Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Pass Christian, MS

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 6:53AMSunset 7:11PM Thursday March 23, 2017 5:10 PM CDT (22:10 UTC) Moonrise 3:54AMMoonset 2:56PM Illumination 14% Phase: Waning Crescent; Moon at 26 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- 343 Pm Cdt Thu Mar 23 2017
.small craft exercise caution in effect through Friday morning...
Tonight..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Friday..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Slight chance of showers.
Friday night..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms after midnight.
Saturday..South winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Showers and Thunderstorms likely.
Saturday night..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of Thunderstorms in the evening. Chance of showers through the night.
Sunday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..South winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Monday night..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Tuesday..South winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Tuesday night..Southeast winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 343 Pm Cdt Thu Mar 23 2017
Synopsis..A storm system developing in the great plains will produce strong onshore flow from this evening through the weekend.

7 Day Forecast for Marine Location Near Pass Christian city, 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 232124
afdlix
area forecast discussion
national weather service new orleans la
424 pm cdt Thu mar 23 2017

Synopsis
Latest surface analysis showed a stationary front extending from
a deep 996mb low over the central plains to northwest louisiana
to florida parishes to mississippi coastal waters. Surface flow
was generally southeast parallel to the frontal zone. Surface
dewpoint readings were in the mid to upper 50s northeast of the
boundary except mississippi coast with values in the lower 60s off
the sound. Dewpoint values were in the 60 to 67f southwest of the
boundary.

Upper air analysis showed a ridge axis from northeast gulf of
mexico to the great lakes region and developing closed low over
the four corners region. Isotach at 250mb initialized jet MAX of
130 knots on the base and front side of the wave/low.

Short term
Deep surface trough/low over the central plains will begin to dive
east southeast through Friday. Strong jet MAX off the southern
rockies will allow the system to entrain dry air. This will
tightened the moisture axis along the disturbance ahead of the
closed low. Surface base CAPE values will increase across the
west zones Friday afternoon with values 300 to 500 j/kg. However,
the most of the lift will occur Friday night into Saturday. As a
result, will maintain slight chance of convection Friday
afternoon.

Low level southeast to south flow and southwest flow aloft will
increase 0-3km helicity values 250 to 400 m/s Friday evening
through early Saturday mainly across the north half of the
forecast area. Isolated storms that will have a chance to yield a
tornado will likely occur when the initial convection moves east
into northwest zones around midnight Friday night. CAPE values do
increase with values of 700 j/kg across southwest mississippi to
1500 j/kg along the louisiana. With the upper level disturbance
rotating southeast through the forecast area Friday night a few
storms may contain damaging winds and hail. 500mb temps may dip
to -17f across northwest zones early Saturday behind the
disturbance. As a result, a few storms may contain hail. As for
now, damaging winds and hail storms are the main threat and
isolated tornadoes as a secondary threat due to the small timing
window.

Long term
With no true frontal passage over the weekend, low level moisture
will remain in play. However, mid layer moisture will be pushed
east provide a break on Sunday. A short wave will rake across the
north zones on Monday yielding a few storms, and few of these
storms could be strong but below severe limits.

Meanwhile in the latter part of the forecast, a very strong
system will approach the lower mississippi valley late Wednesday
into Thursday. While 7 to 8 days away, the pattern does support a
round of strong to severe across the forecast area late next week.

Aviation
Vfr conditions will continue at all of the terminals through 00z.

However, an area of MVFR ceilings around 2000 feet will begin to
advect into the area between 00z and 06z. Kgpt will see ceilings
develop closer to 00z while kbtr should see ceilings develop
closer to 03z. These ceilings should then persist through the
remainder of the forecast period. Southerly winds will also
increase by 12z tomorrow with sustained winds of 15 to 20 knots
and gusts over 25 knots possible. 32

Marine
Surface low will continue to deepen over the central plains and
tightened the pressure gradient. Will maintain small craft
exercise caution headlines for this evening. Winds are expected to
increase to 20 knots over extreme eastern waters after midnight.

The remainder of opening waters will see wind speeds increase to
20 to 25 knots on Friday. Will issue a small craft advisory to
cover this hazard. Mariners should also be aware of the potential
for one or more lines of thunderstorms to move through the waters
late Friday night into Saturday. Likely to be a prolonged period
of southeast or south winds over the waters through at least
midweek next week, outside of thunderstorms. 18

Decision support
Dss code... Blue.

