Sunday, December15, 2019
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Marine Weather and Tides
San Leon, TX

Version 3.4
NOTICE
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.
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 7:05AMSunset 5:24PM Sunday December 15, 2019 7:04 AM CST (13:04 UTC) Moonrise 9:03PMMoonset 10:14AM Illumination 85% Phase: Waning Gibbous; Moon at 18 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 Expires:201912152215;;814474 Fzus54 Khgx 150944 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 344 Am Cst Sun Dec 15 2019 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. Gmz330-335-152215- Matagorda Bay-galveston Bay- 344 Am Cst Sun Dec 15 2019
.small craft should exercise caution from this afternoon through Monday afternoon...
.small craft advisory in effect from Monday evening through Tuesday morning...
Today..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of sprinkles and drizzle late.
Tonight..South winds 15 knots. Bay waters slightly choppy. A slight chance of sprinkles early in the evening. A slight chance of drizzle in the evening. A chance of showers in the late evening and overnight.
Monday..Southwest winds around 15 knots becoming northwest 20 knots in the afternoon. Bay waters smooth becoming choppy in the afternoon. A chance of showers in the morning. Isolated Thunderstorms in the late morning and afternoon. Showers likely in the afternoon.
Monday night..North winds 20 to 25 knots. Bay waters choppy becoming rough after midnight. A slight chance of showers early in the evening.
Tuesday..North winds 20 to 25 knots decreasing to 15 to 20 knots in the afternoon. Bay waters rough becoming choppy in the afternoon.
Tuesday night..North winds 15 to 20 knots. Bay waters choppy.
Wednesday..North winds 10 to 15 knots becoming northeast 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Wednesday night..Northeast winds 5 to 10 knots. Bay waters smooth.
Thursday..East winds 5 to 10 knots becoming southeast in the afternoon. Bay waters smooth becoming smooth to slightly choppy in the afternoon.
Thursday night..East winds 5 to 10 knots. Bay waters smooth. A slight chance of showers after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 344 Am Cst Sun Dec 15 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Strengthened southerlies today behind an inland warm front with a continued threat for the return of sea fog tonight through Monday morning. The next cold front is still on schedule to pass over the local bay and gulf waters late tomorrow afternoon into early evening. Post frontal winds will significantly strengthen and frequently gust to gale Monday night through Tuesday. Strong north winds and heightened seas will eventually lower through Wednesday. Onshore flow will return by late Thursday.


7 Day Forecast for Marine Location Near San Leon, TX
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location: 29.48, -94.92     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 151229 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 629 AM CST Sun Dec 15 2019

AVIATION. A smattering of either IFR or MVFR decks with visibilites dropping to MVFR cats. Expect lower ceilings through the morning with only short-lived improvement as decks may scatter out to VFR later this morning or afternoon. Moderate southerly winds will also assist the sun in briefly scattering out decks before ceilings begin to fill back in just around or shortly after sunset tonight. Ceilings should remain at low end MVFR or even high end IFR with periods of light precipitation during the overnight hours. 31

PREV DISCUSSION. /ISSUED 407 AM CST Sun Dec 15 2019/

SHORT TERM [Through Monday] .

Very moist air moving in behind the inland advancement of a warm front has left low stratus and patchy fog in its rear flank. A decent 30-40 knot lower 3km wind has kept the lower levels mixed enough to break up some of these lower cloud decks over near coastal counties. Patchy fog has become locally dense within this damp environment and wouldn't be surprised to see sub 3 SM visibilites in fog along with cloud bases at or under 1 to 2k feet through the remainder of the morning. Sea fog has improved with these stronger low-mid layer winds but still needs to be monitored for late day into early Monday morning re-development per upper 60 dew point air overlying shelf water in the lower 60 SSTs.

Today will be very warm despite the early day overcast . scattered clouds through the afternoon with amped up south-southwest winds. Record maximum temperatures will be threatened as many warm up into the lower 80s. A very warm evening and Monday morning in the upper 60s to lower 70s as the approach of a Central Texas cold front maintains a brisk onshore wind. Precipitation chances increase through the overnight Monday morning hours for mainly drizzle or very light rain showers.

The cold front is timed to reach the Brazos River Valley late tonight or shortly before midnight . through the city mid to late Monday morning and be off the coastline during the late afternoon. Mainly showers will lead or be directly associated with the front although frontal forcing could tap into some better mid-layer CAPE and produce elevated daytime thunder. Any thunderstorms rooted in the surface layer will be confined to either the extreme southeastern CWA (points around Galveston Bay) or off into the northwestern Gulf Monday afternoon into the early evening. 31

LONG TERM [Monday Night Through Sunday] .

The cold front will be off the coast as Monday night begins, and any leftover rains will taper off from west to east in the evening. North winds will be on the increase under the tight pressure gradient in place (kinda breezy inland and breezy/windy near the coast and especially offshore). But the main weather feature will be the colder temperatures spreading across the area with Tuesday morning's lows bottoming out in the mid to upper 30s inland and in the low to mid 40s near the coast. Highs in the low to mid 50s are anticipated. The colder and drier weather will then persist for the next couple of days with at or slightly below freezing temperatures expected both Wednesday and Thursday mornings mainly to the north of the Interstate 10 corridor. Highs should reach the mid to upper 50s on Wednesday and the upper 50s to lower 60s on Thursday. Our next system moves eastward across our area at the end of the week with models showing a Thursday night through Friday night risk of showers. The weekend is still looking dry with near normal lows in the 40s and near normal highs in the 60s. 42

MARINE .

