A strong low pressure system tracked into the Pacific Northwest on the 2nd of May with a trailing cold front that moved into Wyoming the morning of the 4th.  Ahead of the front, a strong pressure gradient developed giving us high wind warning criteria across southern Wyoming the morning of the 3rd with widespread warning criteria developing the morning of the 4th and persisting through the day.  A brief period of calm winds was observed immediately behind the cold front in our northern counties, associated with a bubble high.  But as the high moved east of the CWA, very strong west to northwest winds returned through sunset.  Forecast soundings from across the region indicated the potential for a deep and well mixed boundary layer to mix extremely high wind gusts from roughly 600mb to the surface in the afternoon of the 4th.  Observed soundings from nearby stations the morning of, and shortly after the event showed this deep boundary layer indeed did occur.

High Wind in KIMBALL, NEBRASKA
From 04-MAY-10 12:44:00 to 04-MAY-10 12:45:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Dix 9 miles north.

High Wind in KIMBALL, NEBRASKA
From 04-MAY-10 12:50:00 to 04-MAY-10 12:51:00 (MST-7)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Kimball.

High Wind in BANNER, NEBRASKA
From 04-MAY-10 11:42:00 to 04-MAY-10 11:43:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Albin 8 miles northeast.

High Wind in BOX BUTTE, NEBRASKA
From 04-MAY-10 11:54:00 to 04-MAY-10 11:55:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Alliance.

High Wind in BANNER, NEBRASKA
From 04-MAY-10 12:42:00 to 04-MAY-10 12:43:00 (MST-7)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Harrisburg 13 west.

High Wind in BOX BUTTE, NEBRASKA
From 04-MAY-10 13:45:00 to 04-MAY-10 13:46:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Alliance.

High Wind in SCOTTS BLUFF, NEBRASKA
From 04-MAY-10 10:55:00 to 04-MAY-10 10:56:00 (MST-7)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Scotts Bluff.

High Wind in MORRILL, NEBRASKA
From 04-MAY-10 11:23:00 to 04-MAY-10 11:24:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

In Bridgeport.

High Wind in MORRILL, NEBRASKA
From 04-MAY-10 11:24:00 to 04-MAY-10 11:30:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Blowing dust reported reducing visibilities to a quarter mile at times.

High Wind in KIMBALL, NEBRASKA
From 04-MAY-10 14:50:00 to 04-MAY-10 14:51:00 (MST-7)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Kimball.

High Wind in MORRILL, NEBRASKA
From 04-MAY-10 16:05:00 to 04-MAY-10 16:06:00 (MST-7)
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported a 14 inch tree limb broke off a tree and totaled a car. Branches down throughout the town. Power lines down as well.

High Wind in CHEYENNE, NEBRASKA
From 04-MAY-10 13:53:00 to 04-MAY-10 13:54:00 (MST-7)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Sidney.

High Wind in SCOTTS BLUFF, NEBRASKA
From 04-MAY-10 14:12:00 to 04-MAY-10 14:13:00 (MST-7)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Scotts Bluff.

High Wind in BANNER, NEBRASKA
From 04-MAY-10 14:42:00 to 04-MAY-10 14:43:00 (MST-7)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Harrisburg 13 miles west southwest.

High Wind in MORRILL, NEBRASKA
From 04-MAY-10 13:18:00 to 04-MAY-10 13:19:00 (MST-7)
Magnitude: 63.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: COOP Observer

Bridgeport Coop observer reported power lines and tree branches down.