Union storm history

Heavy rainfall on above average snow pack produced record flood stage of 7.7 feet on the Grande Ronde River at Perry. Additional flooding occurred on Little Creek, Wolf Creek, Ladd Creek, and Catherine Creek. Flooding impacted 12 thousand acres of crops and dozens of homes and bu…

A social media report from Cove, Oregon indicated a thunderstorm produced hail stones to the size of 0.75 inches.

A Severe Thunderstorm Warning was issued for a cell in southern Union and Wallowa County that produced reports of severe hail.

Via a public report, hail up to 0.75 inches fell in North Powder at 1611 PDT.

Via public reports about 22 miles E of Union, hail up to 1.5 inches was reported at 1823 PDT, and 1 inch hail stones one ridge to the east were reported at 1826 PDT.

A social media report from Facebook report from La Grande, OR indicated that hailstones larger than a quarter and up to the size of 1.5 inches had fallen around 2:50pm on the 11th. Further upstream, a trained spotter 1 mile southeast of Imbler, OR reported hailstones up to 1.25 i…

A strong thunderstorm that originated in Grant County, OR continued across Umatilla County and into Union county in the evening. A trained spotter in Summerville, OR measured hail stones up to 1.75 inches in diameter. Social media reports from Summerville, OR also indicated that …

Spotter UN-114 relayed a report of ping pong sized hail east just east of La Grande, OR.

A thunderstorm that developed off the mountains east of La Grande propagated west across the town producing strong gusts. A public report indicated that winds were strong enough to break large branches and uproot small trees that caused fencing damage.

Highway 237 near MP19 closed due to high water. Grande Ronde River near Perry flooded, cresting 8.3 feet at 1130 pm on 5/20/20. Flood stage is 6.6 feet.

There was moderate flooding along the Grande Ronde River from near Hilgard Junction through La Grande and Island City and Imbler to Elgin. In addition, the rapid snowmelt and heavy rain cause widespread flooding along a number of small streams and creeks with water over roads and…

Reports of power outages due to downed tree limbs in the area north of Elgin.

There was widespread flooding of fields and lowlands along the river across Union County. There were at least 5000 acres of agricultural land flooded and numerous roads had damage.

A thunderstorm produced heavy rain in and around Cove, in Union county. One half inch to one inch of rain fell on this area over approximately a one and half hour period.

Public reported 1 inch hail followed 20 minutes later by dime sized hail.

Four inch and larger diameter tree branches down at the baseball field in La Grande due to thunderstorm winds.

Two large trees down across road. The road also had standing water and looked like a little river.

Several large tree limbs down, also 1/2 inch hail reported.

Hail size ranged from quarter to less than golf ball.

Dime to golfball sized hail reported.