Friday, January17, 2020
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Marine Weather and Tides
Guntersville, AL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:48AMSunset 5:00PM Friday January 17, 2020 6:11 PM CST (00:11 UTC) Moonrise 12:43AMMoonset 12:36PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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 180003 AFDHUN

Area Forecast Discussion National Weather Service Huntsville AL 603 PM CST Fri Jan 17 2020

UPDATE. For 00Z TAFS.

NEAR TERM. (Tonight) Issued at 242 PM CST Fri Jan 17 2020

An upper trough was digging through the Rockies with a lee cyclone over eastern CO. An Arctic high has shifted into the eastern U.S. with a wedging influence across the southeast including AL. Dew points remain in the 20s to around 30 this afternoon over our area, with upstream dew points falling into the teens in northeast GA. The lower atmosphere is already very dry, and will continue to be through tonight. We will keep a very low PoP in far northwest AL toward morning. A pronounced south-southwesterly low level jet will advect a layers of clouds above 2500 fg agl late tonight as well. This combined with warm advection and the breezy conditions should keep temperatures in the 40s tonight for our central and western counties. A few spots near the GA border may dip just below 40 as a result of the wedge influence. Winds will stay below advisory criteria overall, but higher elevations may experience gusts over 30 mph at times.

SHORT TERM. (Saturday through Sunday night) Issued at 242 PM CST Fri Jan 17 2020

The strong low level jet will magnify moisture transport greatly through the morning into the early afternoon hours in advance of the Arctic cold front. This should result in light precip with the lower clouds within isentropic ascent. But as the day goes on, our area will be within low level speed divergence as the low level jet max pulls northeast through TN into KY. Also, an elongated 7-5h shortwave ahead of the main trough axis will shift east and southeast of the TN valley by midday Saturday limiting upper level QG forcing. The dPVA associated with the main upper low/trough will be to our north as the low swings east through the OH valley. So, QG forcing will not be too impressive with this event overall. Cold frontal convergence should bring widespread light to moderate showers during the frontal passage Saturday afternoon and early evening. With a low level inversion remaining strong and limited elevated instability, have opted to keep thunderstorms out of the forecast. Breezy conditions will persist during the morning, but remain below advisory levels.

Sunday and Sunday night will be sharply colder than recent weeks with gusty northerly flow enabling strong cold advection. High temperatures will remain in the m-u30s atop the higher elevations of the Cumberland Plateau in Franklin County TN and Jackson County AL. Highs will only be in the lower 40s in north AL. By Monday morning, lows will be in the l20s. With north winds remaining at 5-10 mph in valleys, and 10-15 mph atop the Cumberland Plateau, wind chills will be in the 10s/single digits respectively.

LONG TERM. (Sunday night through Thursday) Issued at 242 PM CST Fri Jan 17 2020

The beginning of the extended period will start off rather cold as a strong Arctic airmass digs south over the eastern U.S. Despite mostly clear skies on Monday, high temperatures will struggle to make it out of the mid 30s throughout the day. Strong radiational cooling will lead to overnight low temperatures in the lower 20s to perhaps even upper teens Monday night into Tuesday morning. A steady warming trend will begin on Tuesday as an approaching upper ridge begins to build over the southeastern US. Expect a dry forecast through mid week, then southeasterly flow will begin to advect better moisture into the area late in the week. High temperatures will approach 60 degrees by the end of the work week. Our next chance for rain looks to come on Friday, as a low pressure system tracks northeast over the Central Plains and Midwest states. Being in the Day 7-8 range, model inconsistency is evident when it comes to timing and the overall track of the upper level system. For now, it appears that showers are likely through the late morning and afternoon hours.

AVIATION. (For the 00Z TAFS through 00Z Saturday evening) Issued at 603 PM CST Fri Jan 17 2020

VFR conditions to continue through tonight. Clouds gradually lower Saturday morning, with MVFR cigs moving in ahead of the rain around 12-13Z. Cigs and vis will continue to deteriorate to IFR Saturday afternoon as rain starts to increase. Southerly winds will increase steadily overnight tonight with gusts of 17-22kt by Saturday morning. Strengthening southerly winds aloft will also create low-level wind shear starting Saturday morning and continue through most of the day until the front moves through Saturday evening. Expect improving conditions Saturday evening behind the front.

HUN WATCHES/WARNINGS/ADVISORIES. AL . NONE. TN . NONE.

NEAR TERM . 17 SHORT TERM . 17 LONG TERM . 25 AVIATION . McCoy

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 mi36 minESE 810.00 miMostly Cloudy52°F32°F47%1029.1 hPa

Link to 5 minute data for K8A0

Wind History from 8A0 (wind in knots)
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Last 24hr--NE9
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1 day agoSW6SW7S5CalmSW4W7CalmS3NW4N6N5N7NE5N9N9
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2 days agoS3S4S4SW4S3CalmS4CalmCalmS3CalmS3SW4S3S4S5SW6W14SW7W11W8SW4SW5SW3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Huntsville, AL (19,4,5,8)
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Ground Weather Radar Station Northern Alabama
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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 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 numerous 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.