Friday, August18, 2017

Marine Weather and Tides
Cartersville, 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 7:02AMSunset 8:23PM Friday August 18, 2017 2:49 AM EDT (06:49 UTC) Moonrise 2:36AMMoonset 4:59PM Illumination 17% Phase: Waning Crescent; Moon at 26 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 Cartersville, GA
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location: 34.2, -84.78     debug

Area Discussion for - Peachtree City, GA
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Fxus62 kffc 180547
area forecast discussion... Updated for aviation
national weather service peachtree city ga
145 am edt Fri aug 18 2017

Convection has long since dissipated but pre frontal activity will
need to be monitored closely across northern alabama. Current
forecast has a good handle on both current dry conditions and
approaching front. No changes planned.


Prev discussion issued 832 pm edt Thu aug 17 2017
prev discussion... Issued 330 pm edt Thu aug 17 2017
short term tonight through Friday night ...

afternoon water vapor imagery reveals a fairly progressive pattern
across the conus. A weak ridge across the far southern states is
gradually becoming flattened by digging cyclonic flow across the
northern us. Within the broader cyclonic flow... A vigorous shortwave
was migrating northeast across the upper great lakes... With a
notable speed MAX digging into the northern plains from the northern
rockies. At the sfc... A cold front was associated with the great
lakes storm system and extends from northern wi S SW into southern
ok and northern tx.

Rest of today and tonight: despite weak forcing for descent under
the upper level ridge... Ample gulf moisture from the persistent
stagnant airmass has allowed for enough destabilization of the
boundary layer to promote the development of scattered showers and
thunderstorms. Expect this continue into the mid evening hours.

Given the moist airmass... Heavy rain will be the main
concern... Although gusty winds may also occur. Should see a break in
activity into the overnight hours with loss of daytime
heating... Although a weak "cold" front will be approaching nw
georgia after midnight.

Friday: opted to go for a slower progression of the front due to the
time of year and increasing displacement of the upper level
dynamics. The front should be in the vicinity of far north georgia
between 06z-12z. A few showers and storms could be ongoing as the
front enters the cwa. Despite lack of appreciable dynamics with the
front... Do think it will help enhance diurnal activity across north
and central georgia into the afternoon and through the evening. With
mid level flow <20kts and mid level temps between -4 &-5c... Think
severe chances are slim... But could see a few strong updrafts with a
wind... Heavy rainfall... And lightning threat.

Tropics continue to light up in the short term... With potential
tropical cyclone nine becoming an actual tropical storm in the very
near future NHC showing 100% chance of formation in the next 48
hours . Models also picking up on a weak upper level feature across
eastern cuba... Which can be seen in upper level goes-16 WV imagery
very well... And pushing it into the gulf by the end of the short

long term Saturday through Thursday ...

no significant changes made to the extended forecast grids at with
this cycle. Medium range model tends remain consistent with recent
runs through the weekend and the upcoming work-week. Please see the
previous long term forecast discussion below.

previous long term forecast discussion Friday night through
Wednesday ...

a trough of low pressure will dig into the great lakes region to
start the long term, pivoting through nova scotia by late Sunday.

At the surface, a trailing front associated with the trough will
start to move through the region, eventually stalling across
central ga by Saturday afternoon. High pressure will build into
the northern half of the region through the remainder of the
weekend, before the front gradually lifts north Monday into
Tuesday. Another trough and surface front will approach from the
north by mid-week.

Expect residual scattered showers and thunderstorms Friday
evening well ahead of the surface front approaching from the
northwest. The front will cross the northern portions of ga
Saturday morning, eventually becoming stalled in central ga. This
will be the catalyst for thunderstorm development during the
afternoon and evening hours. With surface high pressure building
in from the north, the front remains stationary through Sunday,
perhaps shifting ever so slightly northward. This will once again
be the axis by which we see better coverage for convection during
the afternoon. The mid-level ridge starts to build back into the
region by early Monday with the surface high slowly moving off the
mid-atlantic coast. So, while this isn't typically the set up for
widespread convection, the stationary boundary will still be
enough convergence to generate thunderstorms by Monday afternoon.

This may wreak havoc for those wanting to witness the solar
eclipse. As it stands, it looks like the better cloud and
precipitation coverage will be along and south of i-20 as models
are trying to place the front in this general vicinity. However,
any little deviation in this surface feature or upper level
pattern could mean different cloud and precipitation coverage.

Based on the current model trends, the location that has the
lowest probability of precipitation and cloud coverage is across
the far northern tier of ga.

The ridge aloft will quickly break down by Monday night Tuesday
morning as an upper trough dives down toward the eastern conus.

Impulses in the mid-levels will allow for better coverage of
showers thunderstorms Tuesday into Wednesday, especially across
the north.

Temperatures will be around normal through the period; albeit a
bit above normal Sunday with less clouds. Temperatures during the
eclipse (Monday) look to stay steady an hour before the maximum
obscurity (between 1pm-2pm), then drop a couple degrees up to 30
minutes after MAX obscurity (3pm). Temperatures are expected to
rebound quickly after the eclipse. The temperature drop will be
less for those under cloud cover precipitation. This drop in
temperature should not impact the high temperature expected during
the afternoon.


06z update...

expectVFR through the night but will keep sct MVFR deck toward
sunrise. Otherwise look for diurnal cumulus. A front should come
through today which could provide an early start and end across
northern terminals but chances warrant no more than 30 pops at
this time. Winds remain on west side today.

Atl confidence... 06z update...

high on all elements... Except medium on timing of front.


Preliminary point temps pops
Athens 74 92 72 91 30 50 20 20
atlanta 75 90 73 90 30 50 20 20
blairsville 69 85 63 86 30 50 10 10
cartersville 74 90 71 90 30 50 10 10
columbus 77 93 75 93 20 50 30 30
gainesville 74 91 71 89 30 50 10 10
macon 76 94 75 92 30 50 30 30
rome 74 90 69 92 30 50 10 10
peachtree city 73 91 72 91 30 50 20 20
vidalia 77 95 76 93 30 50 30 50

Ffc watches warnings advisories

Short term... 41
long term... .Rw
aviation... 41

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cartersville Airport, GA6 mi57 minN 010.00 miFair75°F73°F96%1014.7 hPa
Cobb County International Airport - McCollum Field, GA16 mi59 minW 610.00 miFair79°F72°F79%1016.4 hPa
Dallas Paulding County Regional Airport, GA21 mi55 minW 510.00 miFair79°F75°F89%1016.9 hPa
Rome, R. B. Russell Airport, GA23 mi57 minSSW 410.00 miA Few Clouds78°F73°F87%1014.2 hPa
Marietta / Dobbins Air Force Base, GA23 mi52 minW 610.00 miFair77°F71°F84%1015.1 hPa

Wind History from VPC (wind in knots)
Last 24hrCalmCalmCalmCalmCalmCalmCalm334NW3CalmCalm53S53CalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalm3CalmCalmCalm3Calm33CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalmCalmCalmCalm43CalmCalmCalmCalmCalmCalmCalmCalm

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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southeast    EDIT

Wind Forecast for Peachtree City, GA (2,6,7,8)
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Ground Weather Radar Station Atlanta, GA
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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 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 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.