Sunday, August25, 2019 L-36.com


Marine Weather and Tides
Port Mansfield, TX

Version 3.4
NOTICE
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 7:06AMSunset 7:59PM Sunday August 25, 2019 7:08 PM CDT (00:08 UTC) Moonrise 12:59AMMoonset 3:00PM Illumination 21% Phase: Waning Crescent; Moon at 25 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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GMZ132 Expires:201908260945;;203890 Fzus54 Kbro 252131 Cwfbro Coastal Waters Forecast National Weather Service Brownsville Tx 431 Pm Cdt Sun Aug 25 2019 Lower Texas Coastal Waters From Baffin Bay To The Mouth Of The Rio Grande Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz130-132-135-260945- 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- 431 Pm Cdt Sun Aug 25 2019
.small craft should exercise caution through evening...
Rest of the afternoon and evening..Southeast winds 15 to 20 knots and gusty. Choppy on the bay. Scattered Thunderstorms...some with heavy rainfall reducing visibility to 1 nautical mile or less.
Overnight..South winds 10 to 15 knots. A moderate chop on the bay. Isolated showers and Thunderstorms in the evening.
Monday..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.
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- 431 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 light to moderate 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 Port Mansfield, TX
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location: 26.54, -97.4     debug


Area Discussion for - Brownsville, TX
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Fxus64 kbro 252022
afdbro
area forecast discussion
national weather service brownsville tx
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.

Preliminary point temps pops
Bayview port isabel 81 96 82 95 10 10 10 10
brownsville 81 100 82 97 10 10 10 10
harlingen 81 100 81 100 10 10 10 10
mcallen 82 103 82 102 20 10 0 10
rio grande city 81 104 81 103 20 10 0 10
south padre island 82 91 83 90 10 10 10 10

Bro watches warnings advisories
Tx... Heat advisory until 7 pm cdt this evening for txz251-253>257-351-
353.

Gm... None.

This product is also available on the web at:
http: weather.Gov rgv
65-birchfield 53-schroeder


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMNT2 2 mi56 min 86°F 90°F1008.5 hPa
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 18 mi56 min SE 20 G 24 86°F 89°F1007.7 hPa
RLIT2 20 mi56 min SE 18 G 20 87°F 89°F1007.7 hPa
BZST2 35 mi56 min SE 12 G 13 83°F 81°F1007.8 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 35 mi56 min SE 11 G 14 83°F 1008.7 hPa
PTIT2 - 8779770 - Port Isabel, TX 35 mi56 min SE 17 G 19 85°F 82°F1008.4 hPa
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX 48 mi38 min SSE 16 G 21 86°F 85°F1008 hPa81°F

Wind History for Rincon Del San Jose, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Harlingen, Rio Grande Valley International Airport, TX26 mi76 minSSE 1710.00 miThunderstorm94°F73°F52%1006.8 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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Last 24hrSE15SE14SE10----S5SW3--Calm----SE7SE5--S11S15--S12
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1 day agoE17SE11SE11--------SE4SE3E3E3SE5E6E4SE7S10S10S76SE9SE7
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2 days ago--SE15--------------S6--SE7SE3--S7--4S5SE10--SE15
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--

Tide / Current Tables for Queen Isabella Causeway (east end), 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 Queen Isabella Causeway (west end), Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Brownsville, TX (20,4,5,8)
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Ground Weather Radar Station Brownsville, TX
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weather_mapweather_map weather_map

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.