Sunrise 6:37 AM   Sunset 7:57 PM Moonrise 12:43 AM   Moonset 10:59 AM

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GMZ335 Galveston Bay- 441 Am Cdt Tue Apr 30 2024
Today - Southeast winds 5 to 10 knots. Bay waters smooth. Patchy fog this morning. A slight chance of showers and Thunderstorms early this afternoon. Tonight - Southeast winds around 10 knots. Bay waters smooth to slightly choppy. Patchy fog late. Wednesday - Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog early in the morning. A chance of showers and Thunderstorms in the afternoon. Wednesday night - Southeast winds 15 to 20 knots, diminishing to around 15 knots late in the evening, then increasing to 15 to 20 knots after midnight. Bay waters choppy, becoming slightly choppy late in the evening, then becoming choppy after midnight. A chance of showers and Thunderstorms early in the evening. Thursday - Southeast winds 15 to 20 knots, diminishing to around 15 knots in the afternoon. Bay waters choppy, becoming slightly choppy in the afternoon. Thursday night - Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms after midnight. Friday - Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms in the morning. Friday night - Southeast winds 10 to 15 knots. Bay waters slightly choppy. Saturday - Southeast winds 10 to 15 knots. Bay waters slightly choppy. Saturday night - Southeast winds 10 to 15 knots. Bay waters slightly choppy.
winds and waves higher in and near Thunderstorms.

GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 441 Am Cdt Tue Apr 30 2024
Synopsis for high island to the matagorda ship channel out 60 nm including galveston and matagorda bays
lowering winds and decreasing seas can be expected though today. Generally moderate onshore flow and somewhat elevated seas are anticipated this week and into the start of the weekend. Caution flags might occasionally be needed during periods of higher winds, especially Wednesday night into Thursday. Periods of unsettled weather are possible, though better shower and Thunderstorm chances should be situated a bit further inland for much of the forecast period as the next cold stays away from the coast.

FXUS64 KHGX 301131 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 631 AM CDT Tue Apr 30 2024

New AVIATION

SHORT TERM
(Today through Wednesday Night)
Issued at 301 AM CDT Tue Apr 30 2024

Light winds, plenty of near-surface moisture, and mostly clear skies are allowing for areas of fog and stratus early this morning. Latest nighttime microphysics satellite imagery show a widespread deck of stratus surging northward across the Coastal Bend/Matagorda area.
Further north, fog continues to develop, especially across our far northern counties. With dewpoint depression values near 1-2 degrees; expect fog developing and expanding in the next few hours. Fog and stratus should gradually burn/lift through mid/late morning as daytime boundary layer mixing occurs.

No significant weather impacts are expected today. Surface high pressure centered to our east will continue to surge warm and humid southerly flow across SE TX. Slightly warmer temperatures that yesterday can be expected today with highs mainly into the mid to upper 80s. Return surface flow and zonal flow aloft will bring different impulses of energy that combines with diurnal heating will be enough to produce isolated to scattered rain and storms. The best chances will be south of I-10.

Stratus will make another surge north bringing back cloudy conditions. There is also a potential for fog; however with winds slightly stronger the coverage should be patchy.

Rain and storm chances continue on Wednesday thanks to daytime heating, increasing PWs and weak mid-level shortwaves. A stronger shortwave trough will move over the Plains by Wednesday, reaching our western counties by late Wednesday night. This system will bring the best potential for showers and storms during the short-term period.

JM

LONG TERM
(Thursday through Monday)
Issued at 301 AM CDT Tue Apr 30 2024

A series of mid to upper level disturbances along with mid level vort maxes will continue to pass through Southeast TX during the second half of the work week. Southeasterly flow will prevail through much of the long term period and will continue to transport pulses of low level moisture into the region. PWs can be as high as 1.8 inches at times. With sufficient moisture and instability in place, along with the mid to upper level disturbances passing overhead, showers and thunderstorms are expected to develop through the end of the work week. For the weekend, NBM solution has less chances of rain with showers and storms to be more isolated in nature.

By the start of the upcoming week, the global models indicate drier conditions as mid level ridging builds over the region. A consequence to this, would be warmer temperatures. We will have temperatures warm a degree or two each day but staying in the 80s.
However, by early next week, we could begin to see the highs reaching the upper 80s to low 90s and with dewpoints in the upper 60s to low 70s, it will feel fairly humid, in particular during the morning hours.

