Hurricane Categories: Strengths and Impacts
Transcription
Hurricane Categories: Strengths and Impacts
Hurricane Season is Here Right Now - Be Informed and Ready June 30th - July 6th, 2016 Page 8 A hurricane is a severe tropical storm that forms in the southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico or eastern Pacific Ocean. To form, hurricanes need warm tropical oceans, moisture and light winds. They gather heat and energy from the warm waters. Evaporation from seawater increases their power. Hurricanes rotate in a counterclockwise direction around an "eye." They have winds at least 75 mph. When they come onto land, they can bring heavy rain, strong winds and floods, and can damage buildings, trees and cars. They also produce heavy waves called storm surge. Storm surges are very dangerous and a major reason why people must stay away from the ocean during a hurricane warning. Hurricanes need not make landfall or move directly across Virginia to cause great damage. The eye of Hurricane Gloria in September 1985 passed 45 miles east of Cape Henry. She was a category 3 hurricane with wind gusts to 104 mph. Damage to eastern Virginia was $5.5 million. The fastest wind ever recorded in Virginia was 134 mph from a hurricane in September 1944 at Cape Henry. Winds gusted up to 150 mph, though the storm stayed just offshore. Fast-moving inland storms such as Hurricane Hazel in October 1954 maintained hurricane force winds after making landfall. Winds gusted to 130 mph in Hampton and 100 mph in Richmond and Fairfax. Virginia lost 13 people, and statewide damage was conservatively estimated at $15 million. Eye: The eye is the calm center of a hurricane. Don't be fooled if wind and rain stop during a hurricane. You may just • • • • • • • be in the eye of the storm. Listen to the radio to find out when the storm has really passed. Floods: More people are killed by freshwater floods during a hurricane than by any other hazard. Never play in floodwater. In September 2003, Hurricane Isabel caused 32 deaths and approximately $1.9 billion in damages to homes, businesses and public facilities in Virginia, affecting 75 percent of the state. Yet, this deadly storm was only a Category 1 hurricane when it reached Virginia. Hurricanes aren’t the only tropical systems that warrant caution. Tropical Depression Gaston (2004) and Tropical Storms Jeanne (2004) and Floyd (1999) all caused major damage and prompted federal disaster declarations. Tropical depressions, tropical storms and hurricanes are low pressure areas that develop in the tropical regions of the ocean (between 20 degrees N latitude and the equator). These storms are masses of thunderstorms that organize and begin to rotate. These systems, in order of intensity, are called depressions (winds between 25 and 38 mph), tropical storms (winds between 39 and 73 mph) and hurricanes (winds of 74 mph or greater). A tropical depression, the lowest intensity, is given a number once it has a counterclockwise spin and winds of 38 mph or less. When wind speeds reach 39 mph and the storm is given a name from a pre-determined list, a tropical storm is born. While a tropical storm does not produce a high storm surge, its thunderstorms can still pack a dangerous and deadly punch. In 1972, Agnes was only a tropical storm when it dropped torrential rains that led to devastating floods in Pennsylvania, Maryland and Virginia. Sixteen people died in Virginia and damage was estimated at $222 million. A hurricane is the most intense tropical event, with five categories and winds ranging from 74 mph to 157 mph or greater. Storm surge is a major concern with hurricanes. The extremely high winds cause ocean water to pile up, creating higher than normal sea levels with waves up to 40 feet in open water. High sea levels and shallow waters can devastate a coastline and bring ocean water miles inland. A hurricane's bands of thunderstorms produce torrential rains and sometimes tornadoes. A foot or more of rain could fall in less than a day, causing flash floods and mudslides. Large rivers in the hurricane's path might still be flooding for days after the storm has passed. The storm's driving winds can topple trees, utility poles and damage buildings. Communication and electricity might be lost for days and roads are often impassable due to fallen trees and debris. What areas in Virginia are most vulnerable? Though it might seem that only the shoreline is vulnerable to the effects of hurricanes, all of Virginia can be affected by tropical systems. As we saw in 2004 with Tropical Depression Gaston and Tropical Storm Jeanne, even weakened storm systems can cause problems for inland areas. Both of these storms resulted in federal disaster declarations, loss of life and tremendous property damage. The 2015 Atlantic Hurricane Names Alex (January 13th) Bonnie (May 27th) Colin (June 5th) Danielle (June 19th) Earl Fiona Gaston • • • • • • • Hermine Ian Julia Karl Lis Matthew Nicole • • • • • • • Otto Paula Richard Shary Tobia Virginie Walter Watches & Warnings: Know The Meaning From The VA Dept. of Emergercy Management Hurricane/Typhoon Warning: An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are expected somewhere within the specified area in association with a tropical, subtropical, or post-tropical cyclone. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the warning is issued 36 hours in advance of the anticipated onset of tropical-storm-force winds (24 hours for the Western North Pacific). The warning can remain in effect when dangerously high water or a combination of dangerously high water and waves continue, even though winds may be less than hurricane force. • Hurricane Watch: An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are possible within the specified area in association with a tropical, subtropical, or post-tropical cyclone. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the hurricane watch is issued 48 hours in advance of the anticipated onset of tropical storm force winds. • Tropical Storm Warning: An announcement that sustained winds of 34 to 63 knots (39 to 73 mph or 63 to 118 km/hr) are expected somewhere within the specified area within 36 hours (24 hours for the Western North Pacific) in association with a tropical, subtropical, or post-tropical cyclone. • Tropical Storm Watch: An announcement that sustained winds of 34 to 63 knots (39 to 73 mph or 63 to 118 km/hr) are possible within the specified area within 48 hours in association with a tropical, subtropical, or posttropical cyclone • Hurricane Categories: Strengths and Impacts Hurricanes are rated on the Saffir-Simpson Hurricane Scale based on the storm's intensity. This 1 to 5 rating scale estimates potential property damage. Hurricanes reaching Category 3 and higher are considered major hurricanes because of potential for loss of life and damage, though Category 1 and 2 storms are still very dangerous and should not be taken lightly. Category 1: Winds of 74 to 95 mph Potential for minimal damage. Expect: Trees, shrubbery, foliage and unanchored mobile home damage. Lowlying coastal roads inundated, minor pier damage. Storm surge four to five feet above normal tide level. Category 2: Winds of 96 to 110 mph Potential for moderate damage. Expect: Considerable damage to shrubbery and trees, with some trees uprooted. Major damage to exposed mobile homes. Some damage to roofing materials. Coastal roads and low-lying escape routes inland cut by rising water two to four hours before arrival of hurricane center. Considerable damage to and flooding of piers and marinas. Evacuation of some shoreline homes in low-lying areas. Storm surge of six to eight feet above normal tide level. Category 3: Winds of 111 to 129 mph (96-112 kt, 178-208 km/h) Potential for extensive damage. Expect: Foliage torn from trees with some large trees blown down. Moderate damage to roofing materials, windows and doors. Some structural damage to small buildings, and mobile homes destroyed. Serious flooding at coast and many small structures near coast destroyed. Larger structures near coast damaged by waves and floating debris. Major erosion of beaches with low-lying escape routes inland cut by rising water three to five hours before hurricane center arrives. Evacuation of all residences within 500 yards of shore and singlestory homes on low ground within two miles of shore possible. Storm surge nine to 12 feet above normal tide level. Category 4: Winds of 130 to 156 mph (113-136 kt, 209-251 km/h) Potential for extreme damage. Expect: Shrubs, trees and signs blown down. Complete failure of roofs on small homes. Mobile homes destroyed. Flat terrain 10 feet or less above sea level flooded inland up to six miles. Major damage to lower floors of structures near shore due to flooding and floating debris. Major erosion of beaches. Low-lying escape routes inland cut by rising water three to five hours before hurricane center arrives. Evacuation of all homes up to 500 yards from shore and single-story homes on low ground up to two miles from shore possible. Storm surge 13 to 18 feet above normal tide level. Category 5: Winds greater than 157 mph (137 kt or higher, 252 km/h or higher) Potential for catastrophic