| Area | Forecast Region |
| 421 | Attawapiskat |
| 422 | Fort Severn |
| 423 | Peawanuck |
| 424 | Big Trout Lake – Sachigo Lake |
| 425 | Sandy Lake – Pikangikum |
| 426 | Pickle Lake – Wunnummin Lake |
| 427 | Fort Hope – Webequie |
| 471 | Red Lake – Ear Falls |
| 472 | Sioux Lookout – Savant Lake |
| 473 | Kenora – Nestor Falls |
| 474 | Dryden – Ignace |
| 475 | Fort Frances – Rainy Lake |
| 481 | City of Thunder Bay |
| 482 | Lake Nipigon – Wabakimi |
| 483 | Geraldton – Manitouwadge – Hornepayne |
| 484 | Atikokan – Upsala – Quetico |
| 485 | Superior West |
| 486 | Nipigon – Marathon – Superior North |
| 487 | Wawa – White River – Pukaskwa |
| 488 | Sault Ste. Marie – Superior East |
| 491 | Greater Sudbury and vicinity |
| 492 | Elliot Lake – Ranger Lake |
| 493 | Moosonee – Fort Albany |
| 494 | Kapuskasing – Hearst |
| 495 | Timmins – Cochrane |
| 496 | Chapleau – Gogama |
| 497 | Kirkland Lake – New Liskeard – Temagami |
| 498 | North Bay – West Nipissing |
| 499 | Manitoulin – Blind River – Killarney |
