Niwot Ridge LTER Snow Report for January 2002
Snowpack conditions have changed little in the past month:
still on the dry side at C1, the South Platte, and the state of Colorado.
The lowest snowpacks are in the southwestern part of the state,
and the highest are central and north.

On 31 January 2002, hand measurements at C1 showed 
the snowpack to contain 4.25 inches
of water, which is 51% of the long term average, and an increase
of 6% over a month ago.
There was only one other year lower than this, the 1994/95 season (3.9").
The SnoTel records show C1 to have 4.1" (53% of average) snow water
equivalent, and 5.7" (68%) cummulative winter precipitation.
These percentages suggest that less of the winter precipitation
has been sequestered in snowpack, than usual.

Statewide conditions, from the NRCS SnoTel records,
show the South Platte basin snowpack to be
54% of average, which is the same as a month ago. 
The highest snowpack percentage is 70% in the Upper Colorado
River basin, 
and the lowest is 48% in the Upper Rio Grande.  The snowpack
values are virtually the same as the cumulative precipitation 
in both of these basins, indicating there is just less moisture,
rather than a change in snowpack related climate conditions.

The manually measured, long term data for C1 follows.

Cheers!
Mark

Sno Tel Data Niwot Ridge, C-1 Snow Water Content (inches) Values are for the end of given month except as noted for May and June
Season Dec Jan Feb Mar Apr May Jun 81/82 4.75 10.5 11.75 15.5 14.9 12.0 (17th) 82/83 3.63 4.75 12.75 17 11.75 (30th) 83/84 12.6 13.25 15 18.9 20.75 84/85 3.75 6.25 8.5 10.25 8.75 85/86 6.5 7.5 14 15.38 17.5 86/87 6.25 8.75 11.25 12.75 11.75 87/88 6.5 9.1 12.4 15.75 14.5 88/89 5.5 7.6 11 10.25 5.6 89/90 6.5 9.25 10.75 16.1 16.5 90/91 3 5 7.1 9.38 10 91/92 6.65 6.75 8.5 12.25 10.25 92/93 5.75 6.75 10.75 14 15.875 93/94 7.125 9.063 12.25 13.25 13.25 2.5 (18th) 94/95 2.625 3.925 7.0 10.125 16.75 17.0 (22nd) 12.375 (13th) 19.75 (30th) 95/96 7.50 12.00 17.5 20.375 18.75 6.125 (15th) 96/97 8.75 12.625 15.125 14.625 20.375 18.0 (15th) 97/98 7.0625 10.0 10.125 12.875 17.25 12.875 (15th) 98/99 3.25 6.625 8.375 9.125 14.125 14.25 (15th) 99/2000 3.5 7.5 10.625 12.375 7.625 00/2001 4.375 5.375 7.125 10.00 9.125 01/2002 2.625 4.25 Average 5.628 8.103 10.694 13.301 14.031

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This material is based upon work supported by the National Science Foundation under Cooperative Agreement
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