MANAIR Manual of Standards and Procedures for Aviation Forecasts: appendix D


D.1 Canadian SIGMET information domain

Map.  See long description below.

Description of image

Illustration of seven Canadian domestic flight information regions as well as the Gander Oceanic flight information region and the control area. They include: CZEG Edmonton, CZVR Vancouver, CZWG Winnipeg, CZUL Montreal, CZYZ Toronto, CZQM Moncton, CZQX Gander domestic, CZQX Gander oceanic.

The summation of all flight information regions represents Canada’s area of responsibility (domain) for the provision of SIGMET information.

D.2 Abbreviations and decode used in SIGMET

Code Description
APRX Approximate
AT At (followed by time)
CB Cumulonimbus
CLD Cloud
CNCL Cancel
DS Dust storm
E East or eastern longitude
ENE East-north-east
ESE East-south-east
+FC Tornado/Waterspout
FCST Forecast
FIR Flight information region
FL Flight level
FRQ Frequent
FZRA Freezing rain
GFA Graphic area forecast
GR Hail
HVY Heavy
ICG Icing
INTSFYG Intensifying
INTSTY Intensity
KT Knots
LLWS Low level wind shear
MOV Move
MTW Mountain waves
N North or Northern latitude
NC No change
NE North-east
NM Nautical miles
Code Description
NNE North-north-east
NNW North-north-west
NW North-west
OBS Observed
PSBL Possible
PSN Position
QS Quasi-Stationary
RDOACT Radioactive
RMK Remark
S South or Southern latitude
SE South-east
SEV Severe Surface
SFC Surface
SIGMET Refer to 5.1 of chapter 5
SQLN Squall line
SS Sand storm
SSE South-south-east
SSW South-south-west
SW South-west
TC Tropical cyclone
TS Thunderstorm
TURB Turbulence
VA Volcanic ash
W West or western longitude
WKNG Weakening
WNW West-north-west
WSW West-south-west
WTN Within
Z Coordinated universal time

D.3 SIGMET Bulletin scheme

FIR indicator FIR name Type International (ICAO) National
CZVR Vancouver SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN01 CWAO
WCCN01 CWAO
WVCN01 CWAO
WSCN21 CWAO
WCCN21 CWAO
WVCN21 CWAO
CZEG Edmonton SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN02 CWAO
WCCN02 CWAO
WVCN02 CWAO
WSCN22 CWAO
WCCN22 CWAO
WVCN22 CWAO
CZWG Winnipeg SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN03 CWAO
WCCN03 CWAO
WVCN03 CWAO
WSCN23 CWAO
WCCN23 CWAO
WVCN23 CWAO
CZYZ Toronto SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN04 CWAO
WCCN04 CWAO
WVCN04 CWAO
WSCN24 CWAO
WCCN24 CWAO
WVCN24 CWAO
CZUL Montréal SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN05 CWAO
WCCN05 CWAO
WVCN05 CWAO
WSCN25 CWAO
WCCN25 CWAO
WVCN25 CWAO
CZQM Moncton SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN06 CWAO
WCCN06 CWAO
WVCN06 CWAO
WSCN26 CWAO
WCCN26 CWAO
WVCN26 CWAO
CZQX Gander Domestic SIGMET
SIGMET (TC)
SIGMET (VA)
WSCN07 CWAO
WCCN07 CWAO
WVCN07 CWAO
WSCN27 CWAO
WCCN27 CWAO
WVCN27 CWAO
CZQX Gander Oceanic SIGMET
SIGMET (TC)
SIGMET (VA)
WSNT01 CWAO
WCNT01 CWAO
WVNT01 CWAO
WSNT21 CWAO
WCNT21 CWAO
WVNT21 CWAO

D.4 Alphanumeric sequence

Rules for the use of letters:

  • 25 letters of the alphabet will be shared by all 8 FIR (T is exclusively used for test SIGMET messages - refer 5.8.9).
  • Use a letter if not currently in service in any FIR and if it was retired for a minimum of 24 hours otherwise the next letter is used. Letter Z wraps back to letter A if necessary.
  • If all letters are unavailable according to the above rules, then reuse the letter that has had the longest retirement.
  • The letter attributed to a SIGMET message will not change during its lifespan (updates and cancellation).
  • WS, WV and WC, messages share the same alphabet. If letter A is used in a WS, then a subsequent WV would have to use letter B.
  • WS, WV and WC, messages do not share the alphabet with WA (AIRMET). Letter A may be used simultaneously in both a WS and a WA.

