When there's a significant pattern change in the works, chances are you can pick it up early by observing the trends of the MJO (Madden Julien Oscillation). It measures energy transfer tied to convection in the tropical Pacific. It's latest forecast shows the the oscillation swinging out of phase 2 and into phase 3 the remainder of June. (Follow the dotted green lines below)
If you look at the phase correlation above you can see that phase 3 points to widespread below normal temperatures over the central U.S. The EURO weeklies out Thursday night are in total agreement showing these amazing temperature anomalies the next 7 days.
That's followed up by the day 7-11 departures which aren't much warmer
Here's the forecast temperatures the next 15 days in Cedar Rapids. From June 23rd to July 6th. Not a single day with and above normal high.
Chicago looks like this.
If you're headed to the boundary waters for some rest and relaxation...take warm clothes. Look at these highs the next 15 days in Ely, Minnesota.
If you go back to the phase diagram at the top you can also see that phase 3 is wet over the majority of the Midwest. The regions in green depict above normal precipitation in the period ending July 6th.
32 day precipitation looks like this.
Now that you have your MJO back, you can impress your friends and family with a prediction of cool weather the rest of June. Quite a change from all the 90s we saw earlier in the month. Roll weather and have a terrific weekend...TS