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NWS Forecast Office Assessment of GOES Sounder Atmospheric Instability

NWS Forecast Office Assessment of GOES Sounder Atmospheric Instability. Summer 99 Forecaster assessment of usefulness of changes in hourly LI, CAPE, & CINH product for predicting location/timing of thunderstorms There were 248 valid weather cases. - Significant Positive Impact (30%)

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NWS Forecast Office Assessment of GOES Sounder Atmospheric Instability

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  1. NWS Forecast Office Assessment ofGOES Sounder Atmospheric Instability Summer 99 Forecaster assessment of usefulness of changes in hourly LI, CAPE, & CINH product for predicting location/timing of thunderstorms There were 248 valid weather cases. - Significant Positive Impact (30%) - Slight Positive Impact (49%) - No Discernible Impact (19%) - Slight Negative Impact (2%) - Significant Negative Impact (0) Figure from the National Weather Service, Office of Services

  2. 3h 20km RUC cloud-top fcst w/ GOES cloud assimilation Verification Cloud-top pressure based on NESDIS product Effect of GOES (sounder cloud) data on 3-h RUC cloud forecasts “much improved cloud forecasts” 1800 UTC Tues 2 Oct 2001 Stan Benjamin – NOAA/FSL 3h 40km RUC cloud-top fcst No GOES cloud assimilation

  3. Data Assimilation -- Satellite Data Improving Forecasts Positive forecast impact (%) of both GOES and POES data in the EDAS (Eta Data Assimilation/Forecast System) on standard meteorological state variables for the seasons thus far evaluated (fall 2001 and winter 2001/2002).

  4. Satellite winds on GFDL Forecasts GOES-8 1km visible Soden et al. Former National Hurricane Center director Robert Sheets once said that if he had only one tool to do his forecasting job, it would be the geostationary weather satellite. http://www.usatoday.com/weather/news/2000/w330satann.htm

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