Wednesday, August21, 2019

Marine Weather and Tides
Acworth, GA

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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 7:03AMSunset 8:20PM Wednesday August 21, 2019 3:18 AM EDT (07:18 UTC) Moonrise 10:52PMMoonset 11:25AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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 210538
area forecast discussion
national weather service peachtree city ga
138 am edt Wed aug 21 2019

Updated for the 06z aviation discussion.

Prev discussion issued 840 pm edt Tue aug 20 2019

made a few minor adjustments, mainly to hourly temperatures dew
points pops through the overnight period. Have seen a bit less
convective coverage across the area this afternoon into the early
evening than expected, but still have some potential for isolated to
scattered showers and thunderstorms. With the afternoon heating well
past its peak, chances will continue to diminish through the
overnight period. More organized convection to the north has been
diminishing as it moves south, but does merit slightly higher pops
lingering through the early morning hours across the far north.

Otherwise, no significant changes made to the short-term forecast at
this time.

prev discussion... Issued 800 pm edt Tue aug 20 2019

00z aviation forecast discussion
Short term tonight through Wednesday night ...

widespread severe weather is not expected today, but marginally
strong to a few severe storms are possible today as diurnally-driven
convection fires. Weak upper level trough remains situated over the
area, and the surface low feature will continue to provide a focus
for storm development. This low will move northeastward over the
carolinas into Wednesday, with drier westerly flow setting up behind

Models continue to show highest storm chances over the southern and
eastern portions of the cwa, with gusty winds and frequent lightning
as main concerns. Additionally, with high precipitable water values,
brief heavy downpours can be expected with the strong or slow-moving
storms, and a quickly accumulating 1-2 inches or more are possible.

Rain chances are not quite as high Wednesday with the absence of
better moisture, but have continued to forecast good chance
thunderstorms for the peak heating period.

High temperatures Wednesday are slightly higher than today, with
most of the area back in the 90s. Heat index values will largely be
under 100, with a few patchy areas just above 100.

long term Thursday through Tuesday ...

only tweaks to the long term based on the latest guidance.

previous discussion...

afternoon and evening scattered to numerous showers and
thunderstorms will continue through the extended periods of the
forecast. The area will remain situated in the weak upper trough
between the ridge over the plains and western atlantic ridge.

Moisture continues to slowly increase across the area through the
end of the week which will will provide a boost each afternoon for
convective development. By the end of the week, the models are
showing a cold front pushing south out of the great lake state
Thursday and into north ga Friday. The models show this frontal
boundary stalling across the southeastern u.S. And keeping rain
chances across the region through the end of the forecast period.

By Sat Sun a wedge of high pressure builds down the eastern
seaboard and keeps things rainy and cool for this time of year.

Looking at temps in the 70s and 80s across north and central ga.


06z update...

mainlyVFR conditions are expected across the forecast area
through the period, with the exception of some patchy MVFR
visibility restrictions near mcn csg ahn between 09-14z. Some
scattered low-level clouds at 020-030 are also possible during
that time. Scattered convection is expected once again area- wide
during the afternoon after 18z, with sufficient coverage to
warrant a prob30 for tsra from 19-24z. SW to W winds through the
period will be generally less than 5 kts this morning, then will
increase to 5-10 kts by 18z.

Atl confidence... 06z update...

medium confidence on the development of scattered low clouds.

High confidence on all other elements.


Preliminary point temps pops
Athens 91 71 91 71 50 40 40 30
atlanta 91 73 90 72 40 30 50 30
blairsville 83 66 83 65 50 40 60 50
cartersville 92 71 92 71 50 40 60 40
columbus 93 73 92 73 40 30 50 20
gainesville 89 71 89 71 50 40 60 40
macon 92 72 93 72 40 30 40 30
rome 92 72 92 72 50 30 60 40
peachtree city 93 72 92 72 40 30 50 30
vidalia 92 73 93 72 40 30 30 20

Ffc watches warnings advisories

Short term... King
long term... .41
aviation... King

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cobb County International Airport - McCollum Field, GA6 mi28 minS 310.00 miFair74°F69°F85%991.9 hPa
Cartersville Airport, GA12 mi25 minS 410.00 miFair74°F70°F88%1017.7 hPa
Marietta / Dobbins Air Force Base, GA13 mi22 minSW 510.00 miFair73°F69°F87%1018.6 hPa
Dallas Paulding County Regional Airport, GA22 mi23 minN 010.00 miFair70°F69°F100%1020 hPa
Fulton County Airport-Brown Field, GA23 mi25 minSSW 310.00 miFair74°F69°F85%1018.2 hPa
Atlanta, De Kalb-Peachtree Airport, GA23 mi25 minWSW 610.00 miFair73°F69°F87%1017.5 hPa

Link to 5 minute data for KRYY

Wind History from RYY (wind in knots)
Last 24hrE5----------------E3CalmE3E5S3SE6SE4NE5SE6W3E3SE4SE6S4Calm
1 day agoSE4Calm----Calm--CalmCalmCalmCalmCalmCalmCalmCalmCalm4CalmSE7--E5E8E6NE5--
2 days agoCalmCalmCalmCalmCalmN3CalmS4CalmCalmCalm--CalmCalmCalmCalmW73NW4E44E7SE4S6

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of Southeast    EDIT
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

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Wind Forecast for Peachtree City, GA (3,6,7,8)
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Ground Weather Radar Station Atlanta, GA
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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 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 numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at 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.