Frost Advisory-Parts of North, Cntrl & Wstrn OK
The NWS's Norman weather office has issued a Frost Advisory for parts of northern, central and western Oklahoma. It is in effect from Saturday evening through Sunday morning. Temperatures in the affected counties are forecast to drop as low as 32 to 36 degrees. Remember that in certain conditions, frost can form at temperatures in the upper 30s.
You can see the affected counties highlighted in blue on the county map on the linked page. To see the text of the Frost Advisory, click on any county in the watch area and that county's page will include a link to the text of any applicable watches, warnings, advisories or special weather statements.
Here is a link that might be useful: Webpage of NWS-Norman Weather Office