Forecast region

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A forecast region is a unique geographical area for which individual weather reports are issued.

Canada

In Canada, the Meteorological Service divides the country into several forecast regions for the purpose of issuing routine text forecasts and weather warnings, as Canada's provinces and territories do not use a common second-level administrative division scheme similar to the division of states into counties and parishes in the United States. Due to the localized nature of some weather phenomena, such as freezing rain storms and tornadoes, some forecast regions that have been found to be more prone to such phenomena are further divided into sub-regions, especially in the Prairie provinces. Parts of Northern British Columbia, Northern Quebec, Labrador, and the territories do not belong to any forecast region, owing to the lack of any significant population in those areas.

With the implementation of Specific Area Message Encoding into the Weatheradio Canada service in 2007,[1] each forecast region and sub-region has been given a unique six-digit code known as a Canadian Location Code, or CLC.[2] These codes are programmed into SAME-capable weather radio receivers the same way FIPS county codes are programmed into receivers in the United States, enabling them to only activate and sound an alert when the MSC issues weather warnings for the forecast regions that have their codes programmed into the receivers. Outside of Nunavut and the Northwest Territories, CLCs are assigned using the format 0paabb, where 0 is a constant, p is a province or provincial or territorial grouping, aa refers to a specific forecast region, and bb, if nonzero, refers to a sub-region. In Nunavut and the Northwest Territories, the format is 09aaa0, where aaa refers to the forecast region. The format is different in those territories because their population densities are much lower than elsewhere in the country.

List of forecast regions by province and territory

If viewing this page online, each forecast region name is linked to a page on the MSC's website detailing all watches and warnings currently in effect for that region.

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CLC Region Sub-regions
031100 Gatineau
031200 Waskaganish
031300 Matagami
031400 Abitibi
031500 Temiscamingue
031600 Réserve Faunique La Verendrye
031700 Pontiac
031800 Mont-Laurier
031900 Upper Gatineau-Lièvre-Papineau
032100 Parc du Mont-Tremblant - Saint-Michel-des-Saints
032200 Laurentides
032300 Lachute-Saint-Jérôme
032400 Montréal Metropolitain - Laval
032500 Vaudreuil - Soulanges - Huntingdon
032600 Lanaudière
032700 Mauricie
032800 Québec
033100 James-Bay and La-Grande-Rivière
033200 LG-Quatre - Laforge and Fontanges
033300 Schefferville
033400 Fermont
034100 Chibougamau
034200 Parent-Réservoir Gouin
034300 Lac-Saint-Jean
034400 La Tuque
034500 Rivière Manicouagan
034600 Les Escoumins-Forestville
034700 Saguenay
034800 Charlevoix
034900 Réserve Faunique des Laurentides
035100 Rimouski - Mont-Joli
035200 Matane
035300 Amqui-Vallée de la Matapedia
035400 Sainte-Anne-des-Monts - Grande-Vallée
035500 Parc National de la Gaspésie - Murdochville
035600 Restigouche-Bonaventure
035700 New-Carlisle - Chandler
035800 Parc National Forillon - Gaspé - Perce
036100 Baie-Comeau
036200 Sept-Îles - Port-Cartier
036300 Minganie
036400 Natashquan
036500 Chevery
036600 Blanc-Sablon
036700 Anticosti
036800 Îles-de-la-Madeleine
037100 Vallée du Richelieu-Saint-Hyacinthe
037200 Drummondville - Bois-Francs
037300 Eastern Townships
037400 Beauce
037500 Montmagny - L'Islet
037600 Kamouraska - Rivière-du-Loup - Trois-Pistoles
037700 Témiscouata
038100 Ivujivik
038200 Akulivik
038300 Puvirnituq
038400 Inukjuak
038500 Umiujaq
038600 Kuujjuarapik
039100 Salluit - Raglan Lake
039200 Kangiqsujuaq
039300 Quaqtaq
039400 Kangirsuk
039500 Aupaluk
039600 Tasiujaq
039700 Kuujjuaq
039800 Kangiqsualujjuaq

