Why Was the Winter of 2013-14 so Cold and Snowy Kevin Birk and Ricky Castro NWS Chicago- Romeoville, IL.

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Presentation transcript:

Why Was the Winter of so Cold and Snowy Kevin Birk and Ricky Castro NWS Chicago- Romeoville, IL

What is an “Average” Winter ( )

What Were the Stats This Winter ( )

What Caused This?

The Jet Stream

The Jet Stream Pattern this Past Winter

The Jet Stream Pattern Winter

What Impacts the Behavior of the Jet Stream?

Upper Level Pattern Near Alaska Also known as East Pacific Oscillation (EPO) Temperature anomalies Pressure anomalies Temperature anomalies Pressure anomalies Jet Stream

Eastern Pacific Oscillation (EPO)

North Atlantic and Arctic Oscillation (NAO/AO)

-NAO signal Jet Stream trough Develops over east CONUS

Conclusion

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