An isolated thunderstorm briefly produced localized severe downburst winds near Beaver City on this Tuesday afternoon. Scattered showers and thunderstorms developed early that afternoon, primarily from southwestern Nebraska northeast to near O'Neill. Just after 2 PM CST, an isolated, small storm developed east of this area, to the southeast of McCook. Between 3 and 5 PM CST, this storm moved east-northeast across Furnas county. At 438 PM, a spotter measured winds of 63 MPH northeast of Beaver City. After that wind gust occurred, the storm weakened.
All of these thunderstorms occurred ahead of a weak cold front that extended from Minnesota across northwestern Nebraska into the northern Colorado and Utah. The flow aloft was from the southwest as a large and strong subtropical high was over the Mid-Atlantic states. The main band of Westerlies was along the U.S.-Canada border with a fairly potent shortwave trough moving through the Canadian Prairies. Just before the storm developed, temperatures were in the upper 70s with dewpoints in the middle 60s. Despite poor mid-level lapse rates, MLCAPE was between 1500 and 1900 J/kg. Deep layer shear was around 35 kt.
The beginning of September was very wet across portions south central Nebraska, from near Hildreth east through southern Adams and southern Clay counties, and most of Fillmore, Nuckolls, and Thayer counties. Over the first four days of the month, rainfall totals ranged from 4 to 7 inches in these areas. Minor flooding occurred from the Crystal Lake State Recreation area, near Ayr, and points east along the Little Blue River. There were two crests above minor flood stage on the Little Blue at Deweese. The first was 10.8 ft on Monday the 3rd and 10.3 ft on Tuesday the 4th. Flood stage is 10 ft. Minor flooding also occurred along Big Sandy Creek through northern Thayer county, and Spring Creek at Deshler was at bankfull. Minor flooding also occurred in low spots on some rural roads.

Thunderstorm Wind in FURNAS, NEBRASKA
From 04-SEP-18 16:38:00 to 04-SEP-18 16:38:00 (CST-6)
Location: HOLLINGER
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in KEARNEY, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: WILCOX
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 6.15 was reported in Wilcox.

Heavy Rain in WEBSTER, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: AMBOY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 5.56 was reported 4 miles east of Red Cloud.

Heavy Rain in NUCKOLLS, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: NELSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 6.99 was reported 5 miles south-southeast of Deweese.

Heavy Rain in NUCKOLLS, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: ABDAL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 7.33 was reported 7 miles south-southeast of Lawrence.

Heavy Rain in THAYER, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: DAVENPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 7.04 was reported in Davenport.

Heavy Rain in CLAY, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: FAIRFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 7.00 was reported 2 miles south of Fairfield.

Heavy Rain in ADAMS, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: ROSELAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 6.15 was reported 4 miles south-southeast of Roseland.

Heavy Rain in WEBSTER, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: BLUE HILL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 6.28 was reported 2 miles northeast of Blue Hill.

Heavy Rain in FRANKLIN, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: HILDRETH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 5.83 was reported 6 miles southwest of Hildreth.

Heavy Rain in ADAMS, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: PAULINE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 5.73 was reported 7 miles southwest of Glenvil.

Heavy Rain in FILLMORE, NEBRASKA
From 01-SEP-18 00:00:00 to 05-SEP-18 06:00:00 (CST-6)
Location: OHIOWA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A multi-day rainfall total of 6.32 was reported 2 miles northwest of Ohiowa.