Figure 19.3

Cooperative Institute for Climate and Satellites - NC
Kenneth E. Kunkel

This figure appears in chapter 19 of the NOAA-led State Summaries 2017 report.

The observed number of very cold nights (annual number of days with minimum temperature below 0°F) for 1900–2014, averaged over 5-year periods; these values are averages from six long-term reporting stations. Periods of very cold nighttime temperatures have occurred episodically throughout the period of record. Since a period of above average number of very cold nights in the 1970s and 1980s, the observed number of such days has been below average, reflecting winter warming. The dark horizontal line is the long-term average (1900–2014) of 23.5 days per year. Source: CICS-NC and NOAA NCEI.

Free to use with credit to the original figure source.

The time range for this figure is January 01, 1900 (00:00 AM) to December 31, 2014 (00:00 AM).

This figure was created on April 13, 2015.

The spatial range for this figure is 43.0648° to 47.4598° latitude, and -66.9406° to -71.0843° longitude.

Provenance

This figure was derived from dataset Global Historical Climatology Network - Daily using the activity me-very-cold-nights-noaa-ncdc-ghcn-daily-process