Forecast region

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. On the water, CLCs are assigned using the format 00aaab, where aaa refers to the forecast region, and b, if nonzero, refers to a sub-region. CLCs are also assigned to the areas of international waters for which Canada issues maritime navigation and weather warnings.

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.

CLCRegionSub-regions
031100Gatineau
031200Waskaganish
031300Matagami
031400Abitibi
031500Temiscamingue
031600Réserve Faunique La Verendrye
031700Pontiac
031800Mont-Laurier
031900Upper Gatineau-Lièvre-Papineau
032100Parc du Mont-Tremblant - Saint-Michel-des-Saints
032200Laurentides
032300Lachute-Saint-Jérôme
032400Montréal Metropolitain - Laval
032500Vaudreuil - Soulanges - Huntingdon
032600Lanaudière
032700Mauricie
032800Québec
033100James-Bay and La-Grande-Rivière
033200LG-Quatre - Laforge and Fontanges
033300Schefferville
033400Fermont
034100Chibougamau
034200Parent-Réservoir Gouin
034300Lac-Saint-Jean
034400La Tuque
034500Rivière Manicouagan
034600Les Escoumins-Forestville
034700Saguenay
034800Charlevoix
034900Réserve Faunique des Laurentides
035100Rimouski - Mont-Joli
035200Matane
035300Amqui-Vallée de la Matapedia
035400Sainte-Anne-des-Monts - Grande-Vallée
035500Parc National de la Gaspésie - Murdochville
035600Restigouche-Bonaventure
035700New-Carlisle - Chandler
035800Parc National Forillon - Gaspé - Perce
036100Baie-Comeau
036200Sept-Îles - Port-Cartier
036300Minganie
036400Natashquan
036500Chevery
036600Blanc-Sablon
036700Anticosti
036800Îles-de-la-Madeleine
037100Vallée du Richelieu-Saint-Hyacinthe
037200Drummondville - Bois-Francs
037300Eastern Townships
037400Beauce
037500Montmagny - L'Islet
037600Kamouraska - Rivière-du-Loup - Trois-Pistoles
037700Témiscouata
038100Ivujivik
038200Akulivik
038300Puvirnituq
038400Inukjuak
038500Umiujaq
038600Kuujjuarapik
039100Salluit - Raglan Lake
039200Kangiqsujuaq
039300Quaqtaq
039400Kangirsuk
039500Aupaluk
039600Tasiujaq
039700Kuujjuaq
039800Kangiqsualujjuaq
CLCRegionSub-regions
041100Simcoe - Delhi - Norfolk
041200Dunnville - Caledonia - Haldimand
041300Sarnia - Lambton
041400Windsor - Essex - Chatham-Kent
041500London - Middlesex
041600Elgin
041700Oxford - Brant
042100Attawapiskat
042200Fort Severn
042300Peawanuck
042400Big Trout Lake - Sachigo Lake
042500Sandy Lake - Pikangikum
042600Pickle Lake - Wunnummin Lake
042700Fort Hope - Webequie
043100City of Toronto
043200York - Durham
043300Belleville - Quinte - Northumberland
043400Stirling - Tweed - South Frontenac
043500Kingston - Prince Edward
043600Brockville - Leeds and Grenville
043700Cornwall - Morrisburg
044100Barrie - Orillia - Midland
044200Burk's Falls - Bayfield Inlet
044300Algonquin
044400Parry Sound - Muskoka
044500Haliburton
044600Bancroft - Bon Echo Park
044700Peterborough - Kawartha Lakes
045100Prescott and Russell
045200Renfrew - Pembroke - Barry's Bay
045300Smiths Falls - Lanark - Sharbot Lake
045400City of Ottawa
046100City of Hamilton
046200Grey - Bruce
046300Huron - Perth
046400Waterloo - Wellington
046500Dufferin - Innisfil
046600Halton - Peel
046700Niagara
047100Red Lake - Ear Falls
