Monday, January25, 2021
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Marine Weather and Tides
Rest Haven, GA

Version 3.4
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8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:36AMSunset 6:01PM Monday January 25, 2021 6:56 PM EST (23:56 UTC) Moonrise 3:06PMMoonset 5:06AM Illumination 94% Phase: Waxing Gibbous; Moon at 13 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 Rest Haven, GA
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location: 34.18, -84.01     debug


Area Discussion for - Peachtree City, GA
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FXUS62 KFFC 252022 AFDFFC

Area Forecast Discussion National Weather Service Peachtree City GA 322 PM EST Mon Jan 25 2021

. Afternoon Area Forecast Discussion .

SHORT TERM /Tonight through Tuesday Night/.

A warm front sits draped across the forecast area, roughly along the I-20 corridor, which should continue lifting northward throughout the evening impeded only by a weak wedge front tucked closely up against the southeastern aspect of the Blue Ridge mountains. As the warm front lifts, dewpoints will push into the low 60s, below broad WSW flow in the upper-levels and a 50kt jet streak expected at 850mb with veering flow underneath. This added together will allow SRH to surge to 300-400 m2/s2 in the lowest kilometer ahead of a wave of showers that should move into the area overnight ahead of a cold front expected to push into the area on Tuesday.

With as impressive as the dynamics are beginning to look with these weak storms, the thermodynamics are equally abysmal. SBCAPE values look to be below 500 J/kg, with a bit more instability This is expected to be a pretty classic, southeastern High Shear-Low CAPE setup, with a chance for some weak rotating supercells, with an emphasis on weak, tonight into tomorrow morning in North Georgia, with a lot of uncertainty headed into the evening. Ultimately, we could be looking at some isolated damaging winds gusts and a chance for a weak, brief tornado or two if the right ingredients come together.

Tomorrow, the cold front will continue to push into central Georgia with temperatures climbing into the low 70s ahead of it. These temps will generate a bit more instability in the afternoon with weaker dynamics, and thus some weak thunderstorms will be possible again for the late afternoon with an outside chance for isolated damaging winds gusts and a non-zero chance for a brief tornado depending on how far south the front extended by tomorrow afternoon.

Thiem

LONG TERM /Wednesday through Monday/.

Series of disturbances moving across the middle of the country seems to have no end in sight, as the long term will continue to see several chances of rain associated with low pressure systems making there way across the country and pushing fronts through the area. On the hemispheric level, PV anomalies continue to dive into Siberian Russia, leading to strong cyclogenesis over the far western Pacific. These cyclones continue to build and reinforce a mid-Pacific ridge already in place through latent heat processes that allows for shortwaves to dive into the west CONUS, keeping fairly consistent troughing over that region. This allows for these system to eject into the central US and move northeastward, bringing warm gulf air into us ahead of them before pushing a cold front through that typically has cold air that has been able to modify and warm a little compared to its more Arctic origins - the overall net being that we are a bit warmer than average. All of this is consistent with the negative PNA pattern typically associated with La Nina during the winter months, which is currently ongoing and predicted to continue per the CPC.

Wednesday begins with a system having ejected into the southern Greats Plains with sfc low developing near the Gulf coast. This system will take a bit of a more southern track compared to the previous ones as it rides along the stalled frontal boundary expected to be across central GA at the start of Wednesday. Surge of moisture will already be riding up isentropically along the stalled frontal boundary Wednesday morning bringing rain across most of the CWA throughout the day until the upper level system moves by during the evening and drives another surge of the front completely through the area. Winds will shift to the north, and enough low level moisture may remain to squeeze out a few snowflakes across the Appalachians of GA with orographic lift as temperatures drop. Have leaned towards a more NAM like solution, bringing in higher chances of precipitation across all of northern Georgia, as global models can sometimes struggle with coverage of rain in a warm advection scenario like this.

The primary source of uncertainty with this portion of the forecast is where the heaviest rain will fall on Wednesday, as this will be contingent on where exactly the front has stalled. Ensemble guidance shows it being anywhere from just south of the metro to the very edge of the CWA and even a bit further south. Locations along and just behind it will likely experience the heaviest rainfall. At this time, don't anticipate that this will lead to any flooding threats in these locations, though won't completely rule it out as of yet. Locations in central GA will likely experience 1-1.5" of steady rain, with some isolated higher amounts, especially where the aforementioned boundary establishes itself. To the south of and along the boundary, can't rule out an isolated storm or two with unstable airmass that will be in place.

Temperatures on Thursday will be a little cooler than normal in the post frontal airmass with highs in the 40s and low 50s. High pressure at the surface and aloft will begin to build into the area. By Friday, temperatures will quickly begin to recover to normal as our progressive pattern shifts the sfc high to the east and southerly flow quickly returns. Next chance of rain is Saturday into Sunday as yet another system moves across the middle of the country and drives a cold front into the area. Timing differences exist among the models as well as overall differences in the strength of a potential wedge along the Appalachians, which will have large effects on any storm potential with the system over our CWA. Have chosen to continue to leave thunder out of the grids until there is more certainty around the system.

Lusk

AVIATION. 18Z Update . An east-west dividing line is set up around I-20 with IFR/LIFR CIGS/VSBYs north w/ SCT SHRA and SSE winds north of a warm front and MVFR/VFR south with SSW winds south of the front. The front will continue to lift through tonight with incoming -SHRA and ISO TSRA early Tuesday morning. With a few waves of precip, CIGS likely to drop back to IFR/LIFR between 02-06Z for most sites. PROB30 out for ATL sites between 08-12Z for best chance of SHRA/TSRA with SW wind gusts up to 18kts. Improvement expected after 15Z.

//ATL Confidence . 18Z Update . Medium confidence on all elements.

Thiem

PRELIMINARY POINT TEMPS/POPS. Athens 53 71 51 62 / 60 50 70 70 Atlanta 61 69 51 62 / 70 60 70 70 Blairsville 54 63 45 58 / 90 50 50 60 Cartersville 57 68 48 62 / 80 50 60 60 Columbus 65 73 55 67 / 50 50 80 80 Gainesville 49 68 49 61 / 70 50 70 60 Macon 64 74 54 66 / 30 60 80 80 Rome 58 69 47 63 / 80 40 60 50 Peachtree City 62 70 51 64 / 70 60 80 70 Vidalia 63 75 61 68 / 5 60 80 80

FFC WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Thiem LONG TERM . Lusk AVIATION . Thiem


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gainesville, Gilmer Memorial Airport, GA11 mi63 minENE 40.50 miFog50°F48°F93%1012.8 hPa
Gwinnett County Airport-Briscoe Field, GA14 mi60 minNE 45.00 miMostly Cloudy with Haze0°F0°F%1012.9 hPa
Winder, Winder-Barrow Airport, GA23 mi61 minNNE 37.00 miOvercast52°F48°F88%1014.2 hPa

Link to 5 minute data for KGVL

Wind History from GVL (wind in knots)
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Last 24hrE5E4E4SE4E3NE4NE3N4NE3E5E5E4E5E5E5E4E5NE3NE3E3CalmCalmE5NE4
1 day agoSE4SE5SE5SE4E4E4E5E6E9E9E5E7E6E5E11E11E8E7SE4E7E6SE4SE5SE3
2 days agoNW9NW6W5W5W6W5NW6W7W6W5W5W6W5W3N5CalmE5CalmCalmSE4Calm5E4SE4

Tide / Current Tables for
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