WMOD00317

• Contract/Permit #: 14-06-D-6999
• Project Name: CAWRP
• Title: Cascades Atmosphere Water Resources Program - Volume I
• Prepared For: US Department of the Interior Bureau of Reclaimation
• Date: 7/1/1970
• Weather Modification - Doc Type: Report

TABLE 4,3

CHARACTERIST!CS OF RHUNG ON ICE CRYSTALS COLLECTED FROM AIRCRAFT IN PACIFIC NORTmJEST STORMS

Crystal Type

Bullet (Clc,
Cld, C2a)

Cold column
(solid and hollow)

Star-like crystals
(Plb, PIc, Pld,
PIe, Plf)

Plates

Warm region crystals,
needles, columns and
sheaths (Nla, 'NIb,
Nlc, Nld, Nle, N2a,
N2b, N2c, Cle, Clf,
and C2b)

-

-

,-

.-

I Threshold Crystal
jDiameter for Riming
I (llm)
:
!
I
I
,
,

Not known

I
!
I
I
;
I
i(width of individual
i crystal arm)
I
I
I
,

I
i
I

> 50

> 100

> 300

> 50

,-

,.

-
,

I
I
I

I Usually none,
loccasionally on C2a.

I Very light
I
,
I Very light.
,Occasionally on Plb
land PIc.

I Light
I

Degree of Riming

! I
I Location of Riming I

ion the main body ----I

leading p:dsm I
!
I
,
1
I
I
!
I
I
I
I
I

,
I
IOn the
,face.

Jon the leading face
jnear the edge of the
Ibranches.

On the leading prism
face and adjacent ~10
prism faces.
Occasionally at the
edges of the basal
Ifaces.

!
Generally moderate up Ion the leading prism
to 10 drops per face of the crystal.
crystal. Occasionally 'Occasionally on the
heavy. basal faces.

,-

,-

,.

!

,-

,.

,.

,.

Diameter of
Droplets
(11m)

Not known

25 to 140

25 to 100

25 to l15

25 to 150

,-

,.

-
,

I-'
...;,:. r-...J
00

f-

,.