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Level
Level
MSL
Station Plot
TAF Station Plot
Flight Cat Dots
LIFRIFRMVFRVFR
non-ceiling clouds below 3000 ft
PIREP
TurbIceOther
||
NILLGTMODSEVLLWSNILLGTMODSEV
Radar (dBZ)
5152535455565
Radar Echo Tops (kft)
5152535455565
Lightning (event density per 5 min)
No Coverage over Alaska
10203040506070
Wind Speed (kt)
1020304080120160
Wind Barbs
Calm15kt60kt25G30kt
Sky Coverage <FL180
FEWSCTBKNOVC
Cloud Top (MSL x100 ft)
060120180300420
Cloud Base (MSL x100 ft)
060120180
Sky Cover <FL180
SKCFEWSCTBKNOVC
Flight Cat
LIFRIFRMVFR
Ceiling (ft AGL)
10030050070010002000
Visibility (SM)
0.250.51234
Density Alt Dev (ft)
5001000150020002500300035004000
Precipitation
RainSnowMixIceTS
Chance
LikelySevere
Weather
HazeSmokeFogDust/Sand
Thunderstorm
ISOLSCTNUM
Reflectivity
510152025303540455055606570
Reflectivity
Rain
Freezing Rain
Ice Pellets
Snow
510152025303540455055606570
TCF
CoverageLines
Sparse
25-39%
Medium
40-74%
Solid
75-100%
Echo Tops (hft)
<40 dBz
≥40 dBz
<2525-3030-3535-40>40
SPC Convective Outlook
TSTMMRGLSLGTENHMDTHIGH
SPC Product Description
Winter Weather
SnowMixIce
Chance
Likely
Icing Severity
TraceLightModHeavy
Icing Severity with SLD
TraceLightModHeavySLD
Icing Probability (%)
515253545556575
Freezing Level (MSL x100ft)
010030050070090110130150170
RAP Icing (%)
102030405060708090100
Temperature
C-70-65-60-55-50-45-40-35-30-25-20-15-10-505101520253035
F-94-85-76-67-58-49-40-31-22-13-4514233241505968778695
GTG (Eddy Dissipation Rate × 100)
Lgt
Moderate
  Severe
Ex
Heavy
Lgt
Moderate
  Severe
Extreme
Medium
L
Moderate
  Severe
Extreme
Light
10203040506070809098
LLWS (/s)
0.06.12.18.24.3
Terrain
Below Surface
SIGMET/CWA
Conv-
ective
Thunder
storm
Trop
Cyclone
Blowing
Dust/Sand
Volcanic
Ash

Turb

Icing
G-AIRMET/AIRMET
Sfc
Wind

LLWS
Turb
High
Turb
Low
Frz
Lvl

Icing
Mtn
Obsc
Cig/Vis
(IFR)
NWS Warnings

Tornado
Severe
TS
Winter
Storm

Blizzard
Ice
Storm
Lake
Eff Snow

Storm

Gale
High
Wind