Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Dauphin Island, 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 6:20AMSunset 7:29PM Saturday August 19, 2017 12:38 AM CDT (05:38 UTC) Moonrise 4:00AMMoonset 6:00PM Illumination 10% Phase: Waning Crescent; Moon at 27 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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GMZ630 Northern Mobile Bay- 1008 Pm Cdt Fri Aug 18 2017
Rest of tonight..West winds 3 to 8 knots becoming northwest. Smooth to a light chop. Slight chance of showers and Thunderstorms.
Saturday..Northwest winds 3 to 8 knots becoming west. Smooth to a light chop. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Saturday night..Southwest winds 3 to 8 knots becoming light. Smooth to a light chop becoming smooth. Chance of showers and Thunderstorms in the evening.
Sunday..Winds light becoming southeast 3 to 8 knots. Smooth. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Sunday night..South winds 3 to 8 knots becoming light. Smooth to a light chop becoming smooth.
Monday..East winds 3 to 8 knots becoming southeast 5 to 10 knots. Smooth to a light chop. Chance of showers and Thunderstorms.
Monday night..Southeast winds 3 to 8 knots. Smooth to a light chop. Chance of showers and Thunderstorms.
Tuesday..Southeast winds 3 to 8 knots. Smooth to a light chop. Chance of showers and Thunderstorms.
Tuesday night..Southwest winds 3 to 8 knots. Smooth. Slight chance of showers and Thunderstorms.
Wednesday..West winds 3 to 8 knots. Smooth. Chance of showers and Thunderstorms.
Wednesday night..West winds 3 to 8 knots. Smooth to a light chop. Chance of showers and Thunderstorms.
GMZ600 Synopsis For Destin Fl To Pascagoula Ms Out 60 Nm Including Mobile Bay- 1008 Pm Cdt Fri Aug 18 2017
Synopsis..Weak surface high pressure continues across the northern gulf of mexico through Saturday, leading to a persisting pattern of light northwest flow during late night and morning hours and southwest flow during afternoon hours. High pressure builds west from the western atlantic into the southeast u.s. Sunday into early next week, with local winds becoming more east to southeasterly as a result. Little change in seas expected. Winds and seas higher in and around showers and storms through the period.

7 Day Forecast for Marine Location Near Dauphin Island, AL
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location: 30.25, -88.08     debug


Area Discussion for - Mobile/Pensacola, FL
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Fxus64 kmob 190454 aac
afdmob
area forecast discussion... Updated
national weather service mobile al
1154 pm cdt Fri aug 18 2017

Discussion Updated for latest aviation discussion below.

Aviation
06z issuance... GeneralVFR conditions expected through most of the
night, with favored locations seeing visby drops into MVFR levels
closer to sunrise. Another round of shra tsra are expected to
develop offshore, then develop inland during the day. Local drops
to MVFR levels likely in the storms, along with possible winds
gusts to 30 knots in the stronger storms are possible during the
afternoon early evening hours.

16

Prev discussion issued 1019 pm cdt Fri aug 18 2017
discussion... See updated information for land areas below.

Update... Afternoon package cleaned up to remove evening precip,
with nothing showing on radar attm. Am still expecting shra tsra
to develop after midnight, so have left in. Everything out
shortly.

16
prev discussion... Issued 624 pm cdt Fri aug 18 2017
discussion... Updated for latest aviation discussion below.

Aviation...

00z issuance... Early evening activity will bring local drops and
cigs to MVFR levels. Strong thunderstorm outflow of 30kts+ have
been in evidence with the stronger storms. These storms have been
isolated as they move sse at around 15 knots. With the setting
sun, coverage and intesity will decrease, with patchy fog
developing over preferred areas inland overnight. Another round
of tsra development is expected Saturday afternoon, with scattered
coverage and a few strong storms.