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CLC Region Sub-regions
041100 Simcoe - Delhi - Norfolk
041200 Dunnville - Caledonia - Haldimand
041300 Sarnia - Lambton
041400 Windsor - Essex - Chatham-Kent
041500 London - Middlesex
041600 Elgin
041700 Oxford - Brant
042100 Attawapiskat
042200 Fort Severn
042300 Peawanuck
042400 Big Trout Lake - Sachigo Lake
042500 Sandy Lake - Pikangikum
042600 Pickle Lake - Wunnummin Lake
042700 Fort Hope - Webequie
043100 City of Toronto
043200 York - Durham
043300 Belleville - Quinte - Northumberland
043400 Stirling - Tweed - South Frontenac
043500 Kingston - Prince Edward
043600 Brockville - Leeds and Grenville
043700 Cornwall - Morrisburg
044100 Barrie - Orillia - Midland
044200 Burk's Falls - Bayfield Inlet
044300 Algonquin
044400 Parry Sound - Muskoka
044500 Haliburton
044600 Bancroft - Bon Echo Park
044700 Peterborough - Kawartha Lakes
045100 Prescott and Russell
045200 Renfrew - Pembroke - Barry's Bay
045300 Smiths Falls - Lanark - Sharbot Lake
045400 City of Ottawa
046100 City of Hamilton
046200 Grey - Bruce
046300 Huron - Perth
046400 Waterloo - Wellington
046500 Dufferin - Innisfil
046600 Halton - Peel
046700 Niagara
047100 Red Lake - Ear Falls
047200 Sioux Lookout - Savant Lake
047300 Kenora - Nestor Falls
047400 Dryden - Ignace
047500 Fort Frances - Rainy Lake
048100 City of Thunder Bay
048200 Lake Nipigon - Wabakimi
048300 Geraldton - Manitouwadge - Hornepayne
048400 Atikokan - Upsala - Quetico
048500 Superior West
048600 Nipigon - Marathon - Superior North
048700 Wawa - White River - Pukaskwa
048800 Sault Ste. Marie - Superior East
049100 Greater Sudbury and vicinity
049200 Elliot Lake - Ranger Lake
049300 Moosonee - Fort Albany
049400 Kapuskasing - Hearst
049500 Timmins - Cochrane
049600 Chapleau - Gogama
049700 Kirkland Lake - New Liskeard - Temagami
049800 North Bay - West Nipissing
049900 Manitoulin - Northshore - Killarney

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CLC Region Sub-regions
051100 Virden - Souris
051200 Brandon - Carberry - Treherne
051300 Melita - Boissevain - Turtle Mountain Provincial Park
051400 Killarney - Pilot Mound - Manitou
052100 City of Winnipeg
052200 Selkirk - Gimli - Stonewall - Woodlands - Eriksdale
052300 Portage la Prairie - Headingley - Brunkild - Carman
052400 Dugald - Beauséjour - Grand Beach
052500 Morden - Winkler - Altona - Emerson - Morris
052600 Steinbach - St. Adolphe - Dominion City - Vita - Richer
053100 Bissett - Nopiming Provincial Park - Pine Falls
053200 Whiteshell - Lac Du Bonnet - Pinawa
053300 Sprague - Northwest Angle Provincial Forest
054100 Grand Rapids
054200 Arborg - Hecla - Fisher River - Gypsumville - Ashern
055100 Dauphin - Roblin - Winnipegosis
055200 Minnedosa - Neepawa - Russell - Riding Mountain National Park
055300 Ste. Rose - McCreary - Alonsa - Gladstone
056100 The Pas - Wanless - Westray - Clearwater Lake Provincial Park
056200 Swan River - Duck Mountain Provincial Park - Porcupine Provincial Forest
057100 Norway House - Cross Lake - Wabowden
057200 Poplar River
057300 Berens River - Little Grand Rapids - Bloodvein - Atikaki
058100 Brochet
058200 Tadoule Lake
058300 Lynn Lake - Leaf Rapids - Pukatawagan
058400 Thompson - Nelson House - Split Lake
058500 Flin Flon - Cranberry Portage - Snow Lake
059100 Churchill
059200 York
059300 Gillam
059400 Shamattawa
059500 Island Lake - Oxford House - Gods Lake

