93, -77.66     debug


Area Discussion for - State College, PA
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FXUS61 KCTP 031442 AFDCTP

Area Forecast Discussion National Weather Service State College PA 1042 AM EDT Fri Apr 3 2020

SYNOPSIS. A cooler and breezy end to the week with early sunshine giving way to a mostly cloudy sky through the day. Light rain showers will be across eastern Pennsylvania through the afternoon before dissipating tonight. A warming trend is expected over the weekend into early next week with little to no rainfall expected.

NEAR TERM /UNTIL 8 PM THIS EVENING/. Trended POPs a bit higher over the northeast zones today based on the latest radar trends and hires model blends. Clouds will continue to back into the area from the northeast, wrapping around a vigorous cyclonic circulation drifting west-southwest offshore the New England coast. There could be a few wet snowflakes over the Pocono Plateau and Endless Mountains this morning. Occasional rain showers this afternoon are expected to dissipate by tonight.

High temperatures will be a few degrees cooler than Thursday, generally in the mid 40s to mid 50s. Breezy conditions will continue through the afternoon, with a northwest wind gusting up to 30 mph.

SHORT TERM /8 PM THIS EVENING THROUGH 6 PM SATURDAY/. As the low moves east, winds will diminish tonight. Clearing skies and light winds under the building sfc high will promote patchy valley fog by early Saturday morning, especially north of I80. AFter patchy morning fog Saturday morning, expect gradual improvement from west to east. Low clouds will last longest across the east. Expect seasonable temperatures in the mid 50s to near 60.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/. A weak, moisture-deprived cold front will advance from west to east through Sunday morning and afternoon. With the passage of this front, a few light showers are possible, mainly in the western mountains. In its wake, Monday will be a gorgeous day with only mid- and high- level clouds as a small area of high pressure moves across the area. Highs on Monday will generally be in the 60s.

The remainder of the first full week in April appears to be unsettled with above average temperatures and periods of showers. There are considerable differences among the long range models in how much ridging/warm air builds over the east next week. For now, keeping chance PoPs area-wide Tuesday through Thursday. If warm air does push far enough north, there is potential for some thunderstorms Wednesday or Thursday ahead of an approaching cold front. For now, kept tstm wording out of the forecast.

AVIATION /15Z FRIDAY THROUGH TUESDAY/. Sct mid-level altocu clouds spreading in from the NE through the morning commute hours.

For the late morning and afternoon hours this Friday, we'll see a transition to a several-8 hour period of MVFR then IFR to low end MVFR for the later this afternoon through early tonight as deeper moisture wraps around the strong low pressure area spinning a few hundred miles to the ESE of Cape Cod.

A few light showers are possible at all TAF sites, but the greatest coverage will occur across the NE half of PA. Outside of the Susq Valley, the scattered coverage on average should limit mention to VCSH across Central PA rather than timing any potential small clusters of showers that will be drifting from NE to SW across the region.

Northwest winds averaging 10 to 15 kts this morning will increase again during the day today with gusts mainly in the 20-25 kt range.

Winds will diminish and veer more to the north after 00z Sat. Light winds and ample moisture beneath a low level inversion will support low clouds and maybe some valley late tonight and Sat morning, mainly in the north.

Outlook.

Sat . Patchy AM fog and low cigs, mainly north . then VFR

Sun . Cold frontal passage expected, with a few light rain showers possible in the PM.

Mon . No significant weather expected.

Tues . SHRA possible with warm front

CTP WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Steinbugl NEAR TERM . Steinbugl SHORT TERM . DeVoir/Colbert LONG TERM . Gartner/Colbert AVIATION . Lambert


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 73 mi53 min N 9.9 G 17 54°F 48°F1008.4 hPa (+0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 78 mi53 min NNW 20 G 23 53°F 1008.1 hPa (+0.0)
WASD2 - 8594900 - Washington, DC 81 mi53 min NW 13 G 24 55°F 55°F1009.9 hPa (-0.4)

Wind History for Baltimore, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hagerstown, Washington County Regional Airport, MD16 mi60 minNW 19 G 2610.00 miFair and Breezy54°F28°F37%1011.6 hPa

Link to 5 minute data for KHGR

Wind History from HGR (wind in knots)
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NW13NW13NW8NW116NW7W11W4NW12NW5NW7NW12NW16
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1 day agoN7N8NW7N6N7NW6NW5NW9NW5NW3NW4N6N11N4NW4W3NW10W8NW6NW10NW9NW14NW11NW14
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2 days agoE6E6E3E6E4E6E4E6E6E6E6E5E6NE5E6E7NE4N4NW3NW5NW5NW5NW5N6

Tide / Current Tables for Middle Branch, Baltimore Harbor, Maryland
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Middle Branch
Click for Map
Fri -- 03:15 AM EDT     0.92 feet High Tide
Fri -- 04:15 AM EDT     Moonset
Fri -- 06:47 AM EDT     Sunrise
Fri -- 09:27 AM EDT     0.16 feet Low Tide
Fri -- 02:17 PM EDT     Moonrise
Fri -- 03:51 PM EDT     1.27 feet High Tide
Fri -- 07:32 PM EDT     Sunset
Fri -- 11:03 PM EDT     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.80.90.90.80.60.40.30.20.20.30.50.81.11.21.31.21.10.90.70.50.40.3

Tide / Current Tables for Middle Branch, Baltimore Harbor, Patapsco River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of Mid-Atlantic    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 (11,2,3,4)
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Ground Weather Radar Station Sterling, VA
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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 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.