World Wide Weather Briefing – Event Week 2013 Satellite Imagery Interpretation of Severe Thunderstorms in the USA. Dan Bikos Cooperative Institute for.

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Presentation transcript:

World Wide Weather Briefing – Event Week 2013 Satellite Imagery Interpretation of Severe Thunderstorms in the USA. Dan Bikos Cooperative Institute for Research in the Atmosphere (CIRA) Fort Collins, Colorado, USA

My Location +Fort Collins, Colorado

National Weather Service Severe Thunderstorm Products Storm Prediction Center (SPC) in Norman, Oklahoma Issues: Convective Outlooks Severe Thunderstorm and Tornado watch boxes National Weather Service Forecast Offices (122 nationwide) issue Severe Thunderstorm / Tornado warnings. These are take action statements when severe thunderstorms are occurring and about to strike your location.

Tools for Severe Thunderstorm Forecasting / Warnings NWP Model Output Satellite ImagerySurface Observations Radar Upper Air Soundings

Objectives Focus will be on satellite applications. Much information can be obtained from satellite imagery: – Air mass identification. – Identification of changes in the pre-storm environment. – Monitor the changing environment during the nowcast time period. Particularly useful in data void regions.

May 5, 2008 Example

2.5 cm 10.8 cm Hail diameter size (cm)

June 9, 2005 Example

Photo by Scott Blair, from

June 24, 2003 Example

© Alexandre Fierro

Inflow Feeder Clouds

May 20, 1998 Example

Towering Cumulus above the Rear- Flank Downdraft (RFD)

Hail diameter size = 7 cm F3 tornado slightly after this time

July 24, 2000 Example

+

Summary Much information can be obtained from satellite imagery: – Air mass identification. – Identification of changes in the pre-storm environment. – Monitor the changing environment during the nowcast time period. Particularly useful in data void regions.