Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Pell City, AL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:59AMSunset 7:24PM Tuesday April 25, 2017 7:38 AM CDT (12:38 UTC) Moonrise 5:41AMMoonset 6:39PM Illumination 0% Phase: New Moon; Moon at 29 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 Pell City, AL
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location: 33.61, -86.29     debug


Area Discussion for - Birmingham, AL
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Fxus64 kbmx 251157
afdbmx
area forecast discussion
national weather service birmingham al
657 am cdt Tue apr 25 2017

Update
For 12z aviation.

Short term
Today and tonight.

Behind a departing upper-level trough to our east, a transient
surface to 500 mb ridge axis will move across the forecast area
today. This will coincide with fair weather conditions and a warming
trend. Afternoon highs should range from 80 to 85 degrees for most
locations. Weak southerly flow will develop late tonight in response
to a trough moving into the southern plains. Lows in the 50s are
expected under mostly clear skies.

87/grantham

Long term
Wednesday through Tuesday.

Upper level ridging is in place over central al on Wednesday as a
longwave trough digs into the southern great plains. A surface low
near the base of the trough moves northeastward into the great lakes
region on Wednesday and stretches a cold front down through the
ozarks, and a line of storms will develop along the front through
the mississippi river valley. This line of storms will push through
mississippi during the overnight hours Wednesday night and approach
or enter central al after midnight and into the early morning hours
of Thursday. This is why the latest SPC day 2 outlook includes
portions of our western counties under a marginal risk for
Wednesday. There is still uncertainty on exactly have far east the
line of storms makes it during the overnight hours and into Thursday
morning. Currently, the forecast has the line pushing through much
of central al during the morning, which limits the surface
instability. However, 1500+ j/kg elevated instability exists with
sufficient deep-layer shear to support organized strong to severe
storms. Mid-level lapse rates are 6.5-7 c/km and dcape in excess of
1000 j/kg could lead to a hail and damaging wind threat. If the line
of storms slows, some of our far eastern and southeastern counties
could see some increased surface-based instability during the late
morning to early afternoon. If this occurs, backed surface winds
produce wind profiles that could support an isolated tornado threat.

Confidence is low that this would occur because current models are
showing the line pushing out of our area by 8-10am. Will include a
low confidence severe threat in the hwo for Thursday, which will
cover both the SPC day 2 and day 3 outlooks as the valid times of
the outlooks split central al. The main threat will be damaging
winds and hail, but an isolated tornado can't be ruled out if there
are any breaks or bowing segments in the line of storms. Along with
the severe threat, pwats are above the climatological MAX for this
time of year, so expect this line of storms to produce heavy
rainfall.

The cold front stalls across central al towards the end of the day
Thursday and into Friday before being lifted northward as a warm
front in the afternoon on Friday. This could produce some scattered
thunderstorms during peak heating on Friday in our northern
counties. Another longwave trough digs into the central us Friday
as a surface low develops over the southern plains and tracks
northeastward into the upper midwest over the weekend. Models have
been going back and forth on the timing as a cold front stretches
down through the mississippi river valley and pushes eastward
across central al. Current runs have front pushing through Sunday
afternoon into Sunday night. The GFS has a shortwave pulse coming
out of the base of the trough, resulting in more shear. However,
the ECMWF doesn't have as much shear across central al. Therefore,
will only mention thunderstorms in the forecast for now and will
continue to monitor the severe potential in coming days.

Low level ridging builds in behind the frontal passage Monday night
into Tuesday, resulting in clearing skies, dry weather, and near-
normal temperatures.

25/owen

Aviation
12z TAF discussion.

Areas of low clouds and fog have developed across north central
alabama, impacting kbhm, kasn, kanb. The moisture layer is
shallow, and should burn off by 14z.VFR conds expected at all
sites after clouds/fog burn off. Sfc winds will become southwest
at 5-8 kts after 16z, then becoming southerly less than 5 kts
after 00z.

58/rose

Fire weather
Low stratus across the far east and patchy fog are possible
overnight this morning as an upper low pulls further away from
the area. Drier conditions are then expected through mid week
before moisture returns ahead of the next system Wednesday night
into Thursday. Critical fire weather conditions are not expected
at this time.

Preliminary point temps/pops
Gadsden 80 53 85 61 81 / 0 0 0 20 60
anniston 80 55 85 62 81 / 0 0 0 20 60
birmingham 82 58 86 66 81 / 0 0 0 30 60
tuscaloosa 83 57 85 63 82 / 0 0 0 60 50
calera 82 57 85 64 82 / 0 0 0 30 60
auburn 80 57 83 63 80 / 0 0 0 10 60
montgomery 85 58 87 65 85 / 0 0 0 20 60
troy 83 56 84 63 82 / 0 0 0 10 60

Bmx watches/warnings/advisories/
None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anniston Metro Airport, AL23 mi1.8 hrsSSW 410.00 miFair50°F50°F100%1008.7 hPa

Wind History from ANB (wind in knots)
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Last 24hr5Calm3N3W7W11SW3--W744N4CalmN9S4CalmCalmW4SW6S3SW3SW5SW4Calm
1 day agoCalmW3W9SW8W7SW6W7W7W10W10
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2 days agoW9SW8W8W4SW10S7SW7
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S7S9SW6W5CalmN5CalmW3NW4SW4SW3CalmCalmCalmCalm

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
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Birmingham, AL (8,2,3,4)
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Ground Weather Radar Station Birmingham, AL
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weather_mapweather_map weather_map

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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.