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 6:41AM||Sunset 8:38PM||Thursday July 29, 2021 11:38 AM EDT (15:38 UTC)||Moonrise 11:15PM||Moonset 11:14AM||Illumination 72%|
7 Day Forecast for Marine Location Near Athens-Clarke County, GAHourly EDIT Help
Area Discussion for - Peachtree City, GA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS62 KFFC 291146 AFDFFC
Area Forecast Discussion National Weather Service Peachtree City GA 746 AM EDT Thu Jul 29 2021
. 12Z Aviation Area Forecast Discussion .
PREV DISCUSSION. /Issued 503 AM EDT Thu Jul 29 2021/
SHORT TERM /Today through Friday/ . Main forecast concern in the short term period remains extreme heat.
Overnight guidance still indicates that upper ridge will build in with sufficient heat and low level moisture to approach or exceed heat advisory threshold of 105. Yesterday's forecast dewpoints were underforecast by 3-5 degrees especially over middle GA so anticipate similar bias in today's forecast. With this in mind, have issued advisory for many areas including Atlanta metro, basically all of CWA except for far north and eastern counties.
Pattern continues for Friday so unless significant drying and/or vertical mixing occurs during the afternoon, will likely approach or exceed criteria again. Winds at surface and lowest 5000ft light to nearly calm so less opportunity for deep mixing. Not seeing heat watch/warning criteria (> 110) being met so no watch planned at this time for Friday.
As far as clouds and precip should be mostly sunny with perhaps very isolated SHRA/TSRA over far southern zones. Currently have PoPs below 15 percent there so no mention in official forecast. Westerlies around periphery of upper trough begin to dip south into ern TN/wrn SC/NC on Friday so could see some isold/sct storms move into north GA Fri afternoon and evening, perhaps making it as far south as ATL metro. Not seeing any threat for significant severe or flooding at this time.
LONG TERM /Friday Night through Wednesday/ . By Saturday afternoon the upper level high to our west will stretch from the PACNW SE to FL. Our weather will be dominated by the large scale subsidence forcing beneath the high. As a result little cloud coverage and convection is expected with afternoon highs peaking in the mid 90s to low 100s. In addition dewpoints are anticipated to range from the 60s to 70s. These factors combined will result in heat indices of 105F to 110F with the highest indices expected over the southeastern portions of the CWA. Heat headlines will likely be needed for the aforementioned area.
Sunday the pattern aloft begins to change as the upper level high contracts and shifts westward and a trough aloft digs across the eastern CONUS sending an attendant surface front through the CWA early Sunday evening. Ahead of the front Sunday afternoon will once again be hot and humid (with the possibility of more heat headlines). The full "impacts' of the front will finally be felt and seen Sunday night into Monday in the form of increased precip chances area wide and decreased afternoon high temperatures.
The front will linger across central Georgia through mid week with drier and cooler air advecting into the northern portions of the CWA and afternoon convection occurring across the southern portions near and along the stalled front.
AVIATION. 12Z Update . VFR conditions with no SHRA/TSRA expected thru the fcst period. Sfc winds WNW 4-6 kts today then light/variable after 00Z and WNW 6-9kts after 15Z Fri.
//ATL Confidence . 12Z Update . High confidence on all elements.
PRELIMINARY POINT TEMPS/POPS. Athens 98 75 98 75 / 5 5 20 0 Atlanta 98 76 98 76 / 5 0 20 5 Blairsville 93 69 90 67 / 5 5 30 0 Cartersville 99 73 98 72 / 0 0 20 0 Columbus 99 76 100 77 / 10 5 10 5 Gainesville 96 75 96 74 / 0 5 20 0 Macon 99 74 100 76 / 5 5 10 5 Rome 100 74 98 73 / 0 0 30 0 Peachtree City 98 74 98 75 / 5 0 20 5 Vidalia 95 76 98 78 / 10 5 10 5
FFC WATCHES/WARNINGS/ADVISORIES. Heat Advisory from noon today to 8 PM EDT this evening for the following zones: Baldwin . Barrow . Bartow . Bibb . Bleckley . Butts . Carroll . Chattahoochee . Chattooga . Cherokee . Clarke . Clayton . Cobb . Coweta . Crawford . Crisp . DeKalb . Dodge . Dooly . Douglas . Fayette . Floyd . Forsyth . Gordon . Greene . Gwinnett . Hall . Hancock . Haralson . Harris . Heard . Henry . Houston . Jackson . Jasper . Johnson . Jones . Lamar . Laurens . Macon . Marion . Meriwether . Monroe . Montgomery . Morgan . Muscogee . Newton . North Fulton . Oconee . Paulding . Peach . Pike . Polk . Pulaski . Putnam . Rockdale . Schley . South Fulton . Spalding . Stewart . Sumter . Talbot . Taylor . Telfair . Treutlen . Troup . Twiggs . Upson . Walton . Washington . Webster . Wheeler . Wilcox . Wilkinson.
SHORT TERM . SNELSON LONG TERM . 28 AVIATION . SNELSON
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
On 03/09/2021 the NDBC primary processing servers were shut off due to a facilities issue. Station pages on the NDBC website are not updating and there is no ETR at this time. We will update this banner as we learn more.
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CHDS1 - Strom Thurmond Dam, SC||61 mi||78 min||Calm G 2.9|
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Athens, Athens Airport, GA||4 mi||47 min||Var 4||10.00 mi||Fair||90°F||76°F||63%||1017.9 hPa|
|Winder, Winder-Barrow Airport, GA||20 mi||43 min||SSW 3||10.00 mi||Fair||86°F||73°F||66%||1019.6 hPa|
|Greensboro, Greene County Regional Airport, GA||23 mi||43 min||N 0||10.00 mi||Fair||86°F||73°F||66%||1018.3 hPa|
Link to 5 minute data for KAHN
Wind History from AHN (wind in knots)
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|2 days ago||Calm||Calm||E||E||E||NE||E||E||Calm||NW||NW||Calm||Calm||E||E||E||E||Calm||Calm||NE |
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