Sunrise 6:32 AM   Sunset 8:16 PM Moonrise 4:49 PM   Moonset 3:36 AM

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GMZ330 Matagorda Bay- 226 Am Cdt Mon May 20 2024
Today - Southeast winds around 10 knots. Bay waters smooth to slightly choppy. Tonight through Wednesday - Southeast winds 10 to 15 knots. Bay waters slightly choppy. Wednesday night and Thursday - Southeast winds 15 to 20 knots. Bay waters choppy. Thursday night - Southeast winds around 15 knots. Bay waters slightly choppy to choppy. Friday - South winds 10 to 15 knots. Bay waters slightly choppy.Friday night - Southeast 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 226 Am Cdt Mon May 20 2024
Synopsis for high island to the matagorda ship channel out 60 nm including galveston and matagorda bays
light to mostly moderate onshore winds can be expected through much of this week. Small craft may need to exercise caution at times around midweek as the onshore flow increases and seas rise.

FXUS64 KCRP 200842 AFDCRP

Area Forecast Discussion National Weather Service Corpus Christi TX 342 AM CDT Mon May 20 2024

New SHORT TERM, LONG TERM, MARINE

SHORT TERM
(Today through Tuesday)
Issued at 249 AM CDT Mon May 20 2024

Key Messages:

- Elevated heat risk of 110F or greater expected Tuesday for south Texas.

The pattern hasn't changed much from yesterday with the 500 mb ridge axis beginning to rotate into the region, with a sfc ridge located in the central Appalachians, and stretches SW into South Texas. A sfc trough is to the west in central Mexico and to the north in the panhandle region. The pressure gradient between the sfc ridge and the low to the west, is tighter than yesterday, so there is a bit more southeast winds over the region. The wind has been part of the region that there is less fog overnight, however, the low clouds have moved across south Texas again. Further upstream, a 500 mb trough is beginning to work its way into Baja California, which is producing sfc lows in the southern Rockies.

Today, as the 500 mb trough moves over southern California and the Baja, the 500 mb ridge amplifies during the day, and the southerly flow continues over south Texas. Temperatures continue to warm a few more degrees over yesterday. The expectation is for highs to reach around 90 along the Coastal Bend, to the 100-105 range in the western Brush Country and the Rio Grande Plains. Humidity is the key to the heat index, with the dewpoints out west mixing out to the mid to upper 60s today, and while the dewpoints are in the 70s in the east, the temperatures are around 90, so the heat advisory level (110F) won't be reached.

Tonight, The 500 mb trough moves NE into the Central Plains, keeping the ridge in Texas a bit flat overnight, with the sfc low in Mexico, looking more like a heat low. So no expectations for precipitation.
The winds will be stronger overnight, so that fog continues to be limited over the region.

Tuesday, the day looks warmer as the 500 mb ridge remains over the region for another day. The sfc ridge continues over south Texas with the axis along the Gulf coast before it bends norther into the Mid-Atlantic States. All this to say that we get a few more degrees warmer. The Rio Grande Plains will be closer to 105F The 100F isotherm looks to bisect the forecast area, and the Victoria Crossroads and the Coastal Bend are 90-100. The moisture out west isn't expected to mix out as much with the dewpoints remaining in the 70s longer than the day before. The expectation is that the dewpoints will be 70 or greater from roughly east of I-35 (60-90%).
Dewpoints are expected to be greater than 75 along the Coastal Bend and up into Victoria. So, there is a decent swath of 110 or greater Heat index values from inland Kleberg and Nueces west to the Rio Grande, and north toward McMullen and LaSalle counties. The new national heat risk map has that same area in the major heat risk level (3 out of 4).

LONG TERM
(Tuesday night through next Sunday)
Issued at 249 AM CDT Mon May 20 2024

Key Messages:

- Major to extreme heat-related impacts through the weekend

No changes to the previous forecast package as an upper level ridge and persistent onshore flow continues to dominate the forecast. High temperatures will range from the low 90s along the coast to around 105 across the Brush Country. Heat index values will increase from the 110-114 range Wednesday and Thursday to the 115-120 range across the Southern Coastal Bend and the Brush Country Friday and through the weekend. This will result in a Major to Extreme heat related impacts. Heat Advisories are likely each day, with Excessive Heat Warnings possible by the end of the week. Please be very cautious if you are outside: drink plenty of water, bring pets inside, take breaks, and wear light, loose clothing.

Several shortwaves are expected to move through as a boundary stalls to the north of the area. Showers and thunderstorms are forecast to stay to the north of the area Wednesday and Thursday. Hazy conditions will continue through the week as the fires continue to burn well to our south.

AVIATION
(06Z TAFS)
Issued at 1011 PM CDT Sun May 19 2024

VFR conditions are expected to prevail for most of the this TAF cycle. Some brief periods of MVFR conditions can be expected tonight at ALI and VCT due to a low chance of patchy fog developing tonight. Any site that drops to MVFR should return to VFR by tomorrow morning. Winds will also pick up tomorrow and be gusty at times, especially late in the afternoon into the evening.

MARINE
Issued at 249 AM CDT Mon May 20 2024

Weak to moderate east to southeasterly flow is expected today through Tuesday.Moderate onshore flow will persist through the end of the week, with periods of strong onshore flow Wednesday and Thursday afternoons across the southern bays and nearshore waters.
Hazy conditions will linger at times through the week as fires continue to burn to our south.

PRELIMINARY POINT TEMPS/POPS
Corpus Christi 93 78 93 80 / 0 0 0 0 Victoria 93 76 92 76 / 0 0 0 0 Laredo 102 78 104 79 / 0 0 0 0 Alice 97 76 97 78 / 0 0 0 0 Rockport 89 78 89 79 / 0 0 0 0 Cotulla 101 78 103 79 / 0 0 0 0 Kingsville 95 78 95 78 / 0 0 0 0 Navy Corpus 90 81 90 80 / 0 0 0 0

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

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Port Lavaca
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Mon -- 12:59 AM CDT     0.21 feet Low Tide
Mon -- 04:35 AM CDT     Moonset
Mon -- 06:32 AM CDT     Sunrise
Mon -- 10:13 AM CDT     0.92 feet High Tide
Mon -- 05:49 PM CDT     Moonrise
Mon -- 08:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Port Lavaca, Matagorda Bay, Texas, Tide feet

Port O'Connor
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Mon -- 04:34 AM CDT     Moonset
Mon -- 06:32 AM CDT     Sunrise
Mon -- 08:06 AM CDT     0.74 feet High Tide
Mon -- 05:48 PM CDT     Moonrise
Mon -- 08:12 PM CDT     Sunset
Mon -- 11:05 PM CDT     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Port O'Connor, Matagorda Bay, Texas, Tide feet

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