Initiation
|
Factor |
Excellent |
Good |
Ok |
Bad |
Notes |
|
Boundary |
Strong |
Moderate |
Weak |
None |
|
|
CIN |
<15 |
15-30 |
30-60 |
>60 |
J/kg |
|
850-500 Θe |
>342 |
>340 |
>338 |
<334 |
K |
|
LI |
<-4 |
-2 to -4 |
0 to -2 |
>0 |
|
|
TT |
55-60 |
50-55 |
45-50 |
<45 |
|
Wind
|
Factor |
Excellent |
Good |
Ok |
Bad |
Notes |
|
700-500 Td
Depression |
>20 |
10-19 |
5-9 |
<5 |
°C |
|
850-500 Γ |
>7.5 |
6.5-7.5 |
5.5-6.5 |
<5.5 |
°C/km |
|
Sfc-mid* Θe Diff |
>25 |
18-25 |
12-18 |
<12 |
K, *min of
700-400 |
|
700-400 SR
Flow |
>30 |
20-29 |
12-19 |
<12 |
kts |
|
3hr Δpsfc |
>6 |
4-6 |
3-4 |
<3 |
mb |
|
Max Td
Dep lowest 100mb |
>15 |
10-15 |
5-10 |
<5 |
°C |
|
Tw
< 700mb |
Dry adiabatic |
Moist adiabatic |
Weak inversion |
Strong inversion |
|
Other factors: TEI >30,
FZL>LCL
|
DCAPE (J/kg) |
500 |
1000 |
1350 |
1500 |
2000 |
2500 |
3000 |
|
Wind (mph) |
35 |
50 |
58 |
61 |
70 |
79 |
86 |
Hail
|
Factor |
Excellent |
Good |
Ok |
Bad |
Notes |
|
700-400 SR Flow |
>30 |
20-29 |
12-19 |
<12 |
kts |
|
Env FZL |
<11 |
11.5-13.5 |
14-16 |
>17 |
k ft |
|
Mesocyclone Intensity |
Strong & Deep |
Moderate &
Deep |
Weak &
Shallow |
None |
|
Other factors: "fat" growth
zone CAPE (-10°C to -30°C), 0-6km shear >40kts, WBZ 7.5-10kft
Flash Flood
|
Factor |
Excellent |
Good |
Ok |
Bad |
Notes |
|
PWAT |
>200 |
150-200 |
100-150 |
<100 |
% norm |
|
Storm
Motion |
<5 |
5-10 |
10-20 |
>20 |
kts |
|
Precip Efficiency |
High |
Moderate |
Low |
Very Low |
Warm Processes |
|
K Index |
40 |
>30 |
20-30 |
<20 |
|
Other factors: Soil, Topography,
Burn Scars, Urban/Rural, Training