D.5 Meteorological phenomena to be included in SIGMET

Thunderstorm

frequent FRQ2 TS
frequent, with hail FRQ2 TSGR4
frequent, with hail and possible tornado/waterspout FRQ2 TSGR4 PSBL +FC5
frequent, with hail and tornado/waterspout FRQ2 TSGR4 +FC5
squall line SQLN3 TS
squall line, with hail SQLN3 TSGR4
squall line, with hail and possible tornado/waterspout SQLN3 TSGR4 PSBL +FC5
squall line, with hail and tornado/waterspout SQLN3 TSGR4 +FC5

Turbulence

severe turbulence SEV TURB6

Icing

severe icing SEV ICG7
severe icing due to freezing rain SEV ICG (FZRA)7

Mountain wave

severe mountain wave SEV MTW

Low-level wind shear

low-level wind shear LLWS

Dust storm

heavy dust storm HVY DS

Sand storm

heavy sand storm HVY SS

Radioactive cloud

Radioactive cloud RDOACT CLD

Volcanic ash

volcanic ash VA

Tropical cyclone

tropical cyclone with 10-minute mean surface wind speed of 63 km/h (34 KT) or more TC

Note (1): Only one of the weather phenomena listed shall be selected and included in each SIGMET.

Note (2): Frequent (FRQ) indicates an area of thunderstorms within which there is little or no separation between adjacent thunderstorms with a maximum spatial coverage greater than 50% of the area affected, or forecast to be affected, by the phenomenon (at a fixed time or during the period of validity).

Note (3): Squall line (SQLN) indicates thunderstorms along a line with little or no space between individual clouds.

Note (4): Hail (GR) should be used as a further description of the thunderstorm, as necessary.

Note (5): Tornado and/or waterspout (+FC) should be used as a further description of the thunderstorm, as necessary.

Note (6): Severe (SEV) turbulence (TURB) refers only to:

  • low-level turbulence associated with strong surface winds
  • rotor streaming
  • turbulence whether in cloud or not in cloud (CAT)

Turbulence shall not be used in connection with convective clouds.

Note (7): Severe (SEV) icing (ICG) shall refer to icing in other than convective clouds. Freezing rain (FZRA) shall refer to severe icing conditions caused by freezing rain.

D.6 Resolution

Distance

  • Every 5 NM from 10 to 30 NM (5, 10, 15, 20, 25, 30)
  • Every 15 NM from 30 to 90 NM (30, 45, 60, 75, 90)
  • Every 30 NM above 90 NM (90, 120, 150, 180, 210, etc.)

Direction 8 point compass (octants*)

Octants (degrees true):

  • N: directions greater than 337.5 degrees to 22.5 degrees
  • NE: directions greater than 22.5 degrees to 67.5 degrees
  • E: directions greater than 67.5 degrees to 112.5 degrees
  • SE: directions greater than 112.5 degrees to 157.5 degrees
  • S: directions greater than 157.5 degrees to 202.5 degrees
  • SW: directions greater than 202.5 degrees to 247.5 degrees
  • W: directions greater than 247.5 degrees to 292.5 degrees
  • NW: directions greater than 292.5 degrees to 337.5 degrees

Latitude and longitude (all FIRs except Gander Oceanic)

  • Degrees and minutes (1 minute)

Latitude and longitude (Gander Oceanic FIR)

  • Degrees and minutes (15 minutes)1

Level (FL)

  • 100 feet - up to 1,500 feet
  • 500 feet - 1500 to 3,000 feet
  • 1,000 feet - above 3,000 feet

Movement (direction/speed) 16 point compass (radials*)/ 5 KT increments

Radials (degrees true):

  • N: 360 degrees
  • NNE: 22.5 degrees
  • NE: 45 degrees
  • ENE: 67.5 degrees
  • E: 90 degrees
  • ESE: 112.5 degrees
  • SE: 135 degrees
  • SSE: 157.5 degrees
  • S: 180 degrees
  • SSW: 202.5 degrees
  • SW: 225 degrees
  • WSW: 247.5 degrees
  • W: 270 degrees
  • WNW: 292.5 degrees
  • NW: 315 degrees
  • NNW: 337.5 degrees

Note (1): U.S. National Weather Service (NWS) uses a 15 minute resolution over oceanic areas such as New York Oceanic FIR. This harmonizes the practice with our southern neighbouring FIR. UK Met Service, over Shanwick Oceanic FIR, may use up to the minute but in reality, rarely go beyond 30 minutes resolution. An exception is made for the location of a TC centre which will be stated to 1 minute resolution in order to match TCAC guidance (refer to 5.8.5).