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CLC Region Sub-regions
061100 Leader - Gull Lake
061200 Swift Current - Herbert - Cabri - Kyle - Lucky Lake
061300 Shaunavon - Maple Creek - Val Marie - Cypress Hills
062100 City of Regina
062200 Moose Jaw - Pense - Central Butte - Craik
062300 Fort Qu'Appelle - Indian Head - Lumsden - Pilot Butte
062400 Assiniboia - Gravelbourg - Coronach
062500 Estevan - Weyburn - Radville - Milestone
063100 Yorkton - Melville - Esterhazy
063200 Moosomin - Grenfell - Kipling - Wawota
063300 Carlyle - Oxbow - Carnduff - Bienfait - Stoughton
064100 Hudson Bay - Porcupine Plain
064200 Kamsack - Canora - Preeceville
065100 City of Saskatoon
065200 Prince Albert - Shellbrook - Spiritwood - Duck Lake
065300 Melfort - Tisdale - Nipawin - Carrot River
065400 Martensville - Warman - Rosthern - Delisle - Wakaw
065500 Outlook - Watrous - Hanley - Imperial - Dinsmore
065600 Humboldt - Wynyard - Wadena - Lanigan - Foam Lake
066100 Meadow Lake - Big River - Green Lake - Pierceland
066200 The Battlefords - Unity - Maidstone - St. Walburg
066300 Kindersley - Rosetown - Biggar - Wilkie - Macklin
066400 City of Lloydminster - SK
067100 Île à la Crosse - Buffalo Narrows - Beauval
067200 La Ronge - Prince Albert National Park - Narrow Hills Provincial Park
067300 Pelican Narrows - Cumberland House - Creighton
068100 Uranium City - Camsell Portage
068200 Fond du Lac - Stony Rapids
068300 La Loche - Clearwater River Provincial Park - Cluff Lake
068400 Cree Lake - Key Lake
068500 Wollaston Lake - Collins Bay
068600 Southend - Brabant Lake - Kinoosao

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CLC Region Sub-regions
071100 Jasper National Park
071200 Nordegg - Forestry Trunk Road Highway 734
071300 Rocky Mountain House - Caroline
071400 Banff National Park
071500 Kananaskis - Canmore
072100 Red Deer - Ponoka - Innisfail - Stettler
072200 Airdrie - Cochrane - Olds - Sundre
072300 Drumheller - Three Hills
072400 City of Calgary
072500 Okotoks - High River - Claresholm
072600 Brooks - Strathmore - Vulcan
073100 Crowsnest Pass - Pincher Creek - Waterton Park
073200 Cardston - Fort MacLeod - Magrath
073300 Lethbridge - Taber - Milk River
074100 Hanna - Coronation - Oyen
074200 Medicine Hat - Bow Island - Suffield
074300 Cypress Hills Provincial Park - Foremost
075100 Bonnyville - St. Paul - Cold Lake - Lac La Biche
075200 Lloydminster - Wainwright - Vermilion - Provost
076100 Westlock - Barrhead - Athabasca
076200 Spruce Grove - Morinville - Mayerthorpe - Evansburg
076300 Fort Saskatchewan - Vegreville - Redwater - Smoky Lake
076400 City of Edmonton - St. Albert - Sherwood Park
076500 Drayton Valley - Devon - Rimbey - Pigeon Lake
076600 Leduc - Camrose - Wetaskiwin - Tofield
077100 Grande Prairie - Beaverlodge - Valleyview
077200 Hinton - Grande Cache
077300 Slave Lake
077400 Whitecourt - Edson - Fox Creek - Swan Hills
078100 High Level - Rainbow Lake - Fort Vermilion - Mackenzie Highway
078200 Peace River - Fairview - High Prairie - Manning
078300 Wabasca - Peerless Lake - Gift Lake - Cadotte Lake
079100 Fort Chipewyan - Wood Buffalo National Park
079200 Fort McMurray - Fort MacKay

