Stx_Thunder

Looks a bit interesting tonight near/just west of DFW area, and possibly Coastal/SETX Monday afternoon with the front from that next incoming deep but compact ML Low out west. Tracking even further south over northern Mex on wv right now. CAPE and ML lapse rates (again) are going to be the negating factors. And Fall, actually coming in this week with a reinforcing polar surge dropping all the way through the state mid-week. 40s F everywhere (including STX) Thursday morning on both GFS & Euro. Euro showing DPs in the 10s over CTX Wednesday afternoon (fairly impressive for the time of year).

No outbreak by any means yesterday, but was not a bust in the state either. - And I have to give GEFS and EPS systems actual credit for the preliminary projection & track of yesterday's deep ML Low into NM and panhandle, from Oct 20th - 25th. They were basically trash for when summer started this year, but this is a pretty good make up. Especially coming out of a unusually quiet October.

Getting more robust and sustained cluster development just northwest of San Antonio with a new severe warning there and new development ongoing now further southwest. All activity in the region is still progressing south fairly slow also since cells initiated about 3 hours ago now.

Clearly seeing the robust ML Low spinning even on radar over NM (south of Albuquerque) and still edging south over the past several hours. Also seeing a few lightning strikes starting to show up now in the light precip shield around the center near Albuquerque. Del Rio 12z UA obs earlier this morning already has around 60 knots effective shear and WBZ height now under 10 kft. Fairly stout and typical, but definitely not un-breakable 850mb inversion. Especially with all the dynamics and front coming in later today or this evening. Definitely going to be interesting tonight even over the southern half and San Antonio area in the more robust thunder initiation zone.

Still looks, and getting even more and more convectively interesting now (severe potential also) with each new Euro and GFS run, tomorrow night - Tuesday morning for pretty much all the eastern half. Even San Antonio area, and into deep STX. 'Not surprised at all SPC hasn't even pushed the marginal risk area on D2 outlook update earlier today over STX (typical of them). Incoming ML trough/H5 Low out west keeps trending further south in the state, speeding up the arrival of 40+ kt DL shear now and better dynamics toward the lower coast also (more in line now with the incoming frontal convective activity Monday night). CIN is already fairly weak on this evening 0Z soundings (noticing that down here today with bigger cumulus formation and storms last Friday morning that I didn't expect), and projected to rapidly erode tomorrow evening (if any by then). Bulk shear already around 50 knots and 40 at H5 on 0Z Del Rio sounding this evening. Moisture will likely be enough. Only thing possibly sig lacking is good enough ML lapse rates that are projected to lower as Monday night progresses.. Later this week into next week could also get interesting with trends.

Both GFS and Euro starting to show a potentially robust cutoff H5 Low out west over Baja/W Mex around Nov 5. If that's the case, then we could have a more prolonged wet period over the state to start November (and possible severe). Ensembles have been outputting some fairly signficant rain amounts in early November for about a week now. Latest ECMWF run going up to 4 in. over the northern half. Given that LN still hasn't developed even officially into a weak state (like CPC insisted earlier this year, by August/September), the odds are decent for at least some actual rainfall over much of the state. And dynamical ENSO models now aren't showing much of any LN developing this winter. Which would be better overall for TX.

Some decent convective cluster action starting to get going on the mid-coast now ahead of that front that’s to bring some fairly comfortable conditions across the state the next few days (definitely fall-like all things considered just coming out of summer & still September). Nothing powerful though so far on lightning strike analysis. The drier frontal airmass could get sustenance for several days with the northerly flow on the outer western circulation of hurricane Helene as it goes inland and north into the mid-south. - - - - - WBZ height is pretty low for the time of year on BRO and CRP soundings today. Right near 10,000’ now on special 18Z obs on CRP with a bit of a dry slot 700mb - 500mb layer which may enhance the severe wind gust and hail potential a little bit in the strongest cells earlier this evening over STX. SPC surprisingly has marginal risk area even down the lower coast on current D1 outlook through early tomorrow (despite the still quite meager shear values).

https://www.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=0968&yr=2024 WPC now has a quite broad D1 ERO Slight risk area. The San Angelo area has close to 10 in. rainfall now just in the last 24 hours. - - - Had thunder going on during every hour around me for 12 hours or so yesterday which hasn’t happened in a good while with a tropical ML Low near the coast now. Heaviest rainfall the next few days looks to be around the mid-coast (especially PWs having already been around 2.5”), until a legit “Taste of Fall” front looks to actually move all the way through most if not entire state this weekend (way ahead of season at least over the southern half in early September). ETX surprisingly is looking to stay pretty dry this week despite front/troughing in state. Euro showing DPs dropping quite low into the 40s for a lot of the state (for this time of year), early next week. Which would yield some pretty effective nocturnal radiational cooling if so. Showing 50s air temp lows and even lower 80s for highs on the map Monday - Tuesday over a good part of the hill country region near San Antonio / Austin area too. Which both are definitely below normal in early-mid September.

