Alert archive / Nebraska / Tornado Warnings in 1997
Tornado Warning 12, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jul 7, 1997, 5:06 PM CDT for Pierce County, Nebraska. It was in force for 49 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 1997, 5:06 PM CDT (22:06 UTC)
- Expired
- Jul 7, 1997, 5:55 PM CDT
- In force
- 49 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Pierce County, NE
The radar
The Omaha radar (KOAX), 147 km from the middle of the area, began a volume at 22:09 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 5:40 PM CDT | Hail 1 | Pierce, NE | Corn crops were flattened in fields southwest of Pierce. |
| Jul 7, 5:48 PM CDT | Thunderstorm Wind 65 | Pierce, NE |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 7, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.1 hours before the alert went out and 146 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
- 929 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 072206 RRA TOROMA NEC139-072255- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 506 PM CDT MON JUL 7 1997 * TORNADO WARNING FOR PIERCE COUNTY - IN NORTHEASTERN NEBRASKA * UNTIL 555 PM CDT * SOME LOCATIONS AFFECTED PIERCE BY AROUND 530 PM CDT ALSO RURAL AREAS WEST OF PIERCE * AT 504 PM CDT...A DEVELOPING TORNADO WAS INDICATED BY DOPPLER RADAR 19 MILES WEST NORTHWEST OF NORFOLK OR 7 MILES SOUTH SOUTHWEST OF FOSTER MOVING EAST AT 20 MPH. PERSONS IN THE WARNED AREA SHOULD TAKE SHELTER IN A BASEMENT IF AVAILABLE. OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. CARS AND MOBILE HOMES SHOULD BE ABANDONED. GW
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 3:44 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 51 min |
| Jul 7, 4:17 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 63 min |
| Jul 7, 4:28 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 62 min |
| Jul 7, 4:34 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 31 min |
| Jul 7, 5:20 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 50 min |
| Jul 7, 5:45 PM CDT | Severe Thunderstorm Warning | OAX | Madison | 50 min |
| Jul 7, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Wayne | 62 min |
| Jul 7, 6:03 PM CDT | Severe Thunderstorm Warning | OAX | Pierce | 47 min |
| Jul 7, 6:11 PM CDT | Tornado Warning | OAX | Madison | 49 min |
| Jul 7, 6:11 PM CDT | Tornado Warning | OAX | Stanton | 64 min |
Nearby
Tornado Warnings in Nebraska, 1997Every tornado warning in 1997Tornadoes in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.