Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Flowery Branch, GA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 7:24AMSunset 7:31PM Saturday September 23, 2017 4:11 PM EDT (20:11 UTC) Moonrise 9:35AMMoonset 8:53PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Flowery Branch, GA
   Hourly   EDIT   Help
location: 34.19, -83.92     debug


Area Discussion for - Peachtree City, GA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kffc 231921
afdffc
area forecast discussion
national weather service peachtree city ga
321 pm edt Sat sep 23 2017

Short term tonight through Sunday night
Isolated convection developing as expected this afternoon over north
ga and areas near kcsg. This activity will move SW as it did last
two days and again could be strong and perhaps approach severe
levels, though intensity likely will be a bit weaker than yesterday
as SBCAPE currently 1000-2000 j kg. Yesterday's SBCAPE closer to
2000 j kg.

After convection dissipates after 9pm, no significant weather impacts
expected in the rest of the short term forecast period. 12z
local NWS hires model guidance including 3km NAM nest in good
agreement showing active weather this afternoon and no convection
Sunday. Patchy light fog possible again Sun morning but will
dissipate after 9a. And until we can get rid of high-amplitude long
wave ridging over the eastern conus, will continue to see temps well
above normal.

Snelson

Long term Monday through Saturday
Made some slight adjustments to late period pops again given some
trends on a less robust front for Thursday. Kept thunder in for
consistency though one could justify too stable at least for
initial passage but progged instability could moderate back from
the southeast for the end of the week. Otherwise did a latest
refresh on recent blend of guidance and forecast looks largely on
track for a nice dry and abnormally warm week. Previous discussion
follows...

baker
prev discussion... Issued 340 am edt Sat sep 23 2017
long term Sunday night through Friday ...

no real changes to the recent extended forecast trends seen with this
model cycle. Medium range models continue to keep the region under a
large, but not particularly strong, upper-level ridge through all
but the tail-end of the period. Upper trough breaks down the ridge as
we head into Thursday Friday of next week and a surface trough
develops across the coastal carolinas and into central south georgia
in the wake of maria as she sweeps up the east coast. Persistent
northeast to north low-level flow keeps the region stable through the
period, and this stable airmass and the absence of strong upper
dynamics or low-level forcing keeps pops low with this late-week
system. Dry and above seasonal normal temperatures reign until then,
replaced by more seasonal temperatures as we head into next weekend.

20

Aviation
18z update...

isold shra tsra possible this afternoon at most forecast points
through coverage really too low to mention directly in forecast.

Have added vcsh to indicate potential for isold shra near
airports.VFR conditions expected thru forecast at most
locations though MVFR vsbys will be possible at airports prone to
radiational fog between 09-12z. Sfc winds will remain east at
5-10kts daytime and less than 5 kts overnight.

Atl confidence... 18z update...

medium confidence on shra tsra likelihood this afternoon.

High confidence on all other elements.

Snelson

Preliminary point temps pops
Athens 65 86 66 87 10 10 5 5
atlanta 68 86 68 86 10 10 5 10
blairsville 59 82 59 83 20 10 5 10
cartersville 65 87 64 88 20 10 5 10
columbus 69 89 69 89 10 10 5 10
gainesville 66 84 66 85 10 10 5 10
macon 65 88 66 88 10 5 5 5
rome 64 87 64 88 20 10 5 10
peachtree city 65 86 65 87 10 10 5 10
vidalia 68 88 68 88 20 5 5 5

Ffc watches warnings advisories
None.

Short term... Snelson
long term... .20 baker
aviation... Snelson


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHDS1 - Strom Thurmond Dam, SC 98 mi32 min ENE 2.9 G 7 87°F

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gainesville, Gilmer Memorial Airport, GA7 mi19 minENE 710.00 miFair86°F59°F40%1016.2 hPa
Gwinnett County Airport-Briscoe Field, GA15 mi27 minENE 610.00 miPartly Cloudy84°F62°F48%1017.3 hPa
Winder, Winder-Barrow Airport, GA20 mi37 minN 010.00 miPartly Cloudy88°F62°F43%1017.9 hPa

Wind History from GVL (wind in knots)
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrE7E7E4E3E4CalmSE3CalmCalmCalmNE3N3NE3NE3NE3--NE4E4E3Calm------E7
1 day agoCalmNE7NW9N5CalmNE4N3NE4NE4NE3NE5NE4NE5NE5NE5NE6NE8NE6NE55CalmE6--Calm
2 days agoW5SW4W4SW3W5NW4N5N3CalmNW3CalmCalmN3N3N3CalmN4NE6E54E4NE4SW3SW3

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Peachtree City, GA (16,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Atlanta, GA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.