Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 19, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 7, 1997, 4:29 PM CDT for Richardson County, Nebraska. It was in force for 61 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
- May 7, 1997, 4:29 PM CDT (21:29 UTC)
- Expired
- May 7, 1997, 5:30 PM CDT
- In force
- 61 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Richardson County, NE
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 7, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 9.5 hours before the alert went out and 125 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
- 463 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 310 m²/s²
- 0-3 km storm-relative helicity
- 415 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
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, May 7, 10:52 AM CDT, 5 hours 37 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-081200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1055 AM CDT WED MAY 7 1997 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED INTO THIS EVENING OVER EASTERN NEBRASKA AND WESTERN IOWA. DISCUSSION... THUNDERSTORMS DEVELOPING OVER NORTHEAST NEBRASKA COULD POSSIBLY BECOME SEVERE EARLY THIS AFTERNOON OVER PARTS OF EAST CENTRAL NEBRASKA AND WEST CENTRAL IOWA. THESE STORMS WERE NORTH OF A WARM FRONT THAT WAS ALONG THE PLATTE RIVER. OTHER THUNDERSTORM DEVELOPMENT...INCLUDING SOME POSSIBLY SEVERE...COULD DEVELOP OR MOVE INTO SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATER THIS AFTERNOON AS A COLD FRONT ENTERS THE AREA. THE MAIN THREAT FROM THESE STORMS ARE GUSTY WINDS AND HAIL...ALTHOUGH SUPERCELL DEVELOPMENT AND A POSSIBLE TORNADO CAN/T PBE RULED OUT. CHERMOK
Special weather statement, May 7, 10:55 AM CDT, 5 hours 34 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-081200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1055 AM CDT WED MAY 7 1997 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED INTO THIS EVENING OVER EASTERN NEBRASKA AND WESTERN IOWA. DISCUSSION... THUNDERSTORMS DEVELOPING OVER NORTHEAST NEBRASKA COULD POSSIBLY BECOME SEVERE EARLY THIS AFTERNOON OVER PARTS OF EAST CENTRAL NEBRASKA AND WEST CENTRAL IOWA. THESE STORMS WERE NORTH OF A WARM FRONT THAT WAS ALONG THE PLATTE RIVER. OTHER THUNDERSTORM DEVELOPMENT...INCLUDING SOME POSSIBLY SEVERE...COULD DEVELOP OR MOVE INTO SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATER THIS AFTERNOON AS A COLD FRONT ENTERS THE AREA. THE MAIN THREAT FROM THESE STORMS ARE GUSTY WINDS AND HAIL...ALTHOUGH SUPERCELL DEVELOPMENT AND A POSSIBLE TORNADO CAN/T BE RULED OUT. CHERMOK
Special weather statement, May 7, 3:57 PM CDT, 32 minutes before
NEZ034-044-045-051-IAZ043-072200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 355 PM CDT WED MAY 7 1997 ...SEVERE THUNDERSTORM WATCH 261 HAS BEEN CANCELLED FOR A PART OF EAST CENTRAL NEBRASKA AND WEST CENTRAL IOWA... A LINE OF STRONG TO SEVERE THUNDERSTORMS WAS ORGANIZING FROM SOUTHWEST OF OMAHA NORTHEAST TO EASTERN HARRISON COUNTY IOWA. THE THREAT OF SEVERE THUNDERSTORMS NORTHWEST OF THIS AREA HAS DIMINISHED. THUS THE SEZVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR SAUNDERS...DODGE...WASHINGTON AND BURT COUNTIES OF EASTERN NEBRASKA AND FOR MONONA COUNTY IOWA. CHERMOK
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 4:49 AM CDT | Severe Thunderstorm Warning | OAX | Wayne | 46 min |
| May 7, 3:01 PM CDT | Severe Thunderstorm Warning | OAX | Douglas | 64 min |
| May 7, 3:58 PM CDT | Severe Thunderstorm Warning | OAX | Sarpy | 47 min |
| May 7, 4:04 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Pawnee | 61 min |
| May 7, 4:06 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha | 49 min |
| May 7, 4:09 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 66 min |
| May 7, 4:13 PM CDT | Tornado Warning | OAX | Lancaster | 47 min |
| May 7, 4:21 PM CDT | Tornado Warning | OAX | Gage | 39 min |
| May 7, 4:40 PM CDT | Tornado Warning | OAX | Johnson, Otoe | 65 min |
| May 7, 3:36 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 64 min |
| May 7, 4:16 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 64 min |
| May 7, 4:49 PM CDT | Tornado Warning | OAX | Mills | 66 min |
| May 7, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 62 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; the sounding from the Mesonet's radiosonde archive.