Mi Mom's Cool Cucumber Salad

4 cucumbers (about 2 1/2 pounds), peeled and sliced into 1/4-inch rounds
1 small sweet onion, thinly sliced into rings
Kosher salt
1/2 cup sour cream
1/4 cup chopped fresh dill
2 tablespoons white vinegar 
Freshly cracked black pepper
1 Tsp Garlic powder to taste
1 Tbsp Granulated sugar
1 1/2 cups Miracle Whip
1. Mix cucumbers, sweet onion, and sea salt together in a bowl. Cover bowl with plastic wrap and let sit for 30 minutes.
2. Turn cucumber mixture into a colander set over a bowl or in a sink; let drain, stirring occasionally, until most of the liquid has drained, about 30 minutes more. Transfer drained cucumber mixture to a large bowl.
3. Stir mayonnaise, vinegar, sugar, dill, garlic powder, and black pepper together in a bowl with a whisk until smooth; pour over the cucumber mixture and stir to coat vegetables with the dressing.
4. Cover the bowl with plastic wrap and refrigerate at least 2 hours.
5. *Best served the next day.