There was a lot of active weather across South Central Nebraska on this Wednesday, occurring in multiple episodes throughout the entire day, culminating in seven tornadoes. Three of these tornadoes were classified as EF-1 with the other four producing EF-0 damage. Just after sunrise, scattered showers and thunderstorms developed. While most of these storms were sub-severe, the first severe reports of the day occurred over Franklin county. Just before 10 am CDT, one inch hail fell over parts of Franklin county. These thunderstorms departed into eastern Nebraska by 1 pm CDT. In the wake of the initial storms, several storms, some of which were supercells, formed over Webster and Franklin counties, and congealed into clusters and lifted northeast into Adams and Clay counties. Around 2 pm CDT, hail up to the size of golf balls was reported in and nearby Hastings. As these storm clusters moved north, new isolated supercells formed in surrounding areas, including in their wake. These newly-formed cells were the ones that produced several highly-visible tornadoes over York and Clay counties. Six tornadoes occurred in a two hour period, between 3 and 5 pm CDT, over these counties. Other storms lifted into Nuckolls and Thayer counties from northern Kansas. One of these storms produced 61 mph winds at the Hebron municipal airport just before 5 pm CDT. Just after this time, another isolated supercell formed over Hall county and moved north into Howard county. This storm produced a brief tornado near Ashton and one inch hail near Cotesfield. While this was the last of the severe weather, the thunderstorms were far from over. A squall line, which had been active over southwestern Nebraska, advanced eastward while continuing to weaken. The repeated thunderstorm development resulted in significant rainfall amounts. Measurements of 2 to 3 inches were widespread. The highest total was 3.76 inches, in the town of Harvard and 7 miles southeast of Stromsburg.
These numerous thunderstorms, and the associated severe weather, were a result of lee cyclogenesis over Colorado. A negatively tilted upper-level trough extended from Colorado southeastward to Texas, with the leading edge of a 100 knot upper-level jet streak just to the west. The atmosphere was extremely unstable. Temperatures nearing 80 degrees, with dewpoints approaching 70 degrees, resulted in MLCAPE of 3000 to 3500 J/kg. Deep layer shear was around 40 knots. The supercells that became tornadic occurred in areas where surface winds were significantly veered from the southeast.

Tornado in HOWARD, NEBRASKA
From 29-MAY-13 17:05:00 to 29-MAY-13 17:05:00 (CST-6)
Location: ELBA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado briefly touched down approximately 6 miles northeast of Ashton, with a maximum wind speed estimated to be 75 MPH.  No damage was reported with this tornado.

Tornado in YORK, NEBRASKA
From 29-MAY-13 15:36:00 to 29-MAY-13 16:00:00 (CST-6)
Location: YORK ARPT
Tornado F-scale: EF1
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado touched down approximately 3 miles northwest of York, traveling along a 9 mile path before lifting approximately 12 miles northwest of York.  This tornado had a maximum width of 150 yards and maximum wind speed estimated to be 100 MPH.
Along this path, trees were damaged or uprooted, power poles were snapped and irrigation pivots overturned.  There were a couple residences which suffered minor damage, but one garage was destroyed.  Outbuildings and grain bins were also damaged or destroyed.

Tornado in CLAY, NEBRASKA
From 29-MAY-13 13:56:00 to 29-MAY-13 14:00:00 (CST-6)
Location: CLAY CENTER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado touched down in open land for a few minutes approximately 2 miles north-northeast of Clay Center.   The maximum wind speed was estimated to be 75 MPH, but no damage was reported.

Heavy Rain in ADAMS, NEBRASKA
From 29-MAY-13 06:00:00 to 30-MAY-13 06:00:00 (CST-6)
Location: AYR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A storm total rainfall amount of 3.34 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.

Heavy Rain in CLAY, NEBRASKA
From 29-MAY-13 06:00:00 to 30-MAY-13 06:00:00 (CST-6)
Location: HARVARD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A storm total rainfall amount of 3.76 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.

Heavy Rain in YORK, NEBRASKA
From 29-MAY-13 06:00:00 to 30-MAY-13 06:00:00 (CST-6)
Location: THAYER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A storm total rainfall amount of 3.76 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.

Heavy Rain in HAMILTON, NEBRASKA
From 29-MAY-13 06:00:00 to 30-MAY-13 06:00:00 (CST-6)
Location: HAMPTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A storm total rainfall amount of 3.04 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.

Heavy Rain in YORK, NEBRASKA
From 29-MAY-13 06:00:00 to 30-MAY-13 06:00:00 (CST-6)
Location: BRADSHAW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A storm total rainfall amount of 3.04 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.

Tornado in CLAY, NEBRASKA
From 29-MAY-13 14:45:00 to 29-MAY-13 14:45:00 (CST-6)
Location: SUTTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado briefly touched down approximately 6 miles north of Sutton, with an maximum wind speed estimated to be 75 MPH.  No damage was reported.

