Saturday, November28, 2020
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Marine Weather and Tides
Acworth, GA

Version 3.4
NOTICE
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 7:22AMSunset 5:31PM Saturday November 28, 2020 12:06 AM EST (05:06 UTC) Moonrise 4:39PMMoonset 5:39AM Illumination 96% 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 Acworth, GA
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location: 34.1, -84.62     debug


Area Discussion for - Peachtree City, GA
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FXUS62 KFFC 272331 AFDFFC

Area Forecast Discussion National Weather Service Peachtree City GA 631 PM EST Fri Nov 27 2020


UPDATE. Stationary frontal boundary remains across the southern CWA this evening. The front should begin to move north overnight as a warm front. Regional radar shows an area of showers and a few thunderstorms across central AL, moving east. This area of rainfall will push east across the CWA overnight. Have tweaked the pops a bit ahead of the precip. Have also tweaked the hourly temps/dewpoints.

PREV DISCUSSION. /Issued 227 PM EST Fri Nov 27 2020/

SHORT TERM /Tonight through Saturday Night/ . No significant weather impacts expected in the short term period. Main forecast concern is timing of onset of light rain associated with positively tilted short wave currently over the Midwest states. Stationary front associated with previous wave never really pushed as far south as models indicated and currently lying just south of CWA and extending WNW toward western AL. Low clouds already sneaked back into Columbus when all recent guidance indicated they should have been clear all afternoon. Will need to watch this trend as PoPs and clouds may move in faster than forecast this evening. 12Z EC and EC MOS also indicating higher PoPs for tonight so may bump them up a bit more before finishing the shift. No matter the timing still appears that rainfall will be fairly light with total amounts under 0.10 inches in north GA and 0.25-0.50 inches in middle GA. Could see some embedded TSRA but no strong/severe convection expected.

Next round of SHRA/TSRA won't arrive until Sunday with clearing skies from the north Saturday afternoon.

SNELSON

LONG TERM /Sunday through Friday/ . The beginning of the forecast period Sunday will be very active as a closed upper low over the Southern Plains transitions into an open wave as it becomes absorbed into the northern jet stream. As this occurs, a surface low will deepen as it tracks from the Mississippi Valley into the Tennessee Valley by Sunday evening. Widespread rainfall will thus be on the increase from west to east during the day Monday as isentropic lift initially increases as a warm front lifts northward. While some elevated embedded thunderstorm activity is possible through the day Sunday, the risk for any strong or isolated severe thunderstorms will be along and south of the warm front late Sunday evening into Sunday night. Even in these areas, forecast instability appears rather marginal, though plenty of shear will spread across the area. In this low CAPE/high shear environment, the potential for an isolated damaging wind or tornado threat is there, primarily in Middle Georgia Sunday night. Otherwise, healthy rainfall totals can be expected with widespread 1- 2" totals from Sunday into Monday morning with locally higher amounts.

By Monday morning, the strong surface cold front will sweep into the area, rapidly ushering in much colder temperatures for Monday. The dry slot behind the front will bring an initial quick end to the rain. However, the next situation to monitor will be the potential for any wraparound light wintry precipitation Monday evening into Monday night in north Georgia. Rapid cold air advection will bring 850 mb temperatures into the -8 to -10 degree C range by Monday evening, so any lingering light wraparound moisture would be in the form of light snow. At this point, moisture appears quite limited as the cold and drier air rushes in. However, some very light accumulations likely under an inch are possible, primarily in the high elevations of the north Georgia mountains before this narrow window closes.

Tuesday morning will bring the coldest temperatures of the season so far with a widespread hard freeze in north Georgia with low temperatures in the mid-20s. Even central Georgia will experience lows in the upper 20s to lower 30s. This will (finally) bring the first official freeze of the season to the Atlanta and Columbus climate sites. High temperatures Sunday will struggle to crack 40 degrees in north Georgia with mid-to-upper 40s in central Georgia. Dry conditions will persist through Wednesday as high pressure settles overhead with another hard freeze areawide Wednesday morning. Confidence then remains low by the end of the forecast period as the ECMWF indicates a second approaching strong low pressure system by late Thursday into Friday while the GFS remains weaker. At this point will indicate increasing low-end PoPs at the tail end of the forecast.

RW

AVIATION. 00Z Update . A period of MVFR cigs possible as an area of precipitation moves across metro ATL overnight. IFR cigs briefly possible at CSG/MCN. Light and variable winds expected for much of the overnight, but should pick up out of the NW during the day tomorrow. A wind shift back to the east is possible during the mid evening on Saturday.

//ATL Confidence . 00Z Update . Med confidence all elements. NListemaa

PRELIMINARY POINT TEMPS/POPS. Athens 52 67 48 59 / 40 20 5 90 Atlanta 53 66 49 57 / 40 20 10 90 Blairsville 46 62 42 54 / 30 10 0 90 Cartersville 50 66 45 59 / 40 20 10 90 Columbus 59 70 54 63 / 80 50 30 100 Gainesville 53 67 48 56 / 30 20 5 90 Macon 56 70 51 63 / 70 60 20 90 Rome 50 65 44 61 / 40 20 10 90 Peachtree City 53 67 48 60 / 50 30 20 90 Vidalia 58 67 55 67 / 60 70 10 70

FFC WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . NListemaa LONG TERM . RW AVIATION . NListemaa


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cobb County International Airport - McCollum Field, GA6 mi76 minN 010.00 miOvercast56°F48°F77%990.5 hPa
Cartersville Airport, GA12 mi73 minN 010.00 miOvercast56°F51°F84%1017.8 hPa
Marietta / Dobbins Air Force Base, GA13 mi2.2 hrsN 010.00 miOvercast55°F48°F79%1017.5 hPa
Dallas Paulding County Regional Airport, GA22 mi71 minWSW 310.00 miOvercast59°F42°F55%1018.3 hPa
Fulton County Airport-Brown Field, GA23 mi73 minN 010.00 miOvercast57°F48°F74%1017.5 hPa
Atlanta, De Kalb-Peachtree Airport, GA23 mi73 minN 010.00 miPartly Cloudy55°F48°F77%1017.6 hPa

Link to 5 minute data for KRYY

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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmW43NW43W4CalmNW3NW3CalmCalmCalmCalmCalmCalmCalm
1 day agoSW8
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5SW5CalmW3W3CalmNW4SW3SW5SW7SW54Calm----NW4CalmCalmCalmCalmCalmCalmCalm
2 days agoE10
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W55SE6S64Calm43S8

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Atlanta, GA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.