Combine 5 cups watermelon and the cranberry juice in the jar of a blender, and puree until mixture is smooth. Pass through a fine sieve into a large bowl or plastic storage container, discarding pulp. You should have 3 cups strained liquid.Advertisement
Add cucumber, celery, bell pepper, onion, herbs, lime juice, vinegar, jalapeno, and remaining cup chopped melon to watermelon liquid, and stir to combine. Cover with plastic wrap, and place in refrigerator until soup is well chilled, at least 1 hour. Serve, or store in refrigerator up to 1 day.
Watermelons range in weight from fifteen to thirty-five pounds, depending on the variety; three pounds will produce about six cups of chopped fruit. Discard the seeds before using.