Autumn can be quick and fickle in the Wyoming high country, best not to let the calendar fool ya. The National Weather Service has issued a Freeze Warning for parts the Snowy Range in southern Wyoming. This includes the cities of Centennial and Albany, Wyoming.

The Warning is in effect from 10:00 PM Wednesday (September 11) until 8:00 AM Thursday.

Here's the text from the National Weather Service:

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
325 PM MDT Wed Sep 11 2019

...FREEZE WARNING FOR SNOWY RANGE THIS EVENING THROUGH THURSDAY
MORNING...

WYZ114-121400-
/O.CON.KCYS.FZ.W.0001.190912T0400Z-190912T1400Z/
Snowy Range-
Including the cities of Centennial and Albany
325 PM MDT Wed Sep 11 2019

...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
8 AM MDT THURSDAY...

* TIMING...10 PM MDT Wednesday evening through 8 AM MDT Thursday
  morning.

* TEMPERATURE...Overnight temperatures will drop between 26 and
  32 degrees Fahrenheit.

* IMPACTS...Crops and other sensitive vegetation may die due to
  the sub-freezing temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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