Friday, September21, 2018 L-36.com


Marine Weather and Tides
Gulfport, MS

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:43AMSunset 6:54PM Friday September 21, 2018 6:36 AM CDT (11:36 UTC) Moonrise 5:14PMMoonset 3:29AM Illumination 87% Phase: Waxing Gibbous; Moon at 11 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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GMZ532 Mississippi Sound- 225 Am Cdt Fri Sep 21 2018
Today..Southeast winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tonight..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Saturday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday night..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Sunday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Sunday night..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday..Southeast winds 10 to 15 knots. Waves 1 to 2 feet. Showers and Thunderstorms likely.
Monday night..Southeast winds 10 to 15 knots. Waves 1 to 2 feet. Chance of showers and Thunderstorms.
Tuesday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Showers and Thunderstorms likely.
Tuesday night..South winds 5 to 10 knots becoming southwest after midnight. Waves 1 to 2 feet. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 225 Am Cdt Fri Sep 21 2018
Synopsis..Increasing onshore flow will persist today through the upcoming weekend. This will support more widespread showers and storms, with better coverage in the overnight hours. Winds will remain light ranging 5 to 10 knots, but may be gusty upwards of 20 to 30 knots in any one stronger storm. Expect this pattern to persist into early next week. Klg


7 Day Forecast for Marine Location Near Gulfport, MS
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location: 30.36, -89.08     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 210842
afdlix
area forecast discussion
national weather service new orleans la
342 am cdt Fri sep 21 2018

Discussion
The upper level ridge that brought stifling hot weather with limited
convection is steadily moving further away from the region, now
centered over the carolinas. At the same time, a northern stream
trough is eroding the western side of the ridge, thus further
decreasing local subsidence. These changes can already be seen on
radar at 3 am lst. Isolated to scattered convection is moving inland
from the coastal waters. As typical with the current environment,
daytime heating will cutoff coastal region convection mid morning
before sparking inland thunderstorms. The changes in the upper
atmosphere mentioned above should translate to much higher coverage
today. Thinking on the order of 30 to 50% across the CWA this
afternoon. Generally speaking, higher rain chances should be on the
western side of the CWA as its further from the center of the upper
ridge. The main threat with storms today will be locally heavy
rainfall as pw's are over 2". Hail is unlikely with wbz close to
14kft but small pebbles not impossible with very strong updrafts.

However, yesterday's 00z sounding does show enough dry air aloft to
possibly support strong downdrafts. A svr warning is not too likely
but a few sps' wouldn't be much of a surprise.

The forecast through this weekend and through early next week will
basically be the same as today, albeit even higher pops. The ridge
to the E NE will gradually weaken to non-existence over the conus
while a weak inverted low tracks from florida to the north-central
gulf of mexico. These changes will be the main reasons for
convective enhancements. Daily rain chances should be in the 50-60%
range with isolated nightly showers.

Uncertainty increases from Wednesday onward. While models show a
broad upper level trough pushing south into the midsection of the
country, the southern extend of the base of the trough is yet to be
determined. The ECMWF never brings it far enough for a cold front to
push through. The GFS does, but just barely on Saturday and even
then it retrogrades back north by Sunday. Either solution should
keep rain chances elevated.

Meffer

Aviation
The area remains in a dominant onshore flow, bringing increased gulf
moisture across the area today. Latest night time microphysics
imagery shows some spotty low-level cumulus persisting, primarily
along coastal areas at around 2500 and 3500ft. Latest cam guidance
supports marine convection to persist early this morning, and
steadily increase and press inland towards hum, msy and new. In
these areas, flight categories of MVFR to ifr can be expected at
times, with periods of limited visibility and torrential rainfall.

More widespread scattered showers and storms can be expected later
today around noon, and lasting through the late afternoon to evening
hours where all terminals may experience temporary reductions in
flight categories. We will likely return to dry conditions later
tonight with widespreadVFR and perhaps some patchy fog, especially
north of i-10 i-12. Klg

Marine
Expect continued onshore flow for the rest of the day today, and
into the upcoming weekend with increased gulf moisture. This will
support more widespread showers and storms, with better coverage in
the overnight hours. Winds will remain light, ranging 5 to 10 knots,
but may be gusty upwards of 20 to 30 knots in any one stronger
storm. Waves are expected to range 1 to 2 feet, but may increase in
stronger convection. This pattern will continue into early next
week. Klg

Decision support
Dss code: green.

Deployed: none.

Activation: none.

Activities: none.

Preliminary point temps pops
Mcb 92 72 90 71 40 10 60 20
btr 91 73 91 72 50 10 60 30
asd 92 73 90 72 40 10 50 20
msy 91 76 90 75 50 10 60 30
gpt 90 75 88 73 30 10 50 20
pql 91 74 90 72 30 10 40 20

Lix watches warnings advisories
La... None.

Gm... None.

Ms... None.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 13 mi36 min 83°F 87°F1017.1 hPa (+0.6)
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 27 mi36 min 89°F
PTBM6 - 8741003 - Petit Bois Island, MS 32 mi36 min 83°F 1018.3 hPa (+0.5)
GDXM6 - Grand Bay Reserve, MS 35 mi51 min NE 1 82°F 1019 hPa77°F
KATA1 - Katrina Cut, AL 46 mi66 min S 4.1 85°F 1017.6 hPa
SHBL1 - 8761305 - Shell Beach, LA 46 mi36 min 82°F 91°F1017 hPa (+0.5)

Wind History for West Pier, Port of Gulfport, MS
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gulfport - Gulfport-Biloxi International Airport, MS3 mi1.7 hrsW 410.00 miMostly Cloudy79°F75°F88%1016.5 hPa
Keesler Air Force Base / Biloxi, MS10 mi1.7 hrsS 310.00 miFair83°F73°F73%1016.8 hPa

Wind History from GPT (wind in knots)
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Last 24hrCalmCalmN4E4SE5SE8SE10SE11S10
G16
SE11SE10S6SE8S6S5S6S7S4S5S3CalmCalmW4N3
1 day agoCalmCalmN4N44E5NE5SE9S9S8S6S6S4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3
2 days agoCalmNW3CalmN4CalmNW6W6S3S5S7S4W3CalmNE5CalmE3CalmS4S6CalmCalmCalmNW3NW3

Tide / Current Tables for Gulfport, Gulfport Harbor, Mississippi
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Cat Island, Mississippi
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (7,2,3,4)
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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.