047200Sioux Lookout - Savant Lake
047300Kenora - Nestor Falls
047400Dryden - Ignace
047500Fort Frances - Rainy Lake
048100City of Thunder Bay
048200Lake Nipigon - Wabakimi
048300Geraldton - Manitouwadge - Hornepayne
048400Atikokan - Upsala - Quetico
048500Superior West
048600Nipigon - Marathon - Superior North
048700Wawa - White River - Pukaskwa
048800Sault Ste. Marie - Superior East
049100Greater Sudbury and vicinity
049200Elliot Lake - Ranger Lake
049300Moosonee - Fort Albany
049400Kapuskasing - Hearst
049500Timmins - Cochrane
049600Chapleau - Gogama
049700Kirkland Lake - New Liskeard - Temagami
049800North Bay - West Nipissing
049900Manitoulin - Northshore - Killarney
CLCRegionSub-regions
051100Virden - Souris
051200Brandon - Carberry - Treherne
051300Melita - Boissevain - Turtle Mountain Provincial Park
051400Killarney - Pilot Mound - Manitou
052100City of Winnipeg
052200Selkirk - Gimli - Stonewall - Woodlands - Eriksdale
052300Portage la Prairie - Headingley - Brunkild - Carman
052400Dugald - Beauséjour - Grand Beach
052500Morden - Winkler - Altona - Emerson - Morris
052600Steinbach - St. Adolphe - Dominion City - Vita - Richer
053100Bissett - Nopiming Provincial Park - Pine Falls
053200Whiteshell - Lac Du Bonnet - Pinawa
053300Sprague - Northwest Angle Provincial Forest
054100Grand Rapids
054200Arborg - Hecla - Fisher River - Gypsumville - Ashern
055100Dauphin - Roblin - Winnipegosis
055200Minnedosa - Neepawa - Russell - Riding Mountain National Park
055300Ste. Rose - McCreary - Alonsa - Gladstone
056100The Pas - Wanless - Westray - Clearwater Lake Provincial Park
056200Swan River - Duck Mountain Provincial Park - Porcupine Provincial Forest
057100Norway House - Cross Lake - Wabowden
057200Poplar River
057300Berens River - Little Grand Rapids - Bloodvein - Atikaki
058100Brochet
058200Tadoule Lake
058300Lynn Lake - Leaf Rapids - Pukatawagan
058400Thompson - Nelson House - Split Lake
058500Flin Flon - Cranberry Portage - Snow Lake
059100Churchill
059200York
059300Gillam
059400Shamattawa
059500Island Lake - Oxford House - Gods Lake
CLCRegionSub-regions
061100Leader - Gull Lake
061200Swift Current - Herbert - Cabri - Kyle - Lucky Lake
061300Shaunavon - Maple Creek - Val Marie - Cypress Hills
062100City of Regina
062200Moose Jaw - Pense - Central Butte - Craik
062300Fort Qu'Appelle - Indian Head - Lumsden - Pilot Butte
062400Assiniboia - Gravelbourg - Coronach
062500Estevan - Weyburn - Radville - Milestone
063100Yorkton - Melville - Esterhazy
063200Moosomin - Grenfell - Kipling - Wawota
063300Carlyle - Oxbow - Carnduff - Bienfait - Stoughton
064100Hudson Bay - Porcupine Plain
064200Kamsack - Canora - Preeceville
065100City of Saskatoon
065200Prince Albert - Shellbrook - Spiritwood - Duck Lake
065300Melfort - Tisdale - Nipawin - Carrot River
065400Martensville - Warman - Rosthern - Delisle - Wakaw
065500Outlook - Watrous - Hanley - Imperial - Dinsmore
065600Humboldt - Wynyard - Wadena - Lanigan - Foam Lake
066100Meadow Lake - Big River - Green Lake - Pierceland
066200The Battlefords - Unity - Maidstone - St. Walburg
066300Kindersley - Rosetown - Biggar - Wilkie - Macklin
066400City of Lloydminster - SK
