The Cheyenne Office of the National Weather Service has upgraded a freeze watch to a Freeze Warning for much of eastern Wyoming and the Nebraska Panhandle. The warning is in effect from midnight until 9:00 AM on Thursday. The Warning includes the cities of Cheyenne and Laramie.

From the National Weather Service:

"A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation.

Take steps now to protect tender plants pets and livestock from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above-ground pipes to protect them from freezing."

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
116 PM MDT Wed Oct 2 2019

...Freeze Warning Late Tonight and Thursday Morning...

.Clearing skies and light winds will allow temperatures to plummet
overnight with a widespread frost and freeze expected as low
temperatures dip into the middle 20s to near 30 degrees.

116 PM MDT Wed Oct 2 2019

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT
THURSDAY...

The National Weather Service in Cheyenne has issued a Freeze
Warning, which is in effect from midnight tonight to 9 AM MDT
Thursday. The Freeze Watch is no longer in effect.

* WHAT...Sub-freezing temperatures as low as 25 or 26 degrees.

* WHERE...Portions of east central, south central and southeast
  Wyoming and western Nebraska.

* WHEN...From midnight tonight through 9 AM Thursday morning.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing. Sensitive pets or livestock may experience hazardous
  temperatures.