NAVTEX Decode Table

Environment Canada issues NAVTEX compatible forecast bulletins as part of its marine weather products for select marine areas in the Pacific, Arctic, Great Lakes, St. Lawrence River, Gulf of St. Lawrence and Atlantic regions.

Time / Date
Sub-Areas
Cardinal Direction
Forecast Parameters
Wind
Precipitation
Visibility
Freezing Spray
Technical Synopsis – Trend
Technical Synopsis – Systems
Technical Synopsis – Position
Technical Synopsis – Canada
Cardinal Direction in Synopsis
Waves
Ice – General
Ice Type
Ice Concentration
Ice Terms
Ice Direction


Time / Date

TermAbbreviation
Aprilapr
Augustaug
Decemberdec
Februaryfeb
Fridayfri
Januaryjan
Julyjul
Junejun
Marchmar
Maymay
Mondaymon
Novembernov
Octoberoct
Saturdaysat
Septembersep
Sundaysun
Thursdaythu
todaytdy
tonighttnght
Tuesdaytue
Wednesdaywed

 

Sub-Areas

TermAbbreviation
- eastern half-e
- northeastern half-ne
- northern half-n
- northwestern half-nw
- southeastern half-se
- southern half-s
- southwestern half-sw
- western half-w

 

Cardinal Direction

TermAbbreviation
easte
northn
northeastne
northwestnw
souths
southeastse
southwestsw
westw

 

Forecast Parameters

TermAbbreviation
correctedcor
exceptxcpt
impliesimpl
indicatedind
knotskt
and locallylcly
metersm
millibarmb
nautical milenm
unlessunl
validvld

 

Wind

TermAbbreviation
lightlgt
variablevrb
warningwng
windwnd
with gusts tog

 

Precipitation

TermAbbreviation
drizzledz
flurrieslgt-sn
freezing drizzlefrz-dz
freezing rainfrz-ra
hailhl
heavy rainhvy-ra
heavy snowhvy-sn
heavy thunderstormstrg-ts
ice pelletsip
in precipitationin-precip
light snowlgt-sn
rainra
rain and snow mixedmix-rasn
scatteredsct
showersshwrs
snowsn
thunderstormtstm
waterspoutwtspt

 

Visibility

TermAbbreviation
above 1abv 1
as low as 1 milenr 1
at timesocnl
blizzardbz
blowing snowbs
fogfg
fog bankspth-fg
heavyhvy
ice fogifg
mistmst
mist patchespth-mist
near zeronr 0
occasionalocnl
one mile or less0-1
sea smokesea smoke
visibilityvis

 

Freezing Spray

TermAbbreviation
at timesocnl
freezing sprayfrz-spr
moderatemod
outside the ice edgeout-edge
over open waterovr-ow
riskrsk
severesev

 

Technical Synopsis – Trend

TermAbbreviation
approachingapchg
buildingbldn
dissipatingdiss
deepeningdpn
departingdprtg
intensifyingintsf
mergingmerg
quasi-stationaryq-stnr
splittingsplit
weakeningwkn

 

Technical Synopsis – Systems

TermAbbreviation
colcol
cold frontc-front
disturbancedisturb
flat lowflat low
frontal systemfront
highhigh
hurricanehurr
lowlow
post tropical stormpost-trop-strm
ridgeridge
stormstrm
tropical depressiontrop-dep
tropical stormtrop-strm
troughtrough
warm frontw-front

 

Technical Synopsis – Position

TermAbbreviation
capecap
coastalcstl
extendingextdg
fromfm
islandis
lakelk
latitudelat
located (cardinal)(cardinal)
located (xx miles)(xx miles)
located atat
located fromfm
located nearnr
located offoff
located on a lineon line
located overovr
longitudelong
nearnr
overovr
peninsulapen
riverriv
straitstr

 

Technical Synopsis – Canada

TermAbbreviation
AlbertaAlta
British ColumbiaBC
Great lakesGrt Lks
Gulf of St. LawrenceGu St Law
LabradorLab
ManitobaMan
New BrunswickNB
NewfoundlandNfld
Newfoundland and LabradorNL
Northwest TerritoriesNWT
Nova ScotiaNS
OntarioOnt
PacificPac
Prince Edward IslandPEI
QuebecQue
SaskatchewanSask
Yukon TerritoryYT

 

Cardinal Direction in Synopsis

TermAbbreviation
easte
east - weste-w
easternern
northn
north - southn-s
northeastne
northeasternnern
northeast-southwestne-sw
northernnrn
northwestnw
northwesternnwrn
northwest-southeastnw-se
souths
southeastse
southeasternsern
southernsrn
southwestsw
southwesternswrn
westw
westernwrn

 

Waves

TermAbbreviation
ice coveredice

  

Ice – General

TermAbbreviation
edgeedge
estimatedest
exceptxcpt
iceice
includingincl
possibleposs

 

Ice Type

TermAbbreviation
first-year icefyi
grey icegi
grey-white icegwi
medium lake icemedi
new iceni
old iceoi
thick lake icetki
thin lake icethi
very thick lake icevtki
second-year icesyi
multi-year icemyi
new lake iceni

 

Ice Concentration

TermAbbreviation
1 tenth1
10 tenths10
2 tenths2
3 tenths3
4 tenths4
5 tenths5
6 tenths6
7 tenths7
8 tenths8
9 plus tenths9+
9 tenths9
9 to 10 tenths (lake ice)9-10
bergy waterbw
consolidatedcons
ice freeif
open waterow
trace oftr-

 

Ice Terms

TermAbbreviation
lightlgt
moderatemod
pressurepress
strongstrg

 

Ice Direction

TermAbbreviation
along the coastalng cst
eastwardewd
northeastwardnewd
northwardnwd
northwestwardnwwd
southeastwardsewd
southwardswd
southwestwardswwd
westwardwwd