Hail in DAWSON, NEBRASKA
From 29-MAY-13 15:40:00 to 29-MAY-13 15:40:00 (CST-6)
Location: GOTHENBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in THAYER, NEBRASKA
From 29-MAY-13 15:55:00 to 29-MAY-13 15:55:00 (CST-6)
Location: HEBRON ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in THAYER, NEBRASKA
From 29-MAY-13 16:39:00 to 29-MAY-13 16:39:00 (CST-6)
Location: BELVIDERE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 65 MPH.

Hail in HOWARD, NEBRASKA
From 29-MAY-13 17:23:00 to 29-MAY-13 17:23:00 (CST-6)
Location: ELBA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, NEBRASKA
From 29-MAY-13 07:51:00 to 29-MAY-13 07:51:00 (CST-6)
Location: FRANKLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, NEBRASKA
From 29-MAY-13 07:57:00 to 29-MAY-13 07:57:00 (CST-6)
Location: HILDRETH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in CLAY, NEBRASKA
From 29-MAY-13 15:21:00 to 29-MAY-13 15:29:00 (CST-6)
Location: CLAY CENTER
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This was the second tornado to touch down approximately 2 miles north-northeast of Clay Center this day, with this one traveling along a 4 mile path before lifting 6 miles north-northeast of Clay Center.  This tornado had a maximum width of 75 yards and maximum wind speed estimated to be 100 MPH.  One home suffered minor damage, as did an outbuilding, with metal panels being pulled from the roof and walls.

Hail in FRANKLIN, NEBRASKA
From 29-MAY-13 08:00:00 to 29-MAY-13 08:00:00 (CST-6)
Location: HILDRETH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in YORK, NEBRASKA
From 29-MAY-13 15:48:00 to 29-MAY-13 16:20:00 (CST-6)
Location: MC COOL JCT
Tornado F-scale: EF1
Property damage: 1.50M
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado touched down approximately 5 miles south of York, traveling along a 16 mile path before lifting 12 miles northeast of York.  It crossed over Interstate 80 approximately 1.3 miles east of the York interchange. This tornado had a maximum width of 400 yards and maximum wind speed estimated to be 110 MPH.  Along this path, power poles and trees were snapped, large branches up to 12 to 18 inches in diameter were downed and irrigation pivots were overturned.  Two outbuildings were damaged or destroyed.

Hail in BUFFALO, NEBRASKA
From 29-MAY-13 10:00:00 to 29-MAY-13 10:00:00 (CST-6)
Location: RAVENNA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HALL, NEBRASKA
From 29-MAY-13 10:52:00 to 29-MAY-13 10:52:00 (CST-6)
Location: CAIRO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in GREELEY, NEBRASKA
From 29-MAY-13 12:20:00 to 29-MAY-13 12:20:00 (CST-6)
Location: GREELEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ADAMS, NEBRASKA
From 29-MAY-13 12:59:00 to 29-MAY-13 12:59:00 (CST-6)
Location: HASTINGS
Magnitude: 1.50 
Property damage: 125.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to ping pong ball size hail was reported on the west side of Hastings.

Hail in ADAMS, NEBRASKA
From 29-MAY-13 13:02:00 to 29-MAY-13 13:02:00 (CST-6)
Location: JUNIATA
Magnitude: 1.75 
Property damage: 125.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in ADAMS, NEBRASKA
From 29-MAY-13 13:06:00 to 29-MAY-13 13:06:00 (CST-6)
Location: HASTINGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Nickel size hail and wind gusts of 47 MPH were recorded at the Hastings NWS Office.

Hail in CLAY, NEBRASKA
From 29-MAY-13 14:10:00 to 29-MAY-13 14:20:00 (CST-6)
Location: SUTTON
Magnitude: 1.25 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Quarter to half dollar size hail was reported.

Hail in BUFFALO, NEBRASKA
From 29-MAY-13 13:35:00 to 29-MAY-13 13:35:00 (CST-6)
Location: KEARNEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Nickel to quarter size hail was reported.

Hail in BUFFALO, NEBRASKA
From 29-MAY-13 13:55:00 to 29-MAY-13 13:55:00 (CST-6)
Location: RIVERDALE
Magnitude: 1.75 
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ping pong ball to golf ball size hail was reported.

Hail in BUFFALO, NEBRASKA
From 29-MAY-13 14:15:00 to 29-MAY-13 14:15:00 (CST-6)
Location: PLEASANTON
Magnitude: 1.75 
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in YORK, NEBRASKA
From 29-MAY-13 14:45:00 to 29-MAY-13 14:45:00 (CST-6)
Location: HENDERSON
Magnitude: 1.75 
Property damage: 125.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar to golf ball size hail was reported.

Thunderstorm Wind in BUFFALO, NEBRASKA
From 29-MAY-13 13:55:00 to 29-MAY-13 13:55:00 (CST-6)
Location: RIVERDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 60 MPH.

Tornado in YORK, NEBRASKA
From 29-MAY-13 15:20:00 to 29-MAY-13 15:20:00 (CST-6)
Location: BRADSHAW
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado briefly touched down approximately 2 miles south of Bradshaw, with a maximum wind speed estimated to be 75 MPH.  No damage was reported with this tornado.