Note – this article has been updated to reflect an expansion of the impacted area under a frost advisory.

Colder temperatures are coming to eastern Colorado Saturday night into Sunday morning according to the National Weather Service.

During the day Saturday, temperatures in the area are expected to be in the low 60s, slightly below normal, before dropping to the low 30s and upper 20s.

A frost advisory will be in effect from 3:00 and 8:00 a.m. Sunday. Frost is expected to develop as temperatures drop just below the freezing mark.

The advisory covers all or portions of the following Colorado counties

• Phillips
• Sedgwick
• Logan
• Weld
• Larimer
• Morgan
• Boulder
• Broomfield
• Adams
• Washington
• Yuma
• Jefferson
• Denver
• Arapahoe
• Douglas
• Elbert
• Lincoln
• Kit Carson
• Cheyenne
• El Paso
• Crowley
• Kiowa
• Prowers

Frost and freezing conditions could kill crops, and may damage outdoor plumbing and drip systems.

The frost advisory extends into Kansas and Nebraska.

The NWS encourages taking steps to protect tender plants from the cold.