Alert archive / Nebraska / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Nebraska, 2023
1,234 severe thunderstorm warnings in 2023. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Severe Thunderstorm Warnings
- 1,234
- Busiest month
- July360 severe thunderstorm warnings
- Busiest day
- June 24, 202364 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
610 of 1,234 severe thunderstorm warnings covering Nebraska in 2023 had a qualifying storm report inside them; 1,182 of 1,413 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.
Nebraska, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 1,234 | 610 | 51% | 1,413 | 84% | 22 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Cheyenne, WY: severe thunderstorm warnings | 414 | 168 | 59% | 337 | 88% | 21 min |
| NWS North Platte, NE: severe thunderstorm warnings | 360 | 193 | 46% | 336 | 88% | 21 min |
| NWS Goodland, KS: severe thunderstorm warnings | 413 | 191 | 54% | 652 | 78% | 27 min |
| NWS Hastings, NE: severe thunderstorm warnings | 323 | 166 | 49% | 516 | 82% | 23 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 228 | 126 | 45% | 282 | 82% | 18 min |
| NWS Omaha, NE: severe thunderstorm warnings | 371 | 147 | 60% | 513 | 81% | 23 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
1,234 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cherry County76
- Sioux County65
- Lincoln County62
- Sheridan County55
- Franklin County53
- Morrill County50
- Scotts Bluff County50
- Cheyenne County49
- Webster County45
- Custer County45
- Gage County45
- Garden County45
- Banner County45
- Otoe County44
- Harlan County44
- Kimball County42
- Dundy County41
- Nuckolls County39
- Johnson County39
- Furnas County39
- Lancaster County38
- Keith County37
- Pawnee County37
- Madison County36
- Adams County35
- Nemaha County35
- Platte County35
- Saunders County35
- Dawes County35
- Knox County34
- McPherson County34
- Cass County34
- Kearney County34
- Boone County33
- Box Butte County33
- Perkins County33
- Clay County32
- Dodge County32
- Arthur County32
- Hitchcock County32
53 more counties
- Stanton County32
- Antelope County31
- Pierce County31
- Brown County31
- Phelps County31
- Buffalo County30
- Cedar County30
- Blaine County30
- Rock County30
- Gosper County30
- Washington County29
- Hayes County29
- Dawson County28
- Burt County27
- Grant County27
- Holt County26
- Richardson County26
- Logan County26
- Thayer County26
- Jefferson County26
- Red Willow County26
- Chase County26
- Wayne County26
- Saline County25
- Greeley County25
- Cuming County25
- Butler County24
- Colfax County24
- Frontier County24
- Valley County23
- Garfield County23
- Thomas County23
- Loup County23
- Merrick County23
- Fillmore County22
- Sherman County21
- Hamilton County21
- Seward County21
- Wheeler County20
- Nance County20
- Deuel County20
- Hall County19
- Sarpy County19
- York County19
- Thurston County19
- Keya Paha County18
- Howard County18
- Douglas County17
- Hooker County16
- Dixon County15
- Polk County15
- Boyd County12
- Dakota County11
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20222024
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.