D.7 Aviation reference sites used in National SIGMET

Id Name Province FIR GFA Coordinates
Latitude
(degrees - minutes - seconds)
Coordinates
Longitude
(degrees - minutes - seconds)
CYXX Abbotsford BC CZVR 31 N49 01 31 W122 21 36
CYXC Cranbrook/Canadian Rockies Intl BC CZVR 31 N49 36 44 W115 46 55
CYKA Kamloops BC CZVR 31 N50 42 09 W120 26 55
CYLW Kelowna BC CZVR 31 N49 57 26 W119 22 40
CYYF Penticton BC CZVR 31 N49 27 45 W119 36 08
CYZT Port Hardy BC CZVR 31 N50 40 50 W127 22 00
CYXS Prince George BC CZVR 31 N53 53 03 W122 40 39
CYPR Prince Rupert BC CZVR 31 N54 17 09 W130 26 41
CYZP Sandspit BC CZVR 31 N53 15 15 W131 48 50
CYXT Terrace BC CZVR 31 N54 28 07 W128 34 42
CYVR Vancouver Intl BC CZVR 31 N49 11 41 W123 11 02
CYYJ Victoria Intl BC CZVR 31 N48 38 50 W123 25 33
CYWL Williams Lake BC CZVR 31 N52 11 00 W122 03 16
CBBC Bella Bella (Campbell Island) BC CZVR 31 N52 11 06 W128 09 24
CYBL Campbell River BC CZVR 31 N49 57 02 W125 16 15
CYCG Castlegar/West Kootenay Regional BC CZVR 31 N49 17 47 W117 37 57
CYZY MacKenzie BC CZVR 31 N55 17 58 W123 08 00
CZMT Masset BC CZVR 31 N54 01 38 W132 07 30
CYCD Nanaimo BC CZVR 31 N49 03 16 W123 52 12
CYQZ Quesnel BC CZVR 31 N53 01 34 W122 30 37
CYYD Smithers BC CZVR 31 N54 49 31 W127 10 58
CYAZ Tofino/Long Beach BC CZVR 31 N49 04 56 W125 46 21
CYQQ Comox BC CZVR 31 N49 42 39 W124 53 12
CZST Stewart BC CZVR 31 N55 56 00 W129 59 00
CAV4 McBride/Charlie Leake Field BC CZVR 31 N53 18 54 W120 10 14
CYCP Blue River BC CZVR 31 N52 07 00 W119 17 00
CYRV Revelstoke BC CZVR 31 N50 57 44 W118 11 04
CYPZ Burns Lake BC CZVR 31 N54 22 35 W125 57 05
CYPS Pemberton BC CZVR 31 N50 18 09 W122 44 16
CBT3 Tsetzi Lake (Pan Phillips) BC CZVR 31 N52 58 19 W125 01 36
CAG3 Chilko Lake (Tsylos Park Lodge) BC CZVR 31 N51 37 34 W124 08 31
CYYE Fort Nelson BC CZEG 31 N58 50 11 W122 35 49
CYXJ Fort St. John BC CZEG 31 N56 14 17 W120 44 25
CYYC Calgary Intl AB CZEG 32 N51 07 21 W114 00 48
CYEG Edmonton Intl AB CZEG 32 N53 18 35 W113 34 47
CYMM Fort McMurray AB CZEG 32 N56 39 12 W111 13 24
CYQU Grande Prairie AB CZEG 32 N55 10 47 W118 53 06
CYOJ High Level AB CZEG 32 N58 37 17 W117 09 53
CYQL Lethbridge County AB CZEG 32 N49 37 49 W112 47 59
CYLL Lloydminster AB CZEG 32 N53 18 33 W110 04 21
CYXH Medicine Hat AB CZEG 32 N50 01 08 W110 43 15
CYPE Peace River AB CZEG 32 N56 13 37 W117 26 50
CYQF Red Deer Regional AB CZEG 32 N52 10 56 W113 53 40
CYDB Burwash YT CZEG 35 N61 22 14 W139 02 24
CYCB Cambridge Bay NU CZEG 35 N69 06 29 W105 08 14
CYFS Fort Simpson NT CZEG 35 N61 45 37 W121 14 11
CYSM Fort Smith NT CZEG 35 N60 01 13 W111 57 43
CYHY Hay River/Merlyn Carter Airport NT CZEG 35 N60 50 23 W115 46 58
CYEV Inuvik (Mike Zubko) NT CZEG 35 N68 18 14 W133 28 59
CYCO Kugluktuk NU CZEG 35 N67 49 00 W115 08 38
CYMA Mayo YT CZEG 35 N63 36 59 W135 52 06
CYVQ Norman Wells NT CZEG 35 N65 16 53 W126 47 55
CYQH Watson Lake YT CZEG 35 N60 06 59 W128 49 21
