Sunday, January19, 2020
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Marine Weather and Tides
Clear Lake Shores, 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 5:48PM Sunday January 19, 2020 5:10 AM CST (11:10 UTC) Moonrise 2:23AMMoonset 1:33PM Illumination 32% Phase: Waning Crescent; Moon at 24 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- 339 Am Cst Sun Jan 19 2020
.small craft advisory in effect until noon cst today...
.small craft should exercise caution from this afternoon through Monday morning...
Today..Northeast winds 15 to 20 knots. Bay waters choppy.
Tonight..North winds 10 to 15 knots. Bay waters slightly choppy.
Monday..North winds 10 to 15 knots becoming northeast 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Monday night..Northeast winds 5 to 10 knots. Bay waters smooth.
Tuesday..East winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday night..East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers in the late evening and overnight.
Wednesday..East winds 15 to 20 knots. Bay waters choppy. A chance of showers early in the morning, then showers likely in the late morning and afternoon. Isolated Thunderstorms late in the afternoon.
Wednesday night..Southeast winds 15 to 20 knots decreasing to 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight. Showers likely and isolated Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Thursday night..South winds 5 to 10 knots becoming northwest after midnight. Bay waters smooth becoming smooth to slightly choppy after midnight. A chance of showers and isolated Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 339 Am Cst Sun Jan 19 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Strong northeast winds will persist well into the week. Strong easterly winds should maintain higher sea heights while pushing higher water onto the coast. This may cause minor coastal flooding during high tide. The approach and passage of a western disturbance to be followed by an early Friday cold front will increase mid to late work week precipitation chances.


7 Day Forecast for Marine Location Near Clear Lake Shores, TX
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location: 29.55, -95     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 190956 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 356 AM CST Sun Jan 19 2020

SHORT TERM [Tonight through Tomorrow].

Post-frontal northerlies will remain pronounced through the day as a near 1034 mb high over Oklahoma presses a tight offshore gradient across the region. Inland brisk northeast winds should range in the 15-20 mph, 25 mph in gust / coastal near 20 mph, 30 mph in gust through the day. Mostly sunny skies with temperatures sluggishly warming into the average middle 50s and low 30-40% humidities within this cold air advection pattern.

Overnight north breezes will make Monday's sunrise conditions 'feel' like freezing within dry air mass as interior temperatures fall into the 30s shortly after midnight. Monday will be another very pleasant, dry and cool day but with a much weaker northeast wind. The afternoon will again slowly warm into the middle 50s under continued low relative humidities. 31

LONG TERM [Tuesday Through Sunday].

After a cold morning on Tuesday (lows in the 30s inland and 40s near the coast), clouds will begin their return as surface high pressure moves off to the east and onshore winds make their way back to the area. Look for highs on Tuesday to peak in the 50s for a majority of the area (maybe getting into the lower 60s around our southwest counties). A strengthening onshore flow Tuesday night leads to rising moisture levels, and expect to see rising rain chances from west to east as the overnight hours progress. Low temperatures should be in the 40s inland and in the 50s near the coast. The Wednesday-Thursday time period is looking cloudy and wet with periods of showers (maybe some isolated thunderstorms too) as the next storm system slowly organizes/intensifies as it moves eastward across the Southern Plains. In the Wednesday afternoon through Thursday morning time period, there are some indications by the models that locally heavy rainfall might be possible with this system near the coast and offshore. Currently have rainfall totals for this event ranging from around 1/2 to 1 inch north to close to 2 inches near the coast and offshore. The cold front with this system eventually moves through the area (late Thursday or early Friday?) and dries things out. We could see highs in the 60s/70s on Thursday, and that will probably be the warmest day of the week. Behind the front, generally expecting to see lows back down in the 30s/40s and highs in the 50s/60s. Will be carrying near normal late January temperatures and a mostly dry forecast for the weekend. 42

MARINE.

