Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Atlanta, 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 7:32AMSunset 5:31PM Thursday December 13, 2018 3:31 PM EST (20:31 UTC) Moonrise 12:07PMMoonset 11:16PM Illumination 37% Phase: Waxing Crescent; Moon at 6 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
    EDIT      (on/off)   Help


7 Day Forecast for Marine Location Near Atlanta, GA
   Hourly   EDIT   Help
location: 33.76, -84.42     debug


Area Discussion for - Peachtree City, GA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kffc 131931
afdffc
area forecast discussion
national weather service peachtree city ga
231 pm est Thu dec 13 2018

Short term tonight through Friday night
Current satellite loop shows increasing mid to high
clouds across the area with the next frontal system still developing
across the southern plains and lower ms river valley. Ahead of this
frontal system... Southwesterly diffluent upper flow is developing
across the state as the closed upper low continues to dig into the
southern plains. This strengthening low moves into the ms river
valley Friday then pushes NE into the southern great lake states
Saturday. This lows associated cold front begins to push precip into
ga this evening with showers continuing through the short term.

There will be some marginal instability especially across
southeastern portions of the CWA for at least the mention of
isolated thunderstorms Friday. Not expecting much in the way of
severe storms but can not rule out a strong storm or two developing
Friday afternoon evening. Latest QPF totals through the day Saturday
are still down a bit from what we were seeing yesterday, and overall
threat for additional flooding is still lower. It looks like the 2
day totals are in the 1 to 1.50 inch range across the state with the
highest totals across central and southern ga. Soils are still very
wet and streamflows are still elevated ahead of this system so any
increase in QPF will need to be monitored closely.

01

Long term Saturday through Thursday
Minor adjustments made to some shower pop trends with departing
short term system as the occluded front pushes east for Saturday
and some lingering moisture near the main lobe of the upper trough
still allows for some shower chances Saturday night. Sunday still
looks dry with improving conditions and scattering out of clouds,
then a mainly dry first half of the work week. Euro continues to
have trough wetter solution for after mid week (mainly thurs),
while GFS is drier. Included just slight pops for Thursday
accordingly until more consensus is reached. Previous discussion
follows.

Baker
prev discussion... Issued 620 am est Thu dec 13 2018
long term Friday night through Wednesday ...

the long term begins with the above mention storm system
continuing across the cwa. Models in better agreement with timing
and location of deepest moisture and instability. Have continued
with slight chance of thunder into Friday night as there remains
some instability across the cwa. This system finally pulls out by
Sunday leaving the rest of the long term mostly dry. Toward the
end of the long term models differ considerably as the ecmwf
develops an elongated trough over the mississippi valley spreading
moisture into the CWA by Wednesday night, and the GFS developing
a closed low over northern mexico leaving the CWA dry. Will
continue with a dry forecast for now at the end of the long term.

17

Aviation
18z update...

vfr conditions to start this TAF set but things will diminish
into the MVFR and ifr range through this period. Precip will move
into the area tonight after 00z and continue through the taf
period. Will see some isolated thunderstorms across the state but
thinking they will be too isolated to mention in the forecast.

Ceilings and vsbys will drop out of theVFR range overnight as the
precip moves in and stay in the MVFR to ifr range through the end
of the period. Winds will stay out of the east in the 6-12kt
range.

Atl confidence... 18z update...

confidence medium to high on all elements.

01

Preliminary point temps pops
Athens 44 51 47 57 100 100 70 40
atlanta 46 55 48 55 100 100 60 40
blairsville 40 51 45 52 100 100 70 60
cartersville 45 54 47 53 100 100 60 50
columbus 52 64 51 58 100 100 50 30
gainesville 43 49 46 54 100 100 70 50
macon 50 63 53 61 100 100 60 30
rome 46 55 48 53 100 100 70 50
peachtree city 47 57 48 56 100 100 60 40
vidalia 54 66 56 65 100 100 70 30

Ffc watches warnings advisories
None.

Short term... 01
long term... .17 baker
aviation... 01


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fulton County Airport-Brown Field, GA5 mi39 minE 610.00 miFair54°F33°F45%1020.7 hPa
Atlanta, Hartsfield - Jackson Atlanta International Airport, GA7 mi40 minE 710.00 miMostly Cloudy52°F35°F53%1021.3 hPa
Atlanta, De Kalb-Peachtree Airport, GA10 mi39 minENE 48.00 miPartly Cloudy51°F32°F48%1021.8 hPa
Marietta / Dobbins Air Force Base, GA13 mi36 minE 510.00 miOvercast52°F29°F41%1021.2 hPa
Cobb County International Airport - McCollum Field, GA20 mi1.7 hrsVar 310.00 miFair51°F28°F43%993.6 hPa

Wind History from FTY (wind in knots)
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last 24hrS7S4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3NE4N3E4Calm6E6
1 day agoNW5W6W3CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3W3CalmS4SW4S4S3
2 days agoNW6NW6N4N3NW3CalmCalmN4CalmCalmW5W5W34W3NW3CalmNW5NW55NW7NW9NW8W10

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of    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

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Peachtree City, GA (15,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Atlanta, GA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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 numerious 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.