Sunday, August9, 2020
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Marine Weather and Tides
Rosenberg, 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 6:47AMSunset 8:10PM Sunday August 9, 2020 4:21 AM CDT (09:21 UTC) Moonrise 10:53PMMoonset 11:04AM Illumination 71% 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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GMZ335 Galveston Bay- 415 Am Cdt Sun Aug 9 2020
Today..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and isolated Thunderstorms.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Tuesday night..South winds 5 to 10 knots. Bay waters smooth.
Wednesday..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots. Bay waters smooth.
Thursday..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 415 Am Cdt Sun Aug 9 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Surface high pressure over the northeast gulf of mexico will continue to bring light winds and low seas to the area through the rest of the weekend. This onshore flow is expected to slowly strengthen by early next week as the high moves further east.


7 Day Forecast for Marine Location Near Rosenberg, TX
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location: 29.55, -95.82     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 090331 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1031 PM CDT Sat Aug 8 2020

SHORT TERM [Tonight Through Sunday Afternoon]. Quick update sent to lower rain chances overnight inland and to continue with the mostly clear skies. Lingering orphan anvils should dissipate quickly as well given the dry air aloft. Onshore flow will keep the low level moisture in place and will probably again lead to some light patchy fog in the inland portions of the coastal counties and also near Conroe/Cleveland. The spotty rains today will also bring a chance of light fog to those areas fortunate to have received rainfall.

Sunday morning should begin with isolated showers near the coast and spreading inland transitioning over to thunderstorms/showers after 9-10 am. Again it looks as though the baybreeze/seabreeze will be the primary focus for these and the collision of these two will likely help to give Houston a little better chance in the 1 pm-5pm window for a few slow moving storms. Isolated rainfall totals of 1-2 inches seems likely. Heat indices of 105-108 will be possible for areas along and south of a Columbus to Conroe to Livingston line with 107-109 possible for the coastal areas as early as 10am to noon. So be sure to wear the sunscreen, stay hydrated and when thunder roars go indoors.

Mostly a persistence forecast for tomorrow with little change aloft expected and fairly homogeneous in the low levels. 45

AVIATION [00Z TAF Issuance]. VFR now with patchy MVFR ceilings near CLL around sunrise and patchy fog possible LBX/CXO as well. VCSH/VCTS starting out near the coast 11-12z and spreading into LBX/SGR/HOU 14-16Z and IAH/CXO 19-21z. Storms will be fighting the cap over far inland areas and so have held off on any mention at UTS/CLL. 45

PREV DISCUSSION /Issued 325 PM CDT Sat Aug 8 2020/.

LONG TERM [Monday through Saturday].

The h500 hPa subtropical ridge over western TX will continue to dominate the region while at the surface, a strong high pressure system across the Gulf retrogrades into the Texas coast. This flow pattern will continue to bring warm and muggy conditions; typical southeast TX weather.

Subsidence aloft continues to dominate the region to start off the workweek. Monday through Wednesday look relatively dry and of course, very warm. Light south to southeast surface flow combined with ridging aloft and elevated 850hPa temperatures in the upper teens Celsius will keep unpleasant weather conditions. Tuesday and Wednesday could be the warmest days of the week with daytime highs running 1 to 3 degrees above normal at some locations. This will result in temperatures in the mid to upper 90s. These temperatures combined with surface dewpoints in the 70s could result in heat indices close to heat advisory criteria. Despite strong mid to upper level subsidence, a few shower/storms cannot be ruled out each day, with the typical pattern of morning showers/storms along the coast, then inland during the afternoon.

Mid to upper level ridging shifts slightly west, yielding some vort max/shortwaves to ride along its edge Thursday into the weekend. Latest deterministic and ensemble guidance suggest lower precipitation chances on Thursday as better forcing will remain further north. Given the latest guidance; have lowered PoPs for Thursday to around 20-25 percent in the afternoon. Better rain and storm chances are possible on Friday due to a strengthening southeasterly surface flow and increased low to mid level lapse rates.

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MARINE.

High pressure over the eastern Gulf and low pressure in the lee of the Rockies will maintain a light to occasionally moderate onshore flow through next Friday. Seas will remain relatively flat, running roughly 1-3 feet. No tide or rip current issues are expected. 43

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 76 97 76 98 76 / 10 20 0 10 0 Houston (IAH) 79 95 77 95 78 / 60 50 10 20 0 Galveston (GLS) 84 93 83 90 83 / 20 20 0 10 0

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . None.



SHORT TERM/AVIATION . 45 MARINE/CLIMATE . 41


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 32 mi51 min SSW 1 G 4.1 83°F 90°F1018 hPa
MGPT2 - 8770613 - Morgans Point, TX 45 mi51 min SSW 2.9 G 8 84°F 89°F1018.6 hPa
EPTT2 - 8771013 - Eagle Point, TX 48 mi51 min SW 5.1 G 7 84°F 89°F1018.1 hPa
LUIT2 49 mi51 min SSW 8 G 11 85°F 88°F1019.7 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Sugar Land Municipal / Hull Field Airport, TX10 mi28 minS 310.00 miFair80°F77°F90%1018.3 hPa
Houston Executive Airport, TX18 mi26 minN 010.00 miFair77°F77°F100%1019 hPa
Houston Southwest Airport, TX18 mi26 minN 010.00 miFair75°F74°F100%1018.6 hPa

Link to 5 minute data for KSGR

Wind History from SGR (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmS4S5--SE46E7S9SE10S10S9S10S9S8S6S6S4S6S4S3
1 day agoCalmCalmCalmCalmS4S6SE7S9SW7S8S8SE8S10S10SE11SE11SE10S8S4S3CalmCalmCalmCalm
2 days agoCalmS3S3CalmS4S5S6S7SE8S9SE9S11S12S11S11S10S9S8S6S4S4SE3S4SE3

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
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Clear Lake
Click for Map
Sun -- 02:35 AM CDT     0.48 feet High Tide
Sun -- 06:45 AM CDT     Sunrise
Sun -- 08:25 AM CDT     0.24 feet Low Tide
Sun -- 12:00 PM CDT     Moonset
Sun -- 02:57 PM CDT     0.56 feet High Tide
Sun -- 08:05 PM CDT     Sunset
Sun -- 10:10 PM CDT     0.18 feet Low Tide
Sun -- 11:49 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Sun -- 02:36 AM CDT     0.65 feet High Tide
Sun -- 06:45 AM CDT     Sunrise
Sun -- 08:33 AM CDT     0.41 feet Low Tide
Sun -- 12:00 PM CDT     Moonset
Sun -- 02:55 PM CDT     0.74 feet High Tide
Sun -- 08:05 PM CDT     Sunset
Sun -- 09:57 PM CDT     0.36 feet Low Tide
Sun -- 11:49 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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 (5,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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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 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.