Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 167, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 17, 1998, 9:31 AM CDT for Warren County, Iowa. 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
- Jun 17, 1998, 9:31 AM CDT (14:31 UTC)
- Expired
- Jun 17, 1998, 10:05 AM CDT
- In force
- 34 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Warren County, IA
The radar
The Des Moines radar (KDMX), 46 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 235 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
- -531 J/kg
- Mixed-layer LCL
- 1182 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 233 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
354 WUUS1 KDSM 171432 RRA SVRDSM IAC181-171505- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 931 AM CDT WED JUN 17 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN WARREN COUNTY IN SOUTH CENTRAL IOWA * UNTIL 1005 AM CDT * AT 929 AM CDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 24 MILES SOUTH SOUTHWEST OF DES MOINES OR 11 MILES SOUTH SOUTHWEST OF SPRING HILL MOVING EAST NORTHEAST AT 40 MPH. * THIS STORM CAN BE EXPECTED NEAR... NEW VIRGINIA NOW MILO BY 933 AM CDT CARLISLE BY 940 AM CDT HARTFORD BY 944 AM CDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS FORSTER
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, Jun 17, 5:17 AM CDT, 4 hours 14 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-171700- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 517 AM CDT WED JUN 17 1998 HAZARD--SCATTERED THUNDERSTORMS WITH SMALL HAIL...WINDS TO 50 MPH AND VERY LOCALIZED HEAVY RAINFALL. TIMING AND AREA OF CONCERN--THROUGH NOON...WEST OF A LINE FROM MASON CITY...TO NEWTON...TO CORYDON. METEOROLOGICAL COMMENTS--EARLY THIS MORNING...A NARROW ZONE OF LIFT CAUSED BY MID-LEVEL WARM AIR ADVECTION EXTENDED FROM SOUTHEAST SOUTH DAKOTA INTO SOUTHWEST IOWA. SCATTERED SHOWERS AND THUNDERSTORMS HAD DEVELOPED IN THIS AREA AND WERE MOVING NORTHEAST AROUND 30 MPH. RAINFALL AMOUNTS OVER FAR SOUTHWEST IOWA HAVE GENERALLY BEEN IN THE ONE TO TWO TENTHS OF AN INCH RANGE DURING A THREE HOUR PERIOD... HOWEVER ISOLATED AMOUNTS UP TO ONE-HALF TO THREE-QUARTERS OF AN INCH CANNOT BE RULED OUT THIS MORNING. WITH ALL THE RAIN THAT HAS FALLEN RECENTLY OVER A LARGE PART OF IOWA...DITCHES MAY RAPIDLY FILL IN THOSE AREAS THAT RECEIVE THE MOST RAIN THIS MORNING. SOME QUICK RISES ON SMALL STREAMS COULD ALSO OCCUR BUT LARGER CREEKS AND RIVERS SHOULD NOT BE EFFECTED DUE TO THE RELATIVELY FAST MOVEMENT OF THE PRECIPITATION. ADDITIONALLY...SOME STRONG WIND GUSTS AND SMALL HAIL MAY OCCUR...BUT THESE SHOULD REMAIN BELOW SEVERE LIMITS. PRECAUTIONS--SPOTTER ACTIVATION WILL SHOULD NOT BE NECESSARY TODAY FOR SEVERE WEATHER...THOUGH SOME RAINFALL REPORTS MAY BE REQUIRED NEAR THE STRONGEST SHOWERS OR THUNDERSTORMS. IF LOCALIZED HEAVY RAIN OCCURS...THERE MAY BE SOME RAPID RISES ON STREAMS. INFORMATION REGARDING WATER OVER ROADS OR BRIDGES SHOULD BE CONVEYED TO THE NATIONAL WEATHER SERVICE OFFICE IN DES MOINES. SEARCY
Special weather statement, Jun 17, 5:17 AM CDT, 4 hours 14 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-171700- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 517 AM CDT WED JUN 17 1998 HAZARD--SCATTERED THUNDERSTORMS WITH SMALL HAIL...WINDS TO 50 MPH AND VERY LOCALIZED HEAVY RAINFALL. TIMING AND AREA OF CONCERN--THROUGH NOON...WEST OF A LINE FROM MASON CITY...TO NEWTON...TO CORYDON. METEOROLOGICAL COMMENTS--EARLY THIS MORNING...A NARROW ZONE OF LIFT CAUSED BY MID-LEVEL WARM AIR ADVECTION EXTENDED FROM SOUTHEAST SOUTH DAKOTA INTO SOUTHWEST IOWA. SCATTERED SHOWERS AND THUNDERSTORMS HAD DEVELOPED IN THIS AREA AND WERE MOVING NORTHEAST AROUND 30 MPH. RAINFALL AMOUNTS OVER FAR SOUTHWEST IOWA HAVE GENERALLY BEEN IN THE ONE TO TWