It seems a change is in progress. Interesting!
Area Forecast Discussion
National Weather Service Austin/San Antonio TX
333 AM CDT Tue Nov 1 2016
.SHORT TERM (Today through Wednesday)...
Continued well above normal temperatures expected today and
Wednesday with rounds of morning fog and clouds. There could be
patchy drizzle during the morning hours and an increase in
isolated to scattered showers and a few thunderstorms along and
east of I-35 both days.
Water vapor channels currently reveal and mid-and upper-level low
over south-central Texas overtop a moist boundary layer. Low
clouds have developed mostly region wide with the exception of the
Rio Grande Plains. With such low-level saturation in place, expect
patchy areas of fog and even some light drizzle being possible
through mid-morning. PWATs will increase across the southeast
plains and thus mixed-layer instability will as well. Greater
instability along with residual mid-layer shortwave troughing
should allow for slightly greater coverage of showers and a few
thunderstorms east of I-35 this afternoon. NAM/GFS BUFR soundings
suggest greater capping towards the I-35 corridor during the
afternoon. So as storms develop in the coastal plains, they should
weaken into mostly light and moderate showers as they approach the
I-35 corridor this afternoon.
Overnight - expected a repeat of low clouds and pockets of
drizzle as moisture climbs higher and farther west. The mid- and
upper-level troughing appear to shift NE by Wednesday but given
higher instability over a greater area, another round of diurnal
instability driven convection will likely occur Wednesday
afternoon for much of the region other than the immediate Rio
Grande area. There does not appear any great concentration of
rainfall but localized downpours although brief, could be heavy at
times.
&&
.LONG TERM (Wednesday Night through Monday)...
[i]Rain chances will increase further on Thursday as a weak cool
front approaches and passes through the region. Rain and
thunderstorm chances increase to 50-60% Thursday but again,
overall rain amounts should be limited to less than an inch. Drier
weather is expected for the weekend
with models needing to be
watched for early and mid next week for the potential of a heavier
rainfall episode.Stronger troughing across the Great Lakes and stronger surface
high pressure in the Central Plains in its wake will force a
back-door front through Thursday into early Friday morning.
Overall forcing will be lacking with only weak isentropic upglide
in place. The extra clouds and rain showers should help keep us
cooler but we`ll still remain near normals for this time of year.
Drier air will pivot in from the NE for the weekend but it will be
short-lived with southerly flow returning by Sunday afternoon
ahead of series of passing troughs in the Central Plains.
Models and subsequent sensible weather will need to be monitored
for mid next week as a potentially deeper trough could pivot
across Texas. GFS dprog/dT has had a decent handle on this
solution with the EC not being as consistent. However, the latest
00Z EC has started to trend towards the GFS that indicates the
potential for heavier rain episode mid-next week. Will continue
to monitor these trends and if higher and heavier rain chances
come to fruition.[/i]
The preceding post is NOT an official forecast, and should not be used as such. It is only the opinion of the poster and may or may not be backed by sound meteorological data. It is NOT endorsed by any professional institution including storm2k.org. For Official Information please refer to the NHC and NWS products.