Hurricanes and Tornadoes That Hit Gretna, NE

The nearest NOAA station with 1991–2020 climate normals is Gretna 4NE, NE, 4 miles northeast of Gretna at 1,240 feet. July is the warmest, with an average high of 86°F and low of 66°F; January is the coolest, at 32°F and 14°F. June is the wettest at 5.4 inches of precipitation on average and January the driest at 0.9 inches; the year adds up to 33.3 inches over 59 days with at least a tenth of an inch. Highs reach 90°F on about 26 days a year, almost all from May to September. Lows fall below freezing on about 136 nights a year. Snowfall averages 36.4 inches a year, most of it in February. That 33.3 inches is more than at 63 of the 68 Nebraska stations used on this site (93%). Ashland, 7 miles southwest, has its own station (Ashland #2, NE): 32.5 inches a year, 0.8 less than here, and a July average high of 87°F against 86°F.

Since 1996, the National Weather Service has logged 185 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Gretna: 140 thunderstorm wind reports, 35 floods, 9 flash floods and 1 heavy rain event. They killed 0 people and injured 1, and the NWS estimated $103.7 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on July 31, 2024. June has had the most flash floods, 4 of 9. Of the 89 Nebraska cities on this site with a flash flood on record, 50 have had fewer than Gretna.

Flood insurance policyholders in Gretna's ZIP code 68028 have filed 76 claims with the National Flood Insurance Program since 1978, and were paid $1.4 million for buildings and contents, in the dollars of each year. The most came from March 2019 Midwest Flooding in 2019: 15 claims (20% of all) and $785,000. The year with the most claims was 1993, with 20. 20% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 41 Nebraska cities on this site with 10 or more claims, 27 have fewer than Gretna.