Monday, March30, 2020
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Marine Weather and Tides
Bolivar Peninsula, 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 7:10AMSunset 7:37PM Sunday March 29, 2020 11:27 PM CDT (04:27 UTC) Moonrise 9:26AMMoonset 11:28PM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 947 Pm Cdt Sun Mar 29 2020
Rest of tonight..East winds 5 to 10 knots. Bay waters smooth. A slight chance of showers early in the evening. A slight chance of showers after midnight.
Monday..East winds around 10 knots becoming southeast in the afternoon. Bay waters smooth to slightly choppy becoming slightly choppy in the afternoon. A chance of showers in the morning, then a slight chance of showers early in the afternoon. A chance of showers and a slight chance of Thunderstorms late in the afternoon.
Monday night..South winds around 10 knots becoming southwest after midnight. Bay waters smooth to slightly choppy. A slight chance of showers.
Tuesday..West winds 10 to 15 knots becoming northwest in the afternoon. Bay waters slightly choppy becoming smooth to slightly choppy in the afternoon.
Tuesday night..North winds 10 to 15 knots becoming northeast after midnight. Bay waters slightly choppy.
Wednesday..East winds 10 to 15 knots becoming around 10 knots in the afternoon. Bay waters slightly choppy becoming smooth to slightly choppy in the afternoon.
Wednesday night..Southeast winds 5 to 10 knots. Bay waters smooth.
Thursday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms in the afternoon.
Thursday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
Friday..Southeast winds around 10 knots. Bay waters smooth to slightly choppy. A chance of showers and Thunderstorms.
Friday night..Southeast winds 5 to 10 knots becoming east after midnight. Bay waters smooth. 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 947 Pm Cdt Sun Mar 29 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Winds and waves are slowly diminishing this evening. Winds will become more southeasterly late tonight into Monday as high pressure moves off to the east. Another cold front is currently expected to move off the coast by Tuesday afternoon.


7 Day Forecast for Marine Location Near Bolivar Peninsula CDP, TX
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location: 29.49, -94.56     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 300202 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 902 PM CDT Sun Mar 29 2020

UPDATE.

Despite a fairly poor appearance in satellite imagery, we've managed to squeeze a handful of lightning strikes out of scattered convection up north. Have retooled the forecast for observational trends, particularly PoPs/Thunder.

The broad forecast seems on track through tomorrow night, so while some tweaks have been made, the most major changes in the forecast remain the near term fixes to precip in the first few hours. We'll be continuing to focus on the northward lift of a warm front underneath a shortwave trough aloft to support lift for showers and some thunderstorms. The probability for severe weather is non-zero, but the environment overall does not look terribly supportive for organized severe weather. This is reflected in the Marginal Risk north of the Houston metro in SPC's Day 2 Outlook. A further update can be expected overnight, both from this office and SPC's overnight Day 1 Outlook.

PREV DISCUSSION /Issued 630 PM CDT Sun Mar 29 2020/.

AVIATION [00Z TAF Issuance].

Some scattered showers currently showing on radar across the northern zones, and as a result have included TEMPO wording for the next few hours at CLL, CXO, and UTS. Despite this, conditions look to remain within VFR thresholds as we head into the evening hours. Main weather concern for the current TAF period looks to be the slow approach of a warm front overnight and into tomorrow morning. As the boundary advances inland, look for a redevelopment of onshore winds and increased moisture. As a result, should see cigs drop into the MVFR range by the morning, with scattered showers developing along the coast before sunrise and gradually spreading further inland through the afternoon. By tomorrow evening, most locations should begin to see winds out of the south at around 10 knots.

Cady

PREV DISCUSSION. /ISSUED 410 PM CDT Sun Mar 29 2020/

SHORT TERM (Tonight through Monday) .

Moisture return appears to be coming back a bit faster than previously thought with the air mass over SE TX showing signs of becoming capable of sustaining showers. This trend will be continuing tonight and as we see a few more shortwaves approach/move across from the west overnight and the warm front moves in from the Gulf early tomorrow morning, rain chances will be going up during this time frame. Low temperatures will not be as cool as last night . ranging from the lower 60s over the far northern counties to the upper 60s/lower 70s along the immediate coast. Tomorrow should be more humid but with the increased POPs/clouds . the highs are expected to be pretty close to today's (upper 70s/lower 80).

Of note for tomorrow, SPC has nudged the Marginal/Slight Risk lines a little more north of the CWA this afternoon. And with the latest runs in good agreement with the movement of the warm front north and track of the shortwaves, the better dynamics should be north of the FA. But that being said, most of the area will see scattered showers through- out the day tomorrow. 41

LONG TERM (Monday night through Sunday) .

