Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 112, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jun 30, 2020, 9:00 PM CDT for Antelope County, Boone County, Nebraska. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 30, 2020, 9:00 PM CDT (02:00 UTC)
- Expired
- Jun 30, 2020, 9:30 PM CDT
- In force
- 30 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Antelope County, NE, Boone County, NE
The radar
The Omaha radar (KOAX), 157 km from the middle of the area, began a volume at 02:02 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 157 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
- 3121 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 7:09 PM CDT, 1 hour 51 minutes earlier.
Area forecast discussion, Jun 30, 7:09 PM CDT, 1 hour 51 minutes before
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</html>Hazardous weather outlook, Jun 30, 6:41 PM CDT, 2 hours 19 minutes before
Hazardous Weather Outlook National Weather Service Omaha/Valley NE 641 PM CDT Tue Jun 30 2020 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-011345- Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler- Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline- Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 641 PM CDT Tue Jun 30 2020 This Hazardous Weather Outlook is for portions of southwest Iowa...west central Iowa...east central Nebraska...northeast Nebraska and southeast Nebraska. .DAY ONE...Tonight and Wednesday Storms have begun to develop in north central Nebraska and will then progress east into northeast Nebraska later this evening. Damaging winds and hail are possible with this activity. Storms may linger in east central and southeast Nebraska, as well as southwest Iowa, through mid morning Wednesday. Then there is a chance for additional thunderstorms in these same areas, generally south and southeast of Interstate 80, during the afternoon. There is a small chance for severe storms with large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Wednesday night through Tuesday Very warm and somewhat humid conditions are forecast through next Tuesday. Highs from the upper 80s to middle 90s combined with the humidity will push heat index values into the 95 to 102 range each afternoon. There will be intermittent chances for thunderstorms from Thursday into early next week. Later outlooks will address the chance of severe storms in those periods. .SPOTTER INFORMATION STATEMENT... Spotter activation could be needed in parts of northeast Nebraska this evening.
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 9:19 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 41 min |
| Jun 30, 9:56 PM CDT | Severe Thunderstorm Warning | OAX | Boone, Platte | 34 min |
| Jun 30, 10:26 PM CDT | Severe Thunderstorm Warning | OAX | Boone, Platte | 49 min |
| Jun 30, 10:47 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 43 min |
| Jun 30, 11:10 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Dodge, Saunders | 35 min |
| Jun 30, 11:39 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Douglas, Sarpy, Saunders, Washington | 36 min |
| Jul 1, 12:14 AM CDT | Special Weather Statement | OAX | Cass, Douglas, Sarpy, Washington | 31 min |
| Jul 1, 12:34 AM CDT | Special Weather Statement | OAX | Otoe, Saline | 26 min |
| Jul 1, 12:57 AM CDT | Severe Thunderstorm Warning | OAX | Lancaster, Saline, Seward | 33 min |
| Jul 1, 1:32 AM CDT | Special Weather Statement | OAX | Boone | 28 min |
| Jul 1, 1:40 AM CDT | Special Weather Statement | OAX | Lancaster | 20 min |
| Jul 1, 2:28 AM CDT | Areal Flood Advisory | OAX | Lancaster, Seward | 3 hr |
| Jul 1, 2:48 AM CDT | Special Weather Statement | OAX | Pawnee, Richardson | 27 min |
| Jul 1, 3:06 AM CDT | Severe Thunderstorm Warning | OAX | Butler, Saunders | 39 min |
| Jul 1, 3:41 AM CDT | Special Weather Statement | OAX | Butler | 34 min |
| Jul 1, 1:36 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 24 min |
| Jul 1, 2:01 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 31 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2020Every severe thunderstorm warning in 2020
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.