Deployed... None.

Activation... None.

Activities... None.

Decision support services (dss) code legend
green = no weather impacts that require action
blue = long fused watch/warning/advisory in effect or high
visibility event
yellow = heightened impacts with short fused
watch/warning/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 tonight risk svr
and/or direct tropical threats; events of national
significance

Preliminary point temps/pops
Mcb 63 77 65 75 / 10 20 70 70
btr 64 80 67 78 / 10 20 70 60
asd 66 77 67 78 / 10 20 20 70
msy 66 79 68 78 / 10 20 20 70
gpt 67 75 66 73 / 10 20 10 70
pql 64 74 64 74 / 10 20 10 70

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 mi52 min ESE 14 G 16 70°F 71°F1022.4 hPa
42067 - USM3M02 27 mi90 min ESE 18 G 19 69°F 3 ft1022.9 hPa66°F
OSTF1 - Stennis Test Facility 28 mi80 min SE 3.9 G 7.8 76°F 1022.8 hPa (-1.0)65°F
DKCM6 - 8741501 - Dock C, Pascagoula, MS 30 mi52 min ESE 16 G 22 70°F 1022.8 hPa
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 31 mi52 min 70°F
PTBM6 - 8741003 - Petit Bois Island, MS 32 mi52 min E 14 G 19 69°F 1023.8 hPa
ULAM6 - 8741041 - Dock E. Port of Pascagoula, MS 33 mi52 min 70°F
RARM6 - 8741094 - Range A rear, Pascagoula, MS 33 mi52 min ESE 16 G 21 72°F 1022.7 hPa
SHBL1 - 8761305 - Shell Beach, LA 38 mi52 min E 13 G 16 73°F 76°F1022 hPa
GDXM6 - Grand Bay Reserve, MS 38 mi85 min ESE 17 71°F 1024 hPa64°F
KATA1 - Katrina Cut, AL 48 mi70 min ESE 18 1023.4 hPa (-0.7)

Wind History for Gulfport Outer Range, MS
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gulfport - Gulfport-Biloxi International Airport, MS13 mi77 minESE 167.00 miOvercast73°F64°F76%1022.5 hPa
Keesler Air Force Base / Biloxi, MS18 mi72 minSE 17 G 2110.00 miA Few Clouds74°F64°F72%1023 hPa
Bay St. Louis, Stennis International Airport, MS21 mi75 minESE 10 G 1610.00 miPartly Cloudy73°F60°F65%1022.7 hPa

Wind History from GPT (wind in knots)
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Last 24hrS8SW4SW5W5W4W3N7NE5NE4NE3NE6NE4NE5NE54NE5E7SE11E12E14E13
G21
SE12E14E16
1 day agoSW9SW6SW4SW4SW3CalmCalmW4W4W5W5W7W10W7NW8NW8N7NW9N10NW9
G15
NW8NW8N9
G16
S7
2 days agoSW8S11S6S6S7S44SW5SW4W3W3W4NW3CalmW3W4W4W8
G19
NW96S9S12
G18
S12
G16
S10
G18

Tide / Current Tables for Cat Island, Mississippi
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Cat Island
Click for Map
Thu -- 03:53 AM CDT     Moonrise
Thu -- 05:49 AM CDT     -0.15 feet Low Tide
Thu -- 06:56 AM CDT     Sunrise
Thu -- 02:55 PM CDT     Moonset
Thu -- 07:09 PM CDT     Sunset
Thu -- 08:12 PM CDT     1.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.50.30.1-0-0.1-0.1-0.1-00.10.20.40.50.60.80.911.11.11.21.21.21.11

Tide / Current Tables for Ship Island, Mississippi Sound, Mississippi
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Ship Island
Click for Map
Thu -- 03:52 AM CDT     Moonrise
Thu -- 05:11 AM CDT     -0.15 feet Low Tide
Thu -- 06:55 AM CDT     Sunrise
Thu -- 02:55 PM CDT     Moonset
Thu -- 07:09 PM CDT     Sunset
Thu -- 07:51 PM CDT     1.28 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.20-0.1-0.2-0.1-0.100.20.30.50.60.70.811.11.11.21.31.31.21.21

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 New Orleans/Baton Rouge, LA (18,4,5,8)
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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.