Summary: White and grey, low stratus clouds looked to cover the whole sky, during the morning, afternoon, evening, and night. The wind speeds looked to be calm. It felt very cold, during the early and mid-morning. It felt cold, during the late morning and night. It felt very cool, during the afternoon and evening. I saw on and off light drizzle, during the early and mid-morning. I saw on and off light to moderate rain during the late morning and through until sometime during the afternoon. Light to moderate with maybe some moderately heavy showers and possibly a thunderstorm or two, were scattered across the Houston, TX area, during the morning, afternoon, and evening.
Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
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500 FXUS64 KHGX 152340 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 540 PM CST Tue Dec 15 2020 .AVIATION [00Z TAF Issuance]... Showers and/or drizzle will taper off this evening as the main surface low moves northeast into Louisiana. Widespread cloud cover will persist with IFR to occasional LIFR conditions through late night. A weak cold front will move through the region late this evening, bringing gusts 15-20 knots at all terminals. Conditions will gradually improve by daybreak from southwest to northeast. KCLL and KLBX terminals should begin to see some clearing by early Wednesday morning. VFR conditions are expected by Wednesday afternoon. 05 && .PREV DISCUSSION /Issued 240 PM CST Tue Dec 15 2020/... .SHORT TERM [Through Thursday]... Weak surface low off the Matagorda coast will trek along the coast and east of the area this evening...taking the bulk of -ra and drizzle with it. Another sfc low, and attendant cold front, currently in n/w parts of the state will pass thru the area later tonight. Shouldn`t be much remaining moisture to work with so anticipate a mainly dry fropa along with a bump in nw winds as it pushes across. Clouds linger across the e/ne half of the CWA into early Wed afternoon and some locations will struggle to make it much past the 50 degree mark. Clearing skies as surface high pressure builds into the area late Wed into Thurs. Favorable conditions for a light freeze across inland parts of the area Wed night as the high positions itself almost directly overhead. (Metro areas inside the Beltway and most of the coastal counties will most likely remain above 32F). 47 .LONG TERM [Thursday Night Through Tuesday]... Onshore flow resumes and increases as the high moves off to the east which will set the stage for a warming and moistening trend into Sat. The next upper trof should be making its way eastward into the Plains and Midwest Fri-Sat. Associated surface frontal boundary should push through the CWA during the day Sat. There should be sufficient moisture in place for fairly good chances of shra & iso tsra, but not much of a concern in regards to overall significance/strength. Quiet, dry wx in the wake of this front into early next week with low-upper level ridging in control. 47 .MARINE... A complex forecast for today as a coastal low develops in the near shore waters as an upper level low approaches from the northwest. This has led to widespread light rain and drizzle across the Gulf waters and in Galveston Bay this afternoon. The area has had a persistent low stratus deck of around 500ft and patchy fog since this morning which will continue through the evening. A cold front associated with the upper level low will move through the waters tonight bringing a slow rise in the clouds through tomorrow morning. The cold front passage will also usher in moderate to strong northwesterly winds beginning tonight across the waters. A small Craft Advisory is in effect for the Gulf waters beginning at midnight tonight through noon tomorrow as sustained northwest winds of 20 to 25kts with gusts up to 30kts develop. Wave heights in the Gulf waters will rise to 4 to 6 feet overnight, then slowly fall through the day tomorrow. Small craft should exercise caution in the Bays tonight as well, but the winds should remain below advisory criteria. The persistent strong northwest winds overnight tonight into tomorrow morning combined with abnormally low astronomical tides will result in the potential need of Low Water Advisories in the Bays beginning late Wednesday morning through Wednesday afternoon. Tides will be around -1 to -2 feet below Mean Low Low Water. High pressure moves over the area late Wednesday bringing light north to northeasterly winds on Thursday. Onshore flow develops on Friday ahead of our next approaching disturbance which will move through the area early Saturday. Moderate to strong northwesterly winds will likely also follow this cold front`s pass as well. Fowler && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 37 51 31 59 38 / 10 0 0 0 0 Houston (IAH) 42 52 33 58 39 / 0 0 0 0 0 Galveston (GLS) 46 53 43 56 50 / 0 0 0 0 0 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...High Rip Current Risk until 6 PM CST this evening for the following zones: Brazoria Islands...Galveston Island and Bolivar Peninsula...Matagorda Islands. GM...SMALL CRAFT SHOULD EXERCISE CAUTION from midnight CST tonight through Wednesday morning for the following zones: Galveston Bay...Matagorda Bay. Small Craft Advisory from midnight tonight to noon CST Wednesday for the following zones: Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM...Coastal waters from High Island to Freeport TX out 20 NM...Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM...Waters from High Island to Freeport TX from 20 to 60 NM. && $$
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