Wednesday, January22, 2020
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Marine Weather and Tides
Surfside Beach, 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 7:13AMSunset 5:52PM Wednesday January 22, 2020 5:20 PM CST (23:20 UTC) Moonrise 5:26AMMoonset 3:58PM Illumination 5% Phase: Waning Crescent; Moon at 27 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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GMZ355 Coastal Waters From High Island To Freeport Tx Out 20 Nm- 321 Pm Cst Wed Jan 22 2020
.small craft advisory in effect through Thursday afternoon...
Tonight..Southeast winds 20 to 25 knots becoming southwest after midnight. Seas 6 to 8 feet with occasional seas up to 10 feet. A chance of showers and isolated Thunderstorms early in the evening, then showers and isolated Thunderstorms in the late evening and early morning. A chance of showers late. Some Thunderstorms may produce gusty winds in the late evening and early morning.
Thursday..West winds 10 to 15 knots becoming northwest 15 to 20 knots in the afternoon. Seas 4 to 6 feet with occasional seas up to 7 feet. A slight chance of showers early in the morning.
Thursday night..North winds 10 to 15 knots. Seas 2 to 4 feet.
Friday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet.
Friday night..East winds 5 to 10 knots. Seas 1 to 2 feet.
Saturday..East winds around 10 knots. Seas 2 to 3 feet. A slight chance of showers in the late morning and early afternoon. Showers likely late in the afternoon.
Saturday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Showers until early morning, then a chance of showers late.
Sunday..East winds 5 to 10 knots. Seas 3 to 4 feet. A chance of showers.
Sunday night..Northeast winds 5 to 10 knots. Seas 2 to 4 feet.
Monday..Northeast winds around 5 knots becoming east in the afternoon. Seas 2 to 3 feet.
Monday night..Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A slight chance of showers and isolated Thunderstorms late.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 321 Pm Cst Wed Jan 22 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Rain and showers will move through the coastal waters late this afternoon through Thursday morning. A second round of showers and a few Thunderstorms will will be crossing the area after 10 pm. A cold front should push off the coast toward mid morning Thursday with moderate northwest and north winds in its wake. High pressure will quickly move off to the east and a moist onshore flow should resume and increase by late Friday. A developing coastal trough will provide another shot of showers and Thunderstorms Saturday night and Sunday.


7 Day Forecast for Marine Location Near Surfside Beach, TX
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location: 29.04, -95.18     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 222143 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 343 PM CST Wed Jan 22 2020

DISCUSSION. Three rain producing weather systems are forecast to affect the area over the next week in this fairly progressive flow pattern. An upper disturbance will pivot through tonight . with a surface cold front dropping through . a coastal/Gulf low will develop in advance of a short wave over the weekend . and a Pacific front will cross from west to east across the area next Tuesday.

SHORT TERM [Tonight and Thursday]. Round one of rainfall moving through the area now with abundant stratiform rain and deeper convection . showers and can't rule out an isolated thunderstorm. The second round moves through overnight and soundings support the potential for more thunderstorms over the southern half of the area. Brief periods of moderate to heavy rain could accompany any of these isolated thunderstorms. The rain should come to an end before 6 am. Cloudy weather prevails through the arrival of the cold front Thursday 7-10 am (nw-se track) even though temps will end up being warmer in the wake of the Pacific cold front.

Northwest winds becoming north and drying out throughout the day Thursday.

LONG TERM [Thursday Night Through Wednesday]. Thursday night through Friday night . Short wave trough and associated surface cold front clear the area . with subsidence and clearing in its wake as high pressure builds in from the west and a drier airmass filters in. Very pleasant weather then on tap for Friday into Saturday with high pressure in control.

Saturday and Sunday . Surface high pushes east with return flow on backside bringing onshore flow and increasing moisture by Saturday afternoon. Split flow pattern aloft with more short wave energy to cross the region on Sunday with a positively tilted trough in the northern stream . and another shortwave heading out over the Gulf in a southern stream. EC a little stronger with this southern stream disturbance. End result is a complex surface pattern with a low pressure system developing near the coast or over the Gulf . and a return to rain chances . with highest chances over the Gulf and for coastal counties. Still some uncertainty with this feature. Its possible most rain could stay out over the water . but think will see measurable most areas . with at least the possibility heavier rains near the coast.

Monday through Wednesday . Onshore flow Monday keeps fairly moist air mass in place. Another Pacific cold front crosses the region from west to east . mostly likely Tuesday . although as always some timing uncertainty this far out. Models suggest drying out . and colder . drier on Wednesday . but some model differences . uncertainly on the strength of the front.

