Alert archive / Nebraska / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Nebraska, 2008
1,338 severe thunderstorm warnings in 2008. 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 2008. Tap one for its archive.
- Severe Thunderstorm Warnings
- 1,338
- Busiest month
- June615 severe thunderstorm warnings
- Busiest day
- June 5, 2008107 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.
512 of 1,350 severe thunderstorm warnings covering Nebraska in 2008 had a qualifying storm report inside them; 735 of 947 hail, wind and damage reports fell inside a warning, on average 25 minutes after it went out.
Nebraska, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 1,350 | 512 | 62% | 947 | 78% | 25 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Goodland, KS: severe thunderstorm warnings | 287 | 106 | 63% | 281 | 65% | 23 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 296 | 130 | 56% | 253 | 82% | 19 min |
| NWS Cheyenne, WY: severe thunderstorm warnings | 181 | 59 | 67% | 159 | 64% | 18 min |
| NWS Hastings, NE: severe thunderstorm warnings | 384 | 172 | 55% | 362 | 75% | 32 min |
| NWS North Platte, NE: severe thunderstorm warnings | 492 | 170 | 65% | 297 | 75% | 22 min |
| NWS Omaha, NE: severe thunderstorm warnings | 457 | 150 | 67% | 322 | 82% | 20 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
1,338 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 County115
- Lincoln County74
- Custer County71
- Sheridan County61
- Adams County58
- Hamilton County57
- Hall County52
- Buffalo County49
- Brown County47
- Clay County46
- Webster County45
- York County45
- Cass County45
- Saunders County44
- Gage County43
- Kearney County43
- Holt County43
- Merrick County43
- Jefferson County40
- Otoe County40
- Lancaster County40
- Sioux County39
- Dawson County38
- Howard County38
- Saline County37
- Burt County37
- Hooker County37
- Rock County36
- Nuckolls County36
- Fillmore County36
- Seward County34
- Garden County34
- Grant County34
- Sherman County33
- Boone County33
- Platte County33
- Dawes County32
- Morrill County31
- Polk County31
- Thomas County31
53 more counties
- Nemaha County30
- Richardson County30
- Logan County30
- Blaine County30
- Franklin County30
- Johnson County30
- Knox County30
- Phelps County30
- Sarpy County30
- Pawnee County29
- Frontier County29
- Keith County29
- McPherson County28
- Antelope County27
- Madison County27
- Thayer County26
- Colfax County26
- Butler County26
- Box Butte County25
- Greeley County25
- Gosper County25
- Thurston County25
- Washington County25
- Loup County24
- Perkins County24
- Hitchcock County24
- Cedar County24
- Hayes County23
- Dundy County22
- Cuming County22
- Boyd County22
- Pierce County22
- Dodge County22
- Chase County21
- Harlan County21
- Valley County21
- Red Willow County20
- Scotts Bluff County20
- Arthur County19
- Nance County19
- Douglas County19
- Keya Paha County18
- Cheyenne County17
- Stanton County17
- Garfield County16
- Wheeler County16
- Wayne County16
- Furnas County15
- Deuel County15
- Dixon County13
- Dakota County12
- Banner County12
- Kimball County9
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20072009
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.