Tuesday, September28, 2021
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Marine Weather and Tides
Refton, 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 6:57AMSunset 6:53PM Tuesday September 28, 2021 1:12 PM EDT (17:12 UTC) Moonrise 10:27PMMoonset 1:20PM Illumination 52% Phase: Third Quarter Moon; Moon at 22 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- 1036 Am Edt Tue Sep 28 2021
Rest of today..W winds 10 kt. Waves 1 ft. A chance of showers. A slight chance of tstms late this morning, then a chance of tstms this afternoon.
Tonight..N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Wed..N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft or less.
Thu..N winds 5 to 10 kt. Waves 1 ft.
Thu night..N winds 5 to 10 kt. Waves 1 ft.
Fri..NW winds 5 to 10 kt. Waves 1 ft or less.
Sat..NW winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1036 Am Edt Tue Sep 28 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the waters late tonight. Canadian high pressure will then build southward toward the waters through the end of the work week, continuing into the weekend. Small craft advisories may be needed for portions of the waters on Wednesday.


7 Day Forecast for Marine Location Near Refton, PA
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location: 39.88, -76.27     debug


Area Discussion for - State College, PA
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FXUS61 KCTP 281602 AFDCTP

Area Forecast Discussion National Weather Service State College PA 1202 PM EDT Tue Sep 28 2021

SYNOPSIS. A cold front will bring scattered showers and thunderstorms to central Pennsylvania through this evening. A dry and seasonal weather pattern is expected for the rest of the week with some chilly nights as the calendar flips from September to October.

NEAR TERM /UNTIL 8 PM THIS EVENING/. Lead vort max and shower/tstm complex has largely dissipated as of 15Z. The main pcpn driver will now be the primary sfc cold front pushing south-southeast from the I-80 corridor.

The early morning rain and associated extensive cloud cover may limit instability for another round of t-storms this afternoon. Cloud trends as well as speed of the front will be monitored with categorical MRGL/SLGT risk outlooks covering much of the lower Susquehanna Valley. Risk level may be shifted to the south with the 1630Z update later this morning.

Conditions should dry out from northwest to southeast by Tuesday evening behind the cold front.

SHORT TERM /8 PM THIS EVENING THROUGH 6 AM WEDNESDAY/. Lingering light showers and storms along the PA/MD border this evening will end or shortly past sunset. Drier and cooler air shifts southward over the rest of central PA by late tonight, and expect lows more typical of late September by Wednesday morning, ranging from the lower 40s north to the lower 50s southeast. Canadian surface high pressure builds into the area on Wednesday, bringing seasonable to slightly below average temperatures, NW flow, and mostly sunny skies.

LONG TERM /WEDNESDAY THROUGH MONDAY/. Upper-level low pressure will drop southward to a position over New England on Wednesday, while a cold front pushes well south of Pennsylvania. Building surface high pressure will lead to an extended stretch of fairly benign weather and seasonably cool temperatures from Wednesday through Saturday. We will have some cool nights, with the chilliest being Thursday night, when we could see the first frost of the season in the normally colder spots across northern PA.

For the second half of the weekend into early next week, models show the persistent upper-level low over New England finally beginning to lift away from the area. At the same time, an upper-level trough will dig over the Great Lakes and should aid in the development of surface low pressure. This would result in increasingly unsettled weather for the upper Ohio Valley into the Mid-Atlantic region. Although there is considerable uncertainty in the fine details this far out, have maintained at least slgt chance POPs late this upcoming weekend through early next week.

AVIATION /16Z TUESDAY THROUGH SATURDAY/. As of 12z Tue, an MCS is pushing slowly southeastward with backbuilding convection near UNV and leading stratiform precip toward the southeast of the convection. Just to the north of the MCS, a cold front is pushing from north to south. Expect sub-VFR vsby with heavy rain in the MCS and sub-VFR cigs along and behind the front over the northwest 1/2 of the airspace into this afternoon with some marginal improvement likely by early evening.

