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Marine Weather and Tides
Version 3.4 |
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 6:28AM | Sunset 7:27PM | Monday August 26, 2019 3:07 AM CDT (08:07 UTC) | Moonrise 2:10AM | Moonset 4:33PM | Illumination 18% |  |
GMZ532 Mississippi Sound- 912 Pm Cdt Sun Aug 25 2019
Rest of tonight..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Showers likely early in the evening. Chance of Thunderstorms through the night. Showers after midnight.
Monday..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Showers in the morning. Chance of Thunderstorms through the day. Chance of showers in the afternoon.
Monday night..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers until early morning. Slight chance of Thunderstorms through the night. Showers likely after midnight.
Tuesday..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..West winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday..Northwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday night..North winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the evening.
Thursday..North winds 5 to 10 knots. Waves 1 to 2 feet.
Thursday night..North winds 5 to 10 knots. Waves 1 to 2 feet.
Friday..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
Friday night..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Slight chance of showers and Thunderstorms after midnight.
Rest of tonight..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Showers likely early in the evening. Chance of Thunderstorms through the night. Showers after midnight.
Monday..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Showers in the morning. Chance of Thunderstorms through the day. Chance of showers in the afternoon.
Monday night..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers until early morning. Slight chance of Thunderstorms through the night. Showers likely after midnight.
Tuesday..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..West winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday..Northwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday night..North winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the evening.
Thursday..North winds 5 to 10 knots. Waves 1 to 2 feet.
Thursday night..North winds 5 to 10 knots. Waves 1 to 2 feet.
Friday..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
Friday night..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Slight chance of showers and Thunderstorms after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 912 Pm Cdt Sun Aug 25 2019
Synopsis..A broad area of low pressure will pass through the area tonight into tomorrow. High pressure will briefly build back in for Tuesday, but a front is expected to push into the coastal waters on Wednesday. High pressure will then settle over the waters for Thursday and Friday.
Synopsis..A broad area of low pressure will pass through the area tonight into tomorrow. High pressure will briefly build back in for Tuesday, but a front is expected to push into the coastal waters on Wednesday. High pressure will then settle over the waters for Thursday and Friday.
7 Day Forecast for Marine Location Near Pass Christian, MS
Hourly EDIT Helplocation: 30.22, -89.11 debug
Area Discussion for - New Orleans/Baton Rouge, LA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 klix 252048 afdlix area forecast discussion national weather service new orleans la 348 pm cdt Sun aug 25 2019 Short term No major shifts in thinking through Tuesday night in terms of the forecast. The combination of a shortwave trough axis and a pool of deeper tropical moisture associated with a tropical wave merging with the upper level trough will keep higher rain chances in the forecast through tomorrow morning. Have likely to categorical pop values in place for the entire forecast area, and locally heavy rainfall of 2 to 3 inches could still occur tonight into early tomorrow morning. Given this threat, have decided to keep the flash flood watch in effect for tonight. All of the guidance is in agreement that the trough axis will begin to stall as it moves offshore of southeast louisiana and east of coastal mississippi, and that the pool of deeper tropical moisture will also shift toward alabama and georgia. As a result, gradually decreasing rain chances are in the forecast for tomorrow afternoon and evening