The National Weather Service mission
The National Weather
Service provides weather, hydrologic, and climate forecasts and
warnings for the United States, its territories, adjacent waters and
ocean areas, for the protection of life and property and the
enhancement of the national economy. The NWS is the sole United
States official voice for issuing warnings during
life-threatening weather situations.
Hazardous weather impacts
due to tornadoes have decreased from more than 110 per year in
the 1950s through the 1970s to 57 per year since the
implementation of Doppler radar in 1995 at more than 120
National Weather Service offices across the country.
On average, the
most weather-related fatalities over the past 30 years have been
attributed to floods, with an average of 107; followed by
lightning, 66; and tornadoes, 65.
Central and southeast Illinois severe weather statistics
In 2006, nearly 83
percent of all severe weather events -- damaging winds,
tornadoes and large hail -- in central Illinois had advance
warning by the National Weather Service in Lincoln, with an
average lead time of 18 minutes.
radar has been installed at the National Weather Service office
in Lincoln, nearly 83 percent of all severe weather events have
had advance warning, with an average lead time of 17 minutes for
the period from January 1996 through December 2006.
This is a 30
percent improvement in accuracy and a five-minute increase in
average lead time over the previous 10-year period, January
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Of the 15 counties
in Illinois with the most tornadoes, 11 are in central or
eastern Illinois. These are Logan, No. 1; Macon, No. 2; McLean,
No. 3; Sangamon, No. 4; Woodford, No. 6; Tazewell, No. 7;
Champaign, No. 10; Piatt, No. 12; Douglas, No. 13; Coles, No.
14; and Mason, No. 15. (Data based on tornadoes from 1950 to
2006, normalized to 1,000 square miles)
More than 2,300
volunteer weather spotters were trained in 26 central and
eastern Illinois counties last year. About 700 were new
Economic impacts of weather forecasts and warnings
Service implementation of storm-based warnings for smaller areas
and portions of counties will result in a 70 percent reduction
in false alarms. It is projected that this improvement will save
businesses and the public in the United States nearly $100
million in sheltering costs each year (e.g., lost business, lost
33 percent of the
United States gross domestic product, or nearly $3 trillion, is
affected by weather and NOAA's National Weather Service
The average U.S.
household pays only about $1.08 per month for NOAA's weather
damage from tornadoes, hurricanes and floods in the U.S. is
estimated that improved El Nino forecasts have resulted in
annual savings of nearly $300 million for U.S. agriculture by
altering planting decisions.
www.weather.gov/lincoln for the latest weather and river
forecasts, warnings, current conditions, radar and satellite
imagery, and climate information.
[Text from file received from the
National Weather Service,
PDF file) [To download Adobe Acrobat Reader for the PDF
file, click here.]