Sunrise 6:48 AM   Sunset 7:54 PM Moonrise 4:14 PM   Moonset 4:11 AM

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GMZ335 Galveston Bay- 242 Am Cdt Sat Apr 20 2024
Today - East winds around 10 knots, becoming southeast 10 to 15 knots this afternoon. Bay waters slightly choppy. Patchy fog early this morning. A chance of showers and Thunderstorms. Tonight - East winds 10 to 15 knots, becoming northeast after midnight. Bay waters slightly choppy. Showers and Thunderstorms likely. Sunday - North winds 15 to 20 knots. Bay waters choppy. A chance of showers and Thunderstorms. Sunday night - Northeast winds 15 to 20 knots, diminishing to around 15 knots late. Bay waters choppy, becoming slightly choppy late. Monday - Northeast winds 15 to 20 knots, becoming east around 15 knots in the afternoon. Bay waters choppy, becoming slightly choppy in the afternoon. Monday night - Southeast winds 5 to 10 knots. Bay waters smooth.Tuesday - Southeast winds 5 to 10 knots. Bay waters smooth. Tuesday night - Southeast winds 5 to 10 knots. Bay waters smooth. Wednesday - Southeast winds around 10 knots, increasing to 10 to 15 knots in the afternoon. Bay waters smooth, becoming slightly choppy in the afternoon. Wednesday 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 242 Am Cdt Sat Apr 20 2024
Synopsis for high island to the matagorda ship channel out 60 nm including galveston and matagorda bays
onshore winds will prevail through tomorrow night, resulting in some patchy fog development through tomorrow morning. A cold front will move offshore tomorrow night, resulting in a shift to moderate northeast winds. Showers and Thunderstorms will develop along and ahead of the front, impacting the bays and coastal waters between later tomorrow afternoon and Sunday morning. As the front departs, moderate to strong offshore winds will develop which will likely require a small craft advisory. Winds will relax by Monday, with onshore flow redeveloping on Tuesday.

FXUS64 KHGX 200926 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 426 AM CDT Sat Apr 20 2024

New SHORT TERM, LONG TERM, MARINE

SHORT TERM
(Today through Sunday Night)
Issued at 242 AM CDT Sat Apr 20 2024

A rather busy period is expected for SE TX today and tonight with the approach/passage of a strong short wave from the west. The warm/humid airmass already in place over the region will see an additional boost of moisture from the Gulf this afternoon (as PWs increase to 1.7"-2")
with the development of a strong LLJ. Further aloft, models are cont- inuing to indicate a broad diffluent jet structure along with a grad- ually increasing shear pattern at the mid levels.

Although the primary weather concerns are for this evening on through tonight with the arrival/passage of the associated cold front...there is still a chance of isolated to scattered activity this morning into this afternoon via embedded disturbances in the flow aloft. The high- est POPs should be north and west of the US-59/I-69 corridor. As day- time heating begins to peak, all the aforementioned factors will also be coming together as well. This does point to increasing coverage as well as the intensity of the developing showers/thunderstorms as this next cold front begins to make its E/SE push through the CWA Strong/ severe storms cannot be ruled out for this afternoon/evening. SPC has a large part of SE TX in a Marginal Risk (level 1 of 5) for severe wx starting later this afternoon. Strong winds and hail will be the main threats.

As this widespread convection moves through the area, periods of mod- erate to heavy rainfall will be possible. Models continue to indicate that the best locations for training activity/higher rain totals will be generally north of the I-10 corridor through tonight. WPC is main- taining a Slight Risk (level 2 of 4) risk for excessive rainfall over the northern half of the CWA ..and a Marginal Risk (level 1 of 4) for the rest of the area.

Rain chances will be ending (from west to east) by Sun morning as the storm system pushes east of the area and helps to drag its associated cold front front through. Cooler/drier air will be filtering into the CWA through the day as N/NE winds develop. Clouds could take a little more time to clear...but should clear out by tomorrow evening. 41

LONG TERM
(Monday through Friday)
Issued at 242 AM CDT Sat Apr 20 2024

Mild and generally pleasant conditions will continue on Monday, with morning temperatures sitting in the 40s/low 50s as surface high pressure is centered just to our north. Afternoon highs will rise into the lower 70s, but with dew points sitting in the 50 degree range during the afternoon conditions should prove to be much more pleasant than that of the preceding week. The aforementioned surface high will begin to drift to the east by Tuesday, leading to the reestablishment of an onshore flow regime and thus a gradual increase in both temperatures and humidity through the end of the week. Highs will reach the 80s once again by mid-week, while dew points will break the 60 mark by Wednesday and approach 70 by Thursday. As this pattern prevails, WAA and increasing low-level cloud cover will see low temperatures again reaching the upper 60s for many areas by Thursday.

As a midlevel trough swings into the Central Rockies on Thursday and the associated lee cyclone at the surface deepens to around 990mb, the resultant tight synoptic pressure gradient will produce gusty conditions across SE TX to close out the week. Inland wind speeds on Friday will reach around 20 mph with gusts in excess of 30 mph possible at times. A weak surface boundary associated with this feature will approach on Friday, but should stall to our north. This could still produce some shower/storm activity across the far northern zones, but as a whole rainfall chances will otherwise be contained to isolated diurnally driven activity through the end of the week.

Cady

AVIATION...
(06Z TAF Issuance)
Issued at 1147 PM CDT Fri Apr 19 2024

Mix of VFR/MVFR expected to become MVFR/IFR during the overnight hours. LBX already at IFR with CIGs . Expect -RA and VCTS around 19-22Z for northern terminals, moving SE during the day. Showers and thunderstorms expected to continue Saturday afternoon into the overnight hours with lingering showers Sunday morning. Some showers and storms could produce locally heavy rainfall and decreased VSBYs. Expect CIGs to remain at widespread MVFR/IFR levels overnight through the end of the period.

MARINE
Issued at 242 AM CDT Sat Apr 20 2024

Steady onshore flow continues through Saturday, remaining under caution thresholds. Patchy fog remains a possibility through this morning as a result. A cold front will move offshore early on Sunday, bringing with it the potential for showers and thunderstorms. Behind the departing boundary, moderate to strong north winds will develop. This will likely require a Small Craft Advisory. Winds will diminish on Monday as an area of high pressure moves over to the area, and onshore flow resumes on Tuesday as the high drifts eastward. Steady onshore flow is expected throughout remainder of the week.

Cady

PRELIMINARY POINT TEMPS/POPS
College Station (CLL) 77 53 65 47 / 90 90 20 0 Houston (IAH) 82 56 67 52 / 70 70 30 0 Galveston (GLS) 78 61 70 59 / 40 60 30 0

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

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Houston Ship Channel, Galveston Bay, Manchester, Texas, Tide feet

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Sat -- 03:36 AM CDT     0.32 feet Low Tide
Sat -- 05:08 AM CDT     Moonset
Sat -- 06:47 AM CDT     Sunrise
Sat -- 08:59 AM CDT     0.64 feet High Tide
Sat -- 03:58 PM CDT     0.19 feet Low Tide
Sat -- 05:10 PM CDT     Moonrise
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