16
prev discussion... Issued 333 pm cdt Fri aug 18 2017
near term now through Saturday ... Current radar and satellite
observations indicate isolated to scattered showers and
thunderstorms developing across southeast mississippi and the
immediate coast this afternoon amidst a healthy summertime cu
field. This activity is expected to continue into the early
evening hours before tapering off after sunset, with storm motion
remaining slow and generally from northwest to southeast. The
heavier cells could be capable of producing locally heavy
rainfall, gusty winds, and frequent lightning. Outside of showers
and storms, surface obs are showing temps a few degrees above
expected this afternoon, particularly along the coast where weak
northwest flow is inhibiting the inland sea breeze propagation.

Heat indices are generally running in the 100 to 105 degree range.

Remember to bring water and sunscreen if working or planning
activities outdoors, and take frequent breaks in shade or a c.

A weak upper-level trough extending from the central caribbean north
over the florida peninsula pushes northwest into the southern and
central gulf through the remainder of the near term. In response to
this shift, the area of high pressure currently over the northern
gulf pushes west over texas, though ridging over the western
atlantic will continue to nose west over the northeastern fringe of
our local area. Meanwhile at the surface, weak high pressure
persists over the northern gulf, maintaining the current pattern of
northwesterly flow Saturday morning shifting to more southwesterly
during the afternoon. Precipitable water remains below seasonal
during this time over interior southern alabama, where models
indicate pwats down around 1.5 inches. This, coupled with weak
subsidence beneath the aforementioned upper ridge nosing in from the
east, should limit convective activity over these areas Saturday,
with only a slight chance in place for a few isolated cells to form.

That said, have kept higher (chance) pops along the coast and over
the southwestern third of the forecast area during the day Saturday,
where pwats are expected to remain closer to 2.00 inches and the
approaching inverted trough over the central gulf will lend a
supportive hand in getting more scattered thunderstorm activity
going.

In terms of temperature, expect more of the same tonight and
tomorrow. Lows will range from low to mid 70's inland to upper 70's
along the immediate coast. Highs reach the low to mid 90's areawide,
with heat indices once again reaching around 100 to 105 degrees.

49
short term Saturday night through Monday night ... An upper
trough will move westward across the central gulf through the
weekend. Meanwhile, a weak front will gradually wash out across
the region through the weekend. As the upper trough moves into
the western gulf on Monday, moisture levels will increase across
the area with precipitable water values climbing back above 2
inches. This will maintain scattered showers and thunderstorms
over the weekend with slightly higher chances on Monday as
moisture levels increase. Highs remain in the low to mid 90s with
heat index values between 102-107 in most areas. 13
long term Tuesday through Friday ... An upper trough will move
from the upper midwest on Tuesday through the northeast by
Friday. This will send another front southward toward the area by
the end of the week. A typical august pattern of daily, mostly
afternoon and early evening, scattered showers and thunderstorms
can be expected through midweek with chances increasing late in
the period as the frontal boundary sinks southward. Heavy rain and
frequent lightning will be the main threats. A few isolated
storms could become strong and produce gusty winds. Highs will
continue in the low 90s with lows in the mid and upper 70s. 13
marine... Weak surface high pressure persists over the northern gulf
into the weekend, continuing the pattern of northwesterly flow
during morning hours and southwesterly flow during afternoon hours
today through late Saturday. Heading into Sunday, high pressure
begins to ridge westward from the western atlantic into the
southeastern u.S., leading to a shift in surface flow to more east
to southeasterly Sunday into early next week. Seas remain around a
foot over the weekend before increasing to around 2 feet early to
mid next week. Locally higher winds and seas can be expected in and
around showers and thunderstorms through the period, as well as
frequent lightning and reduced visibilities due to heavy rainfall in
stronger cells. 49

Mob watches warnings advisories
Al... None.

Fl... None.

Ms... None.

Gm... None.

