Analyze the following Tweet and provide an accurate sentiment score.
Weather today is really bad :(
The sentiment score for this tweet is negative due to the use of words like "bad" and the sad emoticon ":(" indicating that the person is unhappy or disappointed with the weather.
Complete the following task based on the instruction and optional input provided.### Instruction:
Analyze the following Tweet and provide an accurate sentiment score.

### Input:
Weather today is really bad :(

### Output:
The sentiment score for this tweet is negative due to the use of words like "bad" and the sad emoticon ":(" indicating that the person is unhappy or disappointed with the weather.