CYXY Whitehorse/Erik Nielsen Intl. YT CZEG 35 N60 42 34 W135 04 02
CYZF Yellowknife NT CZEG 35 N62 27 46 W114 26 25
CYEK Arviat NU CZEG 36 N61 05 38 W094 04 18
CYBK Baker Lake NU CZEG 36 N64 17 56 W096 04 40
CYTE Cape Dorset NU CZEG 36 N64 13 49 W076 31 30
CYCY Clyde River NU CZEG 36 N70 29 09 W068 31 01
CYZS Coral Harbour NU CZEG 36 N64 11 36 W083 21 34
CYUX Hall Beach NU CZEG 36 N68 46 33 W081 14 33
CYIO Pond Inlet NU CZEG 36 N72 41 22 W077 58 08
CYVM Qikiqtarjuaq NU CZEG 36 N67 32 48 W064 01 54
CYRT Rankin Inlet NU CZEG 36 N62 48 38 W092 06 53
CYYH Taloyoak NU CZEG 36 N69 32 48 W093 34 37
CYHK Gjoa Haven NU CZEG 36 N68 38 08 W095 51 01
CYRB Resolute Bay NU CZEG 37 N74 43 01 W094 58 10
CYDQ Dawson Creek BC CZEG 31 N55 44 32 W120 10 59
CYDL Dease Lake BC CZEG 31 N58 25 20 W130 01 56
CYVT Buffalo Narrows SK CZEG 32 N55 50 31 W108 25 03
CYPY Fort Chipewyan AB CZEG 32 N58 46 02 W111 07 02
CYZH Slave Lake AB CZEG 32 N55 17 35 W114 46 38
CYSF Stony Rapids SK CZEG 32 N59 15 01 W105 50 29
CYZU Whitecourt AB CZEG 32 N54 08 38 W115 47 12
CYDA Dawson City YT CZEG 35 N64 02 32 W139 07 49
CYWJ Déline NT CZEG 35 N65 12 40 W123 26 11
CZFA Faro YT CZEG 35 N62 12 25 W133 22 24
CYGH Fort Good Hope NT CZEG 35 N66 14 26 W128 38 45
CZFM Fort McPherson NT CZEG 35 N67 24 25 W134 51 35
CYRA Gamèti/Rae Lakes NT CZEG 35 N64 06 58 W117 18 35
CYLK Lutselk'e NT CZEG 35 N62 25 06 W110 40 56
CYOA Ekati NT CZEG 35 N64 41 56 W110 36 53
CYOC Old Crow YT CZEG 35 N67 34 12 W139 50 24
CYPC Paulatuk (Nora Aliqatchialuk Ruben) NT CZEG 35 N69 21 38 W124 04 33
CYSY Sachs Harbour (David Nasogaluak JR. Saaryuaq) NT CZEG 35 N71 59 37 W125 14 29
CYZW Teslin YT CZEG 35 N60 10 23 W132 44 30
CYUB Tuktoyaktuk/James Gruben NT CZEG 35 N69 26 00 W133 01 35
CYHI Ulukhaktok/Holman NT CZEG 35 N70 45 46 W117 48 22
CYGT Igloolik NU CZEG 36 N69 21 53 W081 48 59
CYBB Kugaaruk NU CZEG 36 N68 32 09 W089 48 19
CYXP Pangnirtung NU CZEG 36 N66 08 42 W065 42 49
CYUT Repulse Bay NU CZEG 36 N66 31 14 W086 13 29
CYEU Eureka NU CZEG 37 N79 59 40 W085 48 43
CYAB Arctic Bay NU CZEG 37 N73 00 23 W085 02 50
CYLT Alert NU CZEG 37 N82 31 04 W062 16 50
CYOD Cold Lake/Group Captain R.W. McNair AB CZEG 32 N54 24 18 W110 16 46
CYCS Chesterfield Inlet NU CZEG 36 N63 20 50 W090 43 52
CMR2 Mary River NU CZEG 36 N71 19 27 W079 21 25
CYGZ Grise Fiord NU CZEG 37 N76 25 33 W082 54 29
CJQ6 Tanquary Fiord NU CZEG 37 N81 24 34 W076 52 54
CDL7 Doris Lake NU CZEG 35 N68 07 31 W106 35 07
CYVL Colville Lake/Tommy Kochon NT CZEG 35 N67 01 16 W126 07 43
CFF4 Great Bear Lake NT CZEG 35 N66 42 11 W119 43 02
CYXQ Beaver Creek YT CZEG 35 N62 24 37 W140 52 08
CMN4 Minto YT CZEG 35 N62 36 17 W137 13 19
CFC4 MacMillan Pass YT CZEG 35 N63 10 52 W130 12 07
CYWY Wrigley NT CZEG 35 N63 12 35 W123 26 12
CYWE Wekweèti NT CZEG 35 N64 11 27 W114 04 36
CBX5 Tungsten (Cantung) NT CZEG 35 N61 57 25 W128 12 10
CBH4 Prairie Creek NT CZEG 35 N61 33 53 W124 48 54
CKV4 Obre Lake - North of sixty NT CZEG 35 N60 18 56 W103 07 54
CFT3 Finlayson Lake YT CZEG 35 N61 41 29 W130 46 26
CYJP Fort Providence NT CZEG 35 N61 19 09 W117 36 22
CYFR Fort Resolution NT CZEG 35 N61 10 51 W113 41 23
CYJF Fort Liard NT CZEG 31 N60 14 08 W123 28 12
CBS4 Mule Creek BC CZEG 31 N59 47 08 W136 34 59
CYSQ Atlin BC CZEG 31 N59 34 36 W133 40 08
CBA9 Ospika BC CZEG 31 N56 16 15 W124 03 50
CBQ7 Kemess Creek BC CZEG 31 N56 58 28 W126 44 28
CBX7 Tumbler Ridge BC CZEG 31 N55 01 38 W120 55 52
CGC2 Galore Creek (Heli) BC CZEG 31 N57 07 24 W131 27 09
CYJA Jasper AB CZEG 32 N52 59 48 W118 03 34
CYBA Banff AB CZEG 32 N51 12 00 W115 32 00
CYLB Lac La Biche AB CZEG 32 N54 46 13 W112 01 54
CYOP Rainbow Lake AB CZEG 32 N58 29 29 W119 24 28
CFU4 Garden River AB CZEG 32 N58 42 50 W113 52 34
CYBE Uranium City SK CZEG 32 N59 33 41 W108 28 53
CNL9 Nueltin Lake MB CZEG 32 N59 42 29 W100 07 38
CZWL Wollaston Lake SK CZEG 32 N58 06 25 W103 10 21
CYKJ Key Lake SK CZEG 32 N57 15 23 W105 37 03
CFS6 Loon River AB CZEG 32 N57 08 31 W115 04 31
CFS4 Ogilvy YT CZEG 35 N65 40 00 W138 07 00
CEL4 Hanna AB CZEG 32 N51 37 53 W111 54 15
CYBR Brandon Muni MB CZWG 32 N49 54 36 W099 57 07
CYYQ Churchill MB CZWG 32 N58 44 21 W094 03 59
CYDN Dauphin (Lt.Col WG. (Billy) Barker VC Aprt) MB CZWG 32 N51 06 03 W100 03 09
CYGX Gillam MB CZWG 32 N56 21 28 W094 42 39
CYIV Island Lake MB CZWG 32 N53 51 26 W094 39 13
CYVC La Ronge (Barber Field) SK CZWG 32 N55 09 05 W105 15 43
CYYL Lynn Lake MB CZWG 32 N56 51 50 W101 04 34
CYQW North Battleford (Cameron McIntosh) SK CZWG 32 N52 46 09 W108 14 37
CYNE Norway House MB CZWG 32 N53 57 30 W097 50 39
CYPA Prince Albert (Glassfield) SK CZWG 32 N53 12 52 W105 40 23
CYQR Regina Intl SK CZWG 32 N50 25 56 W104 39 58
CYXE Saskatoon/John G. Diefenbaker Intl SK CZWG 32 N52 10 15 W106 41 59
CYQD The Pas MB CZWG 32 N53 58 17 W101 05 28
CYTH Thompson MB CZWG 32 N55 48 17 W097 51 45
CYWG Winnipeg/James Armstrong Richardson Intl MB CZWG 32 N49 54 36 W097 14 24
CYTL Big Trout Lake ON CZWG 33 N53 49 04 W089 53 49
CYQK Kenora ON CZWG 33 N49 47 18 W094 21 47
CYHD Dryden Regional ON CZWG 33 N49 49 54 W092 44 39
CYXL Sioux Lookout ON CZWG 33 N50 06 50 W091 54 19
CYQT Thunder Bay ON CZWG 33 N48 22 19 W089 19 18
CYGQ Geraldton (Greenstone Regional) ON CZWG 33 N49 46 43 W086 56 19
CYYN Swift Current SK CZWG 32 N50 17 31 W107 41 26
CYQV Yorkton Muni SK CZWG 32 N51 15 53 W102 27 41
CYPL Pickle Lake ON CZWG 33 N51 26 47 W090 12 51
CYRL Red lake ON CZWG 33 N51 04 02 W093 47 35
CYMJ Moose Jaw/R Vice Marshal C.M. McEwen SK CZWG 32 N50 19 49 W105 33 33
CYPG Portage La Prairie/Southport MB CZWG 32 N49 54 11 W098 16 26
CYBQ Tadoule Lake MB CZWG 32 N58 42 22 W098 30 44
CKA9 Southend SK CZWG 32 N56 20 14 W103 17 36
CZTM Shamattawa MB CZWG 32 N55 51 47 W092 04 53
CYBV Berens River MB CZWG 32 N52 21 32 W097 01 05
CYHB Hudson Bay SK CZWG 32 N52 49 06 W102 18 40