067100Île à la Crosse - Buffalo Narrows - Beauval
067200La Ronge - Prince Albert National Park - Narrow Hills Provincial Park
067300Pelican Narrows - Cumberland House - Creighton
068100Uranium City - Camsell Portage
068200Fond du Lac - Stony Rapids
068300La Loche - Clearwater River Provincial Park - Cluff Lake
068400Cree Lake - Key Lake
068500Wollaston Lake - Collins Bay
068600Southend - Brabant Lake - Kinoosao
CLCRegionSub-regions
071100Jasper National Park
071200Nordegg - Forestry Trunk Road Highway 734
071300Rocky Mountain House - Caroline
071400Banff National Park
071500Kananaskis - Canmore
072100Red Deer - Ponoka - Innisfail - Stettler
072200Airdrie - Cochrane - Olds - Sundre
072300Drumheller - Three Hills
072400City of Calgary
072500Okotoks - High River - Claresholm
072600Brooks - Strathmore - Vulcan
073100Crowsnest Pass - Pincher Creek - Waterton Park
073200Cardston - Fort MacLeod - Magrath
073300Lethbridge - Taber - Milk River
074100Hanna - Coronation - Oyen
074200Medicine Hat - Bow Island - Suffield
074300Cypress Hills Provincial Park - Foremost
075100Bonnyville - St. Paul - Cold Lake - Lac La Biche
075200Lloydminster - Wainwright - Vermilion - Provost
076100Westlock - Barrhead - Athabasca
076200Spruce Grove - Morinville - Mayerthorpe - Evansburg
076300Fort Saskatchewan - Vegreville - Redwater - Smoky Lake
076400City of Edmonton - St. Albert - Sherwood Park
076500Drayton Valley - Devon - Rimbey - Pigeon Lake
076600Leduc - Camrose - Wetaskiwin - Tofield
077100Grande Prairie - Beaverlodge - Valleyview
077200Hinton - Grande Cache
077300Slave Lake
077400Whitecourt - Edson - Fox Creek - Swan Hills
078100High Level - Rainbow Lake - Fort Vermilion - Mackenzie Highway
078200Peace River - Fairview - High Prairie - Manning
078300Wabasca - Peerless Lake - Gift Lake - Cadotte Lake
079100Fort Chipewyan - Wood Buffalo National Park
079200Fort McMurray - Fort MacKay
CLCRegionSub-regions
081100Haida Gwaii
081200North Vancouver Island
081300East Vancouver Island
081400West Vancouver Island
081500Inland Vancouver Island
081600Greater Victoria
082100Central Coast - Coastal sections
082200Central Coast - Inland sections
082300Sunshine Coast
082400Whistler
082500Howe Sound
082600Metro Vancouver
082700Fraser Valley
082800Southern Gulf Islands
083100Fraser Canyon
083200South Thompson
083300Nicola
083400Similkameen
083500Okanagan Valley
083600Shuswap
084100Arrow and Slocan Lakes
084200Boundary
084300West Kootenay
084400Kootenay Lake
084500East Kootenay
084600Elk Valley
085100North Thompson
085200North Columbia
085300Kinbasket
085400West Columbia
085500East Columbia
085600Yoho and Kootenay Parks
086100Chilcotin
086200Cariboo
086300100 Mile
086400Yellowhead
087100Bulkley Valley and the Lakes District
087200Williston
087300BC Peace River
087410Stuart - Nechako
087420Prince George
087500McGregor
088100Fort Nelson
088200Muncho Lake and Stone Mountain Provincial Parks
088300Watson Lake - BC
089100North Coast - Coastal sections
089200North Coast - Inland sections
089300Dease Lake
089400Cassiar Mountains - BC
089500Teslin - BC
089600Atlin
089700South Klondike Highway - Carcross to White Pass
089800Haines Road - Haines Junction to Pleasant Camp

List of marine forecast regions

If viewing this page online, each marine forecast region entry is linked to a page on the MSC's website with the marine forecast and any warnings in effect for that region.

Pacific Waters
CLCRegionSub-regions
001110Juan de Fuca Strait
001120Haro StraitNone
001130Strait of Georgia
001140Howe SoundNone
001150Johnstone StraitNone
001160Queen Charlotte StraitNone
001170West Coast Vancouver Island NorthNone
001180West Coast Vancouver Island SouthNone
001210Queen Charlotte Sound
001220Central Coast from McInnes Island to Pine IslandNone
001230Douglas ChannelNone
001240Hecate Strait
001250Dixon Entrance EastNone
001260Dixon Entrance West
001270West Coast Haida Gwaii
001310Bowie
001320Explorer
Great Lakes
CLCRegionSub-regions
002210Lake Erie
002310Lake St. ClairNone
002410Lake Huron (Main basin)
002510Georgian Bay
002610North ChannelNone
002710Whitefish BayNone
002810Lake Superior
002910Lake Ontario
Atlantic Waters
CLCRegionSub-regions
003110Tadoussac to Pointe-des-Monts
003120Pointe-des-Monts to Anticosti
003140Waters surrounding Anticosti Island
003150Chaleur-Miscou
003160Waters surrounding Magdalen Islands
003170Northumberland Strait
003210Bay of FundyNone
003220Grand MananNone
003230Lurcher
003240Browns Bank
003250Georges Bank
003260Southwestern Shore of Nova Scotia
003270LaHave Bank
003280West Scotian Slope
003290Halifax Harbour and ApproachesNone
003310Cabot Strait
003320Fourchu
003330Eastern Shore of Nova Scotia
003330Sable
003350East Scotian Slope
003360Southwest Coast of Newfoundland
003370Banquereau
003380Laurentian Fan
003410Strait of Belle Isle
003420Northeast Gulf of St. Lawrence
003430Gulf - Port au Port
003440Northeast Coast of Newfoundland
003450East Coast of Newfoundland
003460South Coast of Newfoundland
003470Southwestern Grand Banks
003510South Labrador Coast
003520Belle Isle Bank
003530Funk Island Bank
003540Northern Grand Banks
003550Southeastern Grand Banks
003610North Labrador Coast
003620Mid-Labrador Coast
003630Northwest Labrador Sea
003640South Labrador Sea
003650East Labrador Sea
St. Lawrence River and eastern inland waters
CLCRegionSub-regions
004110Lake MelvilleNone
004210Bras d'Or LakesNone
004310Saguenay RiverNone
004320Lac Saint-JeanNone
004410L'Isle-aux-Coudres to TadoussacNone
004420Donnacona to L'Isle-aux-Coudres
004430Trois-Rivières to DonnaconaNone
004440Montréal to Trois-RivièresNone
004450Cornwall to MontréalNone
004461Prescott to CornwallNone
004471Kingston to PrescottNone
004510North Lake MemphremagogNone
004610Richelieu River and North Lake ChamplainNone
004710Lake SimcoeNone
004720Lake NipissingNone
004810Lake NipigonNone
004820Lake of the WoodsNone
Hudson Bay and Baffin Island Waters
CLCRegionSub-regions
005110Prince CharlesNone
005120East FoxeNone
005130West FoxeNone
005140Igloolik
005210Nottingham
005220Resolution (Central Hudson Strait)
005230Ungava
005310Puvirnituq
005320Belcher
005330James Bay
005410South central Hudson Bay
005420South Hudson Bay
005430York
005510Arviat
005520Churchill
005530Central Hudson Bay
005540Coats
005610Roes Welcome
005620Rankin
Northeastern Arctic Waters
CLCRegionSub-regions
006110Robeson
006120Kane
006130Clarence
006140East Baffin (North of 72°N)
006150East Clyde
006160West Clyde
006170West Baffin (North of 72°N)
006180PondNone
006210East Davis
006220East Brevoort
006230Central Brevoort
006240West Brevoort
006250Frobisher BayNone
006260Cumberland SoundNone
006270West Davis
006310Lancaster
006320Navy BoardNone
006330AdmiraltyNone
006340CommitteeNone
006350BoothiaNone
006360Regent
006410Barrow
006420Peel
006430St. Roch
006440MaudNone
006450LarsenNone
006460McClintockNone
006510DeaseNone
006520BathurstNone
006530CoronationNone
006540DolphinNone
006550Amundsen
006560HolmanNone
006570Prince of WalesNone
006610Rae (between Barrow and Melville)None
006620MelvilleNone
006630McClureNone
006640LiddonNone
006650FitzwilliamNone
006660GriperNone
006670BallantyneNone
006680WilkinsNone
006710PearyNone
006720HasselNone
006730MacLeanNone
006740QueensNone
006750ByamNone
006760HazenNone
006770GustafNone
006810GreelyNone
006820Eureka
006830Jones
006840NorwegianNone
006850MasseyNone
006860South SverdrupNone
006870North SverdrupNone
006880NansenNone
Western Arctic Waters
CLCRegionSub-regions
00711088.5°N to North Pole (CZ1)None
00712087~88.5°N, 35~80°W (CY3)None
00713085~87°N, 35~60°W (CX5)None
00714085~87°N, 60~90°W (CX4)None
00715085~87°N, 90~120°W (CX3)None
00716085~87°N, 120~141°W (CX2)None
00717085~87°N, 141~169°W (CX1, NAVAREA XVII)None
00718087~88.5°N, 120~169°W (CY1, NAVAREA XVII)None
00719087~88.5°N, 80~120°W (CY2)None
007210International waters south of 85°N, 35~60°W (CW6, NAVAREA XVIII)None
007220North Greenland coast, 35~55°W (CV7, NAVAREA XVIII)None
007230Robeson Channel entrance to Lincoln Sea (CV6)None
00731084~85°N, 60~80°W (CW5)None
007320AlertNone
007330Bartlett (James Ross Bay to Cape Columbia)None
007340Ward HuntNone
007350Ellesmere (West of Ward Hunt to 90°W)None
007360South Axel HeibergNone
007370Axel HeibergNone
00738083~85°N, 80~100°W, except where part of Ellesmere area (CW4)None
007410Prince PatrickNone
007420BrockNone
007430South Prince PatrickNone
00744075~76.5°N, 130~141°W (CT4)None
00745076.5~78°N, 130~141°W (CU4)None
00746078~79.5°N, 130~141°W (CU3)None
00751082~85°N, 100~120°W (CW3)None
00752079.5~82°N, 110~120°W (CV5)None
007530Ellef RingnesNone
007540South Ellef RingnesNone
007550BordenNone
007560North Prince PatrickNone
00757079.5~82°N, 120~130°W (CV4)None
00758079.5~82°N, 130~141°W (CV3)None
00759082~85°N, 120~141°W (CW2)None
00761082~85°N, 141~169°W (CW1, NAVAREA XVII)None
00762079.5~82°N, 141~155°W (CV2, NAVAREA XVII)None
00763076.5~79.5°N, 141~155°W (CU2, NAVAREA XVII)None
007640International waters south of 76.5°N, 141~151.5°W (CT3, NAVAREA XVII)None
007650International waters south of 76.5°N, 151.5~160°W (CT2, NAVAREA XVII)None
007660International waters south of 76.5°N, 160~169°W (CT1, NAVAREA XVII)None
00767076.5~79.5°N, 155~169°W (CU1, NAVAREA XVII)None
00768079.5~82°N, 155~169°W (CV1, NAVAREA XVII)None
007710Prince AlfredNone
007720BanksNone
007730Baillie
007810West Prince AlfredNone
007820North TuktoyaktukNone
007830Tuktoyaktuk
007840Yukon CoastNone
007850MacKenzieNone
007860North MacKenzieNone
007870Northwest BeaufortNone
Western inland waters

[3]

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

  1. "SAME - Weatheradio - Public Alert messages". Meteorological Service of Canada. 15 Jan 2008. Archived from the original on May 1, 2006. Retrieved 22 July 2009.
  2. "Find a Transmitter & CLC Codes". Meteorological Service of Canada. 7 July 2016. Retrieved 24 July 2016.
  3. MSC Forecast Location Polygon Package version 6.2.0. Meteorological Service of Canada. Retrieved 12 November 2019.
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