The Sentence Diagram Generator visually represents the grammatical structure of the sentence: "Forecasting technologies are more sophisticated and today's forecasters are better trained, but weather predictions are still not very reliable."

1. Main Clause 1: "Forecasting technologies are more sophisticated"

   • Subject: "Forecasting technologies"
   • Verb: "are"
   • Complement: "more sophisticated"

2. Main Clause 2: "today's forecasters are better trained"

   • Subject: "today's forecasters"
   • Verb: "are"
   • Complement: "better trained"

3. Conjunction: "and"

4. Coordinating Conjunction: "but"

5. Main Clause 3: "weather predictions are still not very reliable"

   • Subject: "weather predictions"
   • Verb: "are"
   • Adverbial: "still"
   • Negation: "not"
   • Complement: "very reliable"

The diagram would visually connect these elements, illustrating the relationships between the clauses and their components.