CYFO Flin Flon MB CZWG 32 N54 40 41 W101 40 54
CYYO Wynyard SK CZWG 32 N51 48 33 W104 10 09
CYEN Estevan Regional SK CZWG 32 N49 12 37 W102 57 57
CYKY Kindersley Regional SK CZWG 32 N51 30 55 W109 10 50
CYLH Lansdowne House ON CZWG 33 N52 11 44 W087 56 03
CKQ3 North Spirit Lake ON CZWG 33 N52 29 24 W092 58 16
CYKP Ogoki Post ON CZWG 33 N51 39 31 W085 54 04
CYYW Armstrong ON CZWG 33 N50 17 25 W088 54 35
CYIB Atikokan Muni ON CZWG 33 N48 46 26 W091 38 19
CJV8 Grand Rapids MB CZWG 32 N53 10 21 W099 19 23
CZSN South Indian Lake MB CZWG 32 N56 47 34 W098 54 26
CYER Fort Severn ON CZWG 33 N56 01 08 W087 40 34
CYPO Peawanuck ON CZWG 33 N54 59 17 W085 26 36
CYAT Attawapiskat ON CZWG 33 N52 55 39 W082 25 55
CYLJ Meadow Lake SK CZWG 32 N54 07 31 W108 31 22
CYYU Kapuskasing ON CZYZ 33 N49 24 42 W082 28 07
CYTS Timmins/Victor M. Power ON CZYZ 33 N48 34 11 W081 22 36
CYAM Sault Ste. Marie ON CZYZ 33 N46 29 06 W084 30 35
CYSB Sudbury ON CZYZ 33 N46 37 30 W080 47 56
CYYB North Bay ON CZYZ 33 N46 21 50 W079 25 27
CYYZ Toronto/Lester B. Pearson Intl ON CYZY 33 N43 40 38 W079 37 50
CYHM Hamilton ON CZYZ 33 N43 10 25 W079 56 06
CYQG Windsor ON CYZY 33 N42 16 32 W082 57 20
CYGK Kingston ON CYZY 33 N44 13 33 W076 35 48
CYKF Kitchener/Waterloo ON CYZY 33 N43 27 39 W080 22 43
CYXU London ON CYZY 33 N43 01 59 W081 09 04
CYLD Chapleau ON CZYZ 33 N47 49 13 W083 20 49
CYXR Earlton (Timiscaming Regional) ON CZYZ 33 N47 41 42 W079 50 56
CYZE Gore Bay-Manitoulin ON CZYZ 33 N45 52 54 W082 34 02
CYSP Marathon ON CZYZ 33 N48 45 19 W086 20 40
CYMO Moosonee ON CZYZ 33 N51 17 28 W080 36 28
CYQA Muskoka ON CZYZ 33 N44 58 29 W079 18 12
CYPQ Peterborough ON CZYZ 33 N44 13 48 W078 21 48
CYSN St Catharines/Niagara District ON CZYZ 33 N43 11 30 W079 10 16
CYZR Sarnia (Chris Hadfield) ON CZYZ 33 N42 59 58 W082 18 32
CYXZ Wawa ON CZYZ 33 N47 58 01 W084 47 11
CYVV Wiarton ON CZYZ 33 N44 44 45 W081 06 26
CYWA Petawawa ON CZYZ 33 N45 57 08 W077 19 09
CYTR Trenton ON CZYZ 33 N44 07 08 W077 31 41
CYHF Hearst (René Fontaine) Muni ON CZYZ 33 N49 42 50 W083 41 13
CYGD Goderich ON CZYZ 33 N43 46 01 W081 42 38
CYVP Kuujjuaq QC CZUL 33 N58 05 46 W068 25 37
CYPH Inukjuak QC CZUL 33 N58 28 19 W078 04 37
CYGW Kuujjuarapik QC CZUL 33 N55 16 55 W077 45 55
CYGL La Grande Rivière QC CZUL 33 N53 37 31 W077 42 15
CYUY Rouyn-Noranda QC CZUL 33 N48 12 22 W078 50 08
CYVO Val-d'Or QC CZUL 33 N48 03 12 W077 46 58
CYRJ Roberval QC CZUL 33 N48 31 12 W072 15 56
CYQB Québec/Jean Lesage Intl QC CZUL 33 N46 47 28 W071 23 36
CYOW Ottawa/MacDonald-Cartier Intl ON CZUL 33 N45 19 21 W075 40 09
CYUL Montréal/Pierre Elliott Trudeau Intl QC CZUL 33 N45 28 14 W073 44 27
CYSC Sherbrooke QC CZUL 33 N45 26 19 W071 41 29
CYKL Schefferville QC CZUL 34 N54 48 19 W066 48 19
CYWK Wabush NL CZUL 34 N52 55 22 W066 51 53
CYBX Lourdes-de-Blanc-Sablon QC CZUL 34 N51 26 37 W057 11 07
CYZV Sept-Îles QC CZUL 34 N50 13 24 W066 15 56
