An area of low pressure rapidly intensified once it moved east of the northern plains. This strengthening resulted in very strong northwest winds across the region. Some of the higher reported wind gusts include 77 mph at the Fort Pierre and Grand River RAWS sites, 74 mph at the Pierre airport, and 70 mph at Murdo, Presho and Hayes public observation sites.

High Wind in MCPHERSON, SOUTH DAKOTA
From 17-OCT-12 12:15:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 37.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The site also reported a peak wind gust to 63 mph at 1215 pm CST the next day.

High Wind in LYMAN, SOUTH DAKOTA
From 17-OCT-12 13:59:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The winds were sustained at 50 mph with gusts to 77 mph at the Ft. Pierre RAWS site.

High Wind in DEWEY, SOUTH DAKOTA
From 17-OCT-12 18:52:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The peak wind gust of 68 mph was recorded at the Bear Creek RAWS site.

High Wind in CORSON, SOUTH DAKOTA
From 17-OCT-12 19:06:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The peak wind was measured at the Grand River RAWS mesonet site.

High Wind in CORSON, SOUTH DAKOTA
From 18-OCT-12 07:33:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The peak wind was measured at the McIntosh SDSU observation site.

High Wind in HAND, SOUTH DAKOTA
From 18-OCT-12 07:55:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The peak wind was measured at the Miller superawos.

High Wind in STANLEY, SOUTH DAKOTA
From 18-OCT-12 09:06:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The peak wind was measured at the Hayes airport.

High Wind in LYMAN, SOUTH DAKOTA
From 18-OCT-12 11:15:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The peak wind was measured at the Oacoma SDSU observation site.

High Wind in FAULK, SOUTH DAKOTA
From 18-OCT-12 12:35:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The peak wind was measured at the Faulkton superawos.

High Wind in SULLY, SOUTH DAKOTA
From 18-OCT-12 15:15:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The peak wind was measured at the Onida superawos.

High Wind in JONES, SOUTH DAKOTA
From 17-OCT-12 10:00:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in DEWEY, SOUTH DAKOTA
From 17-OCT-12 11:20:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in LYMAN, SOUTH DAKOTA
From 17-OCT-12 12:40:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in CAMPBELL, SOUTH DAKOTA
From 17-OCT-12 13:00:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 37.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

There was also a peak gust to 52 mph reported at the site.

High Wind in HUGHES, SOUTH DAKOTA
From 17-OCT-12 13:43:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The visibility was reduced to 1 to 2 miles at times due to blowing dust.

High Wind in FAULK, SOUTH DAKOTA
From 17-OCT-12 14:45:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 38.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in EDMUNDS, SOUTH DAKOTA
From 17-OCT-12 15:00:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in LYMAN, SOUTH DAKOTA
From 17-OCT-12 17:00:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in WALWORTH, SOUTH DAKOTA
From 17-OCT-12 19:04:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in POTTER, SOUTH DAKOTA
From 17-OCT-12 20:35:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in HUGHES, SOUTH DAKOTA
From 18-OCT-12 02:32:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in HYDE, SOUTH DAKOTA
From 18-OCT-12 06:15:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The site also reported a peak gust to 57 mph.

High Wind in SULLY, SOUTH DAKOTA
From 18-OCT-12 07:07:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in BUFFALO, SOUTH DAKOTA
From 18-OCT-12 07:43:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in HAND, SOUTH DAKOTA
From 18-OCT-12 08:41:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in FAULK, SOUTH DAKOTA
From 18-OCT-12 10:00:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

High Wind in LYMAN, SOUTH DAKOTA
From 18-OCT-12 13:20:00 to 18-OCT-12 18:00:00 (CST-6)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in BROWN, SOUTH DAKOTA
From 18-OCT-12 07:28:00 to 19-OCT-12 00:00:00 (CST-6)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet