Alert archive / Nebraska / Special Weather Statements in 2021
Special Weather Statement, NWS Omaha, NE
NWS Omaha, NE issued this special weather statement at Apr 4, 2021, 8:21 PM CDT for Butler County, Nebraska. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 4, 2021, 8:21 PM CDT (01:21 UTC)
- Expired
- Apr 4, 2021, 9:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Omaha, NE
County Butler County, NE
The radar
The Omaha radar (KOAX), 69 km from the middle of the area, began a volume at 01:25 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.4 hours before the alert went out and 68 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
- 452 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 3078 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
693 WWUS83 KOAX 050121 SPSOAX Special Weather Statement National Weather Service Omaha/Valley Nebraska 821 PM CDT Sun Apr 4 2021 NEZ050-065-050200- Seward NE-Butler NE- 821 PM CDT Sun Apr 4 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SEWARD AND SOUTHERN BUTLER COUNTIES UNTIL 900 PM CDT... At 820 PM CDT, Doppler radar was tracking a strong thunderstorm 6 miles east of Stromsburg, or 16 miles north of York, moving east at 35 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Seward, David City, Utica, Rising City, Brainard, Staplehurst, Dwight, Bee, Ulysses, Garrison, Surprise and Tamora. LAT...LON 4129 9701 4089 9699 4090 9737 4129 9737 TIME...MOT...LOC 0120Z 268DEG 31KT 4110 9747 $$ Mead
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 10:44 PM CDT | Special Weather Statement | OAX | Platte | 31 min |
| Apr 4, 11:03 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 14 min |
| Apr 4, 11:47 PM CDT | Special Weather Statement | OAX | Colfax | 28 min |
| Apr 5, 12:24 AM CDT | Severe Thunderstorm Warning | OAX | Dodge, Douglas, Sarpy, Saunders, Washington | 36 min |
| Apr 5, 1:07 AM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge, Washington | 23 min |
| Apr 5, 1:28 AM CDT | Severe Thunderstorm Warning | OAX | Douglas, Washington | 32 min |
| Apr 5, 2:05 AM CDT | Special Weather Statement | OAX | Colfax, Dodge, Saunders | 55 min |
| Apr 5, 2:08 AM CDT | Special Weather Statement | OAX | Burt | 52 min |
| Apr 5, 2:52 AM CDT | Special Weather Statement | OAX | Dodge, Douglas, Washington | 53 min |
| Apr 5, 3:39 AM CDT | Special Weather Statement | OAX | Harrison, Pottawattamie | 51 min |
| Apr 5, 6:28 AM CDT | Special Weather Statement | OAX | Harrison, Monona, Pottawattamie, Shelby | 47 min |
Nearby
Special Weather Statements in Nebraska, 2021Every special weather statement 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.