Surface high pressure over the northern plains will build southeast toward us, keeping conditions clear and calm. Above normal temperatures will be common mid to late week, before colder air moves in early next week. Other than a few isolated showers on Sunday, dry weather will continue. Latest satellite and observations show surface high pressure centered just to the west over Illinois with clear skies and winds ranging from calm to 5 mph.
High pressure slowly slides southeastward over the region today with the weather conditions forecast to be nearly a carbon copy of yesterday. As some upper energy moves through the trough to the northeast, a surge of cooler air will move into the northeastern USA. Indiana will get sideswiped by this, which will lower temperatures a few degrees for parts of the forecast area on Thursday. On Friday, the upper ridge to the west will nose into the area, allowing more warm air to move in.
The result will generally be a continued trend of above normal temperatures, with highs in the 70s, reaching around 80 for parts of the area on Friday. The nose from the upper ridge will shift a little south on Saturday, allowing a surface cold front to move into the area. However, it will have no moisture to work with. The cooler air with this front will remain well north, so warm temperatures will continue on Saturday. A surface low will move along the front as another upper trough moves in on Sunday. Moisture will continue to be limited, so only isolated showers will be possible with this system. Warm temperatures will continue as cold advection doesn`t really kick in until late in the day. Behind the system, colder air will move in and return the area to near or below normal temperatures early next week.
INDY SEVEN DAY FORECAST
Today: Sunny. High 72.
Tonight: Clear. Low 45.
Wednesday: Sunny. High 76.
Wednesday Night: Clear. Low 46.
Thursday: Sunny. High 74.
Thursday Night: Clear. Low 45.
Friday: Sunny. High 78.
Friday Night: Mostly clear. Low 56.
Saturday: Mostly sunny. High 79.
Saturday Night: Mostly clear. Low 53.
Sunday: Partly sunny. Spotty showers. High 74.
Sunday Night: Spotty evening showers, then clearing. Low 45.
Monday: Mostly sunny. High 60.
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