damage. Expect: Shrubs and trees blown down, considerable damage to roofs. Mobile homes destroyed. Major damage to lower floors of all structures less than 15 feet above sea level within 500 yards of shore. Low-lying escape routes inland cut by rising water three to five hours before hurricane center arrives. Massive evacuation of residential areas on low ground within five to 10 miles of shore possibly required. Storm surge greater than 18 feet above normal tide level. Get Tech Ready for the 2016 Hurricane Season Page 9 June 30th - July 6th, 2016 According to The American Red Cross, the internet including online news sites and social media platforms is the third most popular way for Americans to gather emergency information and let their loved ones know they are safe. Through the use of everyday technology, individuals, families, responders and organizations can successfully prepare for, adapt to and recover from disruptions brought on by emergencies and/or disasters. With effective planning, it is possible to take advantage of technology before, during and after a crisis to communicate with loved ones and manage your financial affairs. You can use your cell phone’s text messaging capability to receive text message updates from FEMA (standard message and data rates apply). Here are basic commands to get started: To signup to receive monthly preparedness tips: text PREPARE to 43362 (4FEMA) To unsubscribe (at any time): text STOP to 43362 (4FEMA) STAY CONNECTED Keep your contacts updated across all of your channels, including phone, email and social media. This will make it easy to reach out to the right people quickly to get information and supply updates. Consider creating a group list serve of your top contacts. Learn how to send updates via text and internet from your mobile phone to your contacts and social channels in case voice communications are not available. Text messages and the internet often have the ability to work in the event of a phone service disruption. Keep extra batteries for your phone in a safe place or purchase a solar-powered or hand crank charger. These chargers are good emergency tools to keep your laptop and other small electronics working in the event of a power outage. If you own a car, purchase a car phone charger because you can charge your phone if you lose power at your home. Program "In Case of Emergency" (ICE) contacts into your cell phone so emergency personnel can contact those people for you if you are unable to use your phone. Let your ICE contacts know that they are programmed into your phone and inform them of any medical issues or other special needs you may have. If you have a traditional landline (nonbroadband or VOIP) phone, keep at least one non-cordless receiver in your home because it will work even if you lose power. If you are evacuated and have call-forwarding on your home phone, forward your home phone number to your cell phone number. If you do not have a cell phone, keep a prepaid phone card to use if needed during or after a disaster. Prepare a family contact sheet. This should include at least one outof-town contact that may be better able to reach From Ready.gov/get-tech-ready family members in an emergency. Have a batterypowered or handcranked radio or television available (with spare batteries). The following are additional tips when making phone calls and using your smartphone during or after a disaster: Keep all phone calls brief. If you need to use a phone, try to convey only vital information to emergency personnel and/or family. If you are unsuccessful in completing a call using your cell phone, wait ten seconds before redialing to help reduce network congestion. Conserve your cell phone battery by reducing the brightness of your screen, placing your phone in airplane mode, and closing apps you are not using that draw power, unless you need to use the phone. If you lose power, you can charge your cell phone in your car. Just be sure your car is in a well-ventilated place (remove it from the garage) and do not go to your car until any danger has passed. You can also listen to your car radio for important news alerts. If you do not have a hands-free device in your car, stop driving or pull over to the side of the road before making a call. Do not text on a cell phone, talk, or "tweet" without a hands free device while driving. Immediately following a disaster, resist using your mobile device to watch streaming videos, download music or videos, or play video games, all of which can add to network congestion. Limiting use of these services can help potentially life-saving