| Time | evaluation variable | SWAN | NOWCAST |
| April 2017 | 1 hour storm TS score | 16.3% | 16.6% |
| 1 hour storm TS miss rate | 79.9% | 55.0% | |
| May 2017 | 1 hour storm TS score | 16.8% | 16.6% |
| 1 hour storm TS miss rate | 80.0% | 62.1% | |
| June 2017 | 1 hour storm TS score | 16.6% | 16.4% |
| 1 hour storm TS miss rate | 80.9% | 58.6% |