Hottest Air Of The Year This Week

The time for talk is nearly over, with central Indiana’s longest stretch of 90 degree days and hottest air of the year arriving this week.  Our advice is to get out and enjoy the more than tolerable humidity in place this evening.  5pm temp in Indianapolis was 87 and humidity below 35%!


Dewpoints this evening are in the comfortable range below 60.  As moisture increases Monday, you’ll begin to feel the increasing humidity.

MUGGYMETERThe end result will be a climbing Heat Index that possibly climbs over 100 degrees Tuesday and Wednesday.  If this forecast verifies… Heat Advisories may be issued for mid-week.  Stay tuned.

 MUGGYMETER_2In the relatively drier air tonight, lows will be pleasant in the 60s.  It’s possible that some patchy fog develops by dawn tomorrow.  Check in with Chuck Lofton in the morning for an update.

 LOWS_TONIGHT highs_tomorrow

Highs Monday should hit 90 degrees… marking the beginning of long stretch of unseasonably warm days.

plannerpm RPM

Central Indiana will be under the influence of sinking air associated with a strong late season upper level high.  We call it the “hot dome” due to the intense that develops in its sinking air. 

RPM_1On the periphery of the hot dome is what we call the “ring of fire”… this where most precipitation occurs within this type of pattern.  A few weak disturbances, called “ridge runners”, will near northeast Indiana Wednesday.  But I have serious doubts they’ll survive far from the best atmospheric lift that will positioned over the Great Lakes.

  JETSTREAM_2Long range model trends show the looming heat streak lasting well into the upcoming holiday weekend… and possibly beyond Labor Day in central Indiana.


My latest 7 day forecast reflects the hot, dry pattern I just talked about.  Daytime highs will be a good 10 degrees above normal.  Though atmospheric temperature profiles support near 100 degree heat… I think enough moisture prevents that from happening.  However, it will still feel like upper 90s/lower 100s for a few days.  Thanks for reading the blog and have a great evening – Sean Ash