Selected United States La Niņa Winter Impacts

for Temperature and Precipitation

Mean seasonal snowfall (November - March 1948 through 1993) in inches for selected East Coast cities. Blue bars are for moderate-strong La Niņa years, black bars are for Neutral years, red bars are for moderate-strong El Niņo years.

Mean seasonal snowfall (November - March 1948 through 1993) in inches for selected mountain stations in the northwest U.S. Blue bars are for moderate-strong La Niņa years, black bars are for Neutral years, red bars are for moderate-strong El Niņo years.

Mean seasonal snowfall (November - March 1948 through 1993) in inches for selected cities in the northwest U.S. Blue bars are for moderate-strong La Niņa years, black bars are for Neutral years, red bars are for moderate-strong El Niņo years.

Mean seasonal snowfall (November - March 1948 through 1993) in inches for selected cities in the central U.S. Blue bars are for moderate-strong La Niņa years, black bars are for Neutral years, red bars are for moderate-strong El Niņo years.

Mean number of days per season (November - March 1948 through 1993) in which precipitation exceeded 0.50 inches for Neutral years (top). Lower left map is the difference in this quantity between El Niņo years and Neutral years. Lower right map is the difference in this quantity between La Niņa years and Neutral years. Data are analyzed on a 2^o latitude x 22^o longitude grid.

Mean seasonal snowfall (November - March 1948 through 1993) in inches for Neutral years (top). Lower left map is the difference in snowfall between El Niņo years and Neutral years. Lower right map is the difference in snowfall between La Niņa years and Neutral years. Data are analyzed on a 2^o x 2^o grid.

Mean number of days per season (November - March 1948 through 1993) with 2 inch daily snowfalls (or greater) for Neutral years (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid.

Mean number of days per season (December - February 1948 through 1993) in which maximum daily temperature is at least 5^o C above the daily climatological mean (1948-1993) value (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean.

Mean number of days per season (December - February 1948 through 1993) in which maximum daily temperature is at least 5^o C below the daily climatological mean (1948-1993) value (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean to smooth out variations caused by the relatively short base period.

Mean number of days per season (December - February 1948 through 1993) in which minimum daily temperature is at least 5^o C above the daily climatological mean (1948-1993) value (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean.

Mean number of days per season (December - February 1948 through 1993) in which minimum daily temperature is at least 5^o C below the daily climatological mean (1948-1993) value (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean.

Mean number of days per season (December - February 1948 through 1993) in which maximum daily temperature is below freezing (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean.

Mean number of days per season (December - February 1948 through 1993) in which minimum daily temperature is below freezing (top). Difference in number of days between Neutral years and moderate to strong El Niņo years (lower left). Lower right panel similar to lower left, except for La Niņa years. Data are analyzed on a 22^o x 22^o grid. Daily climatology is a 7-day running mean.