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Christman Field Latest Observations
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Date Time
MST
Temp
°F
RH
%
DewPt
°F
Wind
mph
Dir
°
Gust
mph
Dir
°
Press
in Hg
Solar
W/m^2
Prec
in
2022-12-01 01:25 10.7 88.0 7.8 5.0 99 8.8 136 24.662 0.1 0.00
2022-12-01 01:20 10.2 87.9 7.3 2.2 112 5.3 234 24.661 0.1 0.00
2022-12-01 01:15 10.7 86.9 7.5 2.8 232 6.4 236 24.664 0.1 0.00
2022-12-01 01:10 10.8 88.9 8.2 2.7 149 4.3 149 24.667 0.0 0.00
2022-12-01 01:05 11.1 88.8 8.4 1.7 221 2.9 197 24.668 0.0 0.00
2022-12-01 01:00 10.9 87.4 7.9 3.1 208 6.9 168 24.674 0.0 0.00
2022-12-01 00:55 11.5 86.4 8.2 4.1 166 6.8 173 24.669 0.0 0.00
2022-12-01 00:50 12.1 85.9 8.7 1.4 101 4.5 101 24.670 0.0 0.00
2022-12-01 00:45 11.6 89.3 9.1 3.6 117 5.1 70 24.674 0.0 0.00
2022-12-01 00:40 13.3 84.7 9.5 5.2 46 10.5 49 24.672 0.0 0.00
2022-12-01 00:35 15.5 87.3 12.4 2.0 299 4.3 268 24.669 0.0 0.00
2022-12-01 00:30 14.2 88.0 11.3 4.5 268 8.2 292 24.672 0.0 0.00
2022-12-01 00:25 12.7 91.5 10.7 6.5 304 10.1 265 24.670 0.0 0.00
2022-12-01 00:20 11.3 88.7 8.6 5.0 254 8.5 253 24.674 0.0 0.00
2022-12-01 00:15 11.8 88.4 9.1 3.0 320 5.5 278 24.674 0.0 0.00
2022-12-01 00:10 10.2 91.1 8.1 2.3 279 5.7 280 24.673 0.1 0.00
2022-12-01 00:05 9.9 90.9 7.8 2.7 267 4.3 278 24.676 0.1 0.00
2022-12-01 00:00 9.6 89.0 7.0 1.9 117 5.0 292 24.673 0.1 0.00
2022-11-30 23:55 9.6 88.8 6.9 1.8 287 3.9 285 24.676 0.1 0.00
2022-11-30 23:50 9.5 87.3 6.5 1.8 152 4.4 311 24.682 0.0 0.00
2022-11-30 23:45 11.4 87.7 8.4 3.4 313 7.0 338 24.678 0.0 0.00
2022-11-30 23:40 11.6 90.3 9.4 2.7 122 4.0 211 24.679 0.0 0.00
2022-11-30 23:35 11.4 92.5 9.7 1.8 170 3.1 136 24.677 0.0 0.00
2022-11-30 23:30 9.4 91.4 7.4 2.6 132 4.0 165 24.682 0.0 0.00
2022-11-30 23:25 10.4 87.7 7.5 1.5 207 2.9 232 24.678 0.0 0.00
2022-11-30 23:20 10.3 93.2 8.7 4.6 150 6.4 135 24.679 0.1 0.00
2022-11-30 23:15 8.4 89.9 6.1 2.4 123 6.9 271 24.685 0.1 0.00
2022-11-30 23:10 9.5 88.6 6.8 0.9 289 1.9 289 24.681 0.0 0.00
2022-11-30 23:05 10.0 90.3 7.8 0.9 120 1.6 120 24.689 0.1 0.00
2022-11-30 23:00 9.5 90.6 7.3 0.5 237 2.6 190 24.692 0.1 0.00
Date Time
MST
Temp
°C
RH
%
DewPt
°C
Wind
m/s
Dir
°
Gust
m/s
Dir
°
Press
hPa
Solar
W/m^2
Prec
mm
2022-12-01 01:25 -11.8 88.0 -13.4 2.2 99 3.9 136 835.17 0.1 0.00
2022-12-01 01:20 -12.1 87.9 -13.7 1.0 112 2.4 234 835.12 0.1 0.00
2022-12-01 01:15 -11.9 86.9 -13.6 1.2 232 2.8 236 835.23 0.1 0.00
2022-12-01 01:10 -11.8 88.9 -13.2 1.2 149 1.9 149 835.32 0.0 0.00
2022-12-01 01:05 -11.6 88.8 -13.1 0.8 221 1.3 197 835.37 0.0 0.00
2022-12-01 01:00 -11.7 87.4 -13.4 1.4 208 3.1 168 835.56 0.0 0.00
2022-12-01 00:55 -11.4 86.4 -13.2 1.8 166 3.0 173 835.40 0.0 0.00
2022-12-01 00:50 -11.1 85.9 -13.0 0.6 101 2.0 101 835.43 0.0 0.00
2022-12-01 00:45 -11.3 89.3 -12.7 1.6 117 2.3 70 835.55 0.0 0.00
2022-12-01 00:40 -10.4 84.7 -12.5 2.3 46 4.7 49 835.48 0.0 0.00
2022-12-01 00:35 -9.2 87.3 -10.9 0.9 299 1.9 268 835.40 0.0 0.00
2022-12-01 00:30 -9.9 88.0 -11.5 2.0 268 3.7 292 835.49 0.0 0.00
2022-12-01 00:25 -10.7 91.5 -11.8 2.9 304 4.5 265 835.43 0.0 0.00
2022-12-01 00:20 -11.5 88.7 -13.0 2.2 254 3.8 253 835.57 0.0 0.00
2022-12-01 00:15 -11.2 88.4 -12.7 1.4 320 2.5 278 835.56 0.0 0.00
2022-12-01 00:10 -12.1 91.1 -13.3 1.0 279 2.5 280 835.54 0.1 0.00
2022-12-01 00:05 -12.3 90.9 -13.5 1.2 267 1.9 278 835.63 0.1 0.00
2022-12-01 00:00 -12.4 89.0 -13.9 0.9 117 2.3 292 835.54 0.1 0.00
2022-11-30 23:55 -12.5 88.8 -13.9 0.8 287 1.7 285 835.64 0.1 0.00
2022-11-30 23:50 -12.5 87.3 -14.2 0.8 152 2.0 311 835.82 0.0 0.00
2022-11-30 23:45 -11.5 87.7 -13.1 1.5 313 3.1 338 835.70 0.0 0.00
2022-11-30 23:40 -11.3 90.3 -12.6 1.2 122 1.8 211 835.72 0.0 0.00
2022-11-30 23:35 -11.4 92.5 -12.4 0.8 170 1.4 136 835.67 0.0 0.00
2022-11-30 23:30 -12.6 91.4 -13.7 1.2 132 1.8 165 835.84 0.0 0.00
2022-11-30 23:25 -12.0 87.7 -13.6 0.7 207 1.3 232 835.71 0.0 0.00
2022-11-30 23:20 -12.1 93.2 -12.9 2.0 150 2.8 135 835.72 0.1 0.00
2022-11-30 23:15 -13.1 89.9 -14.4 1.1 123 3.1 271 835.94 0.1 0.00
2022-11-30 23:10 -12.5 88.6 -14.0 0.4 289 0.9 289 835.81 0.0 0.00
2022-11-30 23:05 -12.2 90.3 -13.5 0.4 120 0.7 120 836.07 0.1 0.00
2022-11-30 23:00 -12.5 90.6 -13.7 0.2 237 1.2 190 836.18 0.1 0.00
CIRA

