Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
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802 FXUS64 KHGX 021100 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 600 AM CDT Sun Jun 2 2024 ...New AVIATION... .SHORT TERM... (Today through Monday Night) Issued at 228 AM CDT Sun Jun 2 2024 With surface high pressure nearby leading to light winds combining with the saturated grounds from the previous rounds of rainfall, we`ve begun to see some decreased visibilities with patchy fog developing. Some upper level clouds being blown downstream from decaying storms in west Texas may inhibit fog development a bit. Later this morning, a shortwave pushes through Southeast TX from the west and gets the convection south of I-10 generally around 10am or so. The sea breeze is expected to generate some additional showers/storms in the afternoon hours, so Sunday may be rather reminiscent of Saturday. SPC will be keeping in the marginal risk of severe weather (level 1 out of 5) for areas east of a Caldwell-Katy- Pearland line, and the main threat will be damaging winds in a few isolated storms that may become strong to severe. The other thing we`ll be watching for is locally heavy rainfall. PW values will still top out around 2.0" this afternoon, which is above the 90th percentile (~1.86"). If one of these stronger storms moves slowly over a particular location, we could see minor localized street flooding. This is why WPC has most of Southeast Texas in a marginal risk (level 1 out of 4) of excessive rainfall. Temperatures should still be able to reach the upper 80s/low 90s this afternoon, but those that do see rainfall (or are near any showers/storms) will get intermittent periods of rain-cooled air. This offers a brief reprieve from the heat, but if it happens early enough in the day then you`ll get some increased humidity. Temperatures only drop off into the upper 70s on Sunday night with low 80s right along the coast. Monday will be very similar temperature wise, but the rainfall forecast is a bit tricky. 00Z CAMs show a MCS drifting through portions of Texas on Monday...and that`s being stated ambiguously for a reason! The timing and placement of it is very much up in the air at the moment, so confidence is rather low. However, I can say that generally the highest rain chances will be north of I-10 this time around. Batiste && .LONG TERM... (Tuesday through next Saturday) Issued at 1155 PM CDT Sat Jun 1 2024 The main concern through the long term will be the return of the heat. A long fetch of southerly flow at the surface driven by a surface high pressure in the SE CONUS will help drive the temperatures and dew points up. High temperatures will be in the low to mid 90s Tuesday through next weekend with afternoon heat indices rising to near 100 to 107 degrees. Overnight lows will be in the mid to upper 70s for most inland locations with areas along the immediate coast not dropping below 80 degrees. Also because of the higher dew points along the coast, overnight heat indices may not drop below 90 degrees. Rain chances through the upcoming week will be fairly low. The chances are slightly higher Tuesday and Wednesday as we get some weak disturbances sliding overhead combined with daytime heating, but even then not looking like anything impressive as of right now. Those low rain chances drop even lower as we head towards the end of the week as a ridge of high pressure begins to build over Texas. Fowler && .AVIATION... (12Z TAF Issuance) Issued at 600 AM CDT Sun Jun 2 2024 A mixed bag of IFR and MVFR ceilings/visibilities as low-level clouds along with patchy fog encompass Southeast TX. Ceilings and visibilites will improve back to VFR by 17Z. An upper level disturbance along with sea breeze will begin to generate scattered showers and thunderstorms around this time as well. This convection will start out south of I-10 near the coast, then drift northward through the afternoon. Some of the stronger storms will be capable of producing decreased visibilities due to heavy rain along with strong wind gusts. Expect convection to dissipate by 01Z. Late tonight into early Monday morning, another round of IFR/MVFR ceilings are expected to build in from south to north. Winds will remain southerly/southeasterly throughout the TAF period. Batiste && .MARINE... Issued at 248 AM CDT Sun Jun 2 2024 Additional isolated showers and thunderstorms will be possible during the late morning through afternoon hours today. Gusty winds and heavy downpours will be possible near the stronger storms. Moderate onshore flow will continue through the next several days with winds around 15kt with occasionally higher gusts and seas building to 4 to 6ft. Small craft will need to exercise caution at times, and conditions will be borderline Small Craft Advisory Monday and Tuesday. The onshore flow will persist into the second half of the week, but is expected to decrease to around 5-10kt. Rain chances will also gradually diminish through the week. The persistent onshore flow may also lead to a high risk of strong rip currents. Fowler && .HYDROLOGY... Issued at 228 AM CDT Sun Jun 2 2024 There are currently four River Flood Warnings in effect: three along the Trinity River and one on the Navasota River. The Navasota River at Normangee is forecast to crest in major flood stage on Sunday afternoon. The Trinity River at Riverside and at Moss Bluff are expected to be in minor flood stage until further notice. Lastly, the Trinity River at Liberty is forecast to crest in minor flood stage some time on Sunday. Remember to heed any instructions from your local officials and to never travel through ANY flooded areas or roadways. TURN AROUND, DON`T DROWN. Please monitor updated forecasts via the NWS NWPS webpage (https://water.noaa.gov/) as the river flood threat persists. Batiste && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 90 77 92 77 / 30 10 20 10 Houston (IAH) 90 77 91 79 / 30 10 20 0 Galveston (GLS) 87 81 87 81 / 30 10 10 0 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ SHORT TERM...Batiste LONG TERM....Fowler AVIATION...Batiste MARINE...Fowler