Marine Weather and Tides
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 7:26AM||Sunset 7:26PM||Monday September 27, 2021 3:44 AM EDT (07:44 UTC)||Moonrise 10:26PM||Moonset 12:42PM||Illumination 67%|
7 Day Forecast for Marine Location Near Knoxville, TNHourly EDIT Help
Area Discussion for - Morristown, TN  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KMRX 270723 AFDMRX
AREA FORECAST DISCUSSION National Weather Service Morristown TN 323 AM EDT Mon Sep 27 2021
SHORT TERM. (Today and Tonight) .
1. Mostly clear and dry today with beautiful weather.
WV imagery and observations show longwave troughing across the Eastern CONUS with an upper ridge extending from TX through the Central Plains. Surface high pressure is centered across the Southeast CONUS with mid-level ridging across the lower Mississippi Valley. This is resulting in subsidence and very dry air as shown in mid-level WV imagery this morning. With the surface ridge shifting east of the area today, weak boundary layer SW flow will resulting in some weak WAA and increasing moisture across the region. Afternoon max temperatures will be about 5 to 7 deg F above seasonal normals.
High pressure will result in continued mostly clear sky tonight with light to calm winds. A weak shortwave moving southeast across the Great Lakes and Central Appalachians will result in some scattered mid to high clouds across SW VA and NE TN tonight, but our weather is forecast to remain dry.
LONG TERM. (Tuesday through Sunday) .
1. Dry weather and above normal temperatures expected for much of the long term forecast
2. An increasing chance for some light precipitation at the end of the forecast.
Surface high pressure and ridging aloft will bring warmer than average temperatures and no precipitation for the remainder of the week. Temperatures will be in the lower to mid 80s during the day and 50s to lower 60s in the morning. The building ridge over the center part of the country becomes strongest over the forecast area Wednesday and Thursday. An upper trough over northeastern Canada early in the extended becomes cutoff and drifts south and settles over the northeast US states. This will hold the ridging in place over the Tennessee Valley through the end of the week. Eventually lower pressure over the south central states develops ahead of a trough developing over the Rocky Mountains late in the week. This system will move into the lower Mississippi Valley late in the weekend as ridging breaks down over the southeast. The GFS is about a day faster with the system then the ECMWF and with southwest flow developing ahead of it a few showers could develop by Sunday afternoon and evening so have slight chance of rain showers late. If the ECMWF is more accurate the precipitation may hold off until Monday. Temperatures should cool a few degrees on the weekend with more cloud cover ahead of the weekend system and slowly weakening upper level ridge.
AVIATION. 06Z TAF DISCUSSION.
Backed off on fog formation this morning with higher dew point depressions at TAF site obs than last night. Still expect some shallow fog at TAF sites, so mentioned this in TAF. There is a low chance of IFR/LIFR vis with fog in the vicinity of terminals, but based on current obs and newer forecast guidance, kept VFR conditions through the entire period. Localized fog clears out by 13-14z this morning with a clear sky and light SW winds between 5 to 10 kts.
PRELIMINARY POINT TEMPS/POPS. Chattanooga Airport, TN 83 59 83 60 85 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 81 59 82 60 84 / 0 0 0 0 0 Oak Ridge, TN 81 57 83 60 84 / 0 0 0 0 0 Tri Cities Airport, TN 79 55 80 57 81 / 0 0 10 0 0
MRX WATCHES/WARNINGS/ADVISORIES. NC . NONE. TN . NONE. VA . NONE.
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|Knoxville, McGhee Tyson Airport, TN||11 mi||51 min||NE 3||10.00 mi||Fair||56°F||53°F||90%||1019.8 hPa|
Link to 5 minute data for KTYS
Wind History from TYS (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||SW||SW||S||SW||Calm||Calm||W||W||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
|2 days ago||Calm||Calm||NE||N||NE||Calm||E||Calm||NE|
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