Nenana_River_Project_Title
Studying River Ice title

RIVER ICE FREEZE-UP OBSERVATIONS - HEALY, AK

Location: HEALY
      Date: 20 October 2008 (081020)
     Time: 10:40 am
GENERAL FrzUp
ICE CONDITIONS
Upstream Border  
Ice Extent (%) 30
   
Border ice change  
None X
Fracture  
Flooding  
Movement  
   
Downstream Border  
Ice Extent (%) 20
   
Border ice extent  
None X
Fractured  
Flooding  
Movement  
   
Across Stream  
Channel Ice Type  
None  
Frazil X
Pancakes, small X
Pancakes, large  
   
Frost Smoke (Y/N) N
DAILY PHOTOGRAPHS OF THE RIVER FREEZE UP CONDITIONS
1) ACROSS water body photo: Healy, 20 October 2008, across

COMMENTS:

2) DOWNSTREAM water body photo: Healy, 20 October 2008, downstream

COMMENTS:

3) UPSTREAM water body photo: Healy, 20 October 2008, upstream

COMMENTS:

 















To see larger versions of these images click here.
ENVIRONMENTAL CONDITIONS
Select (X) one from each catagory:
Sky: (0%)  
  (<10%)  
  (10-25%) X
  (25-50%)  
  (50-90%)  
  (>90%)  
     
Wind: calm  
  light wind  X
  windy  
     
Precipitation: none  X
  snow flurries  
  snowing  
  dizzle  
  rain  
  freezing rain  
     
Ice surfaces: smooth  
(may choose rough  X
more than blocky/broken/jumbled  
one) wet/flooded  X
  holes/leads  
  bare (melting)  

ice jam  
     
Snow on ice: none (bare, cold)  
  new - patchy  
  new - continuous  
  stable with new snow layer  
  stable/no change X
  wind redistributed  
  icy crust  
  melting/wet  
  none (bare, warm)  
     
Snow on none  
bank/shore: new, patchy  
  new, continuous  
  stable with new snow layer  
  stable/no change X
  wind distributed  
  icy crust  
  melting/wet  

OTHER COMMENTS

It was -10.6°C at time of observation.  We have had a couple nights of cooler temperatures down around -20°C.

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