Tuesday, August4, 2020
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Marine Weather and Tides
Farragut, TN

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 6:45AMSunset 8:39PM Tuesday August 4, 2020 9:48 AM EDT (13:48 UTC) Moonrise 8:41PMMoonset 6:31AM Illumination 100% Phase: Full Moon; Moon at 15 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 Farragut, TN
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location: 35.86, -84.15     debug


Area Discussion for - Morristown, TN
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FXUS64 KMRX 041116 AFDMRX

AREA FORECAST DISCUSSION National Weather Service Morristown TN 716 AM EDT Tue Aug 4 2020

UPDATE. FOR 12Z AVIATION.

SHORT TERM (Today and Tonight).

Starting to see some patchy fog this morning, mainly across northeast Tennessee and southwest Virginia. Surface dewpoints are generally in the 60s across the forecast area with temperatures a bit lower than forecast. Current water vapor imagery and RAP upper air analysis indicates the persistent broad trough that stretches from the Great Lakes southward into the Gulf of Mexico. The forecast area is currently in the left entrance region of a 60-80 kt 300 mb jet that extends from the central Appalchians northwards into the New England. Water vapor imagery indicates an impressive dry airmass from the Mississippi River Valley eastward into the Tennessee River Valley. PW values are in the 1.2-1.4 inch range, which are around to slightly below normal for early August. IR satellite imagery indicates mostly clear conditions and expect things will remain dry throughout most of the morning. At the surface, there is a front moving in from the west as Tropical Storm Isaias moves northwards across the Mid-Atlantic. Not seeing a big change in temperatures and dewpoints behind the surface boundary but there appears to be a decent change in PW values.

Fog should lift this morning shortly after sunrise giving way to mostly sunny skies later this morning. A shortwave trough is forecast to round the base of the broader trough over the southern Appalchians later this afternoon. At the same time, the surface front will be moving across the area. PW values are not overly impressive as mentioned earlier. Mid-level lapse rates are also not impressive in the 5.5 C/Km range for most of the area. The NAM is usually aggressive with the SBCAPE values but shows less than 1500 J/Kg for most of the area today. There is some dry air in the mid and upper levels as seen on water vapor imagery that will also hinder convective initiation. However, if a storm did form, there could be some gusty winds brought down to the surface with rather large DCAPE values, thanks to the dry mid and upper levels. Overall, have gone with 30-50 PoPs for most of the area later this afternoon. Expect any ongoing convection will come to an end near sunset as the trough races off to the east and the front exits. Skies should clear as drier air moves in from the west with patchy fog possible again tonight. Overnight lows will generally be in the 60s.

MA

LONG TERM (Wednesday through Monday).

Little change in the long term forecast. A troughing pattern will persist across the region through Thursday. During this time, a few shortwaves will rotate through the trough base and provide focus for showers and storms. The trough lifts off to our northeast on Friday and the flow becomes more zonal. However, another shortwave moves across west TN and into our area allowing more showers and storms. Temperatures will be in the mid to upper 80s on Wednesday and Thursday and begin to warm on Friday as heights begin to rise. Highs on Friday are back to normal with temps in the mid 80s across northeast TN and low 90s southern TN Valley.

No real forcing mechanism in place through the weekend and into Monday. This will allow a return to more terrain-based showers and storms which is typical for this time of year. Highs through the weekend climb above normal with temps in the low 90s for most areas.

SR

AVIATION. 12Z TAF DISCUSSION.

MVFR to IFR conditions to start the day. Fortunately flight conditions are forecast to improve quickly over the next hour or so. Scattered showers and storms will be possible once again this afternoon. A frontal passage is forecast today with drier air moving into the region tonight. Any ongoing convection should come to an end around sunset with the possibility for fog late in the TAF cycle.

MA

MRX WATCHES/WARNINGS/ADVISORIES. NC . NONE. TN . NONE. VA . NONE.


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Knoxville, McGhee Tyson Airport, TN10 mi56 minWSW 510.00 miMostly Cloudy73°F64°F76%1013.8 hPa
Oak Ridge, TN12 mi56 minN 010.00 miOvercast70°F64°F84%1014.4 hPa

Link to 5 minute data for KTYS

Wind History from TYS (wind in knots)
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Last 24hrCalmS3NE5NE3CalmE7E7E6NE6CalmE5N4E3E4NE4NW3SW8SW4SW6SW5SW7SW6SW5W5
1 day agoW8W10W11SW9SW10W8W6W6NW7W7NW3N3N3E3CalmNE3CalmNE3CalmNE3N4N4NE3E6
2 days agoS7S13S15
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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

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Wind Forecast for Morristown, TN (9,2,3,4)
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Ground Weather Radar Station Knoxville/Tri Cities, TN
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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 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.