Enhanced mid-level south winds have reached the surface over the warmer far offshore waters and have maintained Caution criteria since this afternoon Current 1-2 foot nearshore. 5 foot offshore significant sea heights will pick back up through the day under this robust southerly flow pattern. A strong cold front will come across the waters late Monday afternoon. North winds and seas will significantly strengthen and lift respectively to Advisory levels Tuesday. An areawide Gulf Gale Watch is in effect from Monday night through Tuesday morning to account for frequent gusts to gale. Strong post frontal cold air advection over relatively warm waters will maintain a tight enough offshore pressure gradient to keep winds and seas at Advisory levels through Wednesday morning . eventually falling off through the Wednesday afternoon into evening hours. Surface high pressure re-positioning itself over the southeastern U.S. will veer light winds around to onshore by Thursday. The next cold frontal passage may occur on Friday. 31

CLIMATE .

Near record high temperature are possible today. Here are some record highs and their date of occurrence:

CLL . 84/1924 IAH . 82/1995 HOU . 81/1995 GLS . 77/2012

42

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 83 63 65 36 53 / 10 30 40 0 0 Houston (IAH) 81 69 77 39 54 / 20 50 70 10 0 Galveston (GLS) 78 68 76 44 55 / 10 40 80 10 0

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . Small Craft Advisory from 6 PM Monday to 9 AM CST Tuesday for the following zones: Galveston Bay . Matagorda Bay.

SMALL CRAFT SHOULD EXERCISE CAUTION from noon CST today through Monday afternoon for the following zones: Galveston Bay . Matagorda Bay.

Gale Watch from Monday evening through Tuesday morning 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 . 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.

SMALL CRAFT SHOULD EXERCISE CAUTION through Monday afternoon 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.

Small Craft Advisory until 6 PM CST Monday for the following zones: 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 . 31 Aviation/Marine . 42


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 0 mi53 min SSE 9.9 G 11 67°F 61°F1009.5 hPa
GRRT2 12 mi53 min SSW 7 G 8.9 66°F 62°F1009.7 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi59 min SSE 11 G 12 71°F 62°F1009.2 hPa
GTOT2 14 mi53 min S 8 G 14 69°F 62°F1010.1 hPa
MGPT2 - 8770613 - Morgans Point, TX 14 mi53 min SSE 2.9 G 6 63°F 63°F1010.1 hPa
RLOT2 - 8770971 - Rollover Pass, TX 22 mi47 min SSE 8.9 G 9.9 65°F 59°F1010.6 hPa
NCHT2 - 8770777 - Manchester, TX 25 mi53 min SSW 4.1 G 8 67°F 66°F1009.3 hPa
HIST2 29 mi59 min SSE 5.1 G 7 66°F 61°F1010.2 hPa
KXIH 30 mi30 min S 14 70°F 68°F
LUIT2 30 mi47 min S 8.9 G 9.9 67°F 63°F1011.2 hPa
42035 - GALVESTON 22NM East of Galveston, TX 32 mi35 min 7.8 G 9.7 1011.7 hPa
FCGT2 - 8772447 - USCG Freeport, TX 42 mi47 min S 8 G 8.9 67°F 62°F
FPST2 42 mi53 min SSE 9.9 G 11 68°F 63°F1009.7 hPa
SRST2 - Sabine Pass, TX 49 mi65 min SE 8 G 9.9 65°F 1010.9 hPa (+0.5)65°F

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX15 mi73 minSSE 86.00 miFog/Mist68°F66°F96%1010.2 hPa
Houston / Ellington, TX16 mi75 minSSE 87.00 miMostly Cloudy68°F66°F94%1009.5 hPa
Houston, Pearland Regional Airport, TX17 mi72 minSSE 66.00 miFog/Mist68°F64°F90%1009.8 hPa
Houston, Houston Hobby Airport, TX22 mi72 minS 86.00 miFog/Mist67°F64°F93%1009.8 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrN7NE8NE7NE8NE7E9E10SE10SE10SE7E6E7E8SE10SE11SE11SE11S9S10S10S11SE11S8SE9
1 day agoNE3E3SE7SE9CalmS10S9S12S10SW9SW65SW5SW7SW6CalmNW4CalmCalmCalmCalmCalmNE3N5
2 days agoE9E12E12NE11E9E11NE8E6NE7N6E5E4E5E5NE5NE3NE3E5E4CalmNE3E3N4N5

Tide / Current Tables for Eagle Point, Texas
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Eagle Point
Click for Map
Sun -- 04:52 AM CST     0.89 feet Low Tide
Sun -- 05:33 AM CST     0.89 feet High Tide
Sun -- 07:06 AM CST     Sunrise
Sun -- 10:13 AM CST     Moonset
Sun -- 04:08 PM CST     -0.39 feet Low Tide
Sun -- 05:22 PM CST     Sunset
Sun -- 09:03 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1110.90.90.90.90.90.80.80.70.50.30-0.2-0.3-0.4-0.3-0.2-00.20.50.70.9

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sun -- 01:48 AM CST     -0.00 knots Slack
Sun -- 07:05 AM CST     Sunrise
Sun -- 10:12 AM CST     Moonset
Sun -- 10:55 AM CST     -2.24 knots Max Ebb
Sun -- 03:50 PM CST     0.00 knots Slack
Sun -- 05:22 PM CST     Sunset
Sun -- 07:24 PM CST     2.27 knots Max Flood
Sun -- 09:02 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.1-0.3-0.4-0.5-0.7-1.1-1.5-1.9-2.2-2.2-2.1-1.9-1.4-0.70.11.11.92.22.21.91.61.2

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (8,2,3,4)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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