Friday, April20, 2018 L-36.com


Marine Weather and Tides
Sterrett, AL

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:08AMSunset 7:23PM Friday April 20, 2018 3:28 PM CDT (20:28 UTC) Moonrise 9:57AMMoonset 12:00AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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 Sterrett, AL
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location: 33.41, -86.48     debug


Area Discussion for - Birmingham, AL
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Fxus64 kbmx 201847
afdbmx
area forecast discussion
national weather service birmingham al
147 pm cdt Fri apr 20 2018

Short term
Tonight.

Not much has been needed as of changes to both the short and long
term forecast this afternoon, just a few tweaks here and there.

The overall timing and discussion remains in tact for the long
term, so will not make any changes there.

As for tonight, winds will decrease overnight and will become
negligible in most locations. With clear skies and calmer winds,
look for some pretty good radiational cooling for the well
protected areas and colder valleys. Have made adjustments at these
locations downward a few additional degrees for the night. The
majority of the area will be in the 40s, but those cooler
locations will most likely get into the upper 30s, with even a
few spots in the mid 30s. The coldest spots may see some frost at
their location, but it will be few and far between, so an advisory
will not be issued.

16

Long term
Saturday through Thursday (issued at 354 am).

One last dry day is expected Saturday ahead of the approaching
upper low as the flow aloft becomes southwesterly. Southeasterly
flow will result in an increase in low-level moisture and
associated clouds, and high clouds are expected as well, but mid-
levels will remain too dry for precipitation. Easterly winds
associated with high pressure extending from the great lakes to
the mid-atlantic will prevent significant warming, but still
expect pleasant highs in the low to mid 70s. This will be the day
to get any outdoor activities done this weekend. The upper low and
associated weak surface low will move towards the ok ar border
region Saturday night. A warm front will lift northward over the
arklamiss region, while further east the warm front will remain
near the gulf coast. The heavier precipitation should remain west
of the forecast area prior to sunrise. But height falls ahead of
the system, strongly diffluent flow associated with the left exit
region of a strong upper-level jet streak on the southwest flank
of the upper low, and low and mid-level isentropic lift should
result in scattered showers developing over central alabama after
midnight as the LLJ strengthens. Increased cloudcover will result
in milder low temperatures.

The upper low and weak surface low will move slowly eastward,
reaching the arklamiss region Sunday afternoon and west alabama
late Sunday night. Plentiful gulf moisture and forcing for ascent
will result in widespread precipitation moving in from the west
during the day, potentially in the form of a weak mcs. Models
continue to trend slightly further north with the placement of the
warm front, as the east coast surface high position does not look
favorable for a strong cad wedge to develop during this timeframe.

It's possible that the warm front could make it up towards the us
80 corridor late Sunday afternoon. But the widespread
precipitation will inhibit the northward progress of the warm
front and associated destabilization, as well as the potential for
coastal convection. Couldn't rule out a couple stronger storms in
our extreme southwest counties, but this will likely be west of
the main LLJ axis in an area of weaker low-level shear, so severe
potential remains too low to mention in the hwo at this time.

Widespread precipitation will continue over much of the area
Sunday night, decreasing in coverage over the southwest counties
as a mid-level dry slot moves in. Storm-total area average
rainfall amounts of around 1.5-2.5 inches are expected across the
western two-thirds of the area, while rainfall amounts over 3
inches are expected in east alabama as the system slows down
Sunday night. These are areas that received the least amount of
rainfall last weekend, and streamflows are not elevated there.

Overall expect minor flooding of poor drainage areas and
additional rises on area streams and rivers, but confidence in
widespread flash flooding is too low to mention in the hwo at this
time.

The upper level low and associated cold core aloft will be located
overhead on Monday, while the weak surface low will be located
over SE al SW ga. The mid-level dry slot will be over most of the
area, except perhaps the northeast counties. This will result in
lighter rainfall rates, but still expect good coverage of showers
as a moist easterly flow wraps around the low pressure and a wedge
develops. Couldn't rule out a couple rumbles of thunder in the
southeast counties closer to the surface low due to the cool air
aloft. Models are trending a bit more progressive with the upper
low during the Monday night Tuesday timeframe as a southern stream
shortwave gives it a push. But clouds will still mainly stick
around with continued chances for showers drizzle. The low finally
lift away as an open wave Tuesday night ahead of a strong
shortwave. There are some timing differences in the models by this
point, with a cold frontal passage somewhere in the
Wednesday Thursday timeframe, but moisture return looks limited
ahead of this front.

32 davis

Aviation
18z TAF discussion.

Vfr through the period. As the high pressure slides northeast winds
will begin to switch to an eastern flow then southeast flow by
15z Saturday. Winds will calm tonight only to increase to 10 to
15kts by 15z.

16

Fire weather
A dry airmass will remain in place overnight and will be the main
contributing factor no fog development through the morning.

Afternoon rh values will fall to or below 30 percent Saturday
afternoon, for portions of the area. Northeast to east 20ft winds
remain below 10mph. Critical fire weather conditions are not
expected to be met. Rain chances return Saturday night, with
widespread rainfall on Sunday into Sunday night.

Preliminary point temps pops
Gadsden 38 73 52 64 54 0 0 30 90 100
anniston 40 73 53 66 55 0 0 30 90 100
birmingham 46 75 56 66 56 0 0 30 100 90
tuscaloosa 46 76 57 69 57 0 0 50 100 70
calera 46 75 56 67 57 0 0 30 100 90
auburn 47 73 55 66 58 0 0 30 90 100
montgomery 47 77 58 71 60 0 0 40 100 90
troy 48 76 57 71 60 0 0 40 100 90

Bmx watches warnings advisories
None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Birmingham, Birmingham International Airport, AL18 mi36 minE 910.00 miFair68°F30°F24%1025.8 hPa
Alabaster, Shelby County Airport, AL22 mi36 minno data10.00 miFair69°F37°F31%1024.6 hPa

Wind History from BHM (wind in knots)
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Last 24hrN12
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1 day agoSW14
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2 days agoSW14
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G24

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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GOES Local Image of    EDIT
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.
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Wind Forecast for Birmingham, AL (16,3,4,5)
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Ground Weather Radar Station Birmingham, AL
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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.