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Marine Weather and Tides
Version 3.4 |
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 7:06AM | Sunset 7:57PM | Monday August 26, 2019 3:57 AM CDT (08:57 UTC) | Moonrise 1:53AM | Moonset 3:59PM | Illumination 18% |  |
GMZ130 Laguna Madre From The Port Of Brownsville To The Arroyo Colorado- Laguna Madre From The Arroyo Colorado To 5 Nm North Of Port Mansfield Tx- Laguna Madre From 5 Nm North Of Port Mansfield To Baffin Bay Tx- 939 Pm Cdt Sun Aug 25 2019
.small craft advisory may be needed Monday...
Rest of tonight..South winds 10 knots. A light chop on the bay. Patchy light rain ending near the port of brownsville before midnight.
Monday..South winds 10 to 15 knots becoming southeast near 20 knots and gusty in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Monday night..Southeast winds 15 to 20 knots becoming south 10 to 15 knots after midnight. Choppy on the bay subsiding to a moderate chop after midnight.
Tuesday..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Tuesday night..Southeast winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Choppy on the bay subsiding to a moderate chop after midnight.
Wednesday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Wednesday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Thursday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon.
Thursday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Friday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon. Slight chance of showers and Thunderstorms.
Friday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight. Slight chance of showers and Thunderstorms.
.small craft advisory may be needed Monday...
Rest of tonight..South winds 10 knots. A light chop on the bay. Patchy light rain ending near the port of brownsville before midnight.
Monday..South winds 10 to 15 knots becoming southeast near 20 knots and gusty in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Monday night..Southeast winds 15 to 20 knots becoming south 10 to 15 knots after midnight. Choppy on the bay subsiding to a moderate chop after midnight.
Tuesday..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Tuesday night..Southeast winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Choppy on the bay subsiding to a moderate chop after midnight.
Wednesday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Wednesday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Thursday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon.
Thursday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Friday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon. Slight chance of showers and Thunderstorms.
Friday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight. Slight chance of showers and Thunderstorms.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 939 Pm Cdt Sun Aug 25 2019
Synopsis..High pressure centered over the eastern gulf combined with a thermal trough of low pressure from west texas through the sierra madre will maintain moderate to locally strong southeast winds and moderate seas through Tuesday. The ridge will weaken and slide into the western gulf beginning Wednesday and continuing through Friday with diminishing winds and slowly subsiding seas. Isolated to scattered Thunderstorms today should become few to none Monday through Wednesday with some return by Thursday through Friday night.
Synopsis..High pressure centered over the eastern gulf combined with a thermal trough of low pressure from west texas through the sierra madre will maintain moderate to locally strong southeast winds and moderate seas through Tuesday. The ridge will weaken and slide into the western gulf beginning Wednesday and continuing through Friday with diminishing winds and slowly subsiding seas. Isolated to scattered Thunderstorms today should become few to none Monday through Wednesday with some return by Thursday through Friday night.
7 Day Forecast for Marine Location Near Laguna Vista, TX
Hourly EDIT Helplocation: 26.14, -97.28 debug
Area Discussion for - Brownsville, TX
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 kbro 260551 aab afdbro area forecast discussion... Updated national weather service brownsville tx 1251 am cdt Mon aug 26 2019 Discussion Updated for latest aviation discussion below. Aviation Light south-southeast winds with a few passing mid to high level clouds prevail across the area early this morning. ExpectVFR conditions for the next 24 hours as mid level ridging builds into the region. Light southeast to south winds overnight will quickly increase by late morning with some gusts around 25 knots in the afternoon. Prev discussion issued 835 pm cdt Sun aug 25 2019 discussion... Once again this evening, convection fired into fairly robust clusters of strong to severe storms, with the most intense causing wind damage in western willacy county where radar was estimating 70+ mph winds as the microburst surged through. That was the second act of a tornadic mini-supercell in western kenedy county with eerie similarities to june 24th, the "sequel" to the 2018 great flood. That's where the similarities ended, fortunately, as plume and push of very dry mid level air won the battle... And will set the stage for continued heat (and a likely new august monthly heat record for much of the rgv) for much of the upcoming week, along with largely rain-free weather. That rain-free