Highs Wednesday varied 64-78, coolest where rain & cloudy skies hung on longer & warmest where there was more sun & a lack of rainfall.
After areas of dense fog this morning (Logansport, Grissom, Kokomo, Rochester, Rensselaer, Winamac all reported visibility less than 0.50 mile), as of 1:15 p.m., temperatures are 72-82 over the viewing area. It is coolest in the southeast & east with more clouds. It is mostly sunny in Greater Lafayette & northwestward, leading to temperatures there largely 79-82.
As for the rest of the day, highs of 76-86 are expected with sun & clouds (more clouds southeast & east). A couple isolated showers/storms are possible variable clouds from mostly sunny in heart of the area to mostly cloudy in the far southeast & east.
Patchy fog & partly cloudy skies are expected tonight with lows 58-65.
Friday will be mostly sunny & hotter & more humid with highs 87-92 & heat indices 90-96.
Widespread record heat will occur from Montana to Manitobe to New Brunswick, across New England & then back to Michigan, Minnesota & the Dakotas. Widespread 90s to 100s will occur. Heat indices by next week in the Northeast may reach 111.
Here, we will likely see an early season heat wave in parts of the viewing area with 90 or greater for potentially 7 days (possibly longer).
South of the heat wave, on the underbelly of the upper ridge, it will actually be cooler & wet with tropical downpours from Florida, across the Deep South to Oklahoma.
Meanwhile, a "Ring of Fire" band from Montana to New Brunswick will have complexes of severe storms.
New data suggests that we may stay hot & humid through June 13 with a cold front passing around June 14 with more widespread showers & storms.
In the meantime, Friday to Sunday looks dry, hot & humid with 89-96 (heat indices 92-101) by late in the weekend. Lows will run 66-71.
Daily scattered pop-ups of storms will occur Monday-Friday of next week. Coverage of the storms early in the week will run 30%, then increase to 40% late in the week.
Any severe weather risk would be isolated from pulsey storms in the boiling heat & instability. They look like slow-movers, so pockets of heavy rainfall will be possible in these hit-or-miss downpours. The mid & upper wind support will be nil.
This will cut the heat at intervals.
Temperatures June 4-10:
Trend to mid-July overall is wetter than normal far southern Indiana to North Carolina to Texas & especially heavy rainfall in the South.
Band of overall below normal rainfall should occur Kansas & Colorado to Iowa, northern Indiana to New England.
"Ring of Fire" pattern will make eastern Montana to the Canadian Prairie to Minnesota & southern Ontario & northern Maine to New Brunswick wetter than normal.
Temperature trend to mid-July should feature hotter than normal weather from California to the Midwest & over New England & across Ontario.
The cooler than normal conditions will set up in British Columbia & also over Texas & Oklahoma to the Deep South.
We will continue to monitor the increasingly-active tropics for influences here. If we can get remnants of a tropical system or two, this could bring a lot of rainfall.
I went for continued hotter & drier regime in early August, but I prefer to go with cooler than normal pattern in late August & I actually am trending more toward wetter than normal weather in late August.
September looks cooler than normal with below normal rainfall, but tropical systems will be frequent, so this could easily change to the wetter.
I am still going with warmer than normal October to December, but colder than normal January-February.
I prefer below normal precipitation much of Fall to the first half of winter, but increasingly above normal precipitation getting into January-February period.