An unseasonably strong low pressure system moved across the Great Basin and produced high wind and dust over northern Arizona.

High Wind in MARBLE CANYON AND GLEN CANYON, ARIZONA
From 28-MAY-11 23:30:00 to 29-MAY-11 04:30:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The RAWS at House Rock reported wind gusts in excess of 60 MPH for several hours during the night.

High Wind in EASTERN MOGOLLON RIM, ARIZONA
From 29-MAY-11 12:00:00 to 29-MAY-11 21:00:00 (MST-7)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The RAWS at Limestone Canyon reported high wind gusts from about noon to 9 PM MST.
A spotter in Linden reported a peak wind gust of 59 MPH.

High Wind in WHITE MOUNTAINS, ARIZONA
From 29-MAY-11 16:30:00 to 29-MAY-11 18:45:00 (MST-7)
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Show Low Airport reported high wind gusts for several hours during the evening.

High Wind in WESTERN MOGOLLON RIM, ARIZONA
From 29-MAY-11 11:25:00 to 29-MAY-11 15:00:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A weather station in Doney Park measured wind gusts to 58 MPH or higher between 11:25 and 11:32 AM and again between 2:50 and 3:00 PM.  The peak wind gust was 60 MPH.  The peak wind gust at the Flagstaff Airport was 64 MPH.

High Wind in LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY, ARIZONA
From 29-MAY-11 10:20:00 to 29-MAY-11 10:50:00 (MST-7)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at Winslow measured wind gusts 58 MPH or higher for about half an hour.  The peak wind gust was 63 MPH.

High Wind in CHUSKA MOUNTAINS AND DEFIANCE PLATEAU, ARIZONA
From 29-MAY-11 12:50:00 to 29-MAY-11 18:10:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Window Rock ASOS reported wind gusts of 58 MPH or higher from about 1250 PM to 110 PM.  The peak wind gust was 60 MPH.  The ADOT wind sensor at Lupton reported wind gusts of 58 MPH or higher off and on from about 1:30 PM to 6:10 PM.  The peak wind gust was also 60 MPH.

High Wind in NORTHEAST PLATEAUS AND MESAS SOUTH OF HIGHWAY 264, ARIZONA
From 29-MAY-11 13:00:00 to 29-MAY-11 14:30:00 (MST-7)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

The Petrified Forest National Park reported a peak wind gust of 62 MPH. A wind gust to 60 MPH was reported in Kykotsmovi Village.

High Wind in LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY, ARIZONA
From 29-MAY-11 13:15:00 to 29-MAY-11 13:15:00 (MST-7)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

The Petrified Forest National Park reported a peak wind gust of 62 MPH.

High Wind in GRAND CANYON COUNTRY, ARIZONA
From 29-MAY-11 13:10:00 to 29-MAY-11 13:40:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Grand Canyon ASOS reported peak winds of 58 MPH.

High Wind in LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY, ARIZONA
From 29-MAY-11 11:50:00 to 29-MAY-11 18:20:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The ADOT weather station at Two Guns reported wind gusts of 58 MPH or higher from late morning into early evening.  The peak wind gust was 58 MPH. Blowing dust dropped the visibility at times...down to 5 miles around 1:00 PM.

Dust Storm in CHINLE VALLEY, ARIZONA
From 29-MAY-11 13:30:00 to 29-MAY-11 14:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The visibility was down to 25 feet in blowing dust at times in the community of Many Farms.

High Wind in NORTHEAST PLATEAUS AND MESAS FROM HIGHWAY 264 NORTH, ARIZONA
From 29-MAY-11 13:20:00 to 29-MAY-11 14:20:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Hopi RAWS reported sustained winds of 41 MPH with peak wind gusts of 60 MPH.

High Wind in CHINLE VALLEY, ARIZONA
From 29-MAY-11 14:45:00 to 29-MAY-11 15:15:00 (MST-7)
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter just east of Chinle estimated wind gusts to be 65 MPH.