The early to mid-evening hours on this Tuesday ended up being more active severe weather-wise than originally anticipated for several counties north of Interstate 80 in South Central Nebraska. Primarily between 7 and 10 PM CDT, a cluster of strong to severe thunderstorms pushed through areas primarily north of a line from near Loup City to York, before exiting into southeast Nebraska. The majority of severe weather reports focused across Valley, Nance, Merrick and Polk Counties. Although these storms resulted in several reports of large hail up to golf ball size, and a few reports of strong winds of 50-60 MPH, the most dominant supercell storm of the evening also spawned a weak tornado that was on the ground for several minutes in northern Merrick County. No damage was reported from this tornado, and photographs revealed that it was landspout in nature, featuring a translucent condensation funnel. Hail-wise, the largest stones to golf ball size were reported near the communities of Spalding and Clarks. Well to the south of the main storm cluster, a smaller, weaker cluster of storms developed along an outflow boundary from the northern storms, with one of these storms dropping penny size hail in Hastings.
On the synoptic scale, the primary trigger for thunderstorms was a broad mid-level trough passing through the Central Plains. The initial severe storm development took place during the mid to late-afternoon hours in north central Nebraska along an inverted surface trough axis, extending northwest from a weak low pressure center near Kansas City. As the northern Nebraska storms dropped southeast into the local area, they became increasingly organized, taking full advantage of a mesoscale environment featuring 1500-2500 J/kg mixed-layer CAPE, but only modest deep-layer vertical wind shear around 30 knots.

Hail in NANCE, NEBRASKA
From 14-JUN-11 18:58:00 to 14-JUN-11 18:58:00 (CST-6)
Location: BELGRADE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POLK, NEBRASKA
From 14-JUN-11 19:50:00 to 14-JUN-11 19:50:00 (CST-6)
Location: POLK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NANCE, NEBRASKA
From 14-JUN-11 19:12:00 to 14-JUN-11 19:12:00 (CST-6)
Location: FULLERTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in NANCE, NEBRASKA
From 14-JUN-11 19:02:00 to 14-JUN-11 19:02:00 (CST-6)
Location: FULLERTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated at 60 MPH.

Hail in POLK, NEBRASKA
From 14-JUN-11 19:56:00 to 14-JUN-11 19:56:00 (CST-6)
Location: POLK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NANCE, NEBRASKA
From 14-JUN-11 19:29:00 to 14-JUN-11 19:29:00 (CST-6)
Location: FULLERTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POLK, NEBRASKA
From 14-JUN-11 20:00:00 to 14-JUN-11 20:00:00 (CST-6)
Location: SHELBY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NANCE, NEBRASKA
From 14-JUN-11 19:08:00 to 14-JUN-11 19:08:00 (CST-6)
Location: FULLERTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SHERMAN, NEBRASKA
From 14-JUN-11 18:25:00 to 14-JUN-11 18:25:00 (CST-6)
Location: LITCHFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in YORK, NEBRASKA
From 14-JUN-11 20:12:00 to 14-JUN-11 20:12:00 (CST-6)
Location: BENEDICT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in VALLEY, NEBRASKA
From 14-JUN-11 18:36:00 to 14-JUN-11 18:36:00 (CST-6)
Location: NORTH LOUP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GREELEY, NEBRASKA
From 14-JUN-11 18:25:00 to 14-JUN-11 18:25:00 (CST-6)
Location: SPALDING
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 100.00K
Reported by: Trained Spotter

Hail in YORK, NEBRASKA
From 14-JUN-11 20:23:00 to 14-JUN-11 20:23:00 (CST-6)
Location: YORK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NANCE, NEBRASKA
From 14-JUN-11 19:10:00 to 14-JUN-11 19:10:00 (CST-6)
Location: FULLERTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in SHERMAN, NEBRASKA
From 14-JUN-11 18:45:00 to 14-JUN-11 18:45:00 (CST-6)
Location: ASHTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NANCE, NEBRASKA
From 14-JUN-11 19:02:00 to 14-JUN-11 19:02:00 (CST-6)
Location: FULLERTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERRICK, NEBRASKA
From 14-JUN-11 19:30:00 to 14-JUN-11 19:30:00 (CST-6)
Location: CLARKS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GREELEY, NEBRASKA
From 14-JUN-11 18:39:00 to 14-JUN-11 18:39:00 (CST-6)
Location: SPALDING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in MERRICK, NEBRASKA
From 14-JUN-11 19:03:00 to 14-JUN-11 19:10:00 (CST-6)
Location: ARCHER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A weak tornado touched down in northern Merrick County, with no damage reported.

Hail in ADAMS, NEBRASKA
From 14-JUN-11 19:35:00 to 14-JUN-11 19:35:00 (CST-6)
Location: HASTINGS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERRICK, NEBRASKA
From 14-JUN-11 19:34:00 to 14-JUN-11 19:34:00 (CST-6)
Location: CLARKS
Magnitude: 1.75 
Property damage: 50.00K
Crop damage: 1.00M
Reported by: Trained Spotter

Golf ball size hail was accompanied by wind gusts estimated at 50 MPH.

Hail in MERRICK, NEBRASKA
From 14-JUN-11 19:27:00 to 14-JUN-11 19:37:00 (CST-6)
Location: CLARKS
Magnitude: 1.50 
Property damage: 100.00K
Crop damage: 1.00M
Reported by: Trained Spotter

Hail up to the size of ping pong balls fell for 10 minutes.

Hail in GREELEY, NEBRASKA
From 14-JUN-11 18:18:00 to 14-JUN-11 18:18:00 (CST-6)
Location: SPALDING
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in VALLEY, NEBRASKA
From 14-JUN-11 18:32:00 to 14-JUN-11 18:32:00 (CST-6)
Location: NORTH LOUP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter