Sunday, September24, 2017

Marine Weather and Tides
Pass Christian, MS

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 6:45AMSunset 6:50PM Sunday September 24, 2017 7:13 AM CDT (12:13 UTC) Moonrise 10:46AMMoonset 9:57PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 416 Am Cdt Sun Sep 24 2017
Today..East winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tonight..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday..East winds near 10 knots becoming southeast in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday night..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms through the night.
Tuesday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms through the day.
Tuesday night..Southeast winds near 5 knots becoming northwest after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday..North winds 5 to 10 knots becoming southwest late in the afternoon. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday night..West winds 5 to 10 knots becoming north after midnight. Waves 1 to 2 feet. Dominant period 4 seconds.
Thursday..North winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Thursday night..North winds 10 to 15 knots. Waves 1 to 3 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 416 Am Cdt Sun Sep 24 2017
Synopsis..A large ridge of high pressure will continue to cover most of the eastern u.s. Through early next week. Weak easterly waves of lower pressure are expected to move across the northern gulf today, then high pressure is expected to rebuild over the central gulf coast region Monday through Wednesday. A cold front is expected to push through the region Thursday and Thursday night.

7 Day Forecast for Marine Location Near Pass Christian, MS
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location: 30.22, -89.11     debug

Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 240847
area forecast discussion
national weather service new orleans la
347 am cdt Sun sep 24 2017

Note to media and other interested parties... ASOS surface
observation transmission has returned to normal as of 0600z.

At the surface, high pressure centered over lake erie extends
southwest into east texas early this morning. Aloft, an upper
ridge is centered over the great lakes with a weak upper low
centered near pensacola. There are thunderstorms over the gulf
well to the south of pensacola and mobile, but only a few showers
over our coastal waters and st. Bernard parish at this time.

Temperatures at 3 am were generally in the upper 60s and lower 70s
away from marine influences.

Short term
Upper low will translate westward and be centered over the local
area by late this afternoon. The low will likely remain over the
area into at least part of Tuesday before shearing out. We have
already seen a bit of a moisture increase as precipitable water
values increased about 2 tenths of an inch from the regularly
scheduled 00z sounding to the special 06z (supporting nhc)
sounding. This will allow for more convective development,
particularly this afternoon and Monday afternoon. Driest area
today should be extreme northwest sections of the cwa, which
should see little or no precipitation. Most areas will see rain
chances in the 40-50 percent range today and tomorrow, tapering
off to 20-30 percent on Tuesday. High temperatures today and
tomorrow likely to be about 3 degrees cooler than Saturday in
most areas, but will recover some of that on Tuesday with somewhat
fewer clouds. 35

Long term
Ridging attempts to build back into the area Wednesday, but will
probably take most of the day to do it. Thursday will see the
area dominated by ridging and subsidence. With a sinking airmass
in place over the region, cloud development will be suppressed and
temperatures will warm. Do not expect to see much in the way of
convective activity due to the subsidence and a mid-level cap,
and only have a pop of 5 to 10 percent in the forecast both days.

Highs should climb into the lower 90s both Wednesday and

The ridge should break down Thursday night and Friday as a strong
long wave trough dives into the midwest. This trough will send an
attendant cold front through the area Friday into Friday night.

This front looks to be fairly moisture starved as northerly flow
and lower precipitable water values linger over the region. As
a result, have a mostly dry forecast in place for Friday. At most,
some isolated showers and thunderstorm may try to develop along
the louisiana coast and offshore as the front moves through. By
Saturday, the front should be well offshore allowing a cool, dry,
and very stable airmass to advect in from the north. High
temperatures should fall into the lower to middle 80s for the
weekend. Overnight lows could even dip into the upper 50s across
the northern third of the CWA Saturday night. Have trended
somewhat closer to the ECMWF solution on lows for Saturday and
Sunday. 35

Vfr conditions are expected to prevail through the early morning
hours as most TAF airports had relative humidity still down around
90% or less with a few airports observing a light north to northeast
wind as of 3 am. Any light fog with vsbys of 3 to 6 nm should remain
very isolated, and there is less haze in the region since most
observations are reporting vsby near 10 sm. Isolated to scattered
shra tsra are expected to start out near coastal areas this morning,
then develop spread inland across southeast louisiana and south
mississippi this afternoon. Brief MVFR to ifr will occur with
convection, but will keep prevailingVFR conditions in the forecast
through this evening. There appears to be a better chance of patchy
fog late tonight into early Monday morning, so will likely carry
MVFR category vsbys in some tafs for the latter portion of the
forecast. 22 td

A large ridge of high pressure currently covering most of the
interior eastern u.S. Is expected to persist through early next
week. The pressure gradient is expected to remain a bit stronger
today and tonight as minor low level surface wave features in the
easterlies (inverted troughs) move west across the northern gulf.

