This case uses AMSU derived moisture products to supplement GOES imagery, numerical prediction model, and other in situ data in predicting the onset and duration of snowfall over Eastern Washington State on 2 February 1999.

The case illustrates the role of real-time AMSU moisture fields during various phases of the forecast process, from synoptic overview to refinement of the precipitation forecast for the Spokane county warning area (CWA). Verification of the snowfall event within the "Forecast Impact" segment highlights how effective utilization of AMSU moisture information can lead to improved short-term precipitation forecasts.

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Please Note

In order to maintain consistency between the AWIPS displays and the text discussions, the following units are being used:

• Z (Zulu Time) is being used in place of UTC
• mb (millibars) is being used in place of HPa
• F (Fahrenheit) is being used in place of C (Celsius) for surface plots
• kts (knots) is being used in place of m/s for surface plots
• in (inches) is being used in place of mm for precipitable water and precipitation amounts
• WV is being used for the GOES 6.7-µm water vapor channel