emergency calls get through to 9-1-1. For non-emergency communications, use text messaging, email, or social media instead of making voice calls on your cell phone to avoid tying up voice networks. Data-based services like texts and emails are less likely to experience network congestion. You can also use social media to post your status to let family and friends know you are okay. In addition to Facebook and Twitter, you can use resources such as the American Red Cross's Safe and Well program. Your family may not be together when disaster strikes, so it is important to plan in advance. Create an Emergency Information Document (use Google Chrome) or Family Communication Plan for Parents and Kids (PDF - 1.2 Mb) to record how you will contact one another; how you will get back together; and what you will do in different situations. Make sure to share this document with family members, friends and co-workers who will also need to access it in an emergency or crisis. When handling personal and sensitive information always keep your data private and share it only with those who will need access in case of emergency. Sign up for Direct Deposit and electronic banking through your financial institution so you can access your payroll funds and make electronic payments regardless of location. Federal benefit recipients can sign up by calling (800) 333-1795 or at www.GoDirect.org. GET ORGANIZED Store your important documents such as personal and financial records in a passwordprotected area in the Cloud or a secure flash or jump drive that you can keep readily available. This flash drive can be kept on a key ring so it can be accessed from any computer, anytime, anywhere. Remember important documents, such as: • • • Personal and property insurance Identification: D r i v e r ' s license/passport (for family members, as well) Banking information Don't forget your pets! • • • Store your pet's veterinary medical records documents online. Consider an information digital implant. Keep a current photo of your pet in your online kit to aid in identification if you are separated. Local Storm Surge Maps Caring For Animals If you are like millions of animal owners nationwide, your pet is an important member of your household. Unfortunately, animals are also affected by disaster. The likelihood that you and your animals will survive an emergency such as a fire or flood, tornado or terrorist attack depends largely on emergency planning done today. Some of the things you can do to prepare for the unexpected, such as assembling an animal emergency supply kit and developing a pet care buddy system, are the same for any emergency. Whether you decide to stay put in an emergency or evacuate to a safer location, you will need to make plans in advance for your pets. Keep in mind that what's best for you is typically what's best for your animals. If you evacuate your home, DO NOT From Ready.gov LEAVE YOUR PETS BEHIND! Pets most likely cannot survive on their own and if by some remote chance they do, you may not be able to find them when you return. If you are going to a public shelter, it is important to understand that animals may not be allowed inside. Plan in advance for shelter alternatives that will work for both you and your pets; consider loved ones or friends outside of your immediate area who would be willing to host you and your pets in an emergency. Make a back-up emergency plan in case you can't care for your animals yourself. Develop a buddy system with neighbors, friends and relatives to make sure that someone is available to care for or evacuate your pets if you are unable to do so. Be prepared to improvise and use what you have on hand to make it on your own for at least three days, maybe longer. For additional information, please contact the Humane Society of the United States BELROI CHRISTENSONS CORNER York HAYES NORGE CLAY BANK BARLOWS CORNER SELDEN SKIMINO Storm Surge Inundation NAXERA WHITE MARSH Area Not Included LIGHTFOOT Category 1 OAKTREE EWELL CAMP PEARY Category 2 GLASS ORDINARY Category 3 SEVERN WICOMICO QUEENS LAKE ACHILLES Category 4 Interstates MARYUS Primary Routes U.S. NAVAL WEAPONS STATION GLOUCESTER POINT WILLIAMSBURG YORK TERRACE Addressed Roads CARVER GARDENS FIVE FORKS Jurisdiction Boundaries KINGS POINT LACKEY GROVE YORKTOWN JAMESTOWN 64 HORNSBYVILLE SEAFORD LEE HALL 17 0 NEWPORT NEWS GOLF COURSE HOG ISLAND GAME REFUGE GRAFTON DARE ORIANA FORT EUSTIS BACONS CASTLE POOLESVILLE DENBIGH OYSTER POINT MENCHVILLE TABB 2 3 Miles 60 CHIPPOKES STATE PARK 1 POQUOSON 4 5 6 YORKTOWN CRIER • THE POQUOSON POST, JUNE 30TH - JULY 6TH, 2016 Page 7