This pattern will continue to support easterly winds in the 10 to 15
knot range across most waters with seas of 2 to 4 feet.

High pressure is expected to rebuild back into the central gulf
coast region again Monday through Wednesday while hurricane maria
moves very slowly northward off the southern to mid atlantic coast.

This will result in a weaker pressure gradient and return to lighter
winds that are variable in direction and flatter seas across the
central gulf coast region. A cold front is then expected to push
through the region Thursday into Thursday night which will bring
rising northerly winds and higher seas offshore. 22 td

Decision support
Ss code: green.

Deployed: none.

Activation: none.

Activities: 06z 18z special upper air soundings ufn.

Decision support services (dss) code legend
green = no weather impacts that require action.

Blue = long-fused watch, warning, or advisory in effect or
high visibility event.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support.

Orange = high impacts; slight to moderate risk severe; nearby
tropical events; hazmat or other large episodes.

Red = full engagement for moderate risk of severe and or
direct tropical threats; events of national significance.

Preliminary point temps pops
Mcb 89 69 88 68 40 20 40 20
btr 91 70 90 70 30 20 40 20
asd 89 71 88 70 40 30 50 20
msy 89 75 88 73 40 30 50 20
gpt 87 72 86 71 50 40 50 30
pql 87 70 88 69 50 40 50 30

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 14 mi43 min NNE 6 G 8.9 72°F 82°F1013.7 hPa
OSTF1 - Stennis Test Facility 28 mi83 min Calm G 1.9 69°F 1013.8 hPa (+0.0)67°F
DKCM6 - 8741501 - Dock C, Pascagoula, MS 30 mi43 min NE 7 G 8.9 73°F 1013.5 hPa
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 31 mi43 min 82°F
PTBM6 - 8741003 - Petit Bois Island, MS 32 mi43 min ENE 13 G 15 78°F 1014.2 hPa
ULAM6 - 8741041 - Dock E. Port of Pascagoula, MS 33 mi43 min 85°F
RARM6 - 8741094 - Range A rear, Pascagoula, MS 33 mi43 min NE 7 G 9.9 72°F 1013.2 hPa
SHBL1 - 8761305 - Shell Beach, LA 38 mi43 min NNE 12 G 14 79°F 85°F1013.2 hPa
GDXM6 - Grand Bay Reserve, MS 38 mi88 min NNE 5.1 74°F 1014 hPa70°F
KATA1 - Katrina Cut, AL 48 mi73 min ENE 12 79°F 1013.2 hPa (+0.3)

Wind History for Gulfport Outer Range, MS
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gulfport - Gulfport-Biloxi International Airport, MS13 mi20 minNNE 39.00 miFair70°F66°F90%1013.6 hPa
Keesler Air Force Base / Biloxi, MS18 mi17 minNE 810.00 miFair70°F67°F91%1014.1 hPa
Bay St. Louis, Stennis International Airport, MS21 mi18 minENE 47.00 miFair68°F66°F94%1013.9 hPa

Wind History from GPT (wind in knots)
Last 24hr--------E8--------------------------N4NW3N3NW4N3N4
1 day agoN3N3NE4E3NE4CalmS6S11S4------------------------------
2 days agoN3CalmN444NE75SW3S7S7CalmCalmCalmNW3CalmCalmCalmCalmN3CalmN3NW3CalmCalm

Tide / Current Tables for Cat Island, Mississippi
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Cat Island
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Sun -- 01:23 AM CDT     1.80 feet High Tide
Sun -- 06:45 AM CDT     Sunrise
Sun -- 10:45 AM CDT     Moonrise
Sun -- 11:37 AM CDT     0.82 feet Low Tide
Sun -- 06:50 PM CDT     Sunset
Sun -- 09:57 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Ship Island, Mississippi Sound, Mississippi
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Ship Island
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Sun -- 01:02 AM CDT     1.90 feet High Tide
Sun -- 06:45 AM CDT     Sunrise
Sun -- 10:45 AM CDT     Moonrise
Sun -- 10:59 AM CDT     0.87 feet Low Tide
Sun -- 06:49 PM CDT     Sunset
Sun -- 09:56 PM CDT     Moonset
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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southeast    EDIT

Wind Forecast for New Orleans/Baton Rouge, LA (8,2,3,4)
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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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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 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 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.