Nailed it!
Model Trends ...
00z models including CAMs have trended slower with arrival of cold
front and associated convection with bulk of thunderstorms arriving
after 00z. Given storms arrive well after peak heating and lack of
steep mid level lapse rates to sustain severe convection after
sunset, severe threat is slightly lower than earlier thought along
with area of greatest risk shifted farther north and west, mainly
north of the Mass Pike and west of I-495. Thus SPC has shifted
the enhanced risk area farther to the north and west from
yesterday`s issuance.