Strong 20-25 knot, with occasional gusts to 35 knots, north to northeast winds over the far offshore waters will maintain rough bay conditions and drive nearshore significant wave heights up 5 to 7 feet, 7 to around 11 foot heights offshore. Thus, Small Craft Advisory flags will remain in place through the morning. Winds will fall off to Caution criteria over the local bays this afternoon with sustained northeast winds remaining above 20 knots over the Gulf that will keep Advisory flags up through Monday morning. Monday through Wednesday's easterlies will remain moderate to strong as Plains high pressure advances east and maintains a tight east-to- west pressure gradient across the NW Gulf. This long duration east fetch will begin piling up water along eastern-facing beaches at mid week. Wednesday and Thursday water levels will likely reach and exceed 3 ft above MLLW during times of high tide. During this time, the passage of a western mid-week shortwave trough will increase shower and thunderstorm chances to likely. 31

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 57 34 56 35 58 / 0 0 0 0 0 Houston (IAH) 57 36 58 38 56 / 0 0 0 0 0 Galveston (GLS) 57 42 56 48 56 / 0 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . Small Craft Advisory until noon CST today for the following zones: Galveston Bay . Matagorda Bay.

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

Small Craft Advisory until noon CST Monday 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.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi59 min 53°F 64°F1025.8 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi59 min 51°F 64°F1026.9 hPa
GRRT2 18 mi59 min 55°F 63°F1025.2 hPa
NCHT2 - 8770777 - Manchester, TX 19 mi59 min 50°F 67°F1026.8 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi59 min 53°F 62°F1024.5 hPa
GTOT2 20 mi59 min 53°F 63°F1025.6 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi53 min 52°F 58°F1025.7 hPa
HIST2 32 mi59 min 50°F 64°F1025.5 hPa
LUIT2 33 mi53 min 55°F 64°F1026.5 hPa
KXIH 36 mi36 min NNE 29 55°F
42035 - GALVESTON 22NM East of Galveston, TX 38 mi31 min 25 G 29 1026.2 hPa
FCGT2 - 8772447 - USCG Freeport, TX 45 mi53 min 52°F 66°F1026.1 hPa
FPST2 45 mi59 min 52°F 69°F1025.4 hPa

Wind History for Eagle Point, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi2.3 hrsN 1210.00 miPartly Cloudy52°F39°F62%1026.4 hPa
Houston, Pearland Regional Airport, TX13 mi78 minNNE 13 G 2210.00 miFair52°F36°F55%1027.1 hPa
Houston, Houston Hobby Airport, TX16 mi78 minN 1410.00 miPartly Cloudy51°F35°F54%1027.3 hPa
Galveston, Scholes Field, TX21 mi79 minNNE 25 G 3210.00 miFair and Windy56°F42°F60%1026 hPa
John Dunn Helistop, TX24 mi76 minN 1310.00 miFair50°F32°F50%1026.7 hPa

Link to 5 minute data for KEFD

Wind History from EFD (wind in knots)
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Last 24hrS5S6S8S5CalmS3S5CalmW6W4SE4W3--N10N10N9N12
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1 day agoE6E8E7E10E10E10E13E10E12E11E15E13E12E12E12E12E12SE7SE6SE8S9S6S5S4
2 days ago--CalmE3E5E5E6E9--E7--SE7SE7E8SE7--E8E12E12E8E9E9E10E7NE8

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Sun -- 02:24 AM CST     Moonrise
Sun -- 04:00 AM CST     0.51 feet High Tide
Sun -- 07:15 AM CST     Sunrise
Sun -- 12:38 PM CST     -0.35 feet Low Tide
Sun -- 01:33 PM CST     Moonset
Sun -- 05:46 PM CST     Sunset
Sun -- 08:30 PM CST     0.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.50.50.50.50.40.30.1-0-0.2-0.3-0.3-0.3-0.3-0.100.20.40.50.60.60.60.5

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sun -- 02:22 AM CST     Moonrise
Sun -- 05:18 AM CST     -1.88 knots Max Ebb
Sun -- 07:13 AM CST     Sunrise
Sun -- 09:26 AM CST     0.00 knots Slack
Sun -- 01:08 PM CST     2.01 knots Max Flood
Sun -- 01:32 PM CST     Moonset
Sun -- 05:45 PM CST     Sunset
Sun -- 07:07 PM CST     -0.00 knots Slack
Sun -- 09:46 PM CST     -0.56 knots Max Ebb
Sun -- 11:26 PM CST     -0.50 knots Min Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.5-1-1.4-1.7-1.9-1.8-1.6-1.1-0.40.51.31.821.91.61.20.80.40-0.3-0.5-0.6-0.5

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 (6,6,7,8)
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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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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.