Northwest Houston, TX, during the mid-morning.
Northwest Houston, TX, near Tomball, TX, during the late morning.
Tomball, TX, during the late morning.
The Woodlands, TX, or maybe Spring, TX, near the Woodlands, TX, during the early night.
Locations: Northwest Houston, TX, Tomball, TX, and maybe Spring, TX and The Woodlands, TX.
Thoughts: There was fog on my way to and from The Woodlands, TX, or Spring, TX, during the mid and late morning and night. I am still trying to catch up on my sleep. So no real weather report for today either.
Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3940 41 42 43 44 45 46 47 48 49 50
000 FXUS64 KHGX 180301 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 901 PM CST Sun Dec 17 2017 .UPDATE... A dense fog advisory has been issued for portions of the Brazos Valley and Piney Woods region from 10 PM tonight through 10 AM Monday. Visibilities in those areas have already fallen to 1/2 mile in some locations and will likely only worsen as the night goes on. This fog, along with grey and rainy conditions closer to the coast could really slow down the Monday morning commute across the area. The advisory may need to be expanded southward later tonight, but there is currently not as much confidence that those areas will see widespread dense fog. 11 && .PREV DISCUSSION... /ISSUED 544 PM CST Sun Dec 17 2017/ AVIATION [00Z TAF Issuance]... Satellite imagery shows quite a bit of high clouds in SW flow aloft. Below that is a mix of VFR to IFR ceilings with 6 mile visibility or better. Overall trends for the SE Texas terminals will be for ceilings and visibility to decrease over the next 6 hours to IFR conditions. There may be some pockets or brief times of LIFR conditions and even some dense fog. For now think 1-2 mile visibility looks reasonable for a persisting condition. Showers and light rain should develop after 06Z tonight with upglide over the frontal boundary off the coast. There may be some elevated instability for convection to tap but will hold off on any mention of thunderstorms given more stable boundary layer. There also may be a period of heavier rain in the afternoon but decided not to include in the TAF since there might not be much if any change in flight category. IFR conditions should persist through much of the day with visibility improving some. Quite possible this will be a prolonged period of IFR conditions. Overpeck PREV DISCUSSION /Issued 345 PM CST Sun Dec 17 2017/... Temperatures have been slow to warm this afternoon in parts of the Brazos Valley and Piney Woods owing to persistent cloud cover. Elsewhere, breaks in the clouds have allowed for temperatures to warm into the mid 50s to lower 60s. Limited heating today is also resulting in very small dewpoint depressions across the Brazos Valley this afternoon, which means that another round of fog will be possible this evening and tonight (with onset much earlier than last night). Low level ridging over the Gulf building west tonight will help increase isentropic lift on the 295 K surface, allowing for bands of showers to develop along the coast and across the coastal waters by late this evening. Should any of this activity be able to tap into some of the elevated instability present (around 1000 J/kg MUCAPE along the coast), a few embedded thunderstorms will be possible as well. How far south fog will be able to spread (and how dense it will get) will be dependent on the rain that develops along the coast and for now highlighting areas north of the Highway 59 corridor as having the best potential to see dense fog tonight. A developing warm front tonight over the Gulf may also result in periods of sea fog returning to the nearshore waters before it lifts inland Monday. Southwest flow aloft will persist Monday and Tuesday, allowing for periods of showers, isolated thunderstorms, and sea fog to persist. The upper trough encouraging this southwest flow lifts across Texas on Tuesday, becoming negatively tilted as it does. This will drag a cold front across the region as the upper trough passes late Tuesday into early Wednesday. A few strong to severe thunderstorms are possible ahead and along the front as returning moisture ahead of the front contributes to SBCAPE values approaching 1500 J/kg and 0-6 km bulk shear values increase into the 50-60 knot range in response the trough`s passage. Primary threats appear to be gusty winds, locally heavy rain, and possibly an isolated tornado before the system shifts east of the region Wednesday. Drier air behind the front will also result in a brief break in sea fog Wednesday, but onshore flow quickly returns Thursday and Friday and returning moisture may allow for sea fog to redevelop late in the week. Warm air advection will also result in showers again spreading north into the region from the Gulf during this time. The cold front expected to cross the region on Friday has come in dramatically weaker and drier than 24 hours ago and have trended with a blend of model guidance for the extended portion of the forecast due to the extreme variability being observed in model solutions. A second, stronger cold front may arrive closer towards Christmas... but any impacts from this front are indiscernible at this time. Huffman MARINE... Light easterly winds will veer becoming southeasterly winds overnight tonight. With higher dewpoints situated in the northern Gulf of Mexico associated with the remnant moisture from the coastal trough that moved through the region yesterday, warm moist air will be advected over the cooler shelf waters this evening. This will result in possible sea fog development over the coastal waters and bays, beginning this evening and continuing into Monday. This set up for potential sea fog should remain in place through the beginning of the week until late Tuesday when the next cold front is expected to move across SE TX. Additionally, the potential for isolated shower coverage will increase to scattered showers, as a warm front slides north across the northwestern Gulf of Mexico late tonight through Monday. These scattered showers will linger through the day Tuesday out ahead of our next cold front. Light to moderate winds will turn out of the northwest becoming north behind the front Tuesday evening and continue through the day Wednesday. Wave heights should remain between 2 to 4 feet through most of next week. Onshore flow returns early Thursday, and wind speeds should strengthen enough that a SCEC may be necessary in the offshore waters late Thursday through early Friday. Additionally, wave heights should increase to 3 to 5 feet late Thursday through Saturday. Model guidance has slowed the arrival of Friday`s cold front to late in the afternoon into the early evening hours. Based off the most recent model solutions, the winds should shift out of the northwest along the coast around 00Z Saturday. Moderate to strong northerly winds will fill in behind this frontal passage. At this time, wind speeds should strengthen enough that a SCA would be needed over both the coastal and offshore waters. Hathaway && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 49 64 60 71 54 / 10 60 60 90 40 Houston (IAH) 54 67 64 74 58 / 30 60 40 60 70 Galveston (GLS) 58 66 64 70 61 / 40 60 20 30 60 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...Dense Fog Advisory until 10 AM CST Monday for the following zones: Brazos...Burleson...Grimes...Houston...Madison... Montgomery...Polk...San Jacinto...Trinity...Walker... Washington. GM...NONE. && $$ Discussion...11
Hazardous Weather Outlook
Hazardous Weather Outlook National Weather Service Houston/Galveston TX 352 PM CST Sun Dec 17 2017 TXZ213-214-235>238-182200- Brazoria-Chambers-Galveston-Harris-Jackson-Matagorda- 352 PM CST Sun Dec 17 2017 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...This Afternoon and Tonight Patchy to areas of fog will be possible tonight. Some of this fog may be dense and fall below 1 mile at times. .DAYS TWO THROUGH SEVEN...Monday through Saturday Strong to severe thunderstorms will be possible on Tuesday as an upper level system crosses Texas. Gusty winds, locally heavy rain, and an isolated tornado will be possible. Periods of fog will be possible along the coast through Tuesday before a cold front clears the coast. Fog may return to coastal areas late in the week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time. $$
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