Reilly

AVIATION [18Z TAF Issuance]. Ceilings across the northwestern 2/3rds of the region firmly below 900 feet and lowering while nearer the coast 2000-10000ft ceilings dominate. As the s/w edges eastward and rainfall increases in coverage over the southern areas expect the ceilings to lower with evaporating rain/virga then becoming rain and IFR or lower ceilings by late afternoon. Rain should taper off after midnight west to east but cold front doesn't scour out the low level moisture until 14-17z frame. In that interim ceilings/visibility could well tank as winds relax/wet ground/saturated air remains and VLIFR conditions will be possible mainly IAH northward. 45

MARINE. Tide levels remain elevated as seas have built throughout the day and were up to 7-9 feet and still building. During the night expect seas of 5-8 feet nearshore and 8-12 feet offshore with winds continuing to increase as the s/w moves through. SCA has been extended for the Gulf waters to 1 pm. Northerly flow in the wake of Thursday's Pacific front quickly becoming northeasterly then on towards easterly as high pressure slides by.

Winds and seas will potentially increase again over the weekend as a Gulf low develops. How much will depend on details of the cyclogenesis . how intense the low becomes. Think GFS may be a bit overdone with the intensity and length of fetch . so went below WNA wave model guidance which is driven by the GFS winds. Winds and seas diminish again early in the week . then bump up again behind Pacific frontal passage on Tuesday with moderate offshore flow behind the fropa Tuesday night and Wednesday.

45 18


PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 50 64 39 65 40 / 80 20 0 0 0 Houston (IAH) 54 69 43 65 44 / 90 30 0 0 0 Galveston (GLS) 59 67 51 63 54 / 90 30 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . Small Craft Advisory until 6 AM CST Thursday for the following zones: Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM . Coastal waters from High Island to Freeport TX out 20 NM . Galveston Bay . Matagorda Bay . Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM . Waters from High Island to Freeport TX from 20 to 60 NM.



DISCUSSION . 18 NEAR TERM . 45 SHORT TERM . 45 LONG TERM . 18 AVIATION . 45 MARINE . 45


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LUIT2 4 mi51 min 59°F 1017.9 hPa
FCGT2 - 8772447 - USCG Freeport, TX 9 mi51 min 58°F1016.4 hPa
FPST2 9 mi51 min 59°F 60°F1015.8 hPa
GRRT2 24 mi51 min 56°F1015.5 hPa
GTOT2 28 mi51 min 58°F 59°F1016.1 hPa
SGNT2 30 mi51 min 59°F 58°F1012.8 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 33 mi57 min 59°F 56°F1015.4 hPa
EPTT2 - 8771013 - Eagle Point, TX 34 mi51 min 55°F1015.1 hPa
KXIH 36 mi26 min SE 19 59°F
42035 - GALVESTON 22NM East of Galveston, TX 43 mi31 min 18 G 21 7 ft1017.4 hPa
EMAT2 45 mi51 min 58°F1011.6 hPa
MGPT2 - 8770613 - Morgans Point, TX 46 mi51 min 60°F1015 hPa
NCHT2 - 8770777 - Manchester, TX 48 mi51 min 57°F 62°F1012 hPa
RLOT2 - 8770971 - Rollover Pass, TX 48 mi51 min 58°F 53°F1016.6 hPa

Wind History for USCG Freeport, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Angleton / Lake Jackson, Brazoria County Airport, TX16 mi28 minSE 14 G 2110.00 miLight Rain59°F55°F90%1013.2 hPa
Galveston, Scholes Field, TX23 mi29 minSSE 202.00 miHeavy Rain Fog/Mist and Breezy60°F57°F93%1016.3 hPa

Link to 5 minute data for KLBX

Wind History from LBX (wind in knots)
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Last 24hrE8E4E5E5SE5SE7E6E7E6E6NE5E6E7E9SE11SE9SE10SE10SE12
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1 day agoNE4E4NE3CalmCalmN3N4NE4E3NE3NE4NE4NE3E4E6E3SE8E8E11E8E11
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2 days agoN7NE8NE6N5N3CalmCalmN5N5N3N5N6N6N8N6N9
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Tide / Current Tables for Christmas Point, Christmas Bay, Texas
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Christmas Point
Click for Map
Wed -- 05:25 AM CST     Moonrise
Wed -- 07:13 AM CST     Sunrise
Wed -- 10:57 AM CST     -0.58 feet Low Tide
Wed -- 03:57 PM CST     Moonset
Wed -- 05:50 PM CST     Sunset
Wed -- 07:44 PM CST     0.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.60.60.50.40.2-0-0.2-0.4-0.5-0.6-0.5-0.4-0.200.30.50.60.70.70.70.60.6

Tide / Current Tables for Alligator Point, West Bay, Texas
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Alligator Point
Click for Map
Wed -- 05:25 AM CST     Moonrise
Wed -- 07:13 AM CST     Sunrise
Wed -- 10:59 AM CST     -0.58 feet Low Tide
Wed -- 03:57 PM CST     Moonset
Wed -- 05:50 PM CST     Sunset
Wed -- 07:51 PM CST     0.70 feet High Tide
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 (18,4,5,8)
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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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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.