During the morning of Sunday, December 9th, an inverted trough across eastern Minnesota, and a surface low over southwest Minnesota, combined and then intensified as the main surface low developed across the southern Great Lakes.  The tight pressure gradient, along with ample new snow on the ground, caused blizzard conditions to develop across portions of west-central Minnesota, and along the Minnesota River Valley. Surface winds increased to over 25 mph, with gusts over 40 to 45 mph by the late morning. These winds continued through the mid to late afternoon hours before decreasing during the evening. The combination of sustained winds of 25 to 35 mph, with frequent gusts over 40 mph, caused white-out conditions. Some observers noted that they could not see more than a half block during the height of the storm.

Blizzard in KANDIYOHI, MINNESOTA
From 09-DEC-12 12:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the southwestern part of the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in DOUGLAS, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observers reported near zero visibilities in the southwestern half of the county during the afternoon. The winds began to subside during the late afternoon, with much better conditions by 6 pm.

Blizzard in LAC QUI PARLE, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 30 mph sustained, with frequent gusts over 45 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in POPE, MINNESOTA
From 09-DEC-12 12:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the southwestern part of the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in REDWOOD, MINNESOTA
From 09-DEC-12 12:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in RENVILLE, MINNESOTA
From 09-DEC-12 12:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the southwestern part of the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in SWIFT, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in STEVENS, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in YELLOW MEDICINE, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 30 mph sustained, with frequent gusts over 45 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.

Blizzard in CHIPPEWA, MINNESOTA
From 09-DEC-12 10:00:00 to 09-DEC-12 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

During the late morning, and early afternoon, wind speeds increased to over 25 to 30 mph sustained, with frequent gusts over 35 mph. Local observations, and individuals in the county reported near zero visibilities at times. The winds began to subside during the evening, with much better conditions by 9 pm.