Can clearly see the non-trop mid-upper level Low that curved down the EC into the northern Gulf, NWS Brownsville was discussing now in this morning’s AFD. Circulation easily notable on WV with a decent amount of lightning ongoing right around it as of typing this. That Low explains why multi-model thunder output the past 2 days was showing enhanced prob areas Monday morning (tomorrow) when it comes onshore. - - - - - Euro & GFS, and ensembles starting to step up on rainfall amounts through next weekend as moisture looks to stick around & ridging influence looking more likely now to stay away for the most part (which typically starts to happen in late August). Showing some 3 - 4” areas now around the upper coast around SETX and going higher into first week of September. @Ed, snow and hurricane fan

Decent convective action going on this afternoon despite broad influence of the furnace High over the state (which is fairly weak with H5 only around 595dm) & considering how dry it’s been lately. Must be a decent ML shortwave tracking southwestward on southeastern periphery of High edging north now. But ‘was nice to see a darker sky earlier today and a little thunder after a couple weeks of nothing around me. Multi-model output thunder probs starting to show some enhanced areas over mid-upper coast Monday morning.

Looks like a more convectively active pattern will be returning this weekend into next week over the Coastal region (particularly mid/upper-coast into SETX), & start taking more of the edge off this mostly ‘been typical’ August furnace heat. This pattern change would be on-schedule around here for late August (regardless of any TC influence). Also been seeing a few thunder cells popping up near Galveston late last night & right now. Multi-model output thunder probs aren’t too high through next week, but are definitely there each day before higher & more widespread areas start showing up into next weekend. Odds of seeing any hurricane strike this year in STX is looking slim now coming into late August (is latest if it were to happen). Which is good. Overnight lows have been staying pretty high in the mid 80s around here this morning, likely due to LL thermal ridging overhead & 90 F coastal water temp. Though despite looking at SPC 0Z compiled obs UA data, 850Mb temps are definitely above 20 C over STX if sfc temps are still mid-80s near the coast right now (as of posting this).

FWD & Del Rio (DRT), 12Z obs soundings this morning definitely confirming some steep ML lapse rates also (about 7.0 C/km). Which is pretty steep for this time of year. Already some more substantial cells starting to pop up just south of DFW (like CAMs were depicting on yesterday evening 0Z runs).

Looks like some decent non-trop convective action popping up over CTX region this afternoon (south of DFW area) with another boundary backdooring into the state. Seeing lower 60 F DPs, and decent northerly surface flow and pressure rises in NTX now early this morning around Wichita Falls. SPC highlighting MRGL risk area on today’s D1 outlook for possible damaging wind gusts. All this summer TX heat (more 100s if front is in NTX) and some more decent ML shortwave energy rotating south (seeing evidence of that with storms ongoing over Panhandle and OK near the Red River early this morning), from the Plains around the furnace High off to the northwest will probably foster some decent overall instability around CTX at least till sundown today. So wouldn’t doubt at least a few pulse supercells (despite lack of DL shear this time of year). - Most CAM runs from yesterday evening are indeed showing initiation by late afternoon north/east of Austin then basically marching southwest as more of a linear cluster into San Antonio area (will likely be a substantial outflow if the storms happen), into the evening.

Fairly large MCC popped up late last night (after 3 am) just east of Houston and made some decent southwestward progress down the coast before dissipating mid-morning. The ABC 13 east-facing tower cam had front row seat of the lightning show not far from the city before it got daylight this morning. But ‘did also get to see how it was like underneath it in a more modest intensity on an island surf cam around Bolivar Peninsula.

Just saw that was a pretty strong little cluster in The Woodlands area a few hours ago (before dissipating), looking at lightning analysis data. Quite frequent & sig amount of positive CGs. There’s also a backdoor front in the state as DFW sounding has come in a lot drier compared to 12Z sounding Saturday morning. Mid-level RH is around 10% & near 30% low-level on 0Z SPC sounding tonight. Surface DP was near 50 F. There’s good evidence of the boundary’s presence with 700Mb moisture pooling swath in ETX on compiled 0Z obs sounding data. - The front could get some more southward progression assistance today & Monday with the northerly flow influence on outer western quadrant of TS Debby going into eastern Gulf coastal region. Especially if it gets stronger into hurricane as I’m seeing on NHC intensity forecast.