Almost lost count of the use of "hone in on" in this discussion.
Confidence still highest in heavy rainfall with tropical downpours
associated with Elsa as it moves through. PWAT values will get up to
2-2.25 inches, which is around the maximum for this time of year per
SPC Sounding Climatology for CHH. Unsurprisingly, will have warm
cloud layer depths between 3.5-4.5 km, so will have very efficient
rainfall processes going on. Still some uncertainty on the track,
which will delineate where the heaviest QPF is located and where the
wind risk will be. Right now the greatest probabilities of 24 hr QPF
AOA 1 inch are highest across the interior per the EPS/GEFS
guidance, which falls in line with a more inland track as shown by
the latest ECMWF. Will really need to hone in on this track for
determining where the highest rainfall amounts are anticipated. This
is somewhat in contrast to some of the latest deterministic guidance
showing the highest swath from eastern CT/RI into eastern MA. So,
will need to really hone in on the track to determine where the
heaviest rain will fall and where there could potentially be a flood
threat especially given the recent rains we`ve received. Went with
the latest WPC guidance for QPF. Agree with the WPC latest Day 3
Excessive Rainfall Outlook.
As stated in the previous section, will really need to hone in on
the track of Elsa to determine not only the heavy rainfall risk, but
also where the damaging wind risk will be highest. The latest
ECWMF/NAM guidance are concerning given we have a 60-70+ kt
southerly 925 hPa jet associated with Elsa crossing eastern portions
of the CWA. Other pieces of deterministic guidance are a bit more
muted with the strength of this jet, but have really just thrown out
the GFS in the latest update as it appears to keep the core too far
offshore, which is counter to the ECMWF/UKMET/ICON/NAM and GEM
guidance. Will need to watch this closely. Once again will refer
folks to the official NHC page for the official track/timing of Elsa
as it moves through the region.