Monday, June21, 2021
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Marine Weather and Tides
Kemah, TX

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:19AMSunset 8:24PM Monday June 21, 2021 2:03 AM CDT (07:03 UTC) Moonrise 4:13PMMoonset 2:33AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 824 Pm Cdt Sun Jun 20 2021
.small craft advisory in effect through Monday morning...
Rest of tonight..South winds 15 to 25 knots. Bay waters choppy. A chance of scattered showers and Thunderstorms. Some Thunderstorms may produce gusty winds in the evening.
Monday..South winds 15 to 25 knots becoming 15 to 20 knots in the afternoon. Bay waters choppy. Scattered showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Tuesday..Southeast winds around 5 knots. Bay waters smooth. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Wednesday..Southeast 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 increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Thursday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Friday night..South 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 824 Pm Cdt Sun Jun 20 2021
Synopsis for high island to matagorda ship channel out 60 nm.. Moderate to strong onshore flow will prevail through Monday as low pressure over west texas deepens. Chances for scattered showers and Thunderstorms will persist through at least Monday morning. Wind and seas will be higher in and near the showers and Thunderstorms. Rain chances increase again Monday night through Tuesday as a cold front approaches the coast, but stalls inland. High pressure will build into the area on Tuesday afternoon with lighter winds developing toward the middle of the week.


7 Day Forecast for Marine Location Near Kemah, TX
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location: 29.55, -94.97     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 210340 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1040 PM CDT Sun Jun 20 2021

SHORT TERM [Tonight Through Monday Night]. Strong storms over the Gulf waters have been pushing out round after round of outflow with storms into the coastal areas. Small craft advisory issued. Very deep moisture (PW 2.1-2.3") piling up offshore should spread north during the early-mid morning hours and brings the possibility of heavy downpours across the areas along and south of the I-69 corridor. Gusty winds will be common as well with these storms though the wind threat may gradually diminish in the late morning hours. Rain rates with these storms may push the 2-2.5"/hour rate and could lead to some minor street flooding but overall storm motions should keep these moving not clustering up. Have bumped up the rain chances toward morning and into the afternoon. Afternoon could have two scenarios, rained out during the morning and only widely scattered-scattered storms probably up north . or outflow and deeper moisture and less worked over allows for more easily reaching convective temperatures with greater coverage in storms. Leaning toward the more worked over scenario but subject to change.

Cold front still pushing south Monday night/early Tuesday with wind shift to the northeast and scattered storms along the boundary.

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AVIATION [00/06Z TAF Issuance]. VFR with periods of SHRA/TSRA over the coastal sites tonight that could bring gusty winds and briefly MVFR. Toward morning shifting inland and bringing potential impacts to HOU/IAH. VCSH/VCTS will remain in the forecast through much of the day though possible break if it gets worked over enough in the morning. 45

PREV DISCUSSION /Issued 326 PM CDT Sun Jun 20 2021/.

LONG TERM. [Tuesday through Sunday]

A long wave trough over the Great Lakes will extend into SE TX Tuesday morning. Showers and thunderstorms will likely be ongoing Tuesday morning as the trough axis moves east. There could be brief window of locally heavy rain early Tuesday if training develops as hinted by the NAM12. The trough axis will move east by afternoon and rain chances should trend lower as the day progresses and upper level ridging over the desert southwest begins to expand eastward. The expanding upper ridge does not look as strong as the last upper level ridge with 500 mb heights between 591-593 DM. SE TX will also lie on the eastern edge of the ridge so it's plausible to get some isolated showers and storms each afternoon with differential heating. Will carry lowish PoPs through the end of the work week but most areas will likely remain dry. MaxT values will be warm but it is the end of June and mid 90's is pretty close to climo so it's looking rather typical.

Things get a bit more interesting next weekend as a short wave trough moves across the northern plains and the upper ridge over Texas retreats to the SW US. The short wave digs into the southern plains, carving out a deep long wave trough that will once again dip into Texas. Surface low pressure will develop over the Ozark plateau and this feature will move east but in doing so, it will drag a cold front into the state. The combination of the front and lower heights courtesy of the trough will provide SE TX with a chance of showers and thunderstorms late Saturday into Sunday. The front will stall over the northern half of the CWA but clouds and precip will offer some relief from the heat. The trough will move east by next Monday and upper level ridging will develop over the Rockies and expand into Texas. 43

MARINE.

