Saturday, February23, 2019 L-36.com


Marine Weather and Tides
Dawsonville, 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 7:10AMSunset 6:27PM Saturday February 23, 2019 3:58 PM EST (20:58 UTC) Moonrise 11:13PMMoonset 10:02AM Illumination 80% 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 Dawsonville, GA
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location: 34.43, -84.12     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 231912
afdffc
area forecast discussion
national weather service peachtree city ga
212 pm est Sat feb 23 2019

Short term tonight through Sunday night
A strong storm system continues to come together over the central
plains this afternoon setting the stage for a potential severe
weather outbreak across parts of the lower mississippi (and
tennessee) river valleys through tonight. This system will send a
strong cold front across north and central georgia late tonight into
Sunday morning, finally shifting us out of this persistent wet
pattern.

This afternoon, the "wedge" has provided yet another day of
cool damp conditions across just about the entire 96-county forecast
area. At least we're seeing a break in the more organized rainfall
that has plagued the northern third of georgia for the past several
days. As of around 18-19z, the edge of the wedge stretches from
around columbus (ga) to just east of birmingham to around
huntsville. Expect this to gradually shift north and east through
the evening, getting very close to the i-75 i-20 corridor around
midnight, and just ahead of broken line of showers and storms that
should be entering NW georgia around this time. SPC href mean cape
shows marked decrease with time distance east from arklamiss area
which is good news for us W respect to overall severe potential.

However, low lvl wind shear of 50+kts will support the threat of
damaging winds and perhaps a brief tornado or two, especially across
northwest and west-central ga late tonight.

Ahead of the front tonight, winds in the higher elevations of north
ga could gust > 30 mph tonight and because of the saturated grounds
and increased likelihood of downed trees, have decided to issue a
wind advisory mainly for the higher elevations (above 1500 feet)
tonight in north ga. Have expanded the advisory south east beginning
around 7am Sunday to include atlanta metro area as northwest winds
gusts in the 30-35 mph range at times through the day.

Rainfall overnight will likely be highest across northwest ga
(again) where several rounds of showers storms occur, along and
ahead the cold front. This should amount to another inch or so in
these areas with locally higher amounts to 2 inches if any stronger
storms train over the same areas. A flood watch will remain in
effect for our northern counties until 12z 7am Sunday - but numerous
points along rivers streams will likely remain in flood into early
next week.

The cold front should clear the entire forecast area by around
midday Sunday. A few stronger showers storms remain possible during
the morning hours south of a macon to sandersville louisville line,
however the overall severe threat should be very limited during this
time.

Rejoice! As drier air works across the entire area Sunday into
Sunday night, shutting off the rain at least into the first part of
next week.

Djn.83

Long term Monday through Saturday
Only tweaks to the long term based on the latest guidance.

Models are inconsistent after Tuesday.

Bdl
previous discussion...

long term models are in good agreement through Tuesday with dry
conditions. Beyond Tuesday the models are a little more in agreement
with the forecast keeping an active zonal flow over the cwa. This
will bring chances of rain back in to the forecast beginning
Wednesday and through the rest of the week. Temperatures will remain
above normal through the long term.

17

Aviation
18z update...

low level "wedge" firmly in place across the area maintaining the
ifr to lifr conditions. With the exception of kcsg, expect the
low CIGS vsby to hang around all day and into the evening ahead of
storm system cold front that will impact the area later tonight.

Line of showers storms associated with front should break up the
low clouds vsby but we get a period of gusty winds and locally
+ra. Behind the front, gusty NW winds will develop with gusts
28-30kts expected (katl) by 14-15z.VFR conditions should prevail
by 18z.

Atl confidence... 18z update...

medium to high all elements.

Djn.83

Preliminary point temps pops
Athens 50 66 36 62 90 100 0 0
atlanta 55 64 37 59 70 70 0 0
blairsville 50 57 30 55 80 70 0 0
cartersville 54 61 34 57 100 50 0 0
columbus 61 69 40 64 90 100 0 0
gainesville 48 62 36 59 80 90 0 0
macon 64 71 38 64 50 60 0 0
rome 54 61 33 58 100 20 0 0
peachtree city 58 66 36 61 70 70 0 0
vidalia 65 75 42 66 30 80 0 0

Ffc watches warnings advisories
Wind advisory from 7 am to 7 pm est Sunday for the following
zones: banks... Barrow... Bartow... Butts... Carroll... Cherokee...

clarke... Clayton... Cobb... Coweta... Dawson... Dekalb... Douglas...

fayette... Floyd... Forsyth... Gordon... Gwinnett... Hall...

haralson... Heard... Henry... Jackson... Jasper... Lamar... Lumpkin...

madison... Meriwether... Morgan... Newton... North fulton... Oconee...

paulding... Pickens... Pike... Polk... Rockdale... South fulton...

spalding... Troup... Walton... White.

Flood watch through Sunday morning for the following zones:
bartow... Catoosa... Chattooga... Cherokee... Dade... Dawson...

fannin... Floyd... Forsyth... Gilmer... Gordon... Hall... Lumpkin...

murray... Pickens... Polk... Towns... Union... Walker... White...

whitfield.

Wind advisory from 7 pm this evening to 7 pm est Sunday for the
following zones: catoosa... Chattooga... Dade... Fannin... Gilmer...

murray... Towns... Union... Walker... Whitfield.

Short term... Djn.83
long term... .Bdl
aviation... Djn.83


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gainesville, Gilmer Memorial Airport, GA19 mi65 minE 82.00 miFog/Mist45°F45°F100%1020.5 hPa

Wind History from GVL (wind in knots)
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Last 24hrE16
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1 day agoSE3CalmCalmW3W4CalmSW4SW3CalmCalmCalmSE3CalmN55CalmE5CalmE4E5E5E64E9
2 days ago--E11E8E11
G18
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G20
E8E9E126NE6N7E7E7E5NE5NE3E43E3CalmCalmCalm

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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Wind Forecast for Peachtree City, GA (15,3,4,5)
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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.