CYGV Havre St-Pierre QC CZUL 34 N50 16 55 W063 36 41
CYNA Natashquan QC CZUL 34 N50 11 24 W061 47 20
CYBC Baie-Comeau QC CZUL 34 N49 07 57 W068 12 16
CYYY Mont-Joli QC CZUL 34 N48 36 32 W068 12 27
CYGP Gaspé (Michel Pouliot) QC CZUL 34 N48 46 31 W064 28 47
CYFB Iqaluit NU CZUL 36 N63 45 23 W068 33 21
CYMT Chibougamau/Chapais QC CZUL 33 N49 46 19 W074 31 41
CYAH La Grande-4 QC CZUL 33 N53 45 17 W073 40 31
CYTQ Tasiujaq QC CZUL 33 N58 40 04 W069 57 21
CYKQ Waskaganish QC CZUL 33 N51 28 24 W078 45 30
CYIK Ivujivik QC CZUL 36 N62 25 02 W077 55 31
CYPX Puvirnituk QC CZUL 36 N60 03 08 W077 17 15
CYHA Quaqtaq QC CZUL 36 N61 02 47 W069 37 04
CYBG Bagotville QC CZUL 33 N48 19 50 W070 59 47
CYRQ Trois-Rivières QC CZUL 33 N46 21 06 W072 40 50
CYMW Maniwaki QC CZUL 33 N46 16 22 W075 59 26
CYKO Akulivik QC CZUL 36 N60 49 07 W078 08 55
CYAS Kangirsuk QC CZUL 36 N60 01 38 W069 59 57
CYZG Salluit QC CZUL 36 N62 10 46 W075 40 02
CYKG Kangiqsujuaq (Wakeham Bay) QC CZUL 36 N61 35 19 W071 55 46
CYLC Kimmirut NU CZUL 36 N62 50 53 W069 52 38
CYNM Matagami QC CZUL 33 N49 45 42 W077 48 10
CYPP Parent QC CZUL 33 N47 55 55 W074 36 29
CYSK Sanikiluaq NU CZUL 33 N56 32 13 W079 15 00
CYMU Umiujaq QC CZUL 33 N56 32 10 W076 31 06
CTU2 Fontanges QC CZUL 33 N54 33 14 W071 10 24
CYHH Nemiscau QC CZUL 33 N51 41 28 W076 08 08
CRB4 Rivière Bonnard QC CZUL 33 N50 42 16 W071 09 45
CYLU Kangiqsualujjuaq (Georges River) QC CZUL 34 N58 42 41 W065 59 34
CSF3 Poste Montagnais (Mile 134) QC CZUL 34 N51 53 19 W065 42 54
CYHR Chevery QC CZUL 34 N50 28 08 W059 38 12
CYYG Charlottetown PE CZQM 34 N46 17 21 W063 07 09
CYQY Sydney/J.A. Douglas McCurdy NS CZQM 34 N46 09 41 W060 02 53
CYQM Moncton/Greater Moncton Intl NB CZQM 34 N46 06 44 W064 40 43
CYSJ Saint John NB CZQM 34 N45 18 58 W065 53 25
CYFC Fredericton Intl NB CZQM 34 N45 52 08 W066 32 14
CYHZ Halifax/Stanfield Intl NS CZQM 34 N44 52 52 W063 30 31
CYQI Yarmouth NS CZQM 34 N43 49 37 W066 05 17
CYZX Greenwood NS CZQM 34 N44 59 04 W064 55 01
CZBF Bathurst NB CZQM 34 N47 37 47 W065 44 20
CYGR Îles-de-la-Madeleine QC CZQM 34 N47 25 30 W061 46 41
CSB2 Sable Island NS CZQM 34 N43 55 46 W059 57 35
CYPD Port Hawkesbury NS CZQM 34 N45 39 24 W061 22 05
CYSL St-Leonard NB CZQM 34 N47 09 27 W067 50 05
CZUM Churchill Falls NL CZQX 34 N53 33 43 W064 06 23
CYCA Cartwright NL CZQX 34 N53 40 58 W057 02 31
CYDF Deer Lake NL CZQX 34 N49 12 40 W057 23 29
CYQX Gander Intl NL CZQX 34 N48 56 13 W054 34 05
CYJT Stephenville NL CZQX 34 N48 32 29 W058 33 00
CYYT St. John's Intl NL CZQX 34 N47 37 07 W052 45 09
CYMH Mary's Harbour NL CZQX 34 N52 18 10 W055 50 52
CYDP Nain NL CZQX 34 N56 33 02 W061 40 56
CYAY St. Anthony NL CZQX 34 N51 23 31 W056 04 59
CYYR Goose Bay NL CZQX 34 N53 19 09 W060 25 33
LFVP St-Pierre France FR CZQX 34 N46 45 47 W056 10 27
CDA5 St. Andrews (Codroy Valley) NL CZQX 34 N47 46 33 W059 18 45
CYFT Makkovik NL CZQX 34 N55 04 38 W059 11 15

