Isolated flash flooding occurred on this Friday afternoon and evening, along with some marginally severe hail in a couple spots. Between 3 and 5 p.m. CST, numerous small, mostly single-cell thunderstorms developed over south central Nebraska, primarily south-to-north along Highway 81. Between 4:30 and 4:40 p.m. CST, hail as large as 1 inch in diameter occurred in a couple locations in and around the town of Bruning, which is in Thayer County. Nickel size hail also occurred nearby in Hardy, which is in Nuckolls County. Several storms affected northeast Thayer and southeast Fillmore Counties, with cell training noted especially between 5 and 6:30 p.m. CST. Storms temporarily became oriented in a north-south line during that time. The 24-hour rainfall at Bruning, which is in north central Thayer County, was 4.35 inches. Most of that fell in the late afternoon and early evening hours.
These storms formed north of a wavy quasi-stationary from that extended from Michigan to low pressure over Kansas, then south through Oklahoma to New Mexico. In the upper levels, a longwave trough was moving over the Great Plains, with a small low along the Colorado-Kansas border. A large ridge was along the East Coast, anchored by a subtropical high over the western Atlantic. Extensive cloudiness kept temperatures unseasonably cool, with temperatures only in the upper 60s and low 70s as thunderstorms began to form. Dewpoints were around 60. Over north central Kansas, where the stronger storms formed, temperatures had climbed into the middle 70s with dewpoints in the middle 60s. MLCAPE was between 500 and 1000 J/kg. Deep layer shear was between 30 and 35 knots.

Hail in THAYER, NEBRASKA
From 27-MAY-16 16:39:00 to 27-MAY-16 16:39:00 (CST-6)
Location: BRUNING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Flash Flood in FILLMORE, NEBRASKA
From 27-MAY-16 17:45:00 to 27-MAY-16 20:00:00 (CST-6)
Location: STRANG
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 5.00M
Reported by: Law Enforcement

Rainfall of 3 to 5 inches fell over a short period of time, resulting in flash flooding over portions of Fillmore and Thayer Counties. In Bruning, a storm total amount of 4.35 inches was reported. Local law enforcement reported water running over portions of Highway 14 approximately 4 miles west of Milligan.

Heavy Rain in THAYER, NEBRASKA
From 27-MAY-16 07:00:00 to 28-MAY-16 07:00:00 (CST-6)
Location: BRUNING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A 24-hour rainfall total of 4.35 inches was reported, with a 2-day total of 5.93 inches.

Flash Flood in THAYER, NEBRASKA
From 27-MAY-16 17:45:00 to 27-MAY-16 20:00:00 (CST-6)
Location: BRUNING
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 3.00M
Reported by: Law Enforcement

Rainfall of 3 to 5 inches fell over a short period of time, resulting in flash flooding over portions of Fillmore and Thayer Counties. In Bruning, a storm total amount of 4.35 inches was reported. Local law enforcement reported water running over portions of Highway 14 approximately 4 miles west of Milligan.

Hail in NUCKOLLS, NEBRASKA
From 27-MAY-16 16:25:00 to 27-MAY-16 16:25:00 (CST-6)
Location: HARDY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in THAYER, NEBRASKA
From 27-MAY-16 16:31:00 to 27-MAY-16 16:31:00 (CST-6)
Location: BRUNING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter