Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 331, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Oct 4, 1998, 11:46 AM CDT for Cass County, Nebraska. It was in force for 34 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
- Oct 4, 1998, 11:46 AM CDT (16:46 UTC)
- Expired
- Oct 4, 1998, 12:20 PM CDT
- In force
- 34 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Cass County, NE
The radar
The Omaha radar (KOAX), 49 km from the middle of the area, began a volume at 16:48 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 4.8 hours before the alert went out and 49 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
375 WUUS1 KOMA 041647 RRA SVROMA NEC025-055-153-041720- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1146 AM CDT SUN OCT 4 1998 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DOUGLAS COUNTY IN EAST CENTRAL NEBRASKA SARPY COUNTY IN EAST CENTRAL NEBRASKA NORTHERN CASS COUNTY IN SOUTHEASTERN NEBRASKA * UNTIL 1220 PM CDT * AT 1144 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL * THE A LINE OF SEVERE THUNDERSTORMS FROM IRVINGTON TO PAPILLION TO NORTH OF DUNBAR WILL MOVE NORTH AT 40 TO 50 MPH PRODUCING LARGE HAIL IN DOUGLAS...SARPY...AND FAR NORTHERN CASS COUNTY... LARGE HAIL IS LIKELY WITH THIS STORM. GET TO A REINFORCED SHELTER AND STAY AWAY FROM WINDOWS OR GLASS DOORS. ZAPOTOCNY
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, Oct 4, 11:10 AM CDT, 36 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-051200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1110 AM CDT SUN OCT 4 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTERS ACTIVATION MAY BE REQUIRED OVER EASTERN NEBRASKA AND SOUTHWEST IOWA THIS AFTERNOON AND TONIGHT. DISCUSSION... A STRONG STORM CIRCULATION OVER THE CENTRAL AND SOUTHERN PLAINS WILL RECEIVE EVEN STRONGER SUPPORT ALOFT THIS AFTERNOON AND TONIGHT. THE GREATEST THREAT FOR SEVERE WEATHER IS TO THE SOUTH IN EASTERN KANSAS AND OKLAHOMA BUT THERE IS A GOOD CHANCE OF THE SEVERE WEATHER AFFECTING EASTERN NEBRASKA AND SOUTHWEST IOWA ALSO. IN ADDITION TO THE THREAT OF SEVERE WEATHER...THE THUNDERSTORMS COULD CAUSE SOME LOCAL FLOODING FROM HEAVY RAINS...ESPECIALLY IN SOUTHEAST NEBRASKA WHERE HEAVIER RAINS HAVE OCCURRED PERIODICALLY OVER THE LAST6 COUPLE OF WEEKS. POWERS
Special weather statement, Oct 4, 11:10 AM CDT, 36 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-051200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1110 AM CDT SUN OCT 4 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTERS ACTIVATION MAY BE REQUIRED OVER EASTERN NEBRASKA AND SOUTHWEST IOWA THIS AFTERNOON AND TONIGHT. DISCUSSION... A STRONG STORM CIRCULATION OVER THE CENTRAL AND SOUTHERN PLAINS WILL RECEIVE EVEN STRONGER SUPPORT ALOFT THIS AFTERNOON AND TONIGHT. THE GREATEST THREAT FOR SEVERE WEATHER IS TO THE SOUTH IN EASTERN KANSAS AND OKLAHOMA BUT THERE IS A GOOD CHANCE OF THE SEVERE WEATHER AFFECTING EASTERN NEBRASKA AND SOUTHWEST IOWA ALSO. IN ADDITION TO THE THREAT OF SEVERE WEATHER...THE THUNDERSTORMS COULD CAUSE SOME LOCAL FLOODING FROM HEAVY RAINS...ESPECIALLY IN SOUTHEAST NEBRASKA WHERE HEAVIER RAINS HAVE OCCURRED PERIODICALLY OVER THE LAST6 COUPLE OF WEEKS. POWERS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 4, 7:48 AM CDT | Severe Thunderstorm Warning | OAX | Madison, Platte | 47 min |
| Oct 4, 8:07 AM CDT | Severe Thunderstorm Warning | OAX | Pierce, Wayne | 33 min |
| Oct 4, 10:50 AM CDT | Severe Thunderstorm Warning | OAX | Cass, Otoe | 35 min |
| Oct 4, 10:58 AM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge | 32 min |
| Oct 4, 11:20 AM CDT | Severe Thunderstorm Warning | OAX | Douglas, Washington | 35 min |
| Oct 4, 11:34 AM CDT | Severe Thunderstorm Warning | OAX | Burt | 36 min |
| Oct 4, 11:46 AM CDT | Severe Thunderstorm Warning | OAX | Douglas, Sarpy | 34 min |
| Oct 4, 12:21 PM CDT | Severe Thunderstorm Warning | OAX | Otoe | 34 min |
| Oct 4, 12:30 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 30 min |
| Oct 4, 12:45 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 35 min |
| Oct 4, 12:45 PM CDT | Severe Thunderstorm Warning | OAX | Douglas | 35 min |
| Oct 4, 2:50 PM CDT | Severe Thunderstorm Warning | OAX | Seward | 35 min |
| Oct 4, 2:57 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 33 min |
| Oct 4, 3:06 PM CDT | Severe Thunderstorm Warning | OAX | Butler | 34 min |
| Oct 4, 4:30 PM CDT | Tornado Warning | OAX | Jefferson, Saline | 50 min |
| Oct 4, 5:23 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Lancaster, Saline | 47 min |
| Oct 4, 6:50 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Otoe | 35 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.