This page has daily 12Z model output discussion as it comes in. Discussion updated Monday-Friday by 1:15p.
HEADLINE: GFS MUCH DRIER THAN WEEKEND RUNS ACROSS U.S. CORN BELT OVER NEXT 10 DAYS…
North America: The 12z GFS continues to evolve towards a much drier solution pattern for the corn belt on days 6-10. The track of a weekend/early weekend disturbance not only shifts south on this run, with it is also notably weaker at 12z than 06z/00z so totals have declined in the Plains and Delta as well. Days 8-10 are also slightly cooler across the central U.S., though still generally warmer than average.
South America: The mid-day GFS is little changed in South America overall with the distribution of precip (dry south/wet north) over the next 10 days, but net rain totals have nudged downward for most relative to the last several model runs.