The shortwave trough passing east of the area will be into the Midwest by late Tuesday morning. A surface low will also be traveling across northern Texas overnight and its eastern exit into MS-AL will initiate a northerly wind shift on Tuesday. This frontal passage will usher in a dry air mass. Other than higher northeastern forecast area/county higher light precipitation chances . this will be a dry boundary passage. Pwats will fall from tomorrow's 1.8 inches (upper 60 to lower 70 dew points) to around 0.5 inches (mid to upper 50 dew points) by Tuesday afternoon. Transitory upper ridging will pass across on Wednesday thus affording a couple of very pleasant mid week days. Tuesday's northerly winds will veer around the eastern side of the dial through Wednesday morning and be back onshore by Wednesday evening. A very dry lower sfc-500 mb column will likely just have thinner mid to high level cloud cover coming over from the west with enough sun to warm the resident drier air mass well into the upper 70s to middle 80s both Tuesday and Wednesday. This drier air will be best felt early in the morning as early Wednesday's temperatures fall into the cooler areawide 50s.

The late week weather pattern will take a turn to becoming more humid, overcast and wet. A series of weak shortwave troughs traversing across the Plains, along with pockets of higher PVA caught up in the west-southwest flow, will increase Thursday's precipitation chances. A frontal passage on Friday will also keep at least a moderate chance for showers and thunderstorms in the Friday forecast. Late work week conditions will be slightly cooler under a string of overcast days and episodes of periodic showers with embedded thunderstorms. At this time, it is very difficult to discern any particular trigger or focus of the when and where the highest precipitation will occur. At this point, the overall trend is to go from mostly overcast and cooler Thursday and Friday to drier, partially cloudy and slightly warmer-than- normal weekend conditions . mornings in the low to mid 60s and afternoons warming up into the upper 70s to lower 80s. 31

MARINE .

Winds/seas over the coastal waters should be decreasing a bit tonight as the latest upper level shortwave moves out and the gradient begins to weaken. With the warm front moving inland early Mon morning, winds are going to become more SE through the day. Isolated showers will be possible as the WAA deepens. The next cold front is still on track to push into the coastal waters by early Tues afternoon . with generally light/moderate N/NE winds developing behind the front on through Tues night/early Weds morning. Southeast winds are forecast to return Weds night . strengthening Thurs/Fri with with the return of unsettled wx. 41

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 63 78 61 77 53 / 100 80 70 0 0 Houston (IAH) 65 81 68 82 57 / 50 40 40 0 0 Galveston (GLS) 71 78 72 81 63 / 30 40 20 0 0

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . None.



UPDATE . Luchs SHORT TERM . 41 LONG TERM . 31 AVIATION . Cady MARINE . 41


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RLOT2 - 8770971 - Rollover Pass, TX 3 mi57 min ENE 9.9 G 12 73°F 73°F1019.1 hPa
HIST2 12 mi63 min N 2.9 G 5.1 69°F 75°F1018.9 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi63 min E 17 G 18 74°F 74°F1017.6 hPa
GTOT2 17 mi57 min E 7 G 11 74°F 74°F1018.4 hPa
42035 - GALVESTON 22NM East of Galveston, TX 19 mi37 min E 12 G 14 73°F 72°F3 ft1018.4 hPa68°F
EPTT2 - 8771013 - Eagle Point, TX 19 mi57 min NE 13 G 15 74°F 74°F1018.5 hPa
GRRT2 22 mi57 min ESE 12 G 15 74°F 74°F1018.3 hPa
MGPT2 - 8770613 - Morgans Point, TX 26 mi57 min NE 6 G 8.9 73°F 76°F1019.3 hPa
SBPT2 - 8770570 - Sabine Pass North, TX 40 mi63 min NE 8.9 G 11 71°F 77°F1021.1 hPa
TXPT2 40 mi57 min NNE 9.9 G 11
LUIT2 41 mi57 min E 12 G 15 73°F 72°F1019.6 hPa
NCHT2 - 8770777 - Manchester, TX 41 mi57 min ENE 7 G 9.9 74°F 74°F1018.8 hPa
PORT2 - 8770475 - Port Arthur, TX 42 mi57 min NNE 2.9 G 6 70°F 73°F1019.5 hPa

Wind History for Rollover Pass, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX22 mi35 minENE 910.00 miA Few Clouds75°F59°F58%1018.8 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrNE5N9N9N10N9NE9NE7NE10NE11NE10NE14NE14E15
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1 day agoSE9S16S15S13S14
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S11S10SE14SE14SE14SE13SE11S14S10S8S8S6S5S6NW14N14
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Tide / Current Tables for Rollover Pass, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Galveston Bay Entrance, Texas Current
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Galveston Bay Entrance
Click for Map
Mon -- 12:21 AM CDT     -1.94 knots Max Ebb
Mon -- 12:27 AM CDT     Moonset
Mon -- 06:17 AM CDT     0.00 knots Slack
Mon -- 07:10 AM CDT     Sunrise
Mon -- 10:12 AM CDT     1.58 knots Max Flood
Mon -- 11:08 AM CDT     Moonrise
Mon -- 05:06 PM CDT     -0.00 knots Slack
Mon -- 07:36 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.9-1.9-1.8-1.5-1.1-0.6-0.10.30.91.31.61.51.31.210.70.30-0.3-0.6-0.9-1-1.2-1.5

Weather Map
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wmap_A
GEOS Local Image of SouthCentralPlains    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 (0,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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