Area Forecast Discussion
Issued by NWS Houston/Galveston, TXVersions: 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 39 40 41 42 43 44 45 46 47 48 49 50
000 FXUS64 KHGX 282326 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 526 PM CST Thu Jan 28 2021 .AVIATION [00Z TAF Issuance]... Visible satellite shows more upper-level cloud cover coming in from the west that will bring BKN250 ceilings to all but the coastal sites (LBX and GLS) as we head into the nighttime hours. Also beginning tonight, winds will become light and variable through Friday morning as we lose any semblance of a pressure gradient over SE Texas. Winds will pick up out of the southeast on Friday morning as high pressure moving off to the east begins to put us into onshore flow. This southeasterly wind will also return moisture to the area with low-level clouds moving in on Friday morning. SCT025 has been added for the inland sites and BKN030 for the coastal sites to establish this trend. Looking ahead, MVFR conditions will likely return for most sites Friday evening/night. 26 && .PREV DISCUSSION /Issued 312 PM CST Thu Jan 28 2021/... .SHORT TERM [Today Through Saturday]... Currently our CWA is experiencing mostly clear skies with some upper- level cirrus pushing through. High temperatures will struggle to reach 60 for Houston and areas south while our northern counties will reach the mid-to upper 50s. Thicker cirrus clouds will begin to fill in tonight and early tomorrow morning ahead of the next cold front. Calm NE-E winds tonight will increase and switch to the SE by early tomorrow morning as a surface high pressure slides east of our region. Increased cloud cover and the return of SE flow will help keep overnight lows tonight a few degrees warmer than last night. By late tomorrow morning, winds will strengthen further and begin to switch to the south, advecting more moisture and warmer air over our region. PWATS will increase to near 1.0 inches. This onshore flow will help increase low-level cloud coverage tomorrow. Overnight lows tomorrow will increase to the mid-to-upper 50s across our CWA and near 60 along the coast due to WAA and more low-level clouds. By early Saturday morning, rain chances will begin to increase as the next cold front approaches our CWA. KBL .LONG TERM [Saturday through Friday]... Scattered showers on Saturday as a cold front moves into the area. While southerly flow brings in moisture, PWATs will only peak around 1.30 to 1.40 inches so not much in the forecast for accumulation. South of I-10 will mainly see trace amounts to 0.02 and north of I- 10 could see a little more. Highs on Saturday will reach the mid 70s after a lows just below 60. The front will push off to the east Sunday morning, but cooler air will still be filtering into the region with lows in the northern counties in the upper 40s and the southern counties in the mid 50s. Skies will clear as high pressure builds in through Sunday. Highs will reach the mid 60s and rain chances diminish. Northerly flow and mostly sunny skies last through mid next week when high pressure moves from SETX into the Ohio River Valley. Highs will reach the mid 60s and lows in the low 40s. Southerly flow returns Wednesday and temperatures increase and rain chances return Thursday and Friday as another cold front moves through the area. 35 .MARINE... Northeast winds around 15 to 20 kt will gradually diminish this evening as the surface high pressure shifts to the east. Gusts up to 20 knots will still be possible offshore through early this evening. A disturbance over western TX will bring a cold front through the region on Saturday. Moderate onshore winds are expected ahead and along of this FROPA with elevated seas from 5 to 8 ft. Small Craft Advisory conditions are expected from late Friday into Sunday, and could persist into Monday. Rain and storm chances are also expected along the front on Saturday. Light to moderate onshore flow returns late Monday and should persist through the end of the week. In terms of sea fog, there is a threat of dense fog prior to front Friday night into Saturday, and then again Saturday into Sunday, though confidence remains low to moderate at this time. 05 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 38 66 56 74 47 / 0 0 10 30 0 Houston (IAH) 40 65 56 73 52 / 0 0 10 40 10 Galveston (GLS) 51 64 60 69 56 / 0 0 10 20 20 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...SMALL CRAFT SHOULD EXERCISE CAUTION until 6 PM CST this evening 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. && $$
No comments:
Post a Comment