Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Acworth, 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 7:36AMSunset 7:53PM Saturday March 23, 2019 12:21 PM EDT (16:21 UTC) Moonrise 10:00PMMoonset 8:34AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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 Acworth, GA
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location: 34.1, -84.62     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 231408
afdffc
area forecast discussion
national weather service peachtree city ga
1008 am edt Sat mar 23 2019

Update
Current forecast in great shape with temperatures headed for the
lower 70s for a large portion of the area to go along with very
dry conditions. Fire danger statement definitely looks on target
and no changes planned there or for the remainder of the forecast.

Deese

Prev discussion issued 723 am edt Sat mar 23 2019
prev discussion... Issued 339 am edt Sat mar 23 2019
short term today through Sunday ...

high pressure will move overhead today and tonight, but begin to
shift offshore on Sunday. A frontal boundary will begin to approach
the mississippi river on Sunday, with some light precip breaking out
ahead of the boundary. As the high center shifts offshore, the
surface flow will shift to a more SE S direction, helping to
increase the low level moisture across the outlook area. Even with
the low level moisture increasing, rain chances only remain in the
20 percent or less range.

Nlistemaa
long term Sunday night through Friday ...

to begin the extended period, the upper-level ridge that was
positioned over the southeastern CONUS will move off to the east and
will be replaced nearly zonal westerly flow aloft. As the surface
high associated with the ridge shifts eastward off the mid-
atlantic coast, southerly flow at the surface will allow for
gradual moisture return to the forecast area. Increasing cloud
coverage will build into the area from NW to SE starting late
Sunday ahead of an approaching positively-tilted trough dropping
southeastward from the ohio valley. Developing vorticity around
the base of the trough will give support to a strengthening
cold front at the surface.

Precipitation will arrive ahead of the cold front and spread from nw
to SE as the front progresses towards the southeastern states on
Monday. Chance pops are thus anticipated to begin across north
georgia Sunday night into Monday morning, followed by likely to low-
end categorical pops across north georgia and high-end chance pops
elsewhere in our area during the daytime Monday. Some instability is
expected throughout the area on Monday afternoon and evening, with
sbcape values in the 500-750 j kg range. As a result, a chance of
thunder is possible during the afternoon evening on Monday. Cold
temperatures at the 700-500 mb layer could contribute to some
enhanced lapse rates aloft. However, forecast shear values appear
to be fairly marginal. As such, the probability of widespread
organized severe weather is low, but it is nonetheless possible to
see some isolated strong to severe thunderstorms as the front
moves through the area. Severe weather potential will continue to
be monitored in advance of this system.

Although the trough axis and associated cold front are expected to
clear the forecast area during the overnight hours late Monday, a
weak upper-level shortwave behind the main trough could lead to some
additional light showers on Tuesday. Less moisture appears to be
available for thus disturbance to work with than earlier forecast
runs, so pops have been limited to low-end chance during the day
Tuesday. High pressure will return to the area on Wednesday as a
surface high builds southward from east of the appalachians, and
an upper level ridge meanwhile slides eastward over the region.

This will lead to a return to dry conditions on Wednesday, along
with gradual warming each day until the next system approaches the
area by the early part of next weekend.

King
fire weather...

rh values will be very low today, and range from the upper teens to
20 percent. Have undercut guidance only a little bit today. Winds
remain out of the nnw early this morning, but should go light and
variable during the afternoon as high pressure moves directly
overhead. Winds should switch to the SE overnight as the high center
shifts offshore the eastern seaboard. With the winds shifting to the
se s, low level moisture will increase overnight and Sunday. Have
undercut the guidance a little on Sunday as models tend to moisten
up the column a little too fast. However, as of right now, minrh
values range 27 to 35 percent.

Aviation...

12z update...

vfr through the period. Nnw winds around 5-6kt through mid
morning. Hi-res models are now progging a brief period of light
east winds during the late morning early afternoon before going
light and variable. Winds should go SE shortly after sunset.

Atl confidence... 12z update...

low-med confidence on wind direction. Speeds will remain 5-6kt or
less. High confidence remaining elements.

Nlistemaa

Preliminary point temps pops
Athens 70 42 72 52 0 0 0 20
atlanta 70 46 72 54 0 0 5 20
blairsville 67 38 66 48 0 0 10 40
cartersville 68 42 71 52 0 0 5 30
columbus 75 47 76 54 0 0 0 10
gainesville 67 42 69 52 0 0 5 30
macon 73 43 75 52 0 0 0 10
rome 68 40 71 52 0 0 10 40
peachtree city 71 42 74 52 0 0 0 20
vidalia 74 46 77 54 0 0 0 10

Ffc watches warnings advisories
None.

Short term... Deese
long term... .King
aviation... Nlistemaa


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cobb County International Airport - McCollum Field, GA6 mi33 minVar 310.00 miFair57°F27°F32%1097.5 hPa
Cartersville Airport, GA12 mi28 minN 710.00 miFair57°F28°F33%1025.6 hPa
Marietta / Dobbins Air Force Base, GA13 mi25 minNE 410.00 miA Few Clouds60°F23°F25%1024.7 hPa
Dallas Paulding County Regional Airport, GA22 mi26 minNNE 610.00 miFair55°F26°F33%1025.4 hPa
Fulton County Airport-Brown Field, GA23 mi28 minNE 610.00 miFair60°F28°F30%1024.8 hPa
Atlanta, De Kalb-Peachtree Airport, GA23 mi28 minVar 59.00 miFair59°F30°F33%1025 hPa

Wind History from RYY (wind in knots)
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Last 24hrNW12
G17
NW10
G14
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G19
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W13
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W11W10W6W7W7W7W6NW4NW5NW5NW4W3NW4NW33Calm53
1 day agoNW8
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W12W6W9W10NW7NW10
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W7NW7NW7NW4NW7NW10
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2 days agoS5CalmNE4E5--CalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalmSW4CalmW8W8W5W10NW10W12
G18

Tide / Current Tables for
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Weather Map and Satellite Images
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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 (12,3,4,5)
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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.