AWC Graphical Forecast for Aviation (original) (raw)
Flight Cat |
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LIFR |
IFR |
MVFR |
VFR |
non-ceiling clouds below 3000 ft |
All Symbols |
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| PIREP | | | | | | | | | | |
| --------------------------- | --- | ----- | --- | ---- | --- | --- | --- | --- | -- | |
| Turb | Ice | Other | | | | | | | | |
| | | | | | | | | | | | | | |
| NIL | LGT | MOD | SEV | LLWS | NIL | LGT | MOD | SEV | | |
Radar (dBZ) |
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5 |
15 |
25 |
35 |
45 |
55 |
65 |
Radar Echo Tops (kft) |
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5 |
15 |
25 |
35 |
45 |
55 |
65 |
Lightning (event density per 5 min) |
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No Coverage over Alaska |
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10 |
20 |
30 |
40 |
50 |
60 |
70 |
Wind Speed (kt) |
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10 |
20 |
30 |
40 |
80 |
120 |
160 |
Wind Barbs |
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Calm |
15kt |
60kt |
25G30kt |
Sky Coverage <FL180 |
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FEW |
SCT |
BKN |
OVC |
Cloud Top (MSL x100 ft) |
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060 |
120 |
180 |
300 |
420 |
Cloud Base (MSL x100 ft) |
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060 |
120 |
180 |
Sky Cover <FL180 |
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SKC |
FEW |
SCT |
BKN |
OVC |
Density Alt Dev (ft) |
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500 |
1000 |
1500 |
2000 |
2500 |
3000 |
3500 |
4000 |
Weather Symbols |
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Weather |
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Haze |
Smoke |
Fog |
Dust/Sand |
TCF |
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Coverage |
Lines |
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Sparse25-39% |
Medium40-74% |
Solid75-100% |
Echo Tops (hft) |
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<40 dBz |
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≥40 dBz |
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<25 |
25-30 |
30-35 |
35-40 |
>40 |
Icing Severity |
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Trace |
Light |
Mod |
Heavy |
Icing Severity with SLD |
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Trace |
Light |
Mod |
Heavy |
SLD |
Icing Probability (%) |
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5 |
15 |
25 |
35 |
45 |
55 |
65 |
75 |
Freezing Level (MSL x100ft) |
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|
010 |
030 |
050 |
070 |
090 |
110 |
130 |
150 |
170 |
RAP Icing (%) |
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10 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
Temperature |
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C |
-70 |
-65 |
-60 |
-55 |
-50 |
-45 |
-40 |
-35 |
-30 |
-25 |
-20 |
-15 |
-10 |
-5 |
0 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
F |
-94 |
-85 |
-76 |
-67 |
-58 |
-49 |
-40 |
-31 |
-22 |
-13 |
-4 |
5 |
14 |
23 |
32 |
41 |
50 |
59 |
68 |
77 |
86 |
95 |
GTG (Eddy Dissipation Rate) |
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L |
MOD |
SEV |
E |
Heavy |
|
LGT |
MOD |
SEV |
EXTRM |
Medium |
|
L |
MOD |
SEV |
EXTRM |
Light |
|
10 |
20 |
40 |
60 |
80 |
100 |
(m2/s3)1/3 × 100 |
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LLWS (/s) |
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0 |
.06 |
.12 |
.18 |
.24 |
.3 |
SIGMET
G-AIRMET/AIRMET
NWS Warnings