Monday, December16, 2019
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Marine Weather and Tides
Laporte, 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 7:21AMSunset 4:37PM Monday December 16, 2019 5:16 AM EST (10:16 UTC) Moonrise 9:29PMMoonset 11:10AM Illumination 78% Phase: Waning Gibbous; Moon at 19 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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7 Day Forecast for Marine Location Near Laporte , PA
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location: 41.46, -76.5     debug


Area Discussion for - State College, PA
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FXUS61 KCTP 160506 AFDCTP

Area Forecast Discussion National Weather Service State College PA 1206 AM EST Mon Dec 16 2019

SYNOPSIS. The next weather system will move into southern portions of the area overnight and slowly spread north on Monday. This system will bring a mixed bag of winter precipitation with it until temperatures warm up above freezing later on Monday. Please use caution when travailing across southern Pennsylvania late tonight and Monday. An upper level trough will swing through the northeast US during the middle of the week, then high pressure will likely build in to end the week. Cold temperatures will begin to moderate by late in the work week.

NEAR TERM /THROUGH MONDAY/. Lake effect snow flurries have all but ended across the NW Mountains at mid evening. Attention quickly shifts to fast approaching swath of light snow moving through the WV/MD panhandles and timed to enter the Laurel Highlands before midnight, on schedule. Going forecast is in great shape for the overnight with Advisory in place and a slippery commute expected across the southern tier. Primarily snow expected with the first wave that tracks across central and south central PA through midday Monday. Then ptypes get tricky as steady precip ends and first upper wave tracks to the east and cloud seeders may be lost. There could continue to be scattered light snow grains or even some patchy freezing drizzle during the lull of precip across the southern half of central PA which lasts from ~18z to ~22Z, after which another batch of snow arrives and will quickly lift and change to a wintry mix Monday night.

Holding off on Advisories for the second system at this time to better message the first one and avoid confusion. Additionally, still a fair amount of uncertainty wrt how far north any freezing rain reaches Monday night, so mid shift will be given the honor of making that call. No sig changes late this evening.

SHORT TERM /MONDAY NIGHT THROUGH TUESDAY/. Messy start to the southern zones with approaching low pressure system. After initially starting as snow, as has been the case most of the last month, mild air will quickly work its way in just aloft to change the phase of the precipitation to sleet and ultimately freezing rain and then rain. With the heating of the day and milder air working in, temperatures will rise above freezing and the wintry precipitation threat will end in the afternoon, leaving the bulk of the precipitation with this system as plain rain. Will cover this with a winter weather advisory for our southern zones. Further north, the storm system will bring light snow or flurries with it, but it will be working against fairly dry low layers and rates will be light throughout much of the event. Low level warming will also turn any snow into a light wintry mix with lower qpf totals as you move north.

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/. Precipitation will cease Tuesday night as the surface wave exits off the east coast. Northwest flow will produce lake effect snow showers across the northern tier Wednesday into Thursday with gusty winds expected area-wide Wednesday afternoon. Downsloping winds will result in mostly sunny skies southeast of the Alleghenies. An approaching 1032 mb surface high will usher in below average temperatures through the end of the week. Highs are expected to be 10 to 15 degrees below normal on Thursday with below- zero wind chills for the northern tier Thursday morning.

Model spread and forecast uncertainty ramp up toward next weekend. Much of the guidance has a digging trough approaching from the midwest, so anticipate moderating temperatures ahead of this feature and a possible need to introduce a chance of rain/snow showers by Saturday.

AVIATION /06Z MONDAY THROUGH FRIDAY/.

The overnight period starts with primarily VFR cigs and vsbys with MVFR cigs at BFD. 0440Z Radar shows a leading band of snow showers is currently moving into central PA and will continue to engulf the state as the night continues. This band should reach JST and AOO around 06Z to 08Z. This system will bring widespread restrictions back into the region with MVFR-IFR ceilings and vsbys in snow. As warmer air changes precip through a wintry mix and then to plain rain over the southern half later Monday into Mon night, vsbys will improve but widespread ceiling restrictions will remain. IFR will dominate tomorrow.

Outlook.

Mon . PM low cigs/wintry mix possible.

Tue . Low cigs NW, improving conditions elsewhere.

Wed . Restrictions likely north/west with snow showers.

Thu and Fri . No restrictions expected.

CTP WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory until 4 PM EST Monday for PAZ033>036- 063>066.

SYNOPSIS . Ross/Fitzgerald NEAR TERM . Ross/DeVoir/Fitzgerald SHORT TERM . Ross/Fitzgerald LONG TERM . Ross/Banghoff AVIATION . Ceru/Gartner


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Williamsport - Lycoming County Airport, PA26 mi22 minN 010.00 miOvercast32°F21°F64%1022.8 hPa

Link to 5 minute data for KIPT

Wind History from IPT (wind in knots)
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2 days agoE7NE7NE5NE5E8NE5E6CalmE5SE5SE4CalmE3SE3CalmCalmCalmCalmCalmCalmW4W3W3W4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 (5,6,7,8)
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Ground Weather Radar Station Binghamton, NY
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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.