Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 56, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jun 21, 1997, 12:17 AM CDT for Saunders County, Nebraska. It was in force for 63 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
- Jun 21, 1997, 12:17 AM CDT (05:17 UTC)
- Expired
- Jun 21, 1997, 1:20 AM CDT
- In force
- 63 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Saunders County, NE
The radar
The Omaha radar (KOAX), 25 km from the middle of the area, began a volume at 05:16 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 |
|---|---|---|---|
| Jun 21, 12:45 AM CDT | Thunderstorm Wind | Valparaiso, NE | Nearly 200 trees and branches downed. Two cars smashed by falling trees. Power poles downed. |
| Jun 21, 12:48 AM CDT | Thunderstorm Wind 70 | Ashland, 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 |
|---|---|---|---|
| Jun 20, 8:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 5.3 hours before the alert went out and 25 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
- 5994 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1151 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 4.8
- Supercell composite
- 25.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, Jun 20, 10:14 PM CDT, 2 hours 3 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-211200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1015 PM CDT FRI JUN 20 1997 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... SPOTTER ACTIVITY WILL CONTINUE TO BE NEEDED IN EASTERN NEBRASKA AND WESTERN IOWA TONIGHT AS A TORNADO WATCH CONTINUES IN EFFECT FOR MUCH OF EASTERN AND CENTRAL NEBRASKA UNTIL 2 AM CDT. DISCUSSION... A SQUALL LINE IN CENTRAL NEBRAKSA FROM BURWELL SOUTH THROUGH THE BROKEN BOW AREA SOUTHWEST TOWARD LEXINGTON WILL CONTINUE TO MOVE EAST TONIGHT INTO THE TORNADO WATCH AREA. DAMAGING WINDS...TORNADOES...AND LARGE HAIL WILL BE POSSIBLE ALONG PARTS OF THIS LINE AS IT MOVES INTO EASTERN NEBRASKA FROM 11 PM TO 2 AM CDT. SEVERE WEATHER WILL ALSO BE POSSIBLE IN ADVANCE OF THE LINE. SOME STORMS COULD PRODUCE VERY HEAVY RAINS AND LOWLAND FLOODING. THIS IjS A DANGEROUS WEATHER PATTERN AND RESIDENTS OF EASTERN NEBRASKA AND WESTERN IOWA SHOULD REMAIN AT A HIGH DEGREE OF ALERT. BYRD
Special weather statement, Jun 20, 10:15 PM CDT, 2 hours 2 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-211200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1015 PM CDT FRI JUN 20 1997 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... SPOTTER ACTIVITY WILL CONTINUE TO BE NEEDED IN EASTERN NEBRASKA AND WESTERN IOWA TONIGHT AS A TORNADO WATCH CONTINUES IN EFFECT FOR MUCH OF EASTERN AND CENTRAL NEBRASKA UNTIL 2 AM CDT. DISCUSSION... A SQUALL LINE IN CENTRAL NEBRAKSA FROM BURWELL SOUTH THROUGH THE BROKEN BOW AREA SOUTHWEST TOWARD LEXINGTON WILL CONTINUE TO MOVE EAST TONIGHT INTO THE TORNADO WATCH AREA. DAMAGING WINDS...TORNADOES...AND LARGE HAIL WILL BE POSSIBLE ALONG PARTS OF THIS LINE AS IT MOVES INTO EASTERN NEBRASKA FROM 11 PM TO 2 AM CDT. SEVERE WEATHER WILL ALSO BE POSSIBLE IN ADVANCE OF THE LINE. SOME STORMS COULD PRODUCE VERY HEAVY RAINS AND LOWLAND FLOODING. THIS IS A DANGEROUS WEATHER PATTERN AND RESIDENTS OF EASTERN NEBRASKA AND WESTERN IOWA SHOULD REMAIN AT A HIGH DEGREE OF ALERT. BYRD
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:08 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Saunders | 47 min |
| Jun 20, 7:31 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax | 49 min |
| Jun 20, 7:35 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Washington | 50 min |
| Jun 20, 7:54 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Saunders | 46 min |
| Jun 20, 8:25 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 50 min |
| Jun 20, 8:35 PM CDT | Severe Thunderstorm Warning | OAX | Thurston | 50 min |
| Jun 20, 8:43 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Dodge | 47 min |
| Jun 20, 8:48 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 62 min |
| Jun 20, 9:12 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 63 min |
| Jun 20, 9:24 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Stanton | 51 min |
| Jun 20, 9:40 PM CDT | Severe Thunderstorm Warning | OAX | Madison, Pierce | 50 min |
| Jun 20, 10:09 PM CDT | Tornado Warning | OAX | Cuming | 51 min |
| Jun 20, 10:56 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 64 min |
| Jun 20, 11:22 PM CDT | Tornado Warning | OAX | Dodge | 48 min |
| Jun 20, 11:42 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 58 min |
| Jun 20, 11:48 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Lancaster, Saline | 62 min |
| Jun 21, 12:08 AM CDT | Flash Flood Warning | OAX | Burt, Cuming, Dodge | 6 hr |
| Jun 21, 1:05 AM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 60 min |
| Jun 21, 1:11 AM CDT | Tornado Warning | OAX | Sarpy | 34 min |
| Jun 20, 8:54 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 51 min |
| Jun 20, 11:08 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 62 min |
| Jun 21, 1:30 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Montgomery, Page | 65 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning 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.