Alert archive / Nebraska / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 292
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2021, 11:59 PM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2021, 11:59 PM CDT (04:59 UTC)
- Expired
- Jun 20, 2021, 4:21 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 33 counties
Adams County, IA, Audubon County, IA, Cass County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Taylor County, IA, Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Andrew County, MO, Atchison County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Cass County, NE, Douglas County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 65 km from the middle of the area, began a volume at 05:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 5.0 hours before the alert went out and 65 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2439 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
076 WWUS20 KWNS 200457 SEL2 SPC WW 200457 IAZ000-KSZ000-MOZ000-NEZ000-201000- URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 292 NWS Storm Prediction Center Norman OK 1155 PM CDT Sat Jun 19 2021 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southwest Iowa Northeast Kansas Northwest Missouri Southeast Nebraska * Effective this Saturday night and Sunday morning from 1155 PM until 500 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...A well-organized cluster of storms will continue east-northeastward across the region overnight with the continued potential for damaging winds and some severe hail. The severe thunderstorm watch area is approximately along and 70 statute miles north and south of a line from 10 miles north northwest of Beatrice NE to 55 miles east northeast of Shenandoah IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 289...WW 291... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 24040. ...Guyer
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 11:09 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Fremont, Guthrie and 10 more | 96 min |
| Jun 20, 3:37 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 12 more | 113 min |
| Jun 20, 10:57 AM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Lee, Louisa, Scott | 2 hr |
| Jun 20, 1:10 PM CDT | Mesoscale Discussion | SPC | Boone, Butler, Calhoun, Cerro Gordo, Emmet, Floyd and 17 more | 95 min |
| Jun 20, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo and 23 more | 7 hr |
| Jun 20, 2:02 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Boone, Cass, Clarke and 22 more | 118 min |
| Jun 20, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Boone, Buchanan, Cedar, Clarke and 35 more | 7 hr |
| Jun 20, 5:22 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 9 more | 113 min |
| Jun 20, 6:56 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Des Moines, Henry and 15 more | 2 hr |
| Jun 19, 7:22 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Logan, Rawlins, Sherman, Thomas and 1 more | 113 min |
| Jun 19, 9:00 PM CDT | Mesoscale Discussion | SPC | Cloud, Decatur, Graham, Jewell, Mitchell, Norton and 7 more | 60 min |
| Jun 19, 9:43 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Clay, Cloud, Ellsworth, Jewell, Lincoln and 10 more | 4 hr |
| Jun 19, 9:49 PM CDT | Mesoscale Discussion | SPC | Audrain, Chariton, Lincoln, Macon, Monroe, Montgomery and 7 more | 56 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2021Severe Thunderstorm Watches in Iowa, 2021Severe Thunderstorm Watches in Missouri, 2021Every severe thunderstorm watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.