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CLC Region Sub-regions
081100 Haida Gwaii
081200 North Vancouver Island
081300 East Vancouver Island
081400 West Vancouver Island
081500 Inland Vancouver Island
081600 Greater Victoria
082100 Central Coast - Coastal sections
082200 Central Coast - Inland sections
082300 Sunshine Coast
082400 Whistler
082500 Howe Sound
082600 Metro Vancouver
082700 Fraser Valley
082800 Southern Gulf Islands
083100 Fraser Canyon
083200 South Thompson
083300 Nicola
083400 Similkameen
083500 Okanagan Valley
083600 Shuswap
084100 Arrow and Slocan Lakes
084200 Boundary
084300 West Kootenay
084400 Kootenay Lake
084500 East Kootenay
084600 Elk Valley
085100 North Thompson
085200 North Columbia
085300 Kinbasket
085400 West Columbia
085500 East Columbia
085600 Yoho and Kootenay Parks
086100 Chilcotin
086200 Cariboo
086300 100 Mile
086400 Yellowhead
087100 Bulkley Valley - The Lakes
087200 Williston
087300 BC Peace River
087400 Prince George
087500 McGregor
088100 Fort Nelson
088200 Muncho Lake and Stone Mountain Provincial Parks
088300 Watson Lake - BC
089100 North Coast - Coastal sections
089200 North Coast - Inland sections
089300 Dease Lake
089400 Cassiar Mountains - BC
089500 Teslin - BC
089600 Atlin
089700 South Klondike Highway - Carcross to White Pass
089800 Haines Road - Haines Junction to Pleasant Camp

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CLC Region
091100 Dawson
091200 Mayo
091300 Beaver Creek
091400 Pelly - Carmacks
091500 Kluane Lake
091600 Haines Junction
091700 Whitehorse
092100 Teslin - YT
092200 Cassiar Mountains - YT
092300 Watson Lake - YT
092400 Faro - Ross River
093100 Dempster
093200 Old Crow

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CLC Region
097110 Cambridge Bay
097210 Kugluktuk
097310 Taloyoak
097410 Gjoa Haven
097420 Kugaaruk
097510 Baker Lake
097610 Arviat
097620 Rankin Region including Whale Cove
097630 Chesterfield Inlet
097710 Hall Beach
097720 Igloolik
097740 Repulse Bay
097810 Coral Harbour
097820 Sanikiluaq
098110 Arctic Bay
098120 Pond Inlet
098130 Clyde River
098210 Qikiqtarjuaq
098220 Pangnirtung
098230 Iqaluit
098240 Kimmirut
098250 Cape Dorset
099110 Resolute
099210 Grise Fjord

United States

In the U.S., the National Weather Service uses zone forecasts, where generally each county is a zone. For counties near the ocean, there are normally two zones: coastal and inland. The same is true for counties that are part mountainous and part lowland, or for counties that are quite long. This older system is not used for warnings, which are based on FIPS codes (two digits for the state, three for the county or independent city), with the initial digit being for optional sub-county divisions. Both of these are becoming less important with the advent of point forecasts, and polygonal warning boxes based on lines drawn between geographic coordinate points. The coordinates of such points are listed at the end of each warning.

The term county warning area is also used to indicate the area of responsibility for each NWS forecast office. The forecast area is usually synonymous with the broadcast range of all NOAA Weather Radio stations programmed from any particular office, though the broadcast callsign followed by "listening area" is often used.

References

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