On Sunday afternoon, forecasters updated the 24-hour snow/sleet accumulation map to a "significant" impact with 2 to 4 inches predicted in a band from Pawnee through Creek, Okmulgee, Tulsa, Cherokee, and Adair counties.
A band of counties from Osage, Washington, Rogers, Nowata, Craig, Mayes, and Delaware may see even greater amounts, up to 6 inches.
The timing for the event has been pushed back somewhat, coming into eastern Oklahoma late into the night. Elevated road surfaces may become hazardous in the Tulsa area starting around 9 to 10 p.m.
"Initially, the precipitation will be light and widely scattered," said WARN Team Meteorologist Mike Grogan.
As the temperature falls and the cold front advances, we can expect a full-blown wintry mix, he said. There is a chance Tulsa will have minor icing - less than a quarter of an inch, but the window of time for freezing rain will be less than that for sleet or snow, according to Grogan.
Read Mike Grogan's Weather Blog
An Oklahoma Department of Transportation spokesperson said crews are on hand with 42 trucks and 9,000 tons of salt and sand ready to go.
Go to the Department of Public Safety website for Oklahoma highway conditions or call 405-425-2385.
Arkansas road conditions are available at 800-245-1672.
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