Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Pass Christian, MS

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:33PM Wednesday August 21, 2019 2:10 AM CDT (07:10 UTC) Moonrise 11:15PMMoonset 11:40AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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- 949 Pm Cdt Tue Aug 20 2019
Rest of tonight..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms through the night.
Thursday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Thursday night..Southwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Showers and Thunderstorms likely.
Friday night..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday..West winds 5 to 10 knots becoming southwest in the late morning and afternoon. Waves 1 foot or less. Dominant period 4 seconds. Showers and Thunderstorms likely.
Saturday night..West winds 5 to 10 knots becoming northwest after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Sunday..North winds 5 to 10 knots becoming south in the late morning and afternoon. Waves 1 foot or less. Dominant period 4 seconds. Showers and Thunderstorms likely.
Sunday night..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 949 Pm Cdt Tue Aug 20 2019
Synopsis..Ridge extension of bermuda high pressure area across the northern gulf of mexico will persist through the week. Unsettled pattern will provide several periods of Thunderstorms over the coastal waters through Saturday.


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 210438
afdlix
area forecast discussion
national weather service new orleans la
1138 pm cdt Tue aug 20 2019

Update
Updated for the 06z aviation discussion.

Aviation
Vfr conditions prevail at all area airports and will persist
through the morning hours. However, periods of vicinity showers
and storms are possible at most area airports through the morning
and afternoon hours Wednesday that could cause lower ceilings and
visibilities. These storms could cause temporary wind shifts
greater than 30 degrees as well. Msw

Prev discussion issued 344 pm cdt Tue aug 20 2019
discussion...

overall synoptic overview of the northern gulf coast states
continues to reflect an unsettled summertime pattern thanks to
weak low mid level heights and ample daytime heating - leading to
daily afternoon evening rain and storm chances. Only local
enhancement to note is a weak inverted trough in the low mid
levels, generally situated from the ms delta, NE to southern al.

While most convection across inland locations should come to an
end after sunset, some overnight showers or perhaps a few storms
may persist across southern ms, generally along and north of
i-10 12 and east of i-55 due to supportive dynamics convergence in
association with the westward progressing inverted trough.

Blended guidance did hint at this enhancement, with some
overnight pop's in this location, but have kept higher pop's
across offshore zones due to overnight marine instability in
place.

By Wednesday, the aforementioned weak inverted trough tracks west
across central la, with a deep southerly moist return flow
developing across most of SE la and southern ms. This will help
drag a tongue of enhanced pw of around 2.3-2.5", combined with
increasing southerly 925-700mb layer winds ~10-20knots. Overall
impact will lead to an increase in storm coverage tomorrow, with a
few stronger thunderstorms possible producing wind gusts
25-35mph. This increase in low-level flow may help move storms a
bit more, with an average storm motion 180 8kts, but being this
weak means storms will largely propagate from outflow boundary
interactions and still produce localized flooding.

The southerly return flow will persist and deepen Thursday and
into Friday, with continued anomalously high pw each day leading
to widespread shower and storm chances. Weak storm motions
continuing to average around 180 7-8kts will allow for a
persistent day-to-day threat of localized flash flooding, as well
as gusty downdraft winds.

This upcoming weekend into early next week will feature much of
the same story. Interesting to note the nam GFS points at some
type of small (perhaps mesoscale?) low to mid-level spin up in the
nw gomex under weak heights aloft. H5 temps illustrate this to
have a warm core with it so this may need to be monitored. Only
local impacts should be continued day-to-day widespread
shower storm chances. Good news is with so much rain, temperatures
appear to remain near to slightly below normal, with no signs of
excessive heat in the long range at this time. Klg
marine...

overall weather pattern will continue to remain unsettled across
marine zones, thanks to a weak inverted trough across coastal se
la and southern ms areas. Expect spotty shower storm chances
through the next several days, with better coverage in the
overnight hours. Main threats in any one storm will be gusty
downdraft winds in excess of 25-35 knots and lightning. This
pattern should continue through the weekend and early next week.

Klg
aviation...

convective development will be the primary concern through 00z.

Have included vcts wording at all of the terminals to reflect this
risk, and have prevailing MVFR visibilities and showers at khum
where ongoing convection is most pronounced today. Given the high
soil moisture values in place at kmcb, kbtr, khdc, and kasd from
previous rains, another round of low ceilings and fog will be
possible tonight. Have prevailing lifr ceilings developing after
10z and lingering through 14z at these terminals, and have also
included some ifr visibility restrictions at kmcb around 12z
tomorrow. The low stratus deck should gradually lift into an MVFR
layer of 1500 to 2000 feet at these terminals after 15z tomorrow.

The remaining terminals should see MVFR ceilings of around 3000
feet after 15z tomorrow as cumulus development increases with
daytime heating. 32
decision support...

dss code: green.

Deployed: none.

Activation: none.

Activities: none.

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; marginal risk severe or excessive rain.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support for slight risk severe
or excessive rain.

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

Red = full engagement for moderate to high risk of severe and or
excessive rainfall, or direct tropical threats; events of
national significance.

Preliminary point temps pops
Mcb 91 72 89 72 30 20 70 10
btr 91 75 89 74 40 20 80 10
asd 90 74 90 74 60 30 50 10
msy 90 76 90 77 70 30 60 10
gpt 87 74 87 75 70 40 40 20
pql 88 73 89 74 70 40 30 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 14 mi59 min SSW 4.1 G 7 80°F 85°F1018.3 hPa
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 31 mi59 min 84°F
PTBM6 - 8741003 - Petit Bois Island, MS 32 mi65 min S 5.1 G 6 81°F 1018.3 hPa
GDXM6 - Grand Bay Reserve, MS 38 mi86 min S 6 82°F 1020 hPa76°F
SHBL1 - 8761305 - Shell Beach, LA 38 mi59 min S 2.9 G 4.1 79°F 87°F1018 hPa
KATA1 - Katrina Cut, AL 48 mi71 min SSE 4.1 81°F 1018.6 hPa (-0.3)

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 mi18 minN 010.00 miA Few Clouds78°F73°F87%1017.3 hPa
Keesler Air Force Base / Biloxi, MS18 mi75 minS 610.00 miA Few Clouds81°F74°F83%1017.9 hPa

Link to 5 minute data for KGPT

Wind History from GPT (wind in knots)
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Last 24hrS3--------------NE3NE3N4NE4NE5NE4NE6E5SE7SE10
G16
S7----S8S6SW4
1 day agoCalmCalmW3----Calm----CalmNW3CalmNW3NW5--N8NW4--SE20
G24
--CalmW6W4NW5Calm
2 days agoCalmCalmCalmCalmCalmCalm--CalmCalmCalmCalm----W6CalmW10
G15
W3S4S5SW3Calm--SW6Calm

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.


Tide / Current Tables for Ship Island, Mississippi Sound, 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (3,6,7,8)
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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.