across much of the forecast area. However, the trough axis will linger over the coastal waters tomorrow night. Forcing associated with this trough axis combined with maximized instability over the waters during the overnight and early morning hours should support likely pop values in sounds and offshore marine zones. Temperatures through tomorrow afternoon will remain cooler than average due to the expected cloud cover in place. The trough axis will shift back inland during the day on Tuesday, and this will support scattered shower and thunderstorm development from late morning through the early evening hours across much of the forecast area. Have decided to go with high end chance pop values of 50 percent to reflect this risk. Temperatures on Tuesday will also climb back to more normal as a more typical partly cloudy sky is expected. Any convection should die off over land based zones in the evening hours, but land breeze induced convection should fire up over the eastern waters later Tuesday night. Long term Wednesday into Wednesday night will be a period of transition as a much stronger northern stream trough axis dives into the southeastern conus, and an associated surface boundary slides through the forecast area. This front will serve as a focus for scattered shower and thunderstorm activity Wednesday afternoon into evening, and drier air in the mid-levels could support a few stronger wind events with any deeper thunderstorms that develop Wednesday afternoon and evening. Strong dry air advection into the region late Wednesday night will lead to clearing skies and lower humidity values. Lows should dip into the lower 70s over the northern part of the CWA by Thursday morning. The strong dry air advection on the back of a deep layer northeast flow pattern will allow for a very stable airmass to develop on Thursday and persist through Saturday. Mostly clear skies, lower humidity values, and a larger diurnal range can be expected. Precipitable water values will be well below average at an inch or less through Saturday morning. By Saturday afternoon, an increase in onshore flow should push precipitable water values up to around 1.5 inches, and this could support isolated convection south of the i-10 corridor. The larger than average diurnal range will allow low temperatures to dip into the upper 60s and lower 70s for areas along and north of the i-10 corridor from Thursday night through Saturday night. South of the i-10 corridor lows in the low to middle 70s are forecast. Highs will warm into the lower 90s each day, and the low humidity values should keep heat index readings in the mid to upper 90s. Overall, these are pleasant conditions for late august. A weak inverted trough axis should slide into the area on Sunday, and a pool of deeper tropical moisture will accompany this trough. Precipitable water values should rise to around 2 inches by Sunday afternoon, and this will support more typical shower and thunderstorm development. Pop values are forecast to be in the 30 to 40 percent range, and temperatures will be near average. Overall, a return to more typical summer weather is expected for |
the beginning of september. Aviation A low pressure system passing over the terminals through tomorrow morning will keep lower ceilings and light to moderate rain with some embedded thunderstorms in the forecast at all of the terminals through tomorrow morning. Ceilings should generally range from 1000 to 2000 feet resulting MVFR and fuel alternate conditions through the evening hours. Visibilities are expected to range from 3 to 5 miles as the light to moderate rain persists. However, model guidance is indicating a band of thunderstorms potentially affecting kmsy, knew, kasd, and khdc between 00z and 03z. Have decided to include a tempo group over this time period at these terminals with ifr visibility restrictions. At kbtr, khdc, and kmcb prevailing ifr ceilings between 500 and 1000 feet will be possible between 03z and 15z tonight as the shield of rain passes through. Conditions should begin to improve back into MVFR range at these terminals after 15z tomorrow as the rain shield pulls to the east.VFR conditions should begin to develop at all of the terminals between 18z and 21z tomorrow outside of the convective threat. Marine A brief period of stronger winds may develop over the western waters late tonight