Arctic air had spread into eastern Oklahoma and northwestern Arkansas on the 8th, and gradually deepened across the region. Precipitation began as freezing drizzle across the area on the 8th, with ice accumulation up to .25 of an inch reported in some areas, as the freezing drizzle persisted for 24 to 48 hours. As the cold air deepened, the freezing drizzle became periods of snow flurries and light snow. This was especially true in areas downwind of some of the lakes in northeastern Oklahoma. Lake effect snow produced up to 1.5 inch accumulations in some areas, a rare occurrence indeed for this region.
A strong storm system translated into the Southern Plains from the Southern Rockies on the 14th and 15th. Heavy snow began across the area with the approach of the main storm system during the early morning hours of the 14th. Several rounds of widespread heavy snow produced four to eight inches of accumulation, as the snow continued into the early afternoon hours of the 15th in some areas as the storm system moved away from the region. The heaviest snow fell in a swath along and south of I-44, and north of I-40, across portions of Okfuskee, Creek, Okmulgee, Tulsa, Wagoner, Rogers, Mayes, Cherokee, and Delaware Counties.
In addition to the heavy snow, much of eastern Oklahoma experienced excessively cold wind chill from the 14th through the 16th. Temperatures fell below zero across the area on 15th and 16th, and wind chill values were as low as -20 to -30 degrees.

Winter Storm in OKMULGEE, OKLAHOMA
From 14-FEB-21 04:00:00 to 15-FEB-21 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in WAGONER, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in CHEROKEE, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in ADAIR, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in MUSKOGEE, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in MCINTOSH, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in SEQUOYAH, OKLAHOMA
From 14-FEB-21 07:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in PITTSBURG, OKLAHOMA
From 14-FEB-21 04:00:00 to 15-FEB-21 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in HASKELL, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in LATIMER, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in LE FLORE, OKLAHOMA
From 14-FEB-21 07:00:00 to 15-FEB-21 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in OSAGE, OKLAHOMA
From 14-FEB-21 02:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in WASHINGTON, OKLAHOMA
From 14-FEB-21 02:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in NOWATA, OKLAHOMA
From 14-FEB-21 04:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in CRAIG, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in OTTAWA, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in PAWNEE, OKLAHOMA
From 14-FEB-21 02:00:00 to 15-FEB-21 09:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in TULSA, OKLAHOMA
From 14-FEB-21 04:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in ROGERS, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in MAYES, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in DELAWARE, OKLAHOMA
From 14-FEB-21 05:00:00 to 15-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in CREEK, OKLAHOMA
From 14-FEB-21 03:00:00 to 15-FEB-21 09:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in PUSHMATAHA, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in CHOCTAW, OKLAHOMA
From 14-FEB-21 06:00:00 to 15-FEB-21 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in OKFUSKEE, OKLAHOMA
From 14-FEB-21 04:00:00 to 15-FEB-21 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations