Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 45, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Apr 14, 1998, 10:20 PM CDT for Page County, Iowa. It was in force for 15 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
- Apr 14, 1998, 10:20 PM CDT (03:20 UTC)
- Expired
- Apr 14, 1998, 10:35 PM CDT
- In force
- 15 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Page County, IA
The radar
The Omaha radar (KOAX), 121 km from the middle of the area, began a volume at 03:20 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 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, 6:45 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.3 hours before the alert went out and 121 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, 5:06 PM CDT, 5 hours 14 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, 5 hours 2 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-151200- 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
Special weather statement, Apr 14, 9:32 PM CDT, 48 minutes before
NEZ042>044-050-051-065>068-078-088-150310- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 932 PM CDT TUE APR 14 1998 ...TORNADO WATCH 208 EXPIRED... TORNADO WATCH NUMBER 208 ISSUED FOR SOUTH CENTRAL AND SOUTHEAST NEBRASKA HAS EXPIRED. A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR SAUNDERS AND DODGE COUNTY UNTIL 1010 PM CDT. THESE STORMS ARE MAINLY EXPECTED TO PRODUCE LARGE HAIL OR DAMAGING WINDS. HOWEVER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. PEOPLE IN DODGE AND SAUNDERS COUNTY SHOULD STILL BE ALERT TO CHANGING WEATHER CONDITIONS FOR THE NEXT HOUR. SMITH
Special weather statement, Apr 14, 9:32 PM CDT, 48 minutes before
NEZ042>044-050-051-065>068-078-088-150310- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 932 PM CDT TUE APR 14 1998 ...TORNADO WATCH 208 EXPIRED... TORNADO WATCH NUMBER 208 ISSUED FOR SOUTH CENTRAL AND SOUTHEAST NEBRASKA HAS EXPIRED. A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR SAUNDERS AND DODGE COUNTY UNTIL 1010 PM CDT. THESE STORMS ARE MAINLY EXPECTED TO PRODUCE LARGE HAIL OR DAMAGING WINDS. HOWEVER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. PEOPLE IN DODGE AND SAUNDERS COUNTY SHOULD STILL BE ALERT TO CHANGING WEATHER CONDITIONS FOR THE NEXT HOUR. 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, 8:35 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Saunders | 50 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, 10:23 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 47 min |
Nearby
Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.