Area Forecast Discussion
Issued by NWS Corpus Christi, TX
Issued by NWS Corpus Christi, TX
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484 FXUS64 KCRP 111131 AFDCRP Area Forecast Discussion National Weather Service Corpus Christi TX 631 AM CDT Sat May 11 2024 ...New AVIATION... .SHORT TERM... (Today through Sunday) Issued at 250 AM CDT Sat May 11 2024 Key Messages: Low to medium chance for showers and storms today and tomorrow Coastal Flood Advisory in effect through this afternoon MSAS analysis this morning depicts a weak frontal boundary draped just south of the region. This boundary will slowly drift a bit further south this morning before slowly lifting north through the day. Water vapor imagery reveals an upper low churning across the Desert Southwest as well as a few ripples in the southwesterly flow currently in place aloft. As the front retreats back to the north, moisture will increase across the region. PWATs will range from 1.8-2.1" by this afternoon. This surge of moisture will lead to a 20-30% chance of showers and thunderstorms through this evening, generally east of Highway 281. Showers and thunderstorms are expected to develop over the mountainous terrain of Mexico as another shortwave ejects across the region. Several of the recent CAMs carry some of these storms across the Rio Grande and into the Brush Country around midnight. Forecast soundings reveal CAPEs around 1500-2000 J/kg and shear around 50 knots. DCAPE values over 1000 J/kg favor a wind threat in additional to hail. Any convection that materializes will gradually fizzle out as it moves across the Coastal Plains. SPC currently has our northwestern counties in a Marginal Risk for Severe Thunderstorms today. Chances for showers and thunderstorms increase into the 20-50% range on Sunday as the upper low begins to lift across the Southern Plains. Ample moisture remains in place along with rather high CAPE values. However, a respectable CAP appears to be in place which will act against our convective potential. Went ahead and issued a Coastal Flood Advisory for this morning`s high tide cycle. Tide levels are currently running about a foot above normal which puts us around advisory criteria by this morning`s high tide. PETSS guidance hints at us nearing 1.8-2` MSL as a persistent easterly wind continues along with 7s periods at buoy 19. && .LONG TERM... (Sunday night through next Friday) Issued at 250 AM CDT Sat May 11 2024 Key Messages: Low to moderate chance for showers and storms through Monday, dry Tuesday, low chance returns Wednesday and Thursday We start out the long term with southwesterly flow aloft as the region is sandwiched between a mid-level low over the Great Plains and a mid-level high over the southern Gulf. As these features progress eastward, several disturbances kick out from the low across the region early in the week but it looks like most of the PVA will be north of our CWA. Another low forms around mid-week, moves across the Desert Southwest with some additional PVA ejecting out across much of TX but mostly north of our area. This disturbance will also send a cold front our way sometime towards the end of the week. Despite the weak forcing, GEFS ensemble mean PWAT`s are progged to be around 1.90" well above our norm of 1.35" for this time of year except for Tuesday as PWAT`s drop to close to normal as the upper levels dry out. Showers and thunderstorm chances Sunday night will be low around 15- 20% increasing to a low to moderate (20-45%) chance Monday, with silent PoP`s Tuesday, a low (20-35%) chance Wednesday/Thursday and silent PoP`s the remainder of the week. Afternoon highs through the week will range in the upper 80s to 90s except for the barrier islands where mid 80s are expected. Overnight lows during this time will range in the upper 60s to 70s. && .AVIATION... (12Z TAFS) Issued at 625 AM CDT Sat May 11 2024 A mixture of VFR and MVFR ceilings are currently in place across the region. CRP is likely to stay MVFR through this TAF cycle. ALI/VCT will fall to MVFR through the morning while COT/LRD maintain generally VFR conditions through this evening. Isolated showers will be possible at the eastern 3 sites through this morning with some thunder mixing in this afternoon. Additional showers and storms are possible across the Brush Country after 00Z. It`s tough to get a good read on just where these storms will go so have opted for VCTS at COT/LRD. Brief IFR conditions possible late tonight. && .MARINE... Issued at 250 AM CDT Sat May 11 2024 A moderate to occasionally strong easterly flow will continue through the day. Winds will regain a southeasterly component as we head into Sunday. Brief periods of Small Craft Exercise Caution conditions are likely over our northern waters this afternoon. Increased moisture and an upper level disturbance will lead to a 20-40% chance of showers and thunderstorms through the weekend. Hazy conditions are also expected to continue for the next few days. Weak to moderate onshore flow will persist through Monday then becomes weak through Tuesday. Onshore flow may become northeasterly at times increasing to weak to moderate late Tuesday through the end of the period. Showers and thunderstorm chances Sunday night will be low around 15-20% increasing to a low to moderate (20-45%) chance Monday, and a low (20-35%) chance Wednesday/Thursday. && .PRELIMINARY POINT TEMPS/POPS... Corpus Christi 85 76 89 77 / 40 20 20 10 Victoria 85 72 86 76 / 20 40 60 20 Laredo 91 75 98 76 / 30 40 10 20 Alice 87 74 92 76 / 40 30 30 10 Rockport 84 76 86 78 / 40 30 30 10 Cotulla 89 75 94 77 / 20 40 10 20 Kingsville 86 75 92 76 / 40 10 20 10 Navy Corpus 86 78 89 79 / 40 20 30 10 && .CRP WATCHES/WARNINGS/ADVISORIES... TX...Coastal Flood Advisory until 3 PM CDT this afternoon for TXZ345- 442-443-447. GM...None. && $$ SHORT TERM...TC LONG TERM....BF AVIATION...TC/95