D.8 Examples of SIGMET messages

Example (1): An observed line of thunderstorms over north-western Ontario late in the day. This is the fourth SIGMET message issued for this event.

International (ICAO)

WSCN03 CWAO 162225
CZWG SIGMET A4 VALID 162225/170225 CWEG-
CZWG WINNIPEG FIR SQLN TS OBS WTN 20NM OF LINE N4929 W09449 -
N5104 W09348 - N5209 W09120 TOP FL340 MOV E 15KT NC=

National

WSCN23 CWAO 162225
CZWG SIGMET A4 VALID 162225/170225 CWEG-
CZWG WINNIPEG FIR SQLN TS OBS WTN 20NM OF LINE /N4929 W09449/25 SW CYQK - /N5104 W09348/CYRL - /N5209 W09120/60 NW CYPL TOP FL340 MOV E 15KT NC
RMK GFACN33=

This SIGMET is updated after 00Z on the 17th such that there is a reset of the SIGMET number while the letter remains the same.

International (ICAO)

WSCN03 CWAO 170205
CZWG SIGMET A1 VALID 170205/170605 CWEG-
CZWG WINNIPEG FIR SQLN TS OBS WTN 20NM OF LINE N4915 W09332 - N5103 W09212 - N5144 W08943 TOP FL310 MOV E 15KT WKNG=

National

WSCN23 CWAO 170205
CZWG SIGMET A1 VALID 170205/170605 CWEG-
CZWG WINNIPEG FIR SQLN TS OBS WTN 20NM OF LINE /N4915 W09332/45 SE CYQK - /N5103 W09212/60 E CYRL - /N5144 W08943/25 NE CYPL TOP FL310 MOV E 15KT WKNG
RMK GFACN33=

Example (2): Severe mountain waves (lee waves) along the eastern side of the Rockies. The line falls entirely within the Edmonton FIR but covers two GFA regions. The remark line in the National SIGMET message will mention the affected GFACNs.

International (ICAO)

WSCN02 CWAO 161220
CZEG SIGMET L1 VALID 161220/161620 CWEG-
CZEG EDMONTON FIR SEV MTW FCST WTN 30NM OF LINE N5614 W12155 - N5105 W11440 FL070/140 QS INTSFYG=

National

WSCN22 CWAO 161220
CZEG SIGMET L1 VALID 161220/161220 CWEG-
CZEG EDMONTON FIR SEV MTW FCST WTN 30NM OF LINE /N5614 W12155/45 W CYXJ - /N5105 W11440/25 W CYYC FL070/140 QS INTSFYG
RMK GFACN31/GFACN32=

Example (3): Following an AIREP for severe turbulence encounter over the Northern Atlantic, the following SIGMET messages are issued. This event spans over Gander Domestic and Gander Oceanic FIRs as well as GFACN34.

International (ICAO)

CZQX

WSCN07 CWAO 161220
CZQX SIGMET E1 VALID 161220/161620 CWUL-
CZQX GANDER DOMESTIC FIR SEV TURB OBS AT 1155Z WTN 45NM OF LINE N5319 W06025 - N5615 W05245 - N5930 W04715 FL280/350 MOV NE 20KT NC=

CZQX (Oceanic)

WSNT01 CWAO 161220

CZQX SIGMET U1 VALID 161220/161620 CWUL-
CZQX GANDER OCEANIC FIR/CTA SEV TURB OBS AT 1155Z WTN 45NM OF LINE
N5319 W06025 - N5615 W05245 N5930 W04715 FL280/350 MOV NE 20KT NC=

National

CZQX

WSCN27 CWAO 161220
CZQX SIGMET E1 VALID162225/170225 CWUL-
CZQX GANDER DOMESTIC FIR SEV TURB OBS AT 1155Z WTN 45NM OF LINE /N5319 W06025/CYYR - /N5615 W05245/ - /N5930 W04715/ FL280/350 MOV NE 20KT NC

RMK GFACN34/CZQX GANDER OCEANIC FIR/CTA SIGMET U1=

CZQX (Oceanic)

WSNT21 CWAO 162225
CZQX SIGMET U1 VALID 162225/170225 CWUL-
CZQX GANDER OCEANIC FIR/CTA SEV TURB OBS AT 1155Z WTN 45NM OF LINE /N5319 W06025/CYYR - /N5615 W05245/ - /N5930 W04715/ FL280/350 MOV NE 20KT NC
RMK GFACN34/CZQX GANDER DOMESTIC FIR SIGMET E1

Since this event spans over two FIRs, the remark line cross-references the SIGMET messages. Note that only the first coordinate point relates to an aviation reference site. The other two coordinate points being into Gander Oceanic FIR, they are defined only in latitudes and longitudes as per section 5.8.3.4.

Example (4): The centre of hurricane Maria is about to move across the Avalon Peninsula. The tropical cyclone SIGMET (WCCN) is updated and only covers the Gander Domestic FIR and GFACN34 since the CB activity is confined with a radius of 150NM from the centre of the hurricane.

International (ICAO)

WCCN07 CWAO 161800
CZQX SIGMET G3 VALID 1601800/170000 CWUL-
CZQX GANDER DOMESTIC FIR TC MARIA OBS AT 1800Z N4720 W05430/
CB TOP FL360 WTN 150NM OF CENTRE MOV NE 40KT WKNG FCST 0000Z TC CENTRE N5110 W05030=

National

WCCN27 CWAO 161800
CZQX SIGMET G3 VALID 161800/170000 CWUL-
CZQX GANDER DOMESTIC FIR TC MARIA OBS AT 1800Z N4720 W05430/75 SW CYYT CB TOP FL360 WTN 150NM OF CENTRE MOV NE 40KT WKNG FCST 0000Z TC CENTRE N5110 W05030/180 NE CYYT
RMK GFACN34=

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