Monday-Thursday: cyclogenesis over central CONUS will allow for
consistent moisture return, as this will help PWs rise to 1-1.5in
and dewpoints rise into the mid 60s in the area by Monday/Tuesday.
With the main cold front progged to push through the area sometime
Monday into Tuesday expect lingering showers and thunderstorms to
remain in the forecast through Thursday. While this will be a
prolonged period of rain, some higher amounts will be possible
Monday/Tuesday if the system becomes convective. Flash flooding is
not a concern for this event as previous dry conditions and the
expectation for accumulation of many hours will allow for soils to
rebound quite fast. As the main frontal boundary pushes through
there looms the threat for severe weather. Most models are
consistent that most of the rain will be stratiform but show a good
environment. The GFS shows that the storm environment could
produce severe storms. Both Monday and Tuesday seem to have good
lapse rates, ascent trailing the main boundary signaling another
source of instability, high vertical totals >27 and strong deep
level shear around 50ks. While timing is not a certain and
confidence is low, the possibility for severe weather remains.
However, wl not mention this potential in the HWO graphics at this
time. As the event nears and more models show consistency there
may be a need for graphics in the future. This prolonged period of
rain will end all fire weather concerns in the near future
following the period