Monday, September20, 2021
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Marine Weather and Tides
Port Lavaca, 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 7:14AMSunset 7:28PM Monday September 20, 2021 2:36 PM CDT (19:36 UTC) Moonrise 6:39PMMoonset 5:48AM Illumination 99% Phase: Full Moon; Moon at 14 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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GMZ330 Matagorda Bay- 1004 Am Cdt Mon Sep 20 2021
Today..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday..South winds 5 to 10 knots. Bay waters smooth.
Tuesday night..South winds 5 to 10 knots becoming north 15 to 25 knots. Bay waters smooth becoming choppy. A chance of showers and isolated Thunderstorms.
Wednesday..Northeast winds 20 to 25 knots. Bay waters choppy to rough.
Wednesday night..Northeast winds 15 knots. Bay waters slightly choppy to choppy.
Thursday..Northeast winds 10 to 15 knots. Bay waters slightly choppy.
Thursday night..East winds 5 to 10 knots. Bay waters smooth.
Friday..Northeast winds around 10 knots. Bay waters smooth to slightly choppy.
Friday night..East winds 5 to 10 knots. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1004 Am Cdt Mon Sep 20 2021
Synopsis for high island to matagorda ship channel out 60 nm.. Light southerly winds will continue into Tuesday ahead of an approaching cold front. The front should push off the coast between 8pm and 11pm Tuesday evening accompanied by a thin band of showers and Thunderstorms. Moderate to strong north and northeast winds and building seas can be expected to develop in the wake of the front and persist through Thursday morning. Winds and seas then gradually diminish late in the week and on into the weekend.


7 Day Forecast for Marine Location Near Port Lavaca, TX
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location: 28.64, -96.6     debug


Area Discussion for - Corpus Christi, TX
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FXUS64 KCRP 201146 AFDCRP

Area Forecast Discussion National Weather Service Corpus Christi TX 646 AM CDT Mon Sep 20 2021

AVIATION.

Patchy MVFR visibilities over portions of the interior Coastal Plains early this morning. Otherwise, VFR conditions expected today along with onshore flow increasing to moderate this afternoon/evening. Wind becoming light/variable 06-12z Tuesday, along with brief MVFR visibilities over the interior Coastal Plains.

PREV DISCUSSION. /Issued 338 AM CDT Mon Sep 20 2021/

SHORT TERM (Today through Tuesday) .

An upper level disturbance is expected to move across the Plains during the period, with the corresponding cold front expected to approach the CWA Tuesday afternoon (deterministic GFS/NAM/ECMWF). No precipitation expected today/tonight over the CWA given below normal PWAT values/lack of forcing. However, expect increasing moisture/moisture convergence over the CWA Tuesday afternoon as the front approaches. Expect the combination of frontal forcing, CAPE (NAM deterministic), and moisture, to result in isolated/ scattered convection Tuesday afternoon, especially over the northern sections. Maximum Heat Index values 105-109F expected today and Tuesday over much of the CWA.

LONG TERM (Tuesday Night through Sunday) .

An upper level trough deepening over the Great Lakes region while traversing eastward is expected to send an associated surface cold front into South Texas Tuesday evening into Tuesday night. The combination of moisture pooling ahead of the boundary along with enhanced convergence along of it may lead to scattered to numerous showers and thunderstorms through the overnight period on Tuesday. Some locally heavy rainfall will remain possible as PWATs are progged to near 2.0-2.2 inches, but no major flooding issues are anticipated at this time as this line should move through the area fairly quickly. Models continue to indicate moderate instability accompanying this boundary, and a strong thunderstorm cannot be ruled out as SBCAPE values will near 2-3k J/kg with very little to no inhibition available. SPC has maintained our region under a general thunderstorm area Tuesday night into Wednesday, and currently no widespread severe weather is anticipated.

As the frontal boundary sweeps through, expecting moderate to breezy northerly winds to develop in its wake resulting in Small Craft Advisory conditions across the bays and coastal waters Wednesday into Wednesday night. Generally breezy conditions can be expected inland.

A much drier airmass will then take hold from north to south in the aftermath of the front on Wednesday as high pressure builds at the surface and aloft. PWATs are progged to drop to less than a 0.5 inch, and dewpoints could drop into the 40s to 50s by Wednesday afternoon, which should make the temperatures feel much more comfortable. Highs are forecast to be in the mid 80s to lower 90s on Wednesday (about a 10 degree difference from Tuesday), with lows on Wednesday night possibly falling into the 50s and 60s!

