After a warm open to April, we note the MJO is heading into Phase 2 in the medium range. Phase 2 this time of year would imply for a cooler than normal pattern.
Sure enough we see the modeling going towards the cooler look for Week 2 (around 4/17…give or take a day, or two).
Note the GFS ensembles reverse course towards a cooler regime after the warm period currently.
The European ensembles (left) show a tendency for eastern troughiness, as well.
This isn’t saying some sort of record-smashing cold pattern is coming or anything of that sort, but it is to say that after a warm open to April, we’ll reverse things for a few days, at least, during the medium range period. This could include a push of frost and freeze conditions, as well.
In the shorter-term, please remain weather aware tonight and keep close tabs on watches and warnings issued by the National Weather Service. Thunderstorms should push into central Indiana around midnight and will be capable of severe levels, including damaging hail, destructive straight line winds, and quick spin-up tornadoes.