A strong squall line developed over the coastal waters this day and moved onshore. Squall lines are unusual enough over the Oregon waters, but this one moved over the coastal range and brought severe winds and hail to the west side interior valleys...which is very unusual.  Many trees were uprooted or broken, and a number of major roads were closed by fallen trees.  75,000 homes lost power due to this storm.

Thunderstorm Wind in COOS, OREGON
From 13-MAR-11 15:27:00 to 13-MAR-11 16:15:00 (PST-8)
Location: (OTH)NORTH BEND ARPT
Magnitude: 75.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The wind sensor at Cape Arago recorded a gust to 86 mph at 13/1200 PST as the squall line moved through.  A spotter 2N Coos Bay reported a wind gust to 71 mph at 13/1417 PST as the squall line moved through.  The Signal Tree RAWS on the Coos/Douglas county boundary reported a gust to 61 mph at 13/1335 PST as the front moved through.

Thunderstorm Wind in JOSEPHINE, OREGON
From 13-MAR-11 15:27:00 to 13-MAR-11 16:15:00 (PST-8)
Location: (SXT)SEXTON SUMMIT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Numerous trees were broken or uprooted when the squall line went through.  A spotter 2E OBrien and ODOT reported that US Highway 199 was closed due to being blocked by a large trees and downed power lines.

Thunderstorm Wind in CURRY, OREGON
From 13-MAR-11 15:27:00 to 13-MAR-11 16:15:00 (PST-8)
Location: (4BK)BROOKINGS
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The wind sensor at Cape Blanco recorded a gust to 81 mph at 13/1240 PST as the squall line moved through.  A member of the public in Brookings reported a gust to 40 mph as the squall line moved through.  It is assumed that gusts exceeding 58 mph occurred in areas between Brookings and Cape Blanco.

Thunderstorm Wind in DOUGLAS, OREGON
From 13-MAR-11 15:27:00 to 13-MAR-11 16:15:00 (PST-8)
Location: GLENDALE
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The wind sensor at the North Bank RAWS recorded a gust to 78 mph as the squall line moved through at 13/1411 PST.  The Signal Tree RAWS on the Coos/Douglas county border reported a gust to 61 mph at 13/1335 PST.  A spotter 1WNW Roseburg reported a gust to 60 mph at 13/1317 PST.  A retired NWS employee in Roseburg reported estimated gusts to 60 mph with the squall line.  A spotter NNE Azalea reported a fallen tree on a house and power lines down.  Trees were also blocking old Highway 99 between Azalea and Glendale.  Numerous downed trees were blocking roads.

Thunderstorm Wind in JACKSON, OREGON
From 13-MAR-11 15:27:00 to 13-MAR-11 16:15:00 (PST-8)
Location: ASHLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Numerous trees were broken or uprooted when the squall line went through.  ODOT reported Oregon Highway 62 was closed by fallen trees.  A house, shed, and mobile home in Rogue River were destroyed by falling trees.  Another house was destroyed in Jacksonville.

Hail in JOSEPHINE, OREGON
From 13-MAR-11 13:10:00 to 13-MAR-11 13:15:00 (PST-8)
Location: MERLIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reported hail size close to golf balls with lots of lightning.