Saturday, January23, 2021
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Marine Weather and Tides
Gadsden, AL

Version 3.4
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8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:44AMSunset 5:07PM Saturday January 23, 2021 1:18 AM CST (07:18 UTC) Moonrise 1:50PMMoonset 3:18AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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 Gadsden, AL
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location: 34.02, -85.99     debug


Area Discussion for - Birmingham, AL
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FXUS64 KBMX 230443 AFDBMX

Area Forecast Discussion National Weather Service Birmingham AL 1043 PM CST Fri Jan 22 2021

UPDATE. For 06Z Aviation.

SHORT TERM. /Updated at 0814 PM CST Fri Jan 22 2021/

Satellite imagery early this evening depicts the cloud/clearing line generally just south of I-20, aligned east west. Patchy ground fog has developed in this area. Some of the fog is lifting high enough to knock the visibilities below one mile at times. Expect additional fog development as the clearing line slowly migrates southward this evening.

The challenge comes in how long the fog last, how widespread it becomes and if any develops upstream in the north. The latest model solutions and surface observations have no fog north. There appears to some surface dry advection occurring as lower dew points are inching southward. Will go with the idea that some dense fog will develop and will have varying affects as to how high it can develop. Additionally, expect the surface dew point depression to gradually increase overnight. Will add mention in the HWO for the visibilities below 1 mile at times, but overall duration may be only 2-4 hours. Will continue to monitor the clearing line and how the lower dew points affect the fog development.

75

Previous short-term discussion: /Updated at 1125 AM CST Fri Jan 22 2021/

Broad mid-level ridging begins to build over the Southern Plains tonight and tomorrow. The result will be gradually decreasing clouds from north to south this evening. Lingering shower activity will persist across the southern/southeast counties through early evening as a weak surface boundary remains stretched from west to east near the U.S. Highway 80 corridor.

By tonight, the weak front should be positioned roughly along the Northern Gulf Coast region with fair skies across all but the far southern counties. Weak cool air advection and good radiational cooling will allow our far northern counties to experience a light freeze overnight. Temperatures elsewhere look to range from the lower 30s near the I-20 corridor to the low 40s south of the I-85 corridor. Patchy fog will be possible across the southern third of the forecast area overnight into early Saturday morning due to the recent rainfall and weak cool air advection.

Patchy morning fog south will give way to fair skies areawide during the day on Saturday with highs ranging from the lower 50s northeast to the low 60s southeast.

05

LONG TERM. /Updated at 0208 PM CST Fri Jan 22 2021/

Saturday night through Thursday.

A stalled out frontal boundary will lift northward late Saturday night and Sunday. There will be increasing chances for showers Sunday night and Monday, mainly for areas north of I-20, in vicinity of warm front. A few elevated storms possible far north, but nothing severe. Unseasonably warm temperatures on Monday as the Gulf moisture flows unabated northward. Scattered showers will develop in the morning hours with increasing coverage of rain in the afternoon as large scale ascent overspreads the area. Models are depicting favorable bulk shear and helicity values for convective development, but weak 0-3km lapse rates and minimal upper height falls will limit vertical growth of thunderstorms. Short wave trof will not be able to provide enough forcing to overcome warm layer centered around 700mb. The rain will end across the area late Monday night as a cold front pushes through the area. The front will stall near the coast and stronger short wave trof will bring rain back into Alabama on Wednesday. The low level warm front will likely stay south of I-20, so better rain chances will be across the southern counties.

58/rose

Previous long-term discussion: /Updated at 0344 AM CST Fri Jan 22 2021/

Saturday night through Thursday.

An old front stalled near the Gulf Coast will move northward as a warm front Saturday night and Sunday in advance of the next storm system, but the atmosphere may be too dry for any rain through Sunday morning. However, warm advection and isentropic lift are expected to strengthen Sunday afternoon in the 850-700mb layer. This will probably lead to shower development mainly across our north and west. This potential is bit uncertain due to the amount of deep- layer anticyclonic curvature and tendency for subsidence to somewhat offset the isentropic lift.

A shortwave is projected to track from the Texas Panhandle to Illinois on Monday with a warm sector spreading inland across the Deep South. The main area 500 mb vorticity with this system is expected to be compact and remain several hundred miles our northwest, while a subtropical ridge remains in place near Cuba. Parameters appear supportive of severe weather, but a lack of lift across the warm sector may significantly hinder this potential. This is supported by a lack of height falls, anticyclonic curvature at 500 mb, and the shortwave greatly displaced to the northwest. At this time, we will refrain from including severe storms from our forecast.

Showers with embedded thunder will move across the region Monday afternoon and evening as the weakening front loses momentum and eventually stalls to our south. Another shortwave should induce southerly flow on Wednesday leading to isentropic lift north of the warm front near the Gulf coast. Rain could become widespread across the region Wednesday and continue through early Thursday.

87/Grantham

AVIATION. 06Z TAF Discussion.

Flight restrictions have pushed southward and are generally near MGM/TOI. This coincides close to the cloud/clearing line. Near the back edge of the clearing line, brief MIFG/fg has develop in spots. These locations appear to be near water sources and cooler locations. There are some light northerly winds behind this clearing line and drier air too, therefore this should hold the fog to a short duration. Otherwise, improving conditions south and VFR on Saturday. Winds will start off light from the north and veer to the east northeast 5-10kts on Saturday. Some mid level VFR ceilings may intrude at the tail end of the period.

75

FIRE WEATHER.

A weak cold front between I-20 and I-85 will continue to sink slowly southward overnight. Skies will gradually clear from north to south overnight as drier air moves in behind the front. Due to the cloud cover and moist conditions across Central Alabama during the day Friday, fog will likely develop tonight for areas north of I-85. No rain expected Saturday or Saturday night along with lower humidity levels. Moisture will increase Sunday and into Monday as as a warm front lifts northward. Unseasonably warm and humid on Monday with numerous showers and a chance of storms.

PRELIMINARY POINT TEMPS/POPS. Gadsden 29 54 37 56 48 / 0 0 10 40 80 Anniston 31 58 39 58 52 / 0 0 10 40 70 Birmingham 33 56 42 58 54 / 0 0 10 50 70 Tuscaloosa 34 58 42 61 56 / 0 0 10 50 60 Calera 34 57 42 59 55 / 0 0 10 40 60 Auburn 36 58 42 56 54 / 10 0 10 20 30 Montgomery 39 59 45 63 58 / 10 0 10 20 30 Troy 43 61 47 63 58 / 20 10 10 10 20

BMX WATCHES/WARNINGS/ADVISORIES/. None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gadsden, Gadsden Municipal Airport, AL6 mi22 minN 510.00 miFair38°F33°F83%1021.3 hPa
Albertville, Albertville Municipal Airport, AL20 mi43 minNNE 510.00 miFair37°F32°F81%1020 hPa

Link to 5 minute data for KGAD

Wind History from GAD (wind in knots)
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Last 24hrN3CalmCalmCalmCalmN3CalmN4N3CalmE3Calm5N4N4NW4NW3CalmN6CalmCalmNE4CalmN5
1 day agoCalmCalmCalmCalmSW3CalmCalmCalmCalmCalmS3CalmW3W4NW3W3N3N3CalmCalmCalmCalmCalmCalm
2 days agoNW5NW5W4W5NW4W3CalmN5N6NW6CalmNW4W4W6W6W3CalmCalmCalmCalmCalmSW3S3Calm

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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.