trend begins overnight... Based on the "worked over" atmosphere this evening and the filtering of the deeper dry air later tonight. Given these trends, have reduced precipition gradually this evening, and cut off completely by 10 pm - with the main leftovers "debris" stratiform rain in the lower valley through the western gulf. No changes for Monday... But as previously mentioned the heat will surge in low level south to even southwesterly (off the deck) flow with thicknesses well above average. Plenty of surface rh as well so advisories are looking more likely... And would not surprise if readings edge over 115 for several hours and require warnings particularly across the rgv if mixing of drier air higher up can't erode the surface dewpoints enough. Stay tuned. No further changes... Digital forecasts have been published and text products to follow shortly. Update - 52 bsg aviation... Apologies for the late discussion on the 00z forecast but elected to combine overall discussion into one based on gridded forecast changes as well as tracking following up with the strong severe thunderstorms for a few hours earlier. After adding convection into the tafs through 8 pm, overnight will see anvil cirrus for several hours which should become scattered after midnight. Surface winds were disrupted by the convection but will come back to a less than 10 knot average overnight. Could see patchy MVFR conditions but expect only very short periods of ceiling if at all. As the aforementioned atmospheric dry air spreads south on Monday, forecast shifts to a wind-cast as atmospheric rh values drop noticeably. This should keep clouds to few-scattered MVFR cumulus all day. South to southeast winds will pick up quickly by mid to late morning and a pretty gusty afternoon is likely with sustained winds edging to 20 knots or so as thermal trough enhances the pressure gradient. 52 bsg prev discussion... Issued 322 pm cdt Sun aug 25 2019 short term (now through Monday night): another round of showers and thunderstorms is underway, as a weak mid-level trough persists across the western gulf and the diurnal seabreeze develops just inland. Radar imagery indicates numerous convection across brooks and kenedy counties, as well as the lower rgv. High-resolution convective models are in pretty good agreement with this convection expanding and moving gradually west-southwestward across deep south texas through the evening. The hrrr in particular has been fairly consistent, showing a few stronger cells possible. Though a marginally-severe storm cannot be ruled out, heavy rain will be the main threat this evening. 12z kbro sounding from this morning measured record-level moisture, with precipitable water values of |
2.41 inches. This will undoubtedly lead to locally heavy downpours with torrential rainfall rates. Most of the region is under drought conditions, however, any rainfall rates exceeding 1 to 2 inches per hour would cause some flooding issued in low-lying and urban areas. Tonight into Monday, the mid-level trough will pivot northeastward away from the region. Drier air will then filter back in, keeping rain chances low the rest of the period. The heat will continue with mid-level heights around 591 to 592dam along with surface dew points in the mid to upper 70s across the rgv. This will lead to heat indices exceeding 110 for much of the area and up to 115 across the inland coastal counties and lower rgv. Therefore, another heat advisory will be likely tomorrow. Long term (Tuesday through Sunday): latest nwp guidance remains rather consistent with previous forecast through the long-term, with perhaps some changes in sight by later next weekend. On Tuesday, 500-mb high center will lie roughly near elp, with ridge axis extending into the western gulf of mexico. The center of this subtropical high is progged to drift gradually westward through Friday, before drifting northward next weekend. This will maintain rather hot and humid conditions through Thursday, with only very slight (silent) rain chances. Should note that the ECMWF still holds the ridging somewhat stronger vs. The GFS during this period. Will continue to lean in the ecm's direction, per continuity with previous forecast. With little change in guidance, both temps and pop's were left largely alone for this package. Still looks like a heat advisory may be required on Tuesday, with heat indices reaching into the 110-114 degree range across much of the cwa. Thereafter, slowly receding heights and gradually backing weakening winds (south of a front stalled out over east northeast texas) should take a little edge off of the heat, with temps closer to climo norms by around Friday. For Friday, and perhaps more so into next weekend, another weakness aloft develops with the high center well off to the northwest. This should allow column rh to deepen, with a slight chance of sea-breeze showers and storms on Friday, increasing to a chance for next Saturday and Sunday. 12z run of ecm appears to have come into better agreement with GFS on this, after taking a quick look. Speaking of the ecm (and looking way ahead), last night's 00z run wanted to bring a frontal boundary, with plenty of moisture, through the area around labor day (02 sep). 