This page has daily 12Z model output discussion as it comes in. Discussion updated Monday-Friday by 12:00 NOON.
HEADLINE: MID-DAY GFS QUICKER WITH RETURN OF RAINS TO SOUTHERN BRAZIL…
North America: No major changes. The early week 2 storm is a little weaker and faster, though still yields accumulating snows over the western Lakes and central corn belt.
South America: The mid-day GFS continues a trend from 00z and 06z of slightly lower precip over the next 8 days for Minas Gerais and Bahia and higher totals through day 10 for central RGS north to MGS by 0.25″ or so.