Louisville, TN Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Louisville, TN

April 23, 2024 1:37 PM EDT (17:37 UTC) Change Location
Sunrise 6:50 AM   Sunset 8:17 PM
Moonrise 7:17 PM   Moonset 5:35 AM 
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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.

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7 Day Forecast for Marine Location Near Louisville, TN
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Area Discussion for - Morristown, TN
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FXUS64 KMRX 231708 AFDMRX

Area Forecast Discussion National Weather Service Morristown TN 108 PM EDT Tue Apr 23 2024

New AVIATION

UPDATE
Issued at 828 AM EDT Tue Apr 23 2024

No significant changes were made to the forecast for today. Today will be dry, breezy and warmer. Southwesterly winds will gust up to 25 mph this afternoon in the Tennessee Valley. With a dry air mass in place and clear skies bringing good mixing conditions, relative humidity values may get into the 20 percent range this afternoon despite WAA. The good news is that fuel moisture levels are likely high enough to keep fire danger limited.

SHORT TERM
(Today and tonight)
Issued at 256 AM EDT Tue Apr 23 2024

Key Messages:

1. Frost Advisory remains in effect until 9AM ET. See product for additional details.

2. Dry and breezy this afternoon.

3. Increasing chances of rain overnight into the first half of Wednesday. Only light rain is expected before becoming mostly dry for Wednesday afternoon/evening.

Discussion:

A surface cold front has led to scattered radar returns across portions of the midwest and into the Great Lakes region. This has resulted in some minor high clouds advecting across the area.
Additionally, most recent surface observations have a wide range of dewpoints from lower 40s to upper 20s, along with a few places holding onto a light(3-5kt) wind. A Frost Advisory remains in effect until 9AM EDT as patchy frost is possible, primarily in sheltered valleys where there is a lower likelihood of aforementioned light winds/clouds weakening favorable radiational cooling.

Tuesday afternoon will be dry as high pressure remains in control ahead of the aforementioned approaching surface boundary. A tightening pressure gradient and favorable mixing will result in low relative humidities and breezy southwest winds throughout the afternoon hours. Have continued to headline this in the FWF.

An upper level shortwave will drive the cold front into the region overnight Tuesday, with rather light precipitation of a tenth of an inch or less expected for most. Locally higher totals will be possible within the East Tennessee mountains where orographic lift helps squeeze out as much moisture as possible. The best chances for rain exist in the northern half of the area during this Tuesday night through early Wednesday timeframe. Rain chances gradually come to an end around mid-day Wednesday, as most places should remain dry for the afternoon and evening.

LONG TERM
(Wednesday through Monday)
Issued at 256 AM EDT Tue Apr 23 2024

Key Messages:

1. Overall, mostly dry extended forecast into the weekend.

2. A warm-up with temperatures becoming above normal with breezy conditions late week and into the weekend.

3. A chance of showers and thunderstorms return early next week.

Discussion:

Overall, the extended will be dominated by upper and surface ridging into the southern Appalachians and southeast United States. Ridging will block upper forcing well west and northwest of the area and limit deep moisture and instability return into the southern Appalachians. Best chance of showers and increased moisture/instability return early next week.

For Wednesday night through Thursday night, building upper ridge and surface ridging across the southern Appalachians into southeast United States will produce dry and warm conditions.

For Friday, an upper jet moves northeast across the mid-section of the nation strengthening the low-level jet over the western Ohio and Tennessee valleys. The deterministic models, especially the GFS, suggests an area of isentropic forced scattered showers will lift north over the area. However, the ensemble probabilities from the NBM depict meager chances (10 to 30 percent) at most. This seems reasonable given the continued surface ridging into the southeast/eastern Gulf coast states limited moisture return.

For Saturday and Sunday, ridging surface and aloft builds into the southern Appalachians producing unseasonably warm and dry conditions. There may be a few showers develop across the higher elevations due to orographic lift but overall dry. Temperatures will be some 5 to 10 degrees above normal.

For Monday, another jet moves from the mid-section of the nation into the Great Lakes/Ohio valley. In response, a frontal boundary moves into the Tennessee valley. NBM ensemble probabilities are more aggressive with chances of measurable rainfall as well as higher SBCAPE. Chance of showers and thunderstorms will return for early next week.

AVIATION
(18Z TAFS)
Issued at 102 PM EDT Tue Apr 23 2024

Southwesterly winds will be breezy this afternoon with gusts up to 20 to 25 knots likely. A weak cold front will approach the region tonight bringing low clouds late tonight and into the morning hours. CIGs may go MVFR briefly in the morning hours, otherwise VFR conditions will prevail. Light rain will also be possible especially near TRI. By mid to late morning the cold front will move through and clouds/rain will move out of the region.

PRELIMINARY POINT TEMPS/POPS
Chattanooga Airport, TN 54 76 50 77 / 10 10 0 10 Knoxville McGhee Tyson Airport, TN 55 72 47 75 / 30 30 0 10 Oak Ridge, TN 54 74 47 76 / 40 30 0 10 Tri Cities Airport, TN 50 68 42 71 / 40 40 0 0

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




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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KTYS MC GHEE TYSON,TN 3 sm44 minSW 1510 smOvercast66°F36°F32%30.16
KDKX KNOXVILLE DOWNTOWN ISLAND,TN 14 sm22 minSSW 10G1910 smClear68°F34°F28%30.15
Link to 5 minute data for KTYS


Wind History from TYS
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Knoxville/Tri Cities, TN,



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