Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 124, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 24, 1998, 7:19 PM CDT for Douglas County, Nebraska; Pottawattamie County, Iowa. It was in force for 46 min. 3 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
- May 24, 1998, 7:19 PM CDT (00:19 UTC)
- Expired
- May 24, 1998, 8:05 PM CDT
- In force
- 46 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
Counties Pottawattamie County, IA, Douglas County, NE
The radar
The Omaha radar (KOAX), 43 km from the middle of the area, began a volume at 00:23 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 |
|---|---|---|---|
| May 24, 7:32 PM CDT | Hail 1 | Crescent, IA | |
| May 24, 7:34 PM CDT | Hail 0.75 | Crescent, IA | |
| May 24, 7:34 PM CDT | Thunderstorm Wind 52 | Crescent, IA |
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 nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 0.3 hours before the alert went out and 258 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
- 238 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1963 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
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 24, 5:30 PM CDT, 1 hour 49 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-251200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 530 PM CDT SUN MAY 24 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING OR TONIGHT IN EASTERN NEBRASKA AND SOUTHWEST IOWA. DISCUSSION... AN UPPER AIR DISTURBANCE OVER COLORADO IS SLOWLY MOVING EASTWARD AND MAY HELP TRIGGER SHOWERS AND THUNDERSTORMS OVER EASTERN NEBRASKA AND SOUTHWESTERN IOWA. ALTHOUGH THE MAIN SEVERE WEATHER THREAT IS THE GREATEST OVER KANSAS WHERE THE AIR MASS IS THE MOST UNSTABLE...SOME STORMS MAY DEVELOP AND BECOME SEVERE OVER NEBRASKA. THE PRIMARY SEVERE THUNDERSTORM THREAT WITH ANY OF THESE STORMS WOULD BE LARGE HAIL. SMITH
Special weather statement, May 24, 5:30 PM CDT, 1 hour 49 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-251200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 530 PM CDT SUN MAY 24 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING OR TONIGHT IN EASTERN NEBRASKA AND SOUTHWEST IOWA. DISCUSSION... AN UPPER AIR DISTURBANCE OVER COLORADO IS SLOWLY MOVING EASTWARD AND MAY HELP TRIGGER SHOWERS AND THUNDERSTORMS OVER EASTERN NEBRASKA AND SOUTHWESTERN IOWA. ALTHOUGH THE MAIN SEVERE WEATHER THREAT IS THE GREATEST OVER KANSAS WHERE THE AIR MASS IS THE MOST UNSTABLE...SOME STORMS MAY DEVELOP AND BECOME SEVERE OVER NEBRASKA. THE PRIMARY SEVERE THUNDERSTORM THREAT WITH ANY OF THESE STORMS WOULD BE LARGE HAIL. SMITH
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 8:48 PM CDT | Severe Thunderstorm Warning | OAX | Douglas | 47 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1998Severe Thunderstorm Warnings in Iowa, 1998Every severe thunderstorm warning in 1998
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.