#216 Postby weatherdude1108 » Mon Sep 10, 2018 4:01 pm
Area Forecast Discussion
National Weather Service Austin/San Antonio TX
318 PM CDT Mon Sep 10 2018
.SHORT TERM (Tonight through Tuesday Night)...
Light rain with embedded pockets of moderate rainfall are persisting
across much of the region this afternoon. Water vapor imagery shows
drier low-level air working its way into the region from Mexico and
this will help diminish the overall heavy rain threat over the next
few hours and have cancelled the Flash Flood Watch as a result. Still
cannot rule out some minor flooding issues through the evening,
however. An upper trough axis will continue to straddle the region
tonight and at least isolated shower activity will likely linger
along and east of the I-35 corridor. Cloud cover associated with this
rain should linger across most of the area save for the Edwards
Plateau and parts of the Rio Grande Plains where drier air is located
with overnight lows in the mid 60s to lower 70s.
Daytime heating will allow for scattered shower and thunderstorms to
develop across the Coastal Plains on Tuesday with highs in the 80s
across the region. Depending on how far east the trough axis is able
to move tonight, some of this activity may be able to develop as far
west as the Hill Country. Activity will diminish some in coverage
Tuesday night, but lingering upper level forcing will keep at least
low rain chances in the forecast for the Coastal Plains. Expect lows
in the mid 60s to low 70s Tuesday night.
&&
.LONG TERM (Wednesday through Monday)...
Similar conditions are expected on Wednesday and Thursday as the
upper trough lingers over the state with scattered showers and
thunderstorms developing across the coastal plains and towards the
I-35 corridor as temperatures rise into the mid 80s to near 90 each
day. The forecast for Friday through Monday will be largely dependent
on the evolution of a tropical wave in the Caribbean this afternoon.
12Z guidance brings this wave across the Yucatan Peninsula and into
the northwest Gulf Thursday into Friday, but remains inconsistent on
the trajectory and intensity of this wave as it moves towards Texas.
Wind shear over the northwest Gulf weakens mid to late this week,
which may help the wave develop further into a tropical depression
as it approaches the Texas coast. Regardless of whether or not
additional tropical development occurs, tropical moisture associated
with this feature will result in increasing rain chances... and the
potential for heavy rain... for the region. Rain associated with this
wave may linger into Monday. Rain and cloud cover will help keep
temperatures near to below seasonal normals this weekend, with highs
in the 80s to near 90.
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