Editorial Type:
Article
Article Type:
Research Article

Evaluation of the National Weather Service Extreme Cold Warning Experiment in North Dakota

Cindy H. Chiu National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia

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Sara J. Vagi National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia

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Amy F. Wolkin National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia

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John Paul Martin NOAA/National Weather Service/Weather Forecast Office, Bismarck, North Dakota

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Rebecca S. Noe National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia

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Print Publication:
01 Jan 2014
DOI:
https://doi.org/10.1175/WCAS-D-13-00023.1
Page(s):
22–31
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Abstract

Dangerously cold weather threatens life and property. During periods of extreme cold due to wind chill, the National Weather Service (NWS) issues wind chill warnings to prompt the public to take action to mitigate risks. Wind chill warnings are based on ambient temperatures and wind speeds. Since 2010, NWS has piloted a new extreme cold warning issued for cold temperatures in wind and nonwind conditions. The North Dakota Department of Health, NWS, and the Centers for Disease Control and Prevention collaborated in conducting household surveys in Burleigh County, North Dakota, to evaluate this new warning. The objectives of the evaluation were to assess whether residents heard the new warning and to determine if protective behaviors were prompted by the warning. This was a cross-sectional survey design using the Community Assessment for Public Health Emergency Response (CASPER) methodology to select a statistically representative sample of households from Burleigh County. From 10 to 11 April 2012, 188 door-to-door household interviews were completed. The CASPER methodology uses probability sampling with weighted analysis to estimate the number and percentage of households with a specific response within Burleigh County. The majority of households reported having heard both the extreme cold and wind chill warnings, and both warnings prompted protective behaviors. These results suggest this community heard the new warning and took protective actions after hearing the warning.

Corresponding author address: Rebecca S. Noe, National Center for Environmental Health, CDC, 4770 Buford Hwy., MS F-60, Atlanta, GA 30341. E-mail: rhn9@cdc.gov

Abstract

Dangerously cold weather threatens life and property. During periods of extreme cold due to wind chill, the National Weather Service (NWS) issues wind chill warnings to prompt the public to take action to mitigate risks. Wind chill warnings are based on ambient temperatures and wind speeds. Since 2010, NWS has piloted a new extreme cold warning issued for cold temperatures in wind and nonwind conditions. The North Dakota Department of Health, NWS, and the Centers for Disease Control and Prevention collaborated in conducting household surveys in Burleigh County, North Dakota, to evaluate this new warning. The objectives of the evaluation were to assess whether residents heard the new warning and to determine if protective behaviors were prompted by the warning. This was a cross-sectional survey design using the Community Assessment for Public Health Emergency Response (CASPER) methodology to select a statistically representative sample of households from Burleigh County. From 10 to 11 April 2012, 188 door-to-door household interviews were completed. The CASPER methodology uses probability sampling with weighted analysis to estimate the number and percentage of households with a specific response within Burleigh County. The majority of households reported having heard both the extreme cold and wind chill warnings, and both warnings prompted protective behaviors. These results suggest this community heard the new warning and took protective actions after hearing the warning.

Corresponding author address: Rebecca S. Noe, National Center for Environmental Health, CDC, 4770 Buford Hwy., MS F-60, Atlanta, GA 30341. E-mail: rhn9@cdc.gov
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