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Hurricane Season Fast Facts

Here's a look at what you need to know about the Atlantic hurrican...

Posted: May 7, 2018 1:53 PM
Updated: May 7, 2018 1:53 PM

Here's a look at what you need to know about the Atlantic hurricane season, which runs from June 1 to November 30.

Facts:
The National Oceanic and Atmospheric Administration defines a hurricane as "an intense tropical weather system with well-defined circulation and sustained winds of 74 mph (64 knots) or higher." In the western Pacific Ocean, hurricanes are called typhoons while similar storms in the Indian Ocean are called cyclones.

The peak of the Atlantic season is from mid-August to late October.

Hurricanes are rated according to intensity on the Saffir-Simpson Hurricane Wind Scale.

The 1-5 scale estimates potential property damage.

A Category 3 or higher is considered a major hurricane.

A hurricane watch indicates the possibility that a region could experience hurricane conditions within 48 hours.

A hurricane warning indicates that tropical-storm-force winds of at least 74 mph are expected within 36 hours.

Hurricane Development:
There are four stages of development: tropical disturbance, tropical depression, tropical storm, tropical cyclone (hurricane).

Tropical disturbance: Cloud columns develop into a cluster of thunderstorms.

Tropical depression: Thunderstorms intensify, with maximum sustained winds of 38 mph.

Tropical storm: Maximum sustained winds are between 39-73 mph. During this time, the storm becomes more circular in shape, with winds swirling around a calm center, known as the eye. This is when the storm is named.

Tropical cyclone (hurricane): Wind speeds reach 74 mph. The storm is at least 50,000 feet high and 125 miles across, rotating around an eye that spans 5-30 miles wide.

Hurricane categories:
Category 1: Minimal hurricane
Winds 74-95 mph.

Storm surge 3-5 feet.

No significant damage to buildings. Damage primarily to unanchored homes, shrubbery and trees.

Some damage to poorly constructed signs and coastal road flooding with minor pier damage.

Damage to power lines and poles could result in power outages lasting several days.

Category 2: Moderate hurricane
Winds 96-110 mph.

Storm surge 6-8 feet.

Some damage to buildings, mainly roofs, doors and windows. Considerable damage to shrubbery and trees with some trees blown down. Major damage to mobile homes. Extensive damage to poorly constructed signs and considerable damage to piers.

Small craft in unprotected anchorages may break moorings.

Power outages could last from several days to weeks.

Category 3: Extensive hurricane
Winds 111-130 mph.

Storm surge 9-12 feet.

Some structural damage to small buildings. Many large trees blown down. Rampant destruction of mobile homes in storms ranked category 3 or higher. Serious coastal flooding, damaging or destroying structures along the water.

Evacuation of low-lying residences within several blocks of the shoreline may be required.

Electricity and water may be unavailable for several days to a few weeks.

Category 4: Extreme hurricane
Winds 131-155 mph.

Storm surge 13-18 feet.

Extensive building damage to windows and doors as well as roof collapse in some small residences. Shrubs, trees and signs are blown down. Major damage to lower floors of buildings near coastline due to flooding, battering waves and floating debris. Major beach erosion.

Power outages could last from weeks to possibly months. Areas may be uninhabitable for weeks or months.

Category 5: Catastrophic hurricane
Winds greater than 155 mph.

Storm surge higher than 18 feet.

Complete roof failure on many residences and industrial buildings. Widespread destruction of structures less than 15 feet above sea level within 500 yards of shore. Low-lying evacuation routes cut off by rising water 3 to 5 hours before hurricane center arrives.

Advance evacuation of residential areas on low ground within 5-10 miles of the shoreline may be required.

Power outages could last for months. Area may remain uninhabitable for months.

Names:
There are ten regional lists of names worldwide: Atlantic, Eastern North Pacific, Central North Pacific, Western North Pacific/South China Sea, Australian Region, Nadi, Port Moresby, Jakarta, Southwest Indian Ocean and Northern Indian Ocean.

Using women's names for Atlantic storms was the practice until 1979, when male names were added to the mix.

The World Meteorological Organization's Hurricane Committee creates lists of hurricane names that are recycled every six years.

Names associated with storms that have caused significant death and/or damage are retired from the list. After an active 2017 hurricane season, NOAA announced the names Harvey, Irma, Maria and Nate were being retired. Other names that have been removed include Camille (1969), Andrew (1992), Opal (1995), Floyd (1999), Ivan (2004), Katrina (2005), Ike (2008) and Sandy (2012). Once a name is removed, another name replaces it.

Oregon Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 30801

Reported Deaths: 526
CountyConfirmedDeaths
Multnomah6818130
Marion444790
Washington428958
Umatilla291341
Clackamas225661
Malheur152723
Jackson10394
Lane96415
Deschutes76912
Yamhill73814
Jefferson5138
Polk50215
Morrow4886
Lincoln47213
Linn46613
Union4352
Benton2856
Klamath2732
Hood River2450
Wasco2343
Douglas2093
Josephine1832
Columbia1541
Coos1380
Clatsop1170
Baker902
Crook601
Tillamook480
Lake280
Wallowa281
Curry270
Sherman180
Harney120
Gilliam80
Grant80
Unassigned00
Wheeler00

California Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 786168

Reported Deaths: 15016
CountyConfirmedDeaths
Los Angeles2607976353
Riverside566811153
San Bernardino52471908
Orange520631128
San Diego44577760
Kern31379354
Fresno27668355
Sacramento21297375
Alameda20558374
Santa Clara20410296
San Joaquin19793414
Stanislaus16319335
Contra Costa15837199
Tulare15599256
Ventura12328143
Imperial11558314
San Francisco1074599
San Mateo9522143
Monterey946767
Santa Barbara8862110
Merced8750134
Kings728377
Sonoma7060114
Marin6557112
Solano608555
Madera429658
Placer346641
San Luis Obispo336927
Butte274835
Yolo274754
Santa Cruz22188
Sutter164210
Napa161413
San Benito130111
Yuba11187
El Dorado10684
Mendocino84918
Lassen7310
Shasta68714
Glenn5503
Colusa5096
Nevada5066
Tehama4984
Humboldt4826
Lake46510
Calaveras31114
Amador28616
Tuolumne2214
Inyo18714
Mono1652
Siskiyou1610
Del Norte1361
Mariposa752
Plumas490
Modoc240
Trinity150
Sierra60
Alpine20
Unassigned00
Medford
Clear
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Brookings
Overcast
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Hi: 64° Lo: 54°
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Crater Lake
Clear
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Grants Pass
Clear
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Klamath Falls
Clear
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