Friday, March24, 2017 L-36.com


Marine Weather and Tides
Atlanta, GA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:32AMSunset 7:54PM Friday March 24, 2017 12:15 AM EDT (04:15 UTC) Moonrise 4:23AMMoonset 3:29PM Illumination 13% Phase: Waning Crescent; Moon at 26 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 Atlanta, GA
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location: 33.76, -84.42     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 240132
afdffc
area forecast discussion... Updated for aviation
national weather service peachtree city ga
930 pm edt Thu mar 23 2017

Update
No changes planned for the forecast.

41

Previous
Short term /tonight through Friday night/
Rather progressive pattern expected through the short-term. Current
water vapor imagery reveals a trough across great basin and
southwest us... With a broad ridge located downstream from the lee of
the rockies into the eastern us... While cyclonic flow persists over
new england. At the sfc... A lee cyclone is developing across
colorado in response to the approaching trough... With associated
dryline extending to its south and a cold front to its sw... While
expansive area of high pressure dominates the eastern seaboard and
ridges down the leeward side of the appalachian mountain range.

Despite a progressive pattern... Short-term forecast will remain
quiet. Anticyclonic flow associated with center of sfc high over
northeast is responsible for moisture return/increasing cloud cover
from the south within low-level southerly flow regime today. Cooler
air associated with this airmass also keeping temps in the 60s.

Expecting a quiet end to the day as these conditions persist. Low
temps tonight will be fairly mild with mostly cloudy skies expected.

Could be some very isolated areas of light fog by daybreak
Friday... But really only expecting this in low-lying areas. T-td
spread will be too high due to cloud cover and slightly elevated
winds for widespread fog.

Friday will be dry and warm with highs in the 70s /higher terrain
low 60s/ as mid level ridge and associated h5 height rises continue
to work their way into the region. Sfc high pressure that was
centered over the northeast on Thursday will shift well offshore on
Friday... But ridge influence still expected to be dominant over the
southeast. This will continue to allow lower-level moisture to
increase and clouds to persist.

Friday night will be quiet ahead of the next storm system that is
set to move in early in the long-term. Will start to see some mid
level height falls overnight as the stacked cyclone pushes into the
mid-mississippi valley. We again stay dry with lows in the 50s
/higher terrain 40s/.

Kovacik

Long term /Saturday through Thursday/
Medium-range models continue to remain very progressive through the
period. No significant changes to the recent trends and little
changes made to the long term forecast grids with this cycle.

Weekend system and the early work-week system continue to show
enough instability to maintain thunder in the forecast, however both
systems also continue to show the better energy lifting north of the
state as instability wanes and shear remains limited at best. Please
see the previous long term forecast discussion below.

20
previous long term discussion /Friday night through Wednesday/...

surface high pressure well off-shore will continue to move further
out to sea Friday night into Saturday. Meanwhile, ridging aloft
will erode ahead of the next storm system. Expect increasing
clouds Saturday afternoon/evening as a front approaches. In the
mid- levels, a closed low dropping out of the rockies will pivot
toward the ohio river valley through the weekend. A cold front
associated with this system will continue to track east across the
central conus, becoming washed out before reaching georgia. In
addition, the dynamics associated with this system will lift north
as it approaches Saturday night into Sunday. Anticipate showers
will move into northwestern georgia Saturday afternoon/evening.

With very little surface convergence and much of the energy within
the mid-levels waning, do not have the highest confidence that
this system will hold together, especially through the day
Sunday. Therefore, current thinking is highest pops across the
northern tier of georgia Saturday night into Sunday with the rest
of the area experiencing chance pops. Also, given weak
instability and shear, kept schc thunderstorm in Saturday evening
through Sunday. The system will lift to the north with the front
never quite making it into georgia.

For the first half of the work-week model inconsistencies are
making confidence a bit lower. However, a progressive pattern will
continue during this time with another wave of precipitation
(showers/thunderstorms) possible Monday afternoon through
Tuesday. The ecm has another potent system approaching quickly by
mid-week under warm southerly flow. While the GFS is introducing
a distinct frontal passage by Wednesday, bringing drier and cooler
air into the region thereafter. Have hedged at the end of the
period in hopes of seeing better model continuity in time.

Under warm southerly flow through much of the long term, expect above
normal temperatures, highs primarily in the 70s.

26

Aviation
00z update...

sct to bkn clouds 040-050 should continue through much of the
night. Expect MVFR ceilings to develop just before sunrise
with some improvement by 15z. Scattering possible late afternoon
Friday. Winds east to southeast 8 to 10kt overnight increasing
again Friday after 14z to 10 to 15kt.

//atl confidence... 00z update...

medium on cloud trends... Especially MVFR coverage Friday morning
high on all other elements
41

Preliminary point temps/pops
Athens 45 71 52 75 / 5 5 5 20
atlanta 49 71 55 75 / 5 5 0 30
blairsville 42 63 49 68 / 10 10 10 30
cartersville 49 70 54 74 / 5 5 5 40
columbus 53 76 57 78 / 0 0 0 30
gainesville 46 66 52 72 / 5 5 5 30
macon 49 76 55 79 / 0 0 0 20
rome 49 71 54 74 / 5 5 5 40
peachtree city 48 72 52 75 / 5 5 0 30
vidalia 51 75 56 79 / 0 0 0 20

Ffc watches/warnings/advisories
None.

Short term... 41
long term... .20
aviation... 41


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Atlanta, Fulton County Airport-Brown Field, GA5 mi23 minE 410.00 miOvercast61°F36°F39%1029.4 hPa
Atlanta, Hartsfield - Jackson Atlanta International Airport, GA7 mi24 minESE 710.00 miOvercast60°F39°F46%1029.6 hPa
Atlanta, De Kalb-Peachtree Airport, GA10 mi23 minE 410.00 miOvercast58°F35°F42%1029.9 hPa
Marietta / Dobbins Air Force Base, GA13 mi18 minE 810.00 miOvercast59°F36°F42%1029.7 hPa
Marietta, Cobb County-McCollum Field Airport, GA20 mi89 minSE 610.00 miOvercast59°F37°F45%1029.8 hPa

Wind History from FTY (wind in knots)
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Last 24hrN3CalmE3E9E8E7NE8E14
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1 day agoSW3SW3SW3CalmNW5CalmN5N6NW5NW6NW6NW7NW9NW9NW8NW7N10NW6NW9NW4CalmCalm3Calm
2 days agoSW3W4SW3SW6SW5SW3S3S4SW4SW5W8NW11S3W8W8W10
G15
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G18
W10
G18
W6W8N8SW5SW6

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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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Southeast    EDIT
Geos

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