Onshore winds will increase tonight as low pressure deepens over West Texas. A Small Craft Advisory is in effect for the Gulf waters tonight into early Monday. The pressure gradient will relax late Monday as a weak cold front moves into SE TX and the gradient begins to relax. A light to moderate onshore flow is expected for the second half of the work week with high pressure over the eastern Gulf and lower pressures over the western high plains. The flow over the Gulf will be slightly higher at night/lighter during the day while winds over the bays will be slightly stronger during the day and lighter at night (typical for summer). Onshore winds will persist into next weekend. A weak front will move into SE TX next weekend but will stall well north of the coastal waters. 43

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 77 93 72 87 74 / 10 30 70 30 0 Houston (IAH) 78 91 76 90 76 / 50 60 70 60 10 Galveston (GLS) 81 89 80 89 81 / 60 40 70 70 20

HGX WATCHES/WARNINGS/ADVISORIES.

TX . High Rip Current Risk until midnight CDT tonight for the following zones: Bolivar Peninsula . Brazoria Islands . Galveston Island . Matagorda Islands.

GM . SMALL CRAFT SHOULD EXERCISE CAUTION through Monday morning for the following zones: Matagorda Bay.

Small Craft Advisory until 10 AM CDT 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 . Galveston 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.



SHORT TERM . 45 LONG TERM . Batiste


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi46 min S 21 G 27 84°F 86°F1009 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi46 min S 15 G 19 83°F 86°F1009.6 hPa
GRRT2 18 mi46 min SSE 17 G 22 83°F 85°F1008.8 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 19 mi52 min S 25 G 32 84°F 85°F1008.8 hPa
GTOT2 19 mi46 min S 8 G 22 83°F 87°F1009.4 hPa
NCHT2 - 8770777 - Manchester, TX 20 mi46 min S 8 G 13 82°F 85°F1009 hPa
RLOT2 - 8770971 - Rollover Pass, TX 24 mi46 min S 13 G 19 82°F 85°F1009.4 hPa
HIST2 31 mi46 min S 11 G 19 82°F 86°F1009.6 hPa
LUIT2 34 mi46 min SSE 19 G 25 84°F 85°F1009 hPa
42035 - GALVESTON 22NM East of Galveston, TX 37 mi34 min SSE 23 G 29 84°F 85°F1009 hPa
FPST2 46 mi46 min SE 23 G 27 84°F 84°F1008.1 hPa

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX12 mi2.2 hrsSE 1110.00 miPartly Cloudy79°F75°F89%1010.5 hPa
Houston, Pearland Regional Airport, TX15 mi71 minS 910.00 miPartly Cloudy82°F76°F82%1010.3 hPa
Houston, Houston Hobby Airport, TX18 mi71 minSSE 1010.00 miPartly Cloudy83°F75°F77%1010 hPa
Galveston, Scholes Field, TX20 mi72 minSSE 24 G 2810.00 miPartly Cloudy and Windy84°F77°F80%1010.4 hPa

Link to 5 minute data for KEFD

Wind History from EFD (wind in knots)
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Last 24hrS6S4SE4SE4----CalmCalmS5S10S6S11
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1 day agoSE3SW3SW5SW7W6W4W4NW6NW6NW3CalmCalmS5S5SE9SE10E12SE13S13S9S7S9S7S5
2 days agoCalm--CalmCalmCalmCalmN5--N7NE8NE11E8NE7E10E4NE6E9E4NE3E3CalmCalmS3S2

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Mon -- 02:08 AM CDT     -0.07 feet Low Tide
Mon -- 03:33 AM CDT     Moonset
Mon -- 06:20 AM CDT     Sunrise
Mon -- 09:33 AM CDT     0.87 feet High Tide
Mon -- 02:41 PM CDT     0.73 feet Low Tide
Mon -- 05:13 PM CDT     Moonrise
Mon -- 06:09 PM CDT     0.80 feet High Tide
Mon -- 08:23 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0-0.1-00.10.20.40.60.80.90.90.80.80.80.70.70.80.80.80.80.70.60.40.2

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Mon -- 02:36 AM CDT     2.17 knots Max Flood
Mon -- 03:32 AM CDT     Moonset
Mon -- 06:20 AM CDT     Sunrise
Mon -- 07:33 AM CDT     -0.00 knots Slack
Mon -- 10:45 AM CDT     -0.65 knots Max Ebb
Mon -- 01:43 PM CDT     -0.29 knots Min Ebb
Mon -- 05:12 PM CDT     Moonrise
Mon -- 07:26 PM CDT     -2.27 knots Max Ebb
Mon -- 08:21 PM CDT     Sunset
Mon -- 11:40 PM CDT     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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0.81.62.12.11.81.30.70.2-0.2-0.4-0.6-0.6-0.5-0.4-0.3-0.5-0.9-1.5-2-2.2-2.2-2-1.4-0.6

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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