A strong, shallow cold front pushed through pulling temperatures below freezing. With abundant moisture in the area, widespread showers developed post-frontal and slowly moved off eastward on the 20th. The tail end of these showers was behind the freezing line, resulting in freezing rain and sleet. A second round of showers developed post-frontal on the 21st under the influence of isentropic lift. With the cold air firmly in place, most of the precipitation that fell was either freezing rain or sleet (sleet was fairly widespread across the area). Yet, a third round of precipitation developed on the 22nd. Subfreezing temperatures persisted into early afternoon allowing more freezing rain and sleet to fall.
Despite efforts to gather reports, this event likely has data gaps. Beginning and ending times for events are estimates and include all three rounds of winter precipitation. It should also be noted that throughout this whole time period, even small accumulations from freezing drizzle caused fairly widespread travel impacts.

Ice Storm in MCCLAIN, OKLAHOMA
From 20-FEB-18 09:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A quarter inch of ice on branches was reported at 2:35pm on the 20th. Freezing rain and sleet continued to fall in waves through the 22nd, though no additional accumulation was reported.

Winter Weather in GARFIELD, OKLAHOMA
From 20-FEB-18 07:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A number of accidents were reported on the 20th due to freezing drizzle / freezing rain.

Winter Weather in KAY, OKLAHOMA
From 20-FEB-18 07:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A number of accidents were reported on the 20th due to freezing drizzle / freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported.

Ice Storm in COMANCHE, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Utility Company

About 1200 power outages were reported on the 21st due to freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported. One inch of sleet accumulation was reported on the 22nd.

Ice Storm in BRYAN, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Utility Company

About 700 power outages were reported on the 21st and 2300 outages on the 22nd due to freezing rain. Freezing rain and sleet had fallen in waves from the 20th through the 22nd, though no other impacts were reported.

Ice Storm in POTTAWATOMIE, OKLAHOMA
From 20-FEB-18 09:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: NWS Employee

A quarter inch of ice on branches was reported at 3:00pm and then 0.35 inches at 3:30pm on the 20th. Freezing rain and sleet continued to fall in waves through the 22nd, though no additional accumulation was reported. Around 1300 power outages were reported on the 20th and around 1100 power outages were reported on the 22nd.

Ice Storm in GARVIN, OKLAHOMA
From 20-FEB-18 09:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Storm Chaser

About 0.4 inches of ice on branches was reported at 4:30pm on the 21st. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no additional accumulation was reported. Broken branches were reported.

Winter Weather in CANADIAN, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A number of accidents were reported on the 20th due to freezing drizzle / freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported.

Winter Weather in OKLAHOMA, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A number of accidents were reported on the 20th due to freezing drizzle / freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported. 0.5 inches of sleet was reported on the 21st.

Ice Storm in JOHNSTON, OKLAHOMA
From 20-FEB-18 09:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Trained Spotter

About 0.25 inches of ice on branches was reported at 3:20pm on the 21st. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no additional accumulation was reported. About 900 power outages were reported on the 21st and 700 on the 22nd.

Ice Storm in CADDO, OKLAHOMA
From 20-FEB-18 09:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Broadcast Media

About 0.25 inches of ice on branches was reported at 10am on the 22nd. Freezing rain and sleet had fallen in waves from the 20th through the 22nd.

Winter Weather in GRADY, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Emergency Manager

A number of accidents were reported on the 20th due to freezing drizzle / freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported.

Winter Weather in MARSHALL, OKLAHOMA
From 20-FEB-18 10:00:00 to 22-FEB-18 14:00:00 (CST-6)
Reported by: Utility Company

About 850 power outages were reported on the 21st due to freezing rain. Freezing rain and sleet continued to fall in waves from the 20th through the 22nd, though no other impacts were reported. 0.15 inches of ice accumulation was reported on the 21st.