Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Guntersville, AL

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 6:45AMSunset 5:08PM Wednesday January 24, 2018 1:19 AM CST (07:19 UTC) Moonrise 12:16PMMoonset 12:26AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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 Guntersville, AL
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location: 34.37, -86.25     debug


Area Discussion for - Huntsville, AL
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Fxus64 khun 240510
afdhun
area forecast discussion
national weather service huntsville al
1110 pm cst Tue jan 23 2018

Update
For 06z tafs.

Near term (tonight)
issued at 811 pm cst Tue jan 23 2018
rgb imagery shows a stratus deck based at 025-035agl slipping
southeast into northern al at this hour. This trend will continue,
with most clouds staying along and north of msl-hsv-4a9. The western
edge of the clouds was clearing far western tn and this trend should
also continue eastward overnight. Have made some modifications to
account for the near term cloud trends. Temperatures have already
dipped into the middle to upper 30s this evening, and have made
adjustments to hourly temps. Morning low forecasts look good if the
clearing trend presents itself as indicated.

Short term (Wednesday through Thursday night)
issued at 233 pm cst Tue jan 23 2018
an amplifying mid-tropospheric shortwave trough is expected to drop
southeastward from western NE into mo overnight, and spread rapidly
southeastward across tn ky tomorrow before reaching the southern
appalachians by 00z Thursday. Although guidance does suggest that
weak elevated vertical motions will develop as this system crosses
the region tomorrow morning, moisture in the same layer will be
insufficient to support more than an increase in cloud cover.

Stronger low-level subsidence in the wake of the departing trough
will allow any lingering stratocumulus clouds to dissipate shortly
after sunrise, leaving sunny skies during the afternoon, and this
should allow temps to warm into the lower 50s for most of the area.

Northwest flow aloft will increase in the wake of tomorrow morning's
trough, providing mostly clear skies on Wednesday night Thursday
morning. At the surface, a broad ridge will translate northeastward
across the tn valley providing calm winds, and the combination of
these factors should allow for strong radiational cooling. Lows will
likely fall into the mid 20s for most outlying areas, and (although
not explicitly mentioned in the forecast) conditions will be
favorable for patchy freezing fog in river valleys and near large
bodies of water. Light variable winds will continue on Thursday, with
abundant sunshine anticipated as a mid-level shortwave ridge
approaches the region from the southwest, and this should provide
even warmer MAX temps in the mid 50s. A slight warming trend will
continue Thursday night, as stronger southerly return flow begins to
develop.

Long term (Friday through Tuesday night)
issued at 233 pm cst Tue jan 23 2018
during the day on Friday, southwest return flow around the surface
high (over the carolinas and off the eastern seaboard) increases,
especially near and west of the i-65. Further east, winds may remain
a bit more southeasterly keeping highs a few degrees cooler (52 to 56
degrees). Not expecting much cloud cover, so couldn't rule out a few
highs reaching 60 degrees, but think higher temperatures in the west
will mainly remain below 60 degrees. Models tighten up the pressure
gradient in response to the storm system pushing into kansas and the
western great lakes region. Thus kept gusts up to around 20 mph in
the forecast in the afternoon.

Models remain consistent from last night keeping the best
convergence and moisture content west of alabama through Friday
night, maybe into Saturday morning. Thus only have isolated to widely
scattered chances of light showers in the forecast after midnight on
Friday into the early morning hours on Saturday. There will be deep
enough moisture and ample convergence for mostly cloudy conditions to
develop around midnight across northern alabama. Newest guidance
looks to be coming into a little better agreement on the evolution of
the next storm system moving through southeastern canada during this
period and into the weekend. Models tend to develop stronger
convergence and deeper moisture ahead of the longwave trough axis
associated with this system Saturday afternoon into Saturday night. A
complicating factor is that models continue to show some upper level
forcing energy pushing northeast from the central gulf of mexico at
the same time. However, they are very different with the speed and
movement of this feature. This may help to either increase rain
chances or keep them lower (ecwmf solution) or delay high
precipitation chances (gfs solution). At this point went a bit below
blended guidance given the uncertainty with 30 to 40 percent pop
Saturday afternoon. Highs in the lower 60s look reasonable given the
925 mb temperatures and mixing of boundary layer.

There is quite a spread in model precipitation guidance given the
differing solutions with the energy pushing northeast or east-
northeast from the gulf of mexico Saturday night through Sunday. Thus
keeping a bit below guidance, with high chance or likely pops
Saturday night into Sunday. Timing of heavier rainfall and if it will
hang around through Sunday is very uncertain. Due to limited
instability and the uncertainty with this forecast, leaving
thunderstorms out of the forecast with through Sunday.

Somewhat cooler air returns Sunday night into early next week, as
the storm system pushes east of the area. Highs return to the mid 40s
to lower 50s and lows drop back into the upper 20s to 30s.

Aviation (for the 06z tafs through 06z Wednesday night)
issued at 1110 pm cst Tue jan 23 2018
low clouds have pushed southward and into the kmsl and khsv terminals
over the last hour. These clouds, currently around 3000 feet, have
eroded from the west, and are now east of kmsl. Trends suggest that
the clouds will continue to erode over the next couple of hours and
push out of the khsv terminal by 08z. This will leaveVFR conditions
through the remainder of the period. Winds will remain from the
north-northwest and may become gusty during the afternoon on
Wednesday.

Hun watches warnings advisories
Al... None.

Tn... None.

Near term... 17
short term... 70 dd
long term... Ktw
aviation... 73
for more information please visit our website
at weather.Gov huntsville.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Albertville, Albertville Municipal Airport, AL10 mi25 minN 010.00 miPartly Cloudy32°F32°F100%1023.4 hPa

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Last 24hrW13
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1 day agoS6SE6SE5CalmS5SE5SE8S8
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2 days agoCalmSE5S3CalmSE4SE6SE4SE3S4S7S6SW6SE6S9S7S5SE3S4S4SE4SE4SE4SE5SE6

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Southeast    EDIT
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Wind Forecast for Huntsville, AL (2,6,7,8)
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Ground Weather Radar Station Northern Alabama
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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.