This product is also available on the web at:
http: weather.Gov mob


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPIA1 - Dauphin Island, AL 0 mi38 min W 5.1 G 6 81°F 1015.6 hPa (-0.0)
FMOA1 - 8734673 - Fort Morgan, AL 3 mi50 min W 5.1 G 6 83°F
CRTA1 - Cedar Point, AL 5 mi68 min W 6 84°F 1015.9 hPa
KATA1 - Katrina Cut, AL 7 mi68 min W 4.1 83°F 1015.9 hPa
MBLA1 - Middle Bay Light, AL 13 mi98 min WNW 6 82°F 1015.2 hPa (-0.7)
WKXA1 - Weeks Bay Reserve, AL 18 mi113 min 76°F 75°F
WBYA1 18 mi50 min 84°F
GDXM6 - Grand Bay Reserve, MS 20 mi113 min NNW 4.1 79°F 1017 hPa74°F
PTBM6 - 8741003 - Petit Bois Island, MS 23 mi50 min NW 5.1 G 6 81°F 1016.8 hPa
RARM6 - 8741094 - Range A rear, Pascagoula, MS 24 mi50 min NNW 2.9 G 4.1 78°F 1015.5 hPa
ULAM6 - 8741041 - Dock E. Port of Pascagoula, MS 24 mi50 min 87°F
DKCM6 - 8741501 - Dock C, Pascagoula, MS 27 mi50 min NNW 2.9 G 4.1 78°F 1015.8 hPa
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 27 mi56 min 83°F
MCGA1 - 8736897 - Coast Guard Sector Mobile, AL 28 mi50 min N 1.9 G 2.9 80°F 86°F1016.6 hPa
PPTA1 28 mi68 min NW 1.9 80°F 1015.9 hPa
PTOA1 29 mi50 min 80°F 74°F
MHPA1 - Meaher Park, AL 30 mi38 min NNE 1 80°F 1016.3 hPa (+0.3)
42012 - Orange Beach AL Buoy 31 mi48 min NW 7.8 G 9.7 85°F 87°F1 ft1015.2 hPa (+0.0)75°F
OBLA1 - 8737048 - Mobile State Docks, AL 32 mi56 min 80°F 86°F1015.9 hPa
PCLF1 - 8729840 - Pensacola, FL 47 mi56 min 80°F 87°F1015.8 hPa

Wind History for Dauphin Island, AL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sonny Callahan Airport, AL18 mi43 minN 010.00 miFair75°F75°F100%1015.9 hPa
Jack Edwards Airport, AL22 mi63 minN 010.00 miFair75°F75°F100%1015.6 hPa

Wind History from CQF (wind in knots)
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Last 24hrW4CalmW4W3W3W3NW4NW4NW5NW5N5N5NW4CalmSW9SW3W5W3E5CalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmN3NW3CalmCalmSW5S4S3SW6SW6SW3CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmW3SW3SW5SW4W4SW3SW5S5W3SW5CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Dauphin Island, Mobile Bay, Alabama
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Dauphin Island
Click for Map
Sat -- 04:00 AM CDT     Moonrise
Sat -- 06:21 AM CDT     Sunrise
Sat -- 08:51 AM CDT     1.67 feet High Tide
Sat -- 05:59 PM CDT     Moonset
Sat -- 07:29 PM CDT     Sunset
Sat -- 08:51 PM CDT     -0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.40.60.811.21.41.61.61.71.61.51.41.10.90.70.50.30.10-0-0-00.1

Tide / Current Tables for Mobile Bay Entrance, Alabama Current
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Mobile Bay Entrance
Click for Map
Sat -- 04:00 AM CDT     Moonrise
Sat -- 04:01 AM CDT     2.15 knots Max Flood
Sat -- 06:21 AM CDT     Sunrise
Sat -- 10:04 AM CDT     -0.00 knots Slack
Sat -- 03:54 PM CDT     -2.27 knots Max Ebb
Sat -- 05:59 PM CDT     Moonset
Sat -- 07:29 PM CDT     Sunset
Sat -- 10:20 PM CDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.61.92.12.12.11.91.61.20.60-0.6-1.1-1.6-2-2.2-2.3-2.2-1.9-1.6-1.2-0.7-0.20.3

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Mobile/Pensacola, FL (1,6,7,8)
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Ground Weather Radar Station Mobile, AL
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weather_mapweather_map weather_map

Gulf Stream Current


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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.