12z run brings a tropical circulation of some sort into the western gulf from the east around this time. So confidence isn't especially high beyond Saturday. Have trended pop's up to around 30% in this timeframe for now, though. Marine (now through Monday night): the pressure gradient has tightened a bit today as pressure decreases across the tx panhandle, leading to stronger southeast winds along the bay today. Small craft will need to exercise caution the rest of the afternoon and into tonight as winds remain elevated. Moderate winds are expected again on Monday along with low to moderate seas across the gulf waters, though thunderstorm chances will quickly diminish through Monday and Monday night. Tuesday through Saturday: still anticipating moderate-to-fresh south-to-southeasterly breezes and generally moderate seas around 4 feet on Tuesday, courtesy of an enhanced pressure gradient. Small craft exercise caution wording will likely be needed Tuesday daytime on the laguna madre and perhaps on the nearshore gulf waters as well. The pressure gradient will then become weaker through the rest of the period, as a front stalls across north texas, resulting in light to modest southeasterly winds and favorable seas. At times, rain showers and isolated thunderstorms will be possible starting Wednesday, generally offshore, then expanding to all of the coastal waters beginning Thursday. There could be locally higher winds and seas in any storms. Bro watches warnings advisories Tx... None. Gm... None. This product is also available on the web at: http: weather.Gov rgv 63 |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| PTIT2 - 8779770 - Port Isabel, TX | 6 mi | 58 min | SSE 12 G 15 | 84°F | 83°F | 1008.6 hPa (-1.0) | ||
| BZST2 | 8 mi | 64 min | S 9.9 G 12 | 81°F | 78°F | 1008 hPa | ||
| PCGT2 - 8779748 - South Padre Island CGS, TX | 8 mi | 58 min | S 11 G 13 | 82°F | 1008.9 hPa (-0.5) | |||
| RLIT2 | 8 mi | 64 min | SSE 11 G 13 | 86°F | 85°F | 1008 hPa | ||
| PMNT2 | 30 mi | 64 min | 82°F | 88°F | 1008.4 hPa | |||
| RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX | 47 mi | 58 min | S 6 G 8.9 | 83°F | 86°F | 1008.1 hPa (-0.6) |
Wind History for South Padre Island C.G Station, TX
(wind in knots) EDIT (on/off) Help| 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | |
| Last 24hr | SE | SE | SE | S | SE | SE G11 | S | SE G15 | SE G17 | SE G19 | SE G19 | SE G17 | SE G16 | SE G14 | SE G14 | SE | SE | S | S G11 | S | SE | SE | S G17 | S |
| 1 day ago | S | W G5 | SE | SE | S | SE | SE | SE | SE | SE | SE | SE G14 | SE G13 | SE | SE | SE | SE G7 | S | S | SW | SE | SE | SE | SE |
| 2 days ago | S | SE | SE | SE | SW | SE G8 | SE | E | E G14 | SE | SE G13 | E | SE G16 | SE G15 | SE G13 | SE | SE | SE | SE | SE | SE | SE | SE G11 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Port Isabel, Port Isabel-Cameron County Airport, TX | 3 mi | 2.1 hrs | S 10 | 9.00 mi | Fair | 83°F | 78°F | 85% | 1008.3 hPa |
| Brownsville, Brownsville / South Padre Island International Airport, TX | 18 mi | 2.1 hrs | SSE 11 | 10.00 mi | Fair | 84°F | 82°F | 94% | 1008.5 hPa |
| Harlingen, Rio Grande Valley International Airport, TX | 22 mi | 2.1 hrs | SSE 10 | 8.00 mi | Fair | 82°F | 80°F | 94% | 1008.3 hPa |
Link to 5 minute data for KPIL
Wind History from PIL (wind in knots)
| 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | SE | SE | S | S | S | S | S | SE G25 | SE G27 | SE G23 | SE G27 | SE G23 | SE | SE | S | SE | S | S | S | |||||
| 1 day ago | S | SE | SE | SE | SE | SE | S | S | SE | S | S G17 | SE G22 | SE G25 | SE G23 | SE G23 | SE | SE G23 | SE | S | SE | ||||
| 2 days ago | S | S | SE | S | S | SE | SE | E | E | E G22 | E | SE | E G23 | E | SE | SE | SE | S |
Tide / Current Tables for Port Isabel, Texas
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPort Isabel
Click for Map
Mon -- 02:52 AM CDT Moonrise
Mon -- 04:36 AM CDT 1.57 feet High Tide
Mon -- 07:06 AM CDT Sunrise
Mon -- 04:57 PM CDT Moonset
Mon -- 07:01 PM CDT -0.22 feet Low Tide
Mon -- 07:54 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:52 AM CDT Moonrise
Mon -- 04:36 AM CDT 1.57 feet High Tide
Mon -- 07:06 AM CDT Sunrise
Mon -- 04:57 PM CDT Moonset
Mon -- 07:01 PM CDT -0.22 feet Low Tide
Mon -- 07:54 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.1 | 1.3 | 1.4 | 1.5 | 1.6 | 1.6 | 1.5 | 1.5 | 1.4 | 1.4 | 1.3 | 1.2 | 1.1 | 0.9 | 0.7 | 0.4 | 0.2 | -0 | -0.2 | -0.2 | -0.2 | -0 | 0.2 | 0.5 |
Tide / Current Tables for Port Isabel, Texas (2)
EDIT (on/off) Help One Week of DataPort Isabel
Click for Map
Mon -- 02:52 AM CDT Moonrise
Mon -- 04:52 AM CDT 1.51 feet High Tide
Mon -- 07:06 AM CDT Sunrise
Mon -- 04:57 PM CDT Moonset
Mon -- 06:56 PM CDT -0.14 feet Low Tide
Mon -- 07:54 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:52 AM CDT Moonrise
Mon -- 04:52 AM CDT 1.51 feet High Tide
Mon -- 07:06 AM CDT Sunrise
Mon -- 04:57 PM CDT Moonset
Mon -- 06:56 PM CDT -0.14 feet Low Tide
Mon -- 07:54 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.9 | 1.1 | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.2 | 1 | 0.7 | 0.4 | 0.1 | -0.1 | -0.1 | -0.1 | 0 | 0.2 | 0.4 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES 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 Brownsville, TX (4,6,7,8)
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Ground Weather Radar Station Brownsville, TX
(on/off) Help
Gulf Stream Current
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Disclaimer: 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 numerious 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. |