into tomorrow morning as a low pressure system slides through the region. Southerly winds of around 15 knots will be possible for a few hours. Otherwise, prevailing onshore flow of 10 to 15 knots is expected through Tuesday along with seas of 1 to 3 feet. A cold front will pass through the waters on Wednesday, and winds will turn more westerly and then northwesterly through the day. Wednesday night through Friday will see northerly winds of 10 to 15 knots develop after the front pushes further into the gulf, and seas of 1 to 3 feet will continue to be possible. Decision support Dss code: yellow. Deployed: none. Activation: none. Activities: marginal to slight risk of excessive rainfall. Flash flood watch. 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 71 85 73 91 70 70 20 50 btr 74 88 76 92 60 70 20 40 asd 72 86 74 91 90 80 20 50 msy 76 87 77 91 90 70 20 50 gpt 74 84 76 89 90 90 30 50 pql 73 84 74 90 70 90 40 40 Lix watches warnings advisories La... Flash flood watch through Monday morning for laz036-037-039-040- 046>050-056>072. Gm... None. Ms... Flash flood watch from 7 pm cdt this evening through Monday morning for msz069>071-077-080. Gm... None. Pg |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| WYCM6 - 8747437 - Bay Waveland Yacht Club, MS | 14 mi | 55 min | SW 4.1 G 6 | 79°F | 86°F | 1012.3 hPa | ||
| PNLM6 - 8741533 - Pascagoula NOAA Lab, MS | 31 mi | 55 min | 84°F | |||||
| PTBM6 - 8741003 - Petit Bois Island, MS | 32 mi | 55 min | SSW 6 G 7 | 82°F | 1012.5 hPa | |||
| GDXM6 - Grand Bay Reserve, MS | 38 mi | 82 min | NNE 2.9 | 79°F | 1014 hPa | 76°F | ||
| SHBL1 - 8761305 - Shell Beach, LA | 38 mi | 55 min | S 5.1 G 6 | 78°F | 87°F | 1012.2 hPa | ||
| KATA1 - Katrina Cut, AL | 48 mi | 67 min | WSW 6 | 81°F | 1012.9 hPa (-0.7) |
Wind History for Gulfport Outer Range, MS
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
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| 2 days ago |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Gulfport - Gulfport-Biloxi International Airport, MS | 13 mi | 74 min | SW 3 | 10.00 mi | Overcast | 79°F | 73°F | 85% | 1011.9 hPa |
Link to 5 minute data for KGPT
Wind History from GPT (wind in knots)
| 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | Calm | Calm | SW | Calm | S | SE | S | S | G14 | Calm | Calm | SW G17 | Calm | Calm | Calm | SW | ||||||||
| 1 day ago | Calm | Calm | Calm | N | N | NE | NE | NE | Calm | S | SE | S | SE | S | W | N | N | Calm | ||||||
| 2 days ago | Calm | Calm | Calm | Calm | S | S | S | SE | S | SW | Calm | Calm | Calm |
Tide / Current Tables for Cat Island (West Point), Mississippi
EDIT Weekend mode (on/off) (on/off) Help One Week of DataCat Island (West Point)
Click for Map
Mon -- 02:10 AM CDT Moonrise
Mon -- 06:30 AM CDT Sunrise
Mon -- 07:01 AM CDT 2.34 feet High Tide
Mon -- 04:33 PM CDT Moonset
Mon -- 07:07 PM CDT 0.04 feet Low Tide
Mon -- 07:26 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:10 AM CDT Moonrise
Mon -- 06:30 AM CDT Sunrise
Mon -- 07:01 AM CDT 2.34 feet High Tide
Mon -- 04:33 PM CDT Moonset
Mon -- 07:07 PM CDT 0.04 feet Low Tide
Mon -- 07:26 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.1 | 1.3 | 1.6 | 1.8 | 2 | 2.2 | 2.3 | 2.3 | 2.3 | 2.2 | 2 | 1.8 | 1.5 | 1.2 | 0.9 | 0.6 | 0.4 | 0.2 | 0.1 | 0 | 0.1 | 0.2 | 0.4 | 0.6 |
Tide / Current Tables for Ship Island Pass, Mississippi
EDIT (on/off) Help One Week of DataShip Island Pass
Click for Map
Mon -- 02:09 AM CDT Moonrise
Mon -- 06:29 AM CDT Sunrise
Mon -- 07:03 AM CDT 2.35 feet High Tide
Mon -- 04:32 PM CDT Moonset
Mon -- 06:30 PM CDT 0.04 feet Low Tide
Mon -- 07:25 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:09 AM CDT Moonrise
Mon -- 06:29 AM CDT Sunrise
Mon -- 07:03 AM CDT 2.35 feet High Tide
Mon -- 04:32 PM CDT Moonset
Mon -- 06:30 PM CDT 0.04 feet Low Tide
Mon -- 07:25 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.2 | 1.4 | 1.6 | 1.9 | 2 | 2.2 | 2.3 | 2.4 | 2.3 | 2.2 | 2 | 1.8 | 1.5 | 1.1 | 0.8 | 0.5 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.3 | 0.5 | 0.7 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES Local Image of 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 (4,6,7,8)
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Ground Weather Radar Station Mobile, AL
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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. |