Hiawassee, GA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Hiawassee, GA

June 20, 2024 3:43 PM EDT (19:43 UTC) Change Location
Sunrise 6:22 AM   Sunset 8:51 PM
Moonrise 7:03 PM   Moonset 3:44 AM 
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7 Day Forecast for Marine Location Near Hiawassee, GA
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Area Discussion for - Peachtree City, GA
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Area Forecast Discussion National Weather Service Peachtree City GA 233 PM EDT Thu Jun 20 2024

Afternoon Area Forecast Discussion

(This afternoon through Friday)
Issued at 228 PM EDT Thu Jun 20 2024

Key Messages:

- Dry conditions will prevail for the rest of today and tonight.

- Isolated thunderstorms will be possible across east-central Georgia tomorrow (Friday) afternoon.

500 mb analysis depicts an upper-level ridge and high pressure extending from the Eastern Seaboard to the Mississippi River Valley.
The 12z sounding shows very dry air above ~850 mb and SPC mesoanalysis depicts PWAT of 1.0" to 1.2". A Cu field envelopes much of the area, but lack of appreciable moisture and abysmal instability mean that convection is not expected, which makes sense as Day Cloud Phase RGB satellite imagery reveals that no cloud tops are tall enough to glaciate. The mostly to partly sunny sky will allow insolation to drive temperatures into the lower 90s across much of the area.

The ridge is expected to retrograde tonight into tomorrow (Friday)
while what is currently Disturbance 1 just northeast of the Bahamas is steered west-northwestward by the flow around the ridge. The NHC currently has a 40% chance of tropical development in the next 48 hours. Regardless of its tropical nomenclature, this feature will bring with it an influx of moisture (characterized by PWAT greater than 1.5" across portions of central Georgia) as it tracks inland over the Georgia and Florida coasts tonight into tomorrow. The tropical moisture and HRRR-progged MUCAPE up to ~1000 J/kg across east-central Georgia suggest the potential for isolated showers and thunderstorms tomorrow afternoon. The SPC has a General Thunder risk for this area, which makes sense, as a lack of 0-6 km bulk shear and marginal instability suggest that the potential for strong/severe storms is relatively low. Forecasted rainfall totals are not much to talk about -- anywhere from a trace to around 0.10".


(Saturday morning through next Wednesday)
Issued at 228 PM EDT Thu Jun 20 2024

Broad subtropical high will be in place across much of the southern US to start the long term. Steering flow closer to the surface will have pushed a tropical wave onshore Friday that should somewhere near the FL/GA border starting Saturday. This feature will have brought a good slug of moisture into the area and frictional convergence around the system should provide for some rain and thunderstorm development Saturday. Best chances will be down in central GA, but could see some rain and storms pop up across much of the CWA This moisture remains in place into Sunday, allowing for diurnally driven summer storms.

On Monday, models show upper level low swinging across NE CONUS.
This will drive a cold front toward the CWA, but it should lose much of its momentum before arriving. Still, it may move through the area on Monday, allowing for some enhancement of afternoon showers and thunderstorms out ahead of it as moisture pools up a bit. Model uncertainty expands a bit after this point, with position and depth of the next trough across the northeast showing some meaningful differences in the model ensembles. What is consistent is that we will likely have plenty of moisture in place and a thermal environment favorable for diurnally driven thunderstorm development most days into the end of the week.

The potential bigger weather headline in all of this will be the heat. NBM is showing temperatures in the mid to upper 90s, including even a few triple digits, Sunday through Wednesday. Overnight lows also would not provide for much relief falling into the low to mid 70s. Unlike our previous spell of heat, moisture looks to be a bit more present, so heat indices creep up into the triple digits again and heat products may be warranted. However. There is some uncertainty around afternoon temperatures, especially given the chances for diurnal convection. One bias we have noted in the longer term guidance during our diurnal convection season is for the blend to give an actual high that is a bit too high, as we reach convective temperature and produce rain and cloud cover across much of the area well before those highs can be realized.
You can see a reflection of this within the NBM percentiles, where the NBM 90th and 10th percentile spread is 10 degrees or more at many point locations, representative of models which are convecting and cooling. The forecast will continue to reflect the higher end heat chances, and once we have a better handle on what type of coverage we may have on afternoon convection via short term guidance, more concrete decisions can be made around heat related products.


(18Z TAFS)
Issued at 122 PM EDT Thu Jun 20 2024

VFR conditions are expected at all TAF sites through the period.
The Cu field (045-065) will persist until early evening. Easterly winds will stay breezy around 10-15 kts with gusts of 20-25 kts, then decrease to around 5 kts or lower overnight. Winds will pick back up mid/late tomorrow (Friday) morning out of the ENE to E at 7-12 kts with gusts around 20 kts possible. FEW/SCT clouds around 050-060 are expected tomorrow afternoon.

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


Athens 65 93 69 93 / 0 0 0 20 Atlanta 69 94 72 95 / 0 0 0 10 Blairsville 63 87 65 89 / 0 10 0 20 Cartersville 67 94 69 95 / 0 0 0 10 Columbus 69 95 73 95 / 0 0 10 30 Gainesville 67 91 70 92 / 0 0 0 10 Macon 66 94 71 95 / 0 10 10 40 Rome 69 95 70 95 / 0 0 0 10 Peachtree City 66 94 69 95 / 0 0 0 20 Vidalia 68 92 73 92 / 10 50 20 70


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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KDZJ BLAIRSVILLE,GA 16 sm28 minSSE 0710 smPartly Cloudy82°F63°F51%30.35
KRHP WESTERN CAROLINA RGNL,NC 21 sm14 minW 0410 smPartly Cloudy88°F64°F46%30.32
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