It'll be another warm day in the Capital Region with temperatures climbing into the mid-20s.
However, a cold front will crash across the area late afternoon/early evening.
The attached map is for 6pm today.  So, we're on the warm side of the front most of today.
Behind the cold front, daytime highs will slip into the 18-21 range for the rest of the week & the long weekend.

We'll also likely see some showers & thunderstorms develop in parts of Central Alberta early this evening.
Areas just south of Edmonton have a higher risk of getting those storms than areas north of the city.
These should be non-severe thunderstorms, but there is the potential for a few pockets of small hail.
ROUGH timeframe is:  
Late afternoon for the foothills
6-10pm for areas from Edmonton south to Red Deer.
8-Midnight for areas from Lloydminster south to Coronation.

The Capital Region could see a "second wave" of showers push through overnight or early Thursday morning.
But, we should get a bit of clearing Thursday afternoon.
Increasing cloud on Friday as another system moves in from the WNW.  
Showers should develop in W & NW Alberta late Friday.
The trough may drag some showers through the Edmonton area Friday night/early Saturday morning.
By Saturday afternoon, those showers are already starting to move out of E & NE Alberta.

Sunday & Monday look dry...with temperatures staying in the 18-21 range.


Here's the Edmonton forecast:

Today - Sun this morning, increasing afternoon cloud.
High:  25

Tonight - Mostly cloudy.  60% chance of showers and/or thunderstorms.
Low:  11

Thursday - 30% chance of an early-morning shower.  
Clearing to a Mix of sun & cloud in the afternoon.
High:  20

Friday - Partly cloudy in the morning.  Increasing afternoon cloud.
40% chance of evening and/or overnight showers.
Morning Low:  9
Afternoon High:  21

Saturday - Mostly cloudy.  40% chance of scattered showers in the morning.
Clearing to a Mix of sun & cloud in the afternoon.
Morning Low:  10
Afternoon High:  20

Sunday - Partly cloudy.
Morning Low:  8
Afternoon High:  19

Monday - Partly cloudy.
Morning Low:  8
Afternoon High:  18