Thursday, April25, 2019

Marine Weather and Tides
Woodstock, GA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:53AMSunset 8:18PM Thursday April 25, 2019 12:24 AM EDT (04:24 UTC) Moonrise 12:39AMMoonset 10:52AM 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 Woodstock, GA
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location: 34.03, -84.51     debug

Area Discussion for - Peachtree City, GA
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Fxus62 kffc 250059
area forecast discussion
national weather service peachtree city ga
859 pm edt Wed apr 24 2019

Only some minor trend adjustments to near term with temp dewpt sky
cover given recent obs. Expecting quiet overnight with some
building cirrus given upper moisture advection ahead of amplifying
trough to the west. Previous discussion follows...


Prev discussion issued 807 pm edt Wed apr 24 2019

00z aviation discussion below.

prev discussion... Issued 241 pm edt Wed apr 24 2019
short term tonight through Thursday night ...

models in general agreement with the Thursday night system, however
there are differences in the timing with the GFS begin the faster of
the models. Have gone with a compromise on timing with a slightly
heavier lean on the gfs. High pressure will continue over the cwa
tonight and then shift eastward as the system over the southern
plains moves toward georgia. A piece of energy currently along
the tx la coast moves rapidly northeast and across northwest ga
late tonight. Models are trying to squeeze out some precip.

Atmosphere still quite dry but there could be a sprinkle or light
shower but have added a 20 pop across northwest ga late tonight.

The GFS nam both bring a stronger vort lobe into eastern al western
ga by 00z Friday and several of the hi-res models have picked up on
this bringing scattered showers into the west parts of the cwa
Thursday afternoon. This energy spreads across the CWA Thursday
night and have continue with likely pops. There is enough MLCAPE to
keep a slight chance of thunder going for Thursday afternoon and


Long term Friday through Wednesday
To begin the extended period, an upper level trough and an
associated surface front will be passing eastward through the
southeastern conus. Scattered to numerous showers will be ongoing
ahead of the frontal boundary on Friday morning. Instability
associated with this system is marginal but is still sufficient to
warrant a mention for a slight chance of thunderstorms on Friday.

Model guidance remains somewhat inconsistent with respect to when
the precipitation exits the forecast area on Friday. The latest gfs
solution moves the bulk of the precipitation out by Friday
afternoon, with the exception of some wrap-around across far north
georgia. The latest ECMWF and NAM are still running a little slower,
but nonetheless move showers and thunderstorms out of the area by
Friday night.

High pressure will then build into the area on Saturday behind the
front, leading to clearing skies and drier conditions during the day
Saturday. These dry conditions will be fairly short-lived as weak
cold front moves across the area on Sunday. The majority of the
moisture associated with this system is expected to remain well to
the north of the area, but there will nonetheless be some increased
cloud coverage and a slight chance of showers and thunderstorms
developing along the front. The highest rain chances will are only
expected to be slight pops focused across north georgia late
Saturday night into Sunday.

Long-range models remain inconsistent towards the beginning of next
week. However, an early look indicates that the bermuda high over
the western atlantic could allow for persistent southerly flow to
set up over the area, bringing in warmer than average temperatures
and higher humidity values.


00z update...

vfr conditions and cirrus through much of Thursday, then gradual
decreasing of CIGS ahead of next frontal system. Chance for -shra
and MVFR CIGS increasing from 23-05z Thursday evening and becoming
likely after about 05z Friday. Chance for TS too low to include in
fcst but cannot be ruled out. Winds stay SW thru period -
initially 5-11 kts decreasing light to calm overnight then back
near 10-11 kts with low end gusts for Thursday.

Atl confidence... 00z update...

medium on late period precip and cig timing.

High on all else.


Preliminary point temps pops
Athens 58 82 62 76 5 10 60 60
atlanta 61 80 62 75 5 30 60 50
blairsville 55 76 57 68 10 20 70 70
cartersville 59 80 61 74 5 40 60 50
columbus 59 81 64 78 5 30 60 50
gainesville 60 79 61 73 5 20 70 60
macon 56 81 62 79 5 10 60 60
rome 58 80 60 75 10 50 70 50
peachtree city 57 80 62 76 5 30 60 50
vidalia 60 87 64 81 0 5 60 60

Ffc watches warnings advisories

Short term... 17 baker
long term... .King
aviation... Baker

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cobb County International Airport - McCollum Field, GA5 mi37 minSW 310.00 miFair67°F50°F55%987 hPa
Marietta / Dobbins Air Force Base, GA7 mi29 minN 010.00 miFair67°F48°F52%1013.7 hPa
Atlanta, De Kalb-Peachtree Airport, GA15 mi32 minSW 710.00 miFair67°F50°F55%1013.2 hPa
Fulton County Airport-Brown Field, GA17 mi32 minN 010.00 miFair60°F55°F84%1013.9 hPa
Cartersville Airport, GA19 mi32 minN 010.00 miFair64°F51°F63%1013.5 hPa

Wind History from RYY (wind in knots)
Last 24hrSW3CalmCalmCalmCalmCalmCalmCalmW5NW7NW7W8W8
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmNW3NW7NW10W8W8W8
2 days agoCalmCalmCalmCalmCalmCalmCalm--CalmCalmW3NW8W10W6W8NW6NW5NW5W9W5SW3CalmCalmCalm

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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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.
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Wind Forecast for Peachtree City, GA (0,6,7,8)
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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.