Outlook .

Wed-Fri . AM valley fog, then VFR.

CLIMATE. Harrisburg's latest 90-degree day on record is Oct. 7 in the 1941. With summer in the rearview mirror and given the fall pattern going forward, it's probably safe to say that there won't be any more 90 degree days this year.

So in 2021, Harrisburg likely finishes with 34 days where the maximum temperature was >= 90F. That ties 2010 and 1955 with the 14th highest on record. The top 3 are 1966 (60), 1944 (48), and 1943 (46). h/t @ajuklo for the callout on Twitter.

More interestingly, 2021 currently ranks 2nd for the number of days with minimum temperatures >= 70F in Harrisburg. The top 3 are 2020 (50), 2021 (48), and 2016 (42). 8 of the top 10 years are in the 2000s Those warm summer nights.

CTP WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . DeVoir/Steinbugl NEAR TERM . Steinbugl SHORT TERM . DeVoir/Fitzgerald/Steinbugl LONG TERM . Fitzgerald/Evanego AVIATION . Colbert/Gutierrez CLIMATE . Steinbugl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 34 mi55 min WSW 5.1 G 8.9 73°F 71°F1011.5 hPa
DELD1 - 8551762 - Delaware City, DE 42 mi55 min WNW 2.9 G 4.1 74°F 72°F1011.1 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi55 min 75°F 73°F1010.5 hPa
BLTM2 - 8574680 - Baltimore, MD 45 mi55 min W 2.9 G 8.9 76°F 75°F1011.3 hPa
MRCP1 - 8540433 - Marcus Hook, PA 46 mi55 min 73°F 72°F1011.1 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 46 mi55 min SSW 2.9 G 4.1 74°F 72°F1011.8 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 48 mi55 min W 9.9 G 13 76°F 1011.6 hPa
FSNM2 48 mi55 min WSW 9.9 G 13 76°F 1011.7 hPa

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA17 mi20 minW 910.00 miOvercast72°F61°F68%1011.3 hPa
Chester County Airport, PA23 mi18 minW 8 G 1810.00 miFair73°F63°F69%1012.2 hPa

Link to 5 minute data for KLNS

Wind History from LNS (wind in knots)
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SW12SW9S7SW8SW5S3CalmCalmCalmCalmCalmCalmN4CalmSW4CalmSW5W3W10W12W9
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W8W5CalmS3CalmW3W3CalmCalmCalmCalmSE3CalmCalmCalmCalmW5SW10SW10SW14
2 days agoW7W4W6NW5W5W4CalmW3CalmCalmW4NW5W6W8W7W8W7W8CalmW6NW10NW9NW15
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Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Tue -- 04:24 AM EDT     3.36 feet High Tide
Tue -- 06:58 AM EDT     Sunrise
Tue -- 12:56 PM EDT     1.58 feet Low Tide
Tue -- 02:17 PM EDT     Moonset
Tue -- 04:18 PM EDT     2.17 feet High Tide
Tue -- 06:51 PM EDT     Sunset
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 10:56 PM EDT     0.91 feet Low Tide
Tue -- 11:27 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.92.53.13.33.33.22.92.62.321.81.61.61.722.22.121.71.41.210.9

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland (2)
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Havre de Grace
Click for Map
Tue -- 03:31 AM EDT     2.81 feet High Tide
Tue -- 06:57 AM EDT     Sunrise
Tue -- 11:28 AM EDT     1.31 feet Low Tide
Tue -- 02:17 PM EDT     Moonset
Tue -- 03:25 PM EDT     1.81 feet High Tide
Tue -- 06:51 PM EDT     Sunset
Tue -- 09:28 PM EDT     0.75 feet Low Tide
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 11:27 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.72.22.62.82.82.62.42.11.91.61.41.31.31.51.71.81.81.61.41.10.90.80.81

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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