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Winter Blizzard

Winter Blizzard

A blizzard is a severe snowstorm characterized by strong winds and low temperatures. The difference between a blizzard and a snowstorm is the strength of the wind: sustained winds or frequent gusts that are greater than or equal to 56 km/h (35 mph) with blowing or drifting snow which reduces visibility to 400 meters or a quarter mile or less.

 

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Ceev Xiong

Ceev Xiong

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If stranded in the car in the blizzard, use the standard U.S. distress signal, a repetition of any three long blasts, whistle blows, horn honks, or headlight flashes. Make the three of equal length and repeat every few minutes.

Article:   National Geographic Compl…
Source:  Offline Book/Journal
Ceev Xiong

Ceev Xiong

42 Knowledge Cards 

I believe the distress signal is the international Morse code distress signal, S.O.S.

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Dress in warm layers and wear insulated boots, hat, and gloves. Cover your mouth when outside to protect your lungs from subfreezing air. If hypothermia presents, strip off wet clothing, and wrap in dry, warm fabrics.

Article:   National Geographic Compl…
Source:  Offline Book/Journal
Ceev Xiong

Ceev Xiong

42 Knowledge Cards 

The important part of the human body is the core, the body minus the arms and legs.  Warm that part first by giving warm drinks and seek medical assistant.  Also, avoid overexertion when shoveling snow as one may succumb to health risk.

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Frostbite is indicated when the affected areas turn pale or white and lose feeling...When a person's core body temperature drops below 35 degrees Celsius (95 degrees Fahrenheit), the person is experiencing hypothermia. Symptoms include uncontrollable shivering, drowsiness, disorientation, slurred speech, and exhaustion.

Article:   Natural Hazards and Disas…
Source:  Offline Book/Journal
Ceev Xiong

Ceev Xiong

42 Knowledge Cards 

Under these circumstances, one must seek immediate medical attention.  Victims should be warmed slowly.

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In Omaha, Nebraska, utility crews struggled overnight -- sometimes in near whiteout conditions -- to restore power to 38,500 customers left in the dark by the storm, according to the Omaha Public Power District.

Article: Blizzard blasts upper Mid...
Source: CNN.com
Ceev Xiong

Ceev Xiong

42 Knowledge Cards 

Today, December 20, 2012, is the day when the U.S. was finally hit by a blizzard.  An advice that we should all follow is to be patience and void unnecessary accidents that can be prevented.

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The storm -- the first blizzard of the season -- made travel treacherous throughout the region. Nebraska authorities closed much of snow-packed Interstate 80 through the state Thursday morning as blowing snow dangerously reduced visibility.

Article: Blizzard blasts upper Mid...
Source: CNN.com

Vegetation plays a large role in snow distribution patters; it interacts with snow through interception, by retaining blowing snow, and by reducing sublimation losses due to blowing snow. Vegetation can accelerate or delay snow-melt depending on canopy characteristics and the amount of incoming energy.

Article:   Encyclopedia of Snow, Ice…
Source:  Offline Book/Journal
Ceev Xiong

Ceev Xiong

42 Knowledge Cards 

In this source, "snow affects [the] ecosystem structure and function, including the distribution of vegetation in landscapes."  Although the snow may have melted from surrounding areas, the vegetation that is still covered in snow will affect its growth.

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There are four terms that describe the intensity of snowfall:

1. Snow flurry refers to light showers of snow that do not cover large areas and do not fall steadily for long periods of time.

2. Freezing rain is precipitation that cools below 0 degrees Celsius (32 degrees Fahrenheit), but does not turn to ice in the air. The water is supercooled. When the drops hit anything they instantly turn into ice.

3. Ice storm is a storm with large amounts of freezing rain that coats trees, power lines and roadways with ice.

4. A blizzard is a severe winter storm that packs a combination of snow and wind, resulting in very low visibility. Officially, the National Weather Service defines a blizzard as large amounts of falling or blowing snow with winds in excess of 56 kilometers (35 miles) per hour and visibilities of less than 0.40 kilometers (0.25 miles) for more than 3 hours.

Article: National Snow and Ice Dat...
Source: All About Snow, Snow and ...

Forecasters also rate the expected severity of blizzards and other snowy weather using a scale:


1.) A Winter Weather Advisory is issued for accumulations of snow, freezing rain, freezing drizzle, and sleet that may present a hazard but does not merit a warning.

2.) A Winter Storm Watch is issued to alert the public to the possibility of a blizzard, heavy snow, heavy freezing rain, or heavy sleet.

3.) A Winter Storm Warning is issued when a hazardous winter weather event is imminent or occurring, and is considered a threat to life and property.

Article: National Snow and Ice Dat...
Source: All About Snow, Snow and ...

Starting with a germ of ice, a snow crystal develops by sublimation and deposition, sometimes with the added freezing of surrounding water droplets...The snow crystals continue [to grow until] they have obtained this 'critical' mass [and] fall, more or less joined into snowflakes.

Article:   Understanding, testing an…
Source:  Offline Book/Journal

Snow is commonly formed when water vapor changes directly to ice without first becoming a liquid, this process is known as deposition.

When temperatures of less than 32°F are at the higher altitude in the atmosphere the ice crystals are created.

Article: Hot Topics
Source: How is snow formed? | New...
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