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Cooperative Institute for Research in the Atmosphere
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Search CIRA Website x
Colorado State University
  • Home
  • Welcome & About
    • About CIRA
      • Jobs
      • Letter from Christian Kummerow:
      • Map & Directions
      • Organizational Structure
      • Reports
      • Room Schedules
      • Staff Directory
      • Strategic Plan
      • Vision & Mission Statement
    • Themes
      • Climate and Weather Processes
      • Competitive Projects
      • Data Assimilation
      • Data Distributions
      • Education and Outreach
      • Modeling Systems Research
      • NOAA Projects
      • Satellite Algorithm Development, Training and Education
      • Societal and Economic Impact Studies
    • Collaborative Groups
      • Colorado Climate Center
      • National Park Service
      • Regional and Mesoscale Meteorology Branch
  • Teams
    • Colorado Teams:
      • NOAA/Earth System Research Lab (ESRL) – Boulder, CO
      • Air Quality – Fort Collins, CO
      • Atmospheric Science (ATS) – Fort Collins, CO
      • Carbon – Fort Collins, CO
      • CIRA Software Engineering Group (CSEG) – Fort Collins, CO
      • Data Assimilation (DA) – Fort Collins, CO
      • Data Processing Centers (DPC) – Fort Collins, CO
      • Independent – Fort Collins, CO
      • MetSat – Fort Collins, CO
      • Regional and Mesoscale Meteorology Branch (RAMMB) – Fort Collins, CO
      • Training – Fort Collins, CO
      • Tropical Cyclone – Fort Collins, CO
    • Other Location Teams:
      • National Hurricane Center – Miami, FL
      • NESDIS Environmental Applications Team (NEAT) – College Park, MD
      • NWS/Meteorological Development Laboratory (MDL) – Silver Spring, MD
      • NWS/Aviation Weather Center (AWC) – Kansas City, MO
      • Office of Marine and Aviation Operations (OMAO-Training) – Kansas City, MO
  • News & Events
    • News
      • CIRA Administration News
      • Magazines
      • Reports
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    • Imagery
      • Air Quality Research
        • Improve
        • VIEWS
      • CIRA Algorithm Testbed
      • CIRA Weather Station
      • RAMMB SLIDER
    • Data
      • CloudSat Data Processing Center
      • ECMWF Nature Run
      • RAMSDIS Online
        • GOES-West / GOES-East
        • Synthetic Forecast Imagery
        • Tropical Imagery
        • Suomi NPP VIIRS Imagery
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Search CIRA Website x
Christman Field Latest Observations
Date Time
MST
Temp
°F
RH
%
DewPt
°F
Wind
mph
Dir
°
Gust
mph
Dir
°
Press
in Hg
Solar
W/m^2
Prec
in
2021-04-21 18:55 30.8 93.0 29.0 3.6 154 4.4 152 0.000 0.9 0.00
2021-04-21 18:50 30.7 93.2 29.0 2.7 155 5.7 113 0.000 1.4 0.00
2021-04-21 18:45 30.7 93.3 29.0 2.7 130 4.8 95 0.000 1.9 0.00
2021-04-21 18:40 30.7 93.3 29.0 2.9 107 4.6 106 0.000 2.6 0.00
2021-04-21 18:35 30.7 93.3 29.0 2.5 96 4.1 85 0.000 3.0 0.00
2021-04-21 18:30 30.6 93.2 28.9 2.1 94 4.0 123 0.000 4.4 0.00
2021-04-21 18:25 30.7 93.3 29.0 3.3 99 5.7 139 0.000 5.3 0.00
2021-04-21 18:20 30.7 93.3 29.0 3.1 122 4.4 117 0.000 6.9 0.00
2021-04-21 18:15 30.7 93.0 28.9 2.8 128 3.8 128 0.000 9.0 0.00
2021-04-21 18:10 30.6 92.7 28.7 2.3 110 4.2 136 0.000 11.4 0.00
2021-04-21 18:05 30.6 92.3 28.7 3.3 119 4.1 123 0.000 12.7 0.00
2021-04-21 18:00 30.7 91.9 28.6 2.7 129 4.2 141 0.000 16.6 0.00
2021-04-21 17:55 30.8 91.5 28.6 2.1 127 3.2 139 0.000 21.0 0.00
2021-04-21 17:50 30.7 91.3 28.5 2.1 99 3.6 120 0.000 34.3 0.00
2021-04-21 17:45 30.6 90.6 28.2 3.1 108 4.8 109 0.000 29.4 0.00
2021-04-21 17:40 30.6 90.6 28.2 3.3 67 4.8 110 0.000 35.5 0.00
2021-04-21 17:35 30.6 91.1 28.3 3.3 107 5.0 105 0.000 31.9 0.00
2021-04-21 17:30 30.7 91.4 28.5 3.1 92 4.6 89 0.000 31.5 0.00
2021-04-21 17:25 30.7 91.4 28.5 2.7 116 4.0 103 0.000 34.7 0.00
2021-04-21 17:20 30.7 91.4 28.5 3.4 79 4.2 109 0.000 41.2 0.00
2021-04-21 17:15 30.7 91.4 28.5 3.2 92 4.8 101 0.000 46.0 0.00
2021-04-21 17:10 30.6 90.7 28.2 3.6 108 5.2 109 0.000 49.7 0.00
2021-04-21 17:05 30.6 90.6 28.2 3.5 115 5.2 88 0.000 52.8 0.00
2021-04-21 17:00 30.7 90.2 28.2 4.3 153 5.5 154 0.000 52.9 0.00
2021-04-21 16:55 30.9 90.4 28.4 4.7 149 6.4 142 0.000 57.2 0.00
2021-04-21 16:50 31.0 89.8 28.3 4.3 132 5.6 131 0.000 61.8 0.00
2021-04-21 16:45 31.1 89.1 28.3 5.0 143 6.5 124 0.000 76.3 0.00
2021-04-21 16:40 31.3 89.3 28.5 3.5 113 5.5 116 0.000 94.8 0.00
2021-04-21 16:35 31.2 89.7 28.6 3.6 129 6.2 127 0.000 100.9 0.00
2021-04-21 16:30 31.3 88.1 28.2 4.0 124 5.7 138 0.000 96.9 0.00
CIRA

Cooperative Institute for Research in the Atmosphere

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Fassnacht, Steven

Steven Fassnacht

Fassnacht, Steven
CIRA Fellow

Job Title:
Professor, Colorado State University
Email Address:
Steven.Fassnacht@colostate.edu
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.

Cooperative Institute for Research in the Atmosphere
Colorado State University
3925A West Laporte Ave.
Fort Collins, CO 80521

Phone: 970.491.8448
Fax: 970.491.8241

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