Clear skies and light winds will allow for several cooler nights thereafter, but generally a gradual warming trend will commence over the weekend. Humidity should remain at bay through at least Saturday into Saturday night, but onshore flow is expected to resume on Sunday as the surface high shifts eastward allowing for a gradual increase in moisture. However, no rain chances are in the forecast through early next week as the overall moisture column stays relatively dry for this time of year.

MARINE .

Weak to moderate onshore flow today in response to surface low pressure over the Southern Plains. No significant precipitation expected today. The approach of a frontal boundary from the north/northwest will increase the chance for isolated/scattered convection Tuesday afternoon. The frontal boundary will push across the coastal waters late Tuesday night into early Wednesday morning with a moderate to strong northerly flow developing in its wake. This will likely result in Small Craft Advisory conditions on Wednesday, which may possibly linger through the early evening hours offshore. Numerous showers and thunderstorms are possible Tuesday night through Wednesday morning as the cold front pushes south through the area. Rain chances are expected to end from north to south through Wednesday. Winds will begin to decrease Wednesday night, becoming weak by the end of the week. Weak northeasterly to easterly flow is expected to persist through Saturday night, before gradually becoming southeast on Sunday.

PRELIMINARY POINT TEMPS/POPS. Corpus Christi 95 77 94 71 86 / 0 0 20 70 10 Victoria 97 75 94 68 86 / 0 0 30 50 0 Laredo 103 77 102 72 88 / 0 0 10 70 10 Alice 99 74 97 69 87 / 0 0 20 70 10 Rockport 92 80 92 72 86 / 0 0 20 70 10 Cotulla 104 76 100 69 91 / 0 0 30 50 0 Kingsville 97 74 96 70 86 / 0 0 20 70 20 Navy Corpus 90 81 91 74 85 / 0 0 20 70 10

CRP WATCHES/WARNINGS/ADVISORIES. TX . None. GM . None.



WC/87 . AVIATION


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 0 mi48 min S 14 G 16 87°F 86°F1012.1 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi48 min ESE 8.9 G 11 85°F 90°F1012.3 hPa
SDRT2 - 8773037 - Seadrift, TX 17 mi48 min SSE 11 G 12 86°F 87°F1012.4 hPa
MBET2 21 mi48 min SW 7 G 8.9 86°F 1011.4 hPa
AWRT2 30 mi48 min S 11 G 13 87°F 85°F1011.5 hPa
EMAT2 37 mi48 min SSE 8 G 9.9 86°F 86°F1012.2 hPa
RCPT2 - 8774770 - Rockport, TX 49 mi48 min SSE 14 G 16 86°F 88°F1012.9 hPa

Wind History for Seadrift, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX4 mi41 minSSW 8 G 1610.00 miFair93°F72°F50%1012.2 hPa
Palacios Municipal Airport, TX19 mi43 minSSW 710.00 miFair89°F77°F68%1012.2 hPa
Victoria, Victoria Regional Airport, TX23 mi45 minS 11 G 1810.00 miPartly Cloudy96°F71°F44%1011.5 hPa

Link to 5 minute data for KPKV

Wind History from PKV (wind in knots)
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S6S6S5S5S5S6S5S5S3S3CalmCalmCalmSW3S8S5S10S9S11
1 day agoNE6E12S8S4SW3CalmCalmCalmS3CalmCalmW3NW3CalmCalmCalmCalmCalmN3CalmCalmW4SE4Calm
2 days agoCalmE7SE7S9SE6SE5SE4SE3CalmCalmCalmCalmCalmCalmCalmCalmN4N3N4NW5NE5N5N4W5

Tide / Current Tables for Port Lavaca, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Mon -- 03:07 AM CDT     0.45 feet Low Tide
Mon -- 06:47 AM CDT     Moonset
Mon -- 07:13 AM CDT     Sunrise
Mon -- 11:24 AM CDT     1.06 feet High Tide
Mon -- 02:56 PM CDT     1.01 feet Low Tide
Mon -- 06:54 PM CDT     Full Moon
Mon -- 07:24 PM CDT     Sunset
Mon -- 07:39 PM CDT     Moonrise
Mon -- 08:06 PM CDT     1.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.50.50.50.50.60.80.9111.11.111111.11.11.11.11.11.11

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Mon -- 12:32 AM CDT     0.37 feet Low Tide
Mon -- 06:46 AM CDT     Moonset
Mon -- 07:13 AM CDT     Sunrise
Mon -- 09:00 AM CDT     0.93 feet High Tide
Mon -- 11:47 AM CDT     0.91 feet Low Tide
Mon -- 05:18 PM CDT     1.05 feet High Tide
Mon -- 06:54 PM CDT     Full Moon
Mon -- 07:23 PM CDT     Sunset
Mon -- 07:38 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.40.50.60.70.80.90.90.90.90.90.90.91111110.90.80.70.6

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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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