24

AVIATION
(12Z TAF Issuance)
Issued at 625 AM CDT Tue Apr 30 2024

Widespread LIFR and IFR conditions due to reduced visibility and low clouds will continue through 13-15Z. Fog and clouds should gradually dissipate/lift by mid-morning, with VFR conditions expected for the rest of the day. Today's winds should remain from the SSE winds around 7 to 10 knots. Another period of MVFR to LIFR conditions due to fog and stratus is again expected tonight.

JM

MARINE
Issued at 301 AM CDT Tue Apr 30 2024

Seas will continue to subside today, however, small craft should continue to exercise caution as seas diminish throughout the day.
Generally moderate onshore winds are expected to develop Wednesday night and continue through much of the forecast period. This will result in seas of 4 to 6 feet over the offshore waters and 2 to 5 feet over the nearshore waters. Also, strong rip currents could occur across the Gulf facing beaches over the next few days.
Periods of showers and storms can be expected through Friday.

24

HYDROLOGY

Below are the rivers that continue to be above flood stage:

- Trinity River (Goodrich): Major Flood Stage - Trinity River (Liberty): Moderate Flood Stage, rising to Major Flood Stage - Trinity River (Riverside): Moderate Flood Stage - Trinity River (Romayor): Action Flood Stage, rising to Minor Flood Stage - Trinity River (Moss Bluff): Minor Flood Stage - Menard Creek (Rye): Moderate Flood Stage, rising to Major Flood Stage - Bedias Creek (Madisonville): Minor Flood Stage - San Jacinto (New Caney): Action Flood Stage, rising to Moderate Flood Stage - San Jacinto (Cleveland): Action Flood Stage, rising to Minor Flood Stage

24

Previous Discussion Issued at 335 PM CDT Mon Apr 29 2024:

5-10 inches with isolated totals of 10-12+ inches of rainfall have fallen over the past 24 hours causing minor to major river flooding along the Trinity River and its tributaries. Lake Livingston is showing inflows of near 160,000 cfs and is currently releasing 98,400 cfs. Expected impacts include extensive inundation of agricultural land, widespread street flooding, and structure flooding along the lowest areas of the Trinity River. Many impacts are already occurring upstream of Lake Livingston and along tributaries. Additional impacts are expected to worsen over the next 6-12 hours downstream of the lake and will persist for several days.

Additional minor to moderate river flooding is expected along the E.F.
San Jacinto and Navasota Rivers. Primary impacts include street flooding and isolated structure flooding. Rises to action stage are expected across the majority of the San Jacinto and Brazos River basins. Most impacts will occur within the next 24-48 hours, with some impacts lingering into the end of the week. 

Please monitor updated forecasts via the NWS AHPS website and/or the new NWS NWPS webpage (https://water.noaa.gov/) as the river flood threat continues. 

PRELIMINARY POINT TEMPS/POPS
College Station (CLL) 86 69 84 71 / 10 10 40 40 Houston (IAH) 86 71 84 73 / 10 10 40 30 Galveston (GLS) 80 72 80 74 / 20 10 30 10

HGX WATCHES/WARNINGS/ADVISORIES
TX...Dense Fog Advisory until 10 AM CDT this morning for TXZ163-164- 178-179-200-214-300.

GM...Small Craft Should Exercise Caution until 10 AM CDT this morning for GMZ370-375.

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Clear Lake
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Tue -- 01:43 AM CDT     Moonrise
Tue -- 06:38 AM CDT     Sunrise
Tue -- 09:30 AM CDT     -0.22 feet Low Tide
Tue -- 11:59 AM CDT     Moonset
Tue -- 07:56 PM CDT     Sunset
Tue -- 08:12 PM CDT     0.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Clear Lake, Harris Co. Park, Texas, Tide feet

Bolivar Roads
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Tue -- 01:41 AM CDT     Moonrise
Tue -- 01:59 AM CDT     -2.09 knots Max Ebb
Tue -- 06:37 AM CDT     Sunrise
Tue -- 07:19 AM CDT     0.00 knots Slack
Tue -- 11:30 AM CDT     1.91 knots Max Flood
Tue -- 11:58 AM CDT     Moonset
Tue -- 06:59 PM CDT     -0.00 knots Slack
Tue -- 07:55 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Bolivar Roads, Texas Current, knots

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