Hurricane Tiered Evacuation

Bruce Sterling Chief Regional Coordinator, Region 5

Virginia Department of Emergency Management

Methodology of Determining Hurricane Risk

Historical Approach • SLOSH Maximum of Maximums (MOM) for Cat 1-4 • Evacuation zones developed within each category • Zones not used to communicate evacuation message

New Approach • SLOSH Maximum Envelope of Water (MEOW) for Cat 1-4 • Four evacuation zones developed – tied to storm track scenario • Citizens encouraged to familiarize themselves with their zone

Cat 2 MOM

Cat 2 MEOW – NE 20 MPH

Cat 2 MEOW – WNW 20 MPH

B

C D

B C

A

Storm Intensity Grouping

Storm Track Directional Grouping P to N NNW to WNW

Cat 1 - 2

Cat 3

Cat 4

Cat 1

Cat 2

Cat 3

Cat 4

NE NNE N NNW NW WNW

Evacuation Zone Relation to Storm Track

Cat 1

Cat 2

Cat 3

Cat 4

NE NNE N NNW NW WNW

Populations Impacted

Zone A – 246,946

Zone B – 304,972

Zone C – 407,624

Zone A – 246,946

Zone D – 264,708

Zone A +B+C – 959,452

Zone A +B – 551,918

Zone A +B+C+D– 1,224,250

Cumulative Totals

Community Outreach

Questions?

Bruce Sterling bruce.sterling@vdem.virginia.gov