Friday, April20, 2018 L-36.com


Marine Weather and Tides
Dawsonville, GA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:55AMSunset 8:12PM Friday April 20, 2018 4:28 PM EDT (20:28 UTC) Moonrise 9:45AMMoonset 12:00AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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 Dawsonville, GA
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location: 34.43, -84.12     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 201848
afdffc
area forecast discussion
national weather service peachtree city ga
248 pm edt Fri apr 20 2018

Short term tonight through Saturday night
Another quiet weather day across the area as weak shortwave ridging
builds into the region. In the lower levels... High pressure
continues to build into the area in the wake of yesterday's frontal
system. Altho CAA has subsided... A cooler airmass resides across the
state today with high temps topping off in the 60s and 70s under
clear skies. Tranquil conditions will persist thru the overnight
hours... Tho moisture will begin to slowly increase from the south.

For Saturday... As main center of the sfc high moves into the eastern
great lakes region... Weak wedge will develop along the eastern side
of the appalachians. The leading edge of the wedge frontal boundary
will kick wind speeds up 10-15mph sustained by mid morning where
they will continue into the late afternoon. Periodic gusts will be
possible for areas nearest the actual boundary. As this occurs
across our area... A glance upstream reveals a notable sfc low
developing in the vicinity of the west texas terrain as a strong
closed low moves into the southern plains. This low should have no
problem rapidly pulling rich theta-e air north across the western
gulf region. This system will be enroute to the local area Saturday
night and into the long term where pops will quickly be on the
increase. Given stable conditions across georgia overnight
Saturday... Have not included thunder potential.

Kovacik

Long term Sunday through Friday
No major changes to the long term. A wet period can still be
expected with the greatest rain amounts later Sunday through
Monday night.

Bdl
previous discussion...

active fcst period on tap with the main player being the influence
of a slow moving closed low from the west interacting with a
classical cad wedge from the northeast Sunday through early
Tuesday. The two features will result in persistent moisture
overrunning and widespread continued shower development. Will need
to watch for flooding concerns given some higher QPF trends
(generally 2-4 inches). Included hydrology section below. Thinking
that the heaviest amounts will end up being where the wedge front
meanders (northern central ga into eastern north ga), which for
now looks to match up in the orientation of the MAX storm total
qpf. Enough progged instability present at least for Monday
afternoon to include slight thunder mention confined for still the
southern tier.

Kept some pops in for the northern majority of the CWA for Tuesday
into Wednesday as the trough starts to lift northward as it
dampens into the other longwave energy, then guidance has less
consensus on timing and amount of moisture present with several
other potential shortwaves fronts for thurs fri. Will need to see
more agreement to warrant much higher than slight pops at the
moment.

Temps below normal thru period with coolest days on Sunday thru
Tuesday given aforementioned wedge and precip. North ga should
have limited diurnal range from the mid low 50s to mid low 60s.

Baker

Fire weather
The local area will be in a transition period thru
Saturday night as moisture is expected to gradually increase from
south to north thru the period ahead of the next major weather
system. Thru the day on Saturday... Dewpoints are expected to
increase from the upper 30s into at least the 40s which corresponds
to rh values above fire danger criteria. In addition... A weak wedge
front will build into the area. Given persistently dry fuels... Could
have localized areas meeting high fire danger criteria Saturday
afternoon where moisture return is slowest or where winds become
elevated near along the wedge front. Given isolated nature of
this... Have opted to not issue a fire danger statement

Hydrology
Conditions will continued to be monitored for heavy rainfall
potential, most so Sunday night and Monday. The area could receive
amounts of 2 to 4 inches Sunday through Monday night. A flood or
flash flood watch could be needed with future forecasts.

Aviation
18z update...

clear skies will continue for the rest of today and thru the
overnight hours. Moisture will gradually increase from the south
on Saturday where by the morning hours could begin to see some
few-sct clouds move into csg. Elsewhere expect few-sct into the
afternoon or just outside of this cycle. Right now do not expect
enough coverage for ceilings tho will need to watch csg. Wind
gusts this afternoon should begin to decrease in the next few
hours and become 5kts or less after sunset. NE winds will turn se
Saturday morning and increase 10-15kts with some gusts neat 20kts
possible.

Atl confidence... 18z update...

high confidence on all forecast elements.

Kovacik

Preliminary point temps pops
Athens 42 72 49 66 0 0 30 50
atlanta 46 72 52 64 0 0 50 80
blairsville 39 67 44 61 0 0 40 60
cartersville 43 72 52 64 0 0 60 80
columbus 47 75 56 69 0 5 60 90
gainesville 44 70 49 63 0 0 40 60
macon 44 75 53 69 0 5 50 70
rome 41 73 51 65 0 0 60 90
peachtree city 41 73 51 65 0 0 60 80
vidalia 47 75 55 71 0 5 30 50

Ffc watches warnings advisories
None.

Short term... Kovacik
long term... .Bdl
aviation... Kovacik


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gainesville, Gilmer Memorial Airport, GA19 mi36 minESE 710.00 miFair64°F26°F24%1025.9 hPa

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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    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Peachtree City, GA (16,3,4,5)
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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.