Tuesday, January26, 2021
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Marine Weather and Tides
San Leon, TX

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:10AMSunset 5:54PM Tuesday January 26, 2021 6:31 PM CST (00:31 UTC) Moonrise 3:57PMMoonset 5:35AM Illumination 98% Phase: Waxing Gibbous; Moon at 14 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- 328 Pm Cst Tue Jan 26 2021
.small craft advisory in effect from late tonight through Wednesday evening...
Tonight..Northeast winds 5 to 10 knots becoming north near 20 knots and gusty after midnight . Bay waters smooth becoming choppy to rough after midnight.
Wednesday..North winds 15 to 20 knots with gusts around 25 knots decreasing to 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon.
Wednesday night..North winds 15 to 20 knots. Bay waters choppy.
Thursday..Northeast winds 10 to 15 knots becoming east 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Thursday night..East winds 5 to 10 knots. Bay waters smooth.
Friday..Southeast winds 5 to 10 knots. Bay waters smooth.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers late.
Saturday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Saturday night..Southwest winds around 10 knots becoming west after midnight. Bay waters smooth to slightly choppy. A slight chance of showers.
Sunday..Northwest winds around 10 knots. Bay waters smooth to slightly choppy.
Sunday night..North winds 10 to 15 knots. Bay waters slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 328 Pm Cst Tue Jan 26 2021
Synopsis for high island to matagorda ship channel out 60 nm.. A cold front will push off the coast before Sunrise and bringing strong offshore flow. The strong winds should begin to relax late Wednesday afternoon and evening but moderate offshore flow should prevail well into Thursday. Winds become southeasterly Friday morning and persist until the next cold front arrives late Saturday night or early Sunday morning. Some fog could develop before the arrival of this front.


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 270003 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 603 PM CST Tue Jan 26 2021

AVIATION [00Z TAF Issuance].

Not planning on a lot of changes with the going TAF trends with re- gard to the timing of the cold front tonight/overnight. Short range guidance still indicating a fairly dry/quiet FROPA with CIGS likely lifting quickly in its wake. Otherwise, will be keeping a close eye on possible patchy MVFR CIGS near the coast overnight. 41

PREV DISCUSSION. /ISSUED 343 PM CST Tue Jan 26 2021/

SHORT TERM [Tonight Through Wednesday Night] .

Yesterday's surface cold front remains stalled well offshore, with some lingering cloudiness still present across the barrier islands and immediate inland areas. That being said, the gradual clearing over the past 24 hours has allowed for more efficient daytime heating this afternoon, while the shift to east-northeasterly winds has limited CAA. Overall, daytime highs have risen above model consensus with Hobby Airport reaching 77 at 3PM and Galveston reaching the 75 earlier today.

As an upper trough traverses the Central Plains, the approach of a reinforcing cold front overnight will provide an additional surge of cooler air to SE TX as winds strengthen and shift northward. The boundary should arrive at the Brazos Valley before midnight and will likely clear the coast before sunrise on Wednesday. With limited moisture availability given the influx of drier air yesterday, the frontal passage should be largely a dry one. However, as indicated by recent HRRR solutions, some isolated showers may arise near the coast where near-surface moisture remains higher. This raises the additional possibility of some patchy fog development in these locations prior to the arrival of the front but coverage and intensity should be limited.

Tonight's lows should be fairly similar to last night's with most locations seeing values in the upper 40s to low 50s. As moderate to strong northerly winds (with gusts rising to up to 25mph) develop in the wake of the front, a further cooldown is expected tomorrow. Daytime highs are unlikely to rise above 70, while overnight lows may approach freezing in the northern zones and will otherwise be in the mid-30s to lower 40s.

Cady

LONG TERM [Thursday through Tuesday] .

High pressure in the Midwest will dominate the Southern Planes bringing clear to mostly clear skies and relatively drier conditions. Thursday will be pleasant with highs climbing to around 60 after lows in the low to mid 40s. The large high will start moving to the northeast on Friday into the Ontario area, giving way to an onshore flow. Warmer and more moist will set back in warming lows on Friday to the mid 40s and warming to the mid to upper 60s.

A cold front, Saturday will increase rain chances, but most higher chances remain to the north of I-10 but showers or a thunderstorm can't be ruled out along the boundary. Intensity is still looking weak with PWATs peaking around 1.3 inches and not much instability along the front. Highs will reach the mid 70s after a morning low in the mid 50s to around 60. Early Sunday Morning, the front will have passed and high pressure returns to the area. Lows will still reach around mid 50s to around 60 with highs around 70. Cooler temperatures will filter in with drier air and clearing skies through mid week as high pressure moves across the area. 35

MARINE . SCA hoisted for the anticipated change post frontal. Northeast winds this evening will relax and seas very slowly diminish. The cold front arrives and winds crank up quickly - timing should bring it to Matagorda Bay around 3 am and off of Galveston between 4 and 5 am. Winds of 15 to 25 knots will be common and wind gusts of 30 knots with even a few of 35 knots in the 6am to noon timeframe. Persistent offshore continues Wednesday afternoon through Thursday evening through diminishing to 10-15 knots. Seas will be slow to fall with the persistent offshore flow. Onshore flow resumes Friday and could have a short period of sea fog Saturday before the next cold front scours out the moisture Sunday morning. 45

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 45 63 36 60 40 / 0 0 0 0 0 Houston (IAH) 51 67 41 61 42 / 0 0 0 0 0 Galveston (GLS) 56 65 49 56 52 / 10 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . Small Craft Advisory from 3 AM to 10 PM CST Wednesday 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 . 99 Aviation/Marine . 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 0 mi272 min E 6 G 8 67°F 64°F1009.5 hPa (-2.0)
GRRT2 12 mi272 min ENE 9.9 G 11 65°F 66°F1009.3 hPa (-2.0)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi272 min NE 8.9 G 11 63°F 62°F1008.4 hPa (-2.1)
GTOT2 14 mi272 min E 9.9 G 15 68°F 63°F1009.2 hPa (-2.2)
MGPT2 - 8770613 - Morgans Point, TX 14 mi272 min E 8 G 8.9 74°F 61°F1009.7 hPa (-2.2)
RLOT2 - 8770971 - Rollover Pass, TX 22 mi272 min E 14 G 17 68°F 65°F1009.7 hPa (-2.2)
NCHT2 - 8770777 - Manchester, TX 25 mi272 min E 5.1 G 7 74°F 65°F1009.5 hPa (-2.1)
HIST2 29 mi272 min E 8.9 G 12 70°F 62°F1009.4 hPa (-2.2)
LUIT2 30 mi272 min ENE 13 G 16 65°F 62°F1008.7 hPa (-2.3)
42035 - GALVESTON 22NM East of Galveston, TX 32 mi252 min ENE 7.8 G 9.7 62°F 59°F1008.8 hPa
42043 - GA-252 TABS B 34 mi332 min ENE 7.8 60°F
FPST2 42 mi272 min NE 8.9 G 9.9 63°F 1008.3 hPa (-2.3)

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX15 mi40 minNE 710.00 miOvercast66°F58°F75%1009.5 hPa
Houston / Ellington, TX16 mi42 minE 710.00 miMostly Cloudy70°F52°F53%1009.1 hPa
Houston, Pearland Regional Airport, TX17 mi39 minE 710.00 miPartly Cloudy70°F51°F51%1009.6 hPa
Houston, Houston Hobby Airport, TX22 mi39 minE 610.00 miMostly Cloudy72°F48°F43%1009.5 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrSW5N8N7--N11N7NE6NE5NE3NE8E7E8E9E9E9E11E13E12
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1 day agoSE12SE17SE19
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2 days agoE13E11E12E11E11E11E5E7E9SE7SE9E7SE9SE9SE9SE10SE16S16S17SE17SE15SE13SE12SE14

Tide / Current Tables for Eagle Point, Texas
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Eagle Point
Click for Map
Tue -- 05:34 AM CST     Moonset
Tue -- 07:11 AM CST     Sunrise
Tue -- 12:40 PM CST     -0.49 feet Low Tide
Tue -- 03:56 PM CST     Moonrise
Tue -- 05:52 PM CST     Sunset
Tue -- 09:04 PM CST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.60.60.60.60.50.40.2-0-0.2-0.4-0.5-0.5-0.4-0.3-00.20.40.60.70.80.70.7

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Tue -- 05:33 AM CST     Moonset
Tue -- 07:08 AM CST     -1.91 knots Max Ebb
Tue -- 07:10 AM CST     Sunrise
Tue -- 12:03 PM CST     0.00 knots Slack
Tue -- 03:49 PM CST     1.97 knots Max Flood
Tue -- 03:56 PM CST     Moonrise
Tue -- 05:52 PM CST     Sunset
Tue -- 11:01 PM CST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.8-1-1.2-1.4-1.6-1.8-1.9-1.9-1.7-1.3-0.8-00.81.51.921.81.61.31.10.80.40

Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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