Cooperative Institute for Research in the Atmosphere

Fassnacht, Steven

Steven Fassnacht

CIRA Fellow

Job Title:

Professor, Colorado State University

Email Address:

About Me:


Research Interests:

Prof. Fassnacht’s research interests include improving our understanding of snow and cold land hydrological processes, especially considering different complexities of models. These models are used for water resources forecasting, hydrological simulations, and climate modelling. My focuses are improving the data used for modelling and understanding the sensitivity of process formulations. We have tried to improve weather radar estimation of snowfall for hydrological modelling.  We have created a time series of snow water equivalent maps for the Western United States that together with fractional snow covered area data have been assimilated into a hydrological model.  We have examined how wind influences precipitation measurements (as snow) compared to snowpack losses via sublimation and blowing snow.

 

Hydrological and meteorological data exist at various spatial and temporal scales that can influence our analysis.  Use of specific data can tell us a specific story that may not be relevant in the bigger picture. For example, a series of large snow storms in January of 1999 created havoc for transportation in Southern Ontario and early indications were that severe flooding was likely. However, due to several preceeding dry years and a dry spring, the lowest peak flows on record were observed.

 

We have examined the scales for snow depth sampling using fractal analysis, looked at averaging and sub-setting of large datasets, and investigated the interannual consistency of snowpack distribution patterns.  Together with Nolan Doesken at the Colorado Climate Center, we have examined the measurement of snow depth using Ultra Sonic Snow Depth Sensors.

Recent work on snow crystals has translated into investigating snow surface roughness. We have developed a method to use digital photography to analysis snow surface roughness and have compared different evaluation metrics.  We have shown how the snowpack surface roughness changes over time, has directionality, scales over space, and is influenced by dust on snow.