With a mix of clouds & sun, temperatures are 76-82 over the viewing area as of 2 p.m. with a nice northeast breeze. As I type this, I have an 81 on our WLFI ob site sensor with a dew point of 61 with northeast wind at 7 mph.
Highs will tend to run near 80 to as high as 85 today with that northeast wind & the potential of a couple/few isolated showers.
It appears that the better rainfall coverage is shifting from Saturday night to Sunday midday to tonight through Saturday afternoon.
Showers will move up from the south & coverage should run at near 65% with lots of clouds Saturday & highs varying from 73-80 (warmer far north where there will be less in the way of rainfall). I went for 75 for Greater Lafayette. There may be an isolated rumble of thunder in the far southeast.
Some locally-heavy rainfall is possible.
This, after lows tonight in the 60s to near 70.
Winds on Saturday will be from the northeast at 10-20 mph.
This evening to Saturday morning:
Saturday late morning through afternoon:
A good chunk of the rainfall will exit Saturday night (coverage drops from 65% to 40%).
Sunday, with clouds & some sun, a few showers & t'showers are possible with around 35% of the rainfall.
Highs Sunday should run 77-82 (81 Greater Lafayette) after morning lows in the 60s.
Meanwhile, Hurricane Isaias will batter parts of Florida & then move toward the Carolinas.
This large-scale feature (& the low's occlusion) will cause our low (old Hanna circulation) to make that left jog, increasing rainfall potential Saturday.
Meanwhile, today to Saturday & Sunday will feature considerable severe weather risk from Arkansas & Mississippi, through Kentucky & Tennessee to southeast Indiana, Ohio, West Virginia to Maryland & Pennsylvania, then the Northeast.
However, it is really the stronger upper trough Sunday night-Monday that will be the force to keep Isaias' center largely offshore.
That is good & bad.
It is good in that there may not be a landfall until possibly Massachusetts.
It is bad because it will still be over warmer water & will maintain a degree of strength as it rides off the East Coast, battering all or parts of 14 states.
It may also still be a hurricane or tropical storm off the Northeast coast or when it does make a landfall.
It could even become more of a hybrid storm as our upper trough merges with it.
Regardless, high waves, wind damage, tidal flooding & flooding rainfall will occur all along the East Coast.
We will have a scattered of showers & storms Monday (60%) with highs 77-81, followed by a few isolated showers with 77-82 Tuesday.
With surface high settling right overhead Tuesday & Wednesday nights, two nights of lows well down into the 50s with areas of fog are possible.
Daily highs will be nice with 78-83 by Wednesday (after that 77-82 Tuesday) & 80-85 Thursday.
Then we begin to heat up & turn muggy with multiple MCSs (complexes of storms) or "Ridge Riders in the Plains.
We will see a few of these or their old MCVs will pop new storms next weekend & early next week.
Highs may return to 88-92 with heat indices 96-102.
Trend continues to be a mid-August cool-down with more 70s to lower 80s with lows in the 50s after storms.
However, there still continues to a signal of much hotter weather in two main waves of heat in late August & early September with 90s as we dry out.
After that, a mid-September cool-down should bring temperatures back to normal to (normal by that time is highs in the 70s, lows in the 50s).
Of course, the tropics are a bit of a wildcard as they ramp up toward peak & Cape Verde season amps up (as Saharan dust will not be a factor at this point).