Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 38, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Apr 14, 1998, 8:35 PM CDT for Butler County, Saunders County, Nebraska. It was in force for 50 min. 1 report 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
- Apr 14, 1998, 8:35 PM CDT (01:35 UTC)
- Expired
- Apr 14, 1998, 9:25 PM CDT
- In force
- 50 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
Counties Butler County, NE, Saunders County, NE
The radar
The Omaha radar (KOAX), 45 km from the middle of the area, began a volume at 01:38 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 |
|---|---|---|---|
| Apr 14, 8:55 PM CDT | Hail 1.5 | Weston, 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 |
|---|---|---|---|
| Apr 14, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.6 hours before the alert went out and 44 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
- 3 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1639 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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, Apr 14, 2:50 PM CDT, 5 hours 45 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-151200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 250 PM CDT TUE APR 14 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... ...SPOTTER ACTION... SPOTTERS SHOULD MAINTAIN A HIGH STATE OF READINESS IN SOUTHEASTERN NEBRASKA THROUGH THE EVENING. A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF SOUTHERN AND EASTERN NEBRASKA UNTIL 9 PM CDT. SOME STORMS COULD ALSO BECOME SEVERE IN THE AREA JUST NORTH AND EAST OF THE WATCH. DISCUSSION... A WARM FRONT WILL CONTINUE TO LIFT NORTH INTO THE AREA...PROVIDING A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT. A STRONG UPPER LEVEL DISTURBANCE WILL BE MOVING IN FROM THE WEST...WHILE LOW LEVEL MOISTURE INCREASES FROM THE SOUTH. THE AMOUNT OF WIND SHEAR INDICATES POTENTIAL FOR SUPERCELLS WITH TORNADOES...LARGE HAIL AND DAMAGING WINDS. MILLER
Special weather statement, Apr 14, 2:50 PM CDT, 5 hours 45 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-151200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 250 PM CDT TUE APR 14 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... ...SPOTTER ACTION... SPOTTERS SHOULD MAINTAIN A HIGH STATE OF READINESS IN SOUTHEASTERN NEBRASKA THROUGH THE EVENING. A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF SOUTHERN AND EASTERN NEBRASKA UNTIL 9 PM CDT. SOME STORMS COULD ALSO BECOME SEVERE IN THE AREA JUST NORTH AND EAST OF THE WATCH. DISCUSSION... A WARM FRONT WILL CONTINUE TO LIFT NORTH INTO THE AREA...PROVIDING A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT. A STRONG UPPER LEVEL DISTURBANCE WILL BE MOVING IN FROM THE WEST...WHILE LOW LEVEL MOISTURE INCREASES FROM THE SOUTH. THE AMOUNT OF WIND SHEAR INDICATES POTENTIAL FOR SUPERCELLS WITH TORNADOES...LARGE HAIL AND DAMAGING WINDS. MILLER
Special weather statement, Apr 14, 5:06 PM CDT, 3 hours 29 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-151200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 250 PM CDT TUE APR 14 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... ...SPOTTER ACTION... SPOTTERS SHOULD CONTINUE IN A HIGH STATE OF READINESS IN SOUTHEASTERN NEBRASKA THROUGH THE EVENING. A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF SOUTHERN AND EASTERN NEBRASKA UNTIL 9 PM CDT. SOME STORMS COULD ALSO BECOME SEVERE IN THE AREA JUST NORTH AND EAST OF THE WATCH. DISCUSSION... A WARM FRONT WILL CONTINUE TO LIFT NORTH INTO THE AREA...PROVIDING A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT. A STRONG UPPER LEVEL DISTURBANCE WILL BE MOVING IN FROM THE WEST...WHILE LOW LEVEL MOISTURE INCREASES FROM THE SOUTH. THE AMOUNT OF WIND SHEAR INDICATES POTENTIAL FOR SUPERCELLS WITH TORNADOES...LARGE HAIL AND DAMAGING WINDS. MILLER
Special weather statement, Apr 14, 5:18 PM CDT, 3 hours 17 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-151200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 518 PM CDT TUE APR 14 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... ...SPOTTER ACTION... SPOTTERS SHOULD CONTINUE IN A HIGH STATE OF READINESS IN SOUTHEASTERN NEBRASKA THROUGH THE EVENING. A TORNADO WATCH IS IN EFFECT FOR SOUTHERN AND EASTERN NEBRASKA UNTIL 9 PM CDT. SOME STORMS COULD BECOME SEVERE IN THE AREA JUST NORTH AND EAST OF THE WATCH LATER. SPOTTERS IN SOUTHEAST NEBRASKA IN COUNTIES SUCH AS GAGE...PAWNEE AND JOHNSON COUNTIES SHOULD BE DEPLOYED. DISCUSSION... A WARM FRONT CONTINUES TO LIFT NORTH INTO THE AREA...PROVIDING A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT. THE FRONT AT 5 PM WAS ALONG THE KANSAS-NEBRASKA BORDER. THUNDERSTORMS HAVE BEGUN TO DEVELOP ALONG THE WARM FRONT AND THE DRY LINE THAT TRAILS SOUTH OF THE WARM FRONT ACROSS EASTERN KANSAS. AS THE WARM FRONT MOVES NORTH AND A STRONG UPPER LEVEL DISTURBANCE MOVES IN FROM THE WEST...STORMS MAY BECOME SEVERE AND MOVE INTO SOUTHEAST NEBRASKA. THE AMOUNT OF WIND SHEAR INDICATES SUPERCELLS ARE LIKELY WITH TORNADOES...LARGE HAIL AND DAMAGING WINDS. IN ADDITION OTHER STORMS NORTH OF THE WARM FRONT MAY ALSO BECOME SEVERE WITH THE MAIN THREAT LARGE HAIL AND DAMAGING WINDS. SMITH
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:10 PM CDT | Tornado Warning | OAX | Butler, Seward | 35 min |
| Apr 14, 7:17 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Otoe | 33 min |
| Apr 14, 8:01 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 34 min |
| Apr 14, 8:25 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Douglas, Washington | 45 min |
| Apr 14, 9:09 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 46 min |
| Apr 14, 9:24 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Douglas, Saunders | 46 min |
| Apr 14, 9:56 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 44 min |
| Apr 14, 9:50 PM CDT | Tornado Warning | OAX | Page | 30 min |
| Apr 14, 10:20 PM CDT | Severe Thunderstorm Warning | OAX | Page | 15 min |
| Apr 14, 10:23 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 47 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.