Monday, March25, 2019 L-36.com


Marine Weather and Tides
Marietta, 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 7:33AMSunset 7:54PM Monday March 25, 2019 1:18 AM EDT (05:18 UTC) Moonrise 12:00AMMoonset 9:52AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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 Marietta, GA
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location: 34, -84.47     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 250500 aab
afdffc
area forecast discussion... Updated
national weather service peachtree city ga
100 am edt Mon mar 25 2019

Update for aviation
Prev discussion... Issued 713 pm edt Sun mar 24 2019
update...

a band of scattered light showers sprinkles has developed over
northern al. Hi-res has this moving into extreme north ga through
this evening. With dry air in place, not quite sure enough
moisture will make it to the ground, but there is enough of a risk
to add a 20 pop across extreme north ga through 06z. No other
changes planned.

Significant large hail event possible Monday late afternoon and
evening...

short term tonight through Monday night ...

main concern in short term period is threat for strong severe
convection Monday afternoon and early evening.

Latest guidance still indicate that strong to severe hail event
on tap for Monday late afternoon and evening. As mentioned
previously, steep lapse rates with MLCAPE approaching 1000 j kg
and strong deep vertical wind shear all coming together, best
combination of shear and instability over westcentral ga and atl
metro areas. Hail up to or even larger than 2 inches expected.

Can't rule out some brief quasi-linear storms and multicells, but
expecting to see mostly cells and supercells with weak rotation.

A little concerned that 12z href (high res ensemble forecast from
spc) shows some decent updraft helicity potential in and near atl
metro 21z-00z. Can't rule out brief weak tornado in spite of very
weak low level vertical wind shear. Storms should move out and or
dissipate by 10pm.

Precip amounts coming in a bit higher than prev forecasts, but
total amounts still less than 1 in. No issues with flooding
expected as soil conditions have dried considerably in the last 2
weeks. Could see significant rises on creeks streams in fast-
response urban basins in atl metro, especially if storm becomes
slow moving supercell and tracks over a favorably-oriented shaped
(wnw-ese) basin.

Otherwise, expect moderating diurnal ranges for temps with warmer min
temps and a little cooler MAX temps due to increased low level
moisture and clouds precip. Fire danger will be much reduced in
this pattern.

Snelson
long term Tuesday through Sunday ...

as the long term portion begins, will see a secondary closed upper
low drop through alabama and ga. Although instability will be very
limited with this system, it has a very cold core with -24c at
500mb. Would not be surprised at all to see some small
hail graupel emerge from this despite the lack of thunder. Will
increase pops slightly for Tue afternoon, but otherwise forecast
for this part of the extended looks on track.

Clearing conditions with no rain expected until weeks end and into
the weekend. Will await the new ECMWF but as of now significant
differences exist with the GFS diving upper low into the 4 corners
and keeping there while the ECMWF is much more progressive in
bringing a front through the area. Think low to mid range pops
that the grids show currently is on target until models resolve
their differences.

No other changes to the extended made other than loading in some
of the new guidance for temps and dewpts which are not off that
far from the previous versions.

Deese

Aviation
06z update...

for the most part,VFR through the forecast with loweringVFR ceilings
and potential for MVFR conditions associated with heavier showers
and thunderstorms this afternoon into the evening. Surface winds
staring calm or light ssw then wsw around 10 kts and becoming wnw
late today and tonight.

Atl confidence... 06z update...

high confidence for ceilings to start then low to medium
confidence for ceilings and thunderstorms after 13z.

High confidence for winds.

Bdl

Preliminary point temps pops
Athens 70 49 61 39 80 60 20 5
atlanta 67 50 59 41 80 50 20 10
blairsville 61 44 55 36 90 40 30 10
cartersville 66 47 57 41 80 40 20 10
columbus 75 52 63 43 60 60 30 10
gainesville 64 48 58 39 80 40 20 10
macon 75 52 62 40 60 60 30 10
rome 67 47 59 40 80 30 20 10
peachtree city 71 48 60 40 80 60 30 10
vidalia 77 55 65 42 40 60 30 20

Ffc watches warnings advisories
None.

Aviation... Bdl


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marietta / Dobbins Air Force Base, GA6 mi23 minSSW 310.00 miMostly Cloudy58°F40°F52%1018.9 hPa
Cobb County International Airport - McCollum Field, GA7 mi31 minSW 310.00 miOvercast61°F39°F46%991.6 hPa
Atlanta, De Kalb-Peachtree Airport, GA12 mi26 minN 08.00 miMostly Cloudy56°F42°F60%1018.9 hPa
Fulton County Airport-Brown Field, GA15 mi26 minWSW 310.00 miMostly Cloudy56°F43°F62%1019 hPa
Cartersville Airport, GA22 mi26 minN 010.00 miFair55°F43°F64%1018.7 hPa
Atlanta, Hartsfield - Jackson Atlanta International Airport, GA24 mi27 minSW 510.00 miMostly Cloudy60°F41°F50%1019.3 hPa

Wind History from MGE (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmSE3S5SE6S5SW13
G17
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S6S5SE7S9SW2CalmNW1CalmSE3S3
1 day agoNW9NW8NW8NW4NW5S2NW6NW6N10NW8NE4N5SW3NW4CalmW7S4W6--NW3CalmCalmCalmCalm
2 days agoNW12
G19
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W13W9W9W8W9NW4

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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wmap_A
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

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Peachtree City, GA (1,6,7,8)
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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.