Monday, August10, 2020
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Marine Weather and Tides
Galveston, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:43AMSunset 8:04PM Monday August 10, 2020 1:46 PM CDT (18:46 UTC) Moonrise 11:19PMMoonset 11:50AM Illumination 57% Phase: Waning Gibbous; Moon at 21 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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GMZ375 Expires:202008110415;;233733 Fzus54 Khgx 101552 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 1052 Am Cdt Mon Aug 10 2020 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz355-375-110415- Coastal Waters From High Island To Freeport Tx Out 20 Nm- Waters From High Island To Freeport Tx From 20 To 60 Nm- 1052 Am Cdt Mon Aug 10 2020
Rest of today..Southeast winds around 10 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms late in the afternoon.
Tonight..South winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers late.
Tuesday..South winds 5 to 10 knots. Seas 2 feet. A slight chance of showers and isolated Thunderstorms.
Tuesday night..South winds around 10 knots. Seas 2 feet.
Wednesday..South winds 5 to 10 knots becoming southeast in the afternoon. Seas 1 to 2 feet. A slight chance of showers and Thunderstorms in the morning.
Wednesday night..South winds around 10 knots. Seas 1 to 2 feet.
Thursday..South winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Seas 1 to 2 feet.
Friday..South winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Seas 1 to 2 feet.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1052 Am Cdt Mon Aug 10 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Surface high pressure over the gulf of mexico will continue to bring light onshore winds and seas from 1 to 3 ft through early next week.


7 Day Forecast for Marine Location Near Galveston, TX
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location: 28.84, -94.35     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 101730 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1230 PM CDT Mon Aug 10 2020


AVIATION [18Z TAF Issuance] . VFR conditions are expected through most of the period. Diurnal FEW-SCT CU field at around 40-60 kft are expected through early this evening. Storm chances are minimal; however, a few storms could develop around the northern terminals later this afternoon. Did not mention VCSH/VCTS in TAFs due to low confidence in occurrence and coverage.

MVFR to occasional IFR conditions are possible across Brazos Valley into eastern TX, mainly impacting KCLL and KUTS terminals early Tuesday morning.

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PREV DISCUSSION. /ISSUED 1105 AM CDT Mon Aug 10 2020/

UPDATE . The majority of the forecast is on track. As of 11 AM CDT,temperatures are quickly climbing into the upper 80s to lower 90s with heat indices between 95-105 degrees. 850 to 700 mba temperatures suggest strong capping for later today into early evening. Have lowered precipitation chances to around 20 percent or less. An isolated storm or two cannot be ruled out north of I-10 later this afternoon. 05

PREV DISCUSSION . /ISSUED 351 AM CDT Mon Aug 10 2020/

SHORT TERM [Today Through Tomorrow Night] .

The next couple of days are looking fairly quiet across the CWA. During the day we can see mostly clear to partly cloudy skies after some morning mist and stratus clears in the northern and western counties. In the afternoon, some coastal showers could form and once influenced by seabreeze, could form into thunderstorms as they move inland. Most storms should not go much further than Montgomery County. High temperatures will range from low 90s coastal to around 100 in the northern counties. Lows will be in the low to mid 70s across the area with the immediate coastal area in the low 80s. Heat indicies today should remain in the mid 100s just below advisory levels and tomorrow is looking to be borderline advisory level in the western counties. 35

LONG TERM [Tuesday Night through Monday] .

Mid/upper level ridging, centered off to our west, will continue to be the state's main weather player for this week. Look for daily rain chances, mainly early in the morning near the coast and further inland during the afternoon. The ridging and associated subsidence looks to be strong enough to keep most of our northwest locations on the dry side through Friday or Saturday. Over the weekend and especially heading into the start of next week, the ridge looks to edge further off to the west, and this should allow for an increase in the mainly diurnal rain chances for most of the area.

Slightly above normal temperatures (little change from what we have been experiencing over the last several days) will continue through the period. Record high minimum temperatures have either been tied or broken at HOU and GLS over the past four days, and look for this trend to continue during this long term period. We will continue to flirt with peak heat index values at or above 108 for much of this week, but at this time these readings look to not be too widespread to warrant a Heat Advisory. As we have been saying for several days now, continue to protect yourself and your loved ones, including pets, if you are to spend time outdoors or in areas with poor ventilation. Continue to practice Heat Safety! 42

MARINE .

Light onshore flow will persist through the forecast period with seas remaining at 1-3ft. Some higher onshore flow can be expected early in the night. A few isolated showers and thunderstorms can be seen in the early morning and evening hours. 35

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 98 77 98 76 99 / 10 10 10 0 10 Houston (IAH) 97 78 96 77 96 / 20 10 20 0 20 Galveston (GLS) 93 83 90 83 91 / 10 20 20 0 20

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . NONE.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42035 - GALVESTON 22NM East of Galveston, TX 27 mi26 min S 9.7 G 12 86°F 88°F1018 hPa80°F
42043 - GA-252 TABS B 31 mi106 min SSE 9.7 G 12 87°F1019.2 hPa (+0.0)
GTOT2 40 mi46 min SSE 6 G 12 89°F 88°F1018.5 hPa (-0.5)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 41 mi46 min SSE 9.9 G 12 86°F 88°F1017.8 hPa (-0.5)
GRRT2 43 mi46 min S 8 G 12 87°F 88°F1018.3 hPa (-0.4)
LUIT2 44 mi46 min SSE 7 G 13 89°F 87°F1020 hPa (-0.6)
RLOT2 - 8770971 - Rollover Pass, TX 47 mi46 min S 7 G 9.9 86°F1019.1 hPa (-0.4)

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KXIH

Wind History from XIH (wind in knots)
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Tide / Current Tables for Galveston (Pleasure Pier), Texas (2)
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Galveston (Pleasure Pier)
Click for Map
Mon -- 01:12 AM CDT     1.27 feet Low Tide
Mon -- 06:45 AM CDT     Sunrise
Mon -- 07:50 AM CDT     1.72 feet High Tide
Mon -- 12:52 PM CDT     Moonset
Mon -- 03:03 PM CDT     0.66 feet Low Tide
Mon -- 08:03 PM CDT     Sunset
Mon -- 11:03 PM CDT     1.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.31.31.41.41.51.61.71.71.71.51.310.80.70.70.70.80.91.11.31.51.61.6

Tide / Current Tables for Galveston Bay entrance, south jetty, Texas
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Galveston Bay entrance
Click for Map
Mon -- 01:13 AM CDT     1.21 feet Low Tide
Mon -- 06:44 AM CDT     Sunrise
Mon -- 08:17 AM CDT     1.64 feet High Tide
Mon -- 12:51 PM CDT     Moonset
Mon -- 03:04 PM CDT     0.63 feet Low Tide
Mon -- 08:03 PM CDT     Sunset
Mon -- 11:30 PM CDT     1.53 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.21.21.31.41.41.51.61.61.61.51.310.80.70.60.70.70.911.21.31.51.5

Weather Map
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wmap_A
GEOS 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 Houston/Galveston, TX (14,3,4,5)
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Ground Weather Radar Station Houston/Galveston, TX
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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 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 numerous 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.