A vigorous Pacific trough moved across the region and produced strong thunderstorms and areas of heavy rainfall across western Colorado.

Flash Flood in MOFFAT, COLORADO
From 30-JUN-11 11:00:00 to 30-JUN-11 12:00:00 (MST-7)
Location: SUNBEAM
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portions of Highway 318 were washed out by flash flood waters up to a foot deep across the road.

Thunderstorm Wind in MOFFAT, COLORADO
From 30-JUN-11 11:09:00 to 30-JUN-11 11:14:00 (MST-7)
Location: DINOSAUR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts to 60 mph and half inch sized hail were reported in Dinosaur.

Hail in MESA, COLORADO
From 30-JUN-11 13:33:00 to 30-JUN-11 13:38:00 (MST-7)
Location: GRAND JCT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail to the size of nickels were reported on the northern side of Grand Junction.

Thunderstorm Wind in MOFFAT, COLORADO
From 30-JUN-11 11:22:00 to 30-JUN-11 11:27:00 (MST-7)
Location: DINOSAUR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm with pea sized hail and winds estimated at 60 mph were reported at the Dinosaur National Monument area.

Thunderstorm Wind in EAGLE, COLORADO
From 30-JUN-11 14:30:00 to 30-JUN-11 14:35:00 (MST-7)
Location: GYPSUM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gust to 60 mph reported in the town of Gypsum.

Hail in MESA, COLORADO
From 30-JUN-11 13:36:00 to 30-JUN-11 13:37:00 (MST-7)
Location: DURHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail to the size of quarters was measured at a local television station.

Thunderstorm Wind in EAGLE, COLORADO
From 30-JUN-11 14:28:00 to 30-JUN-11 14:32:00 (MST-7)
Location: GYPSUM
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe outflow winds were reported at the Eagle County Airport as winds gusted up to 69 mph.

Thunderstorm Wind in EAGLE, COLORADO
From 30-JUN-11 14:30:00 to 30-JUN-11 14:35:00 (MST-7)
Location: GYPSUM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm outflow winds of up to 60 mph were reported along with pea sized hail accumulating several inches deep.

Thunderstorm Wind in EAGLE, COLORADO
From 30-JUN-11 14:32:00 to 30-JUN-11 14:35:00 (MST-7)
Location: (EGE)EAGLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

A large cottonwood tree was blown down at Sylvan Lake State Park by strong thunderstorm wind gusts.

Hail in GARFIELD, COLORADO
From 30-JUN-11 11:50:00 to 30-JUN-11 11:55:00 (MST-7)
Location: DOUGLAS PASS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Hail to the size of nickles was reported at Douglas Pass radar site.

Thunderstorm Wind in MOFFAT, COLORADO
From 30-JUN-11 11:30:00 to 30-JUN-11 11:35:00 (MST-7)
Location: MASSADONA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm outflow winds estimated to 65 mph knocked out power for 2 to 3 hours in Massadona.

Thunderstorm Wind in EAGLE, COLORADO
From 30-JUN-11 14:44:00 to 30-JUN-11 14:50:00 (MST-7)
Location: WOLCOTT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts to 61 mph were reported near Wolcott with very heavy rainfall runoff occurring along with pea sized hail.

Thunderstorm Wind in HINSDALE, COLORADO
From 30-JUN-11 12:25:00 to 30-JUN-11 12:30:00 (MST-7)
Location: LAKE CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds gusts estimated up to 60 mph broke off tree limbs up to 3 inches in diameter at Lake City.

Thunderstorm Wind in MESA, COLORADO
From 30-JUN-11 11:10:00 to 30-JUN-11 11:15:00 (MST-7)
Location: MACK
Magnitude: 54.00 MG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorm outflow winds were reported to have moved a pole barn about 5 feet off of it's foundation at a residence located 5 miles northwest of Mack.