Squall 5 : A sudden increase of wind speed by at least 18 miles per hour (15 knots) and rising to 25 miles per hour (22 knots) or more and lasting for at least one minute
Tom May, CEM, Steve Davis, Larrie Wright, All Hands Community, Glossary of Terms and Definitions (in the fields of Emergency Management, Business Continuity and related service areas), 3rd Ed, USA 2005. http://www.macogonline.org/archive/homeland/emerge ncy_glossary.pdf, (Emr Mgt, Biz Cont and related srvc areas - Brit) {482}
National Huricane Center, University of Florida Cooperative Extension Service, Hurricanes and Tropical Storm Glossary (Terms You Need to Know), PalmBeachpost.com, Palm Beach County, FL, USA 2014. http://m.palmbeachpost.com/news/weather/hurricanes /hurricane-and-tropical-storm-glossary-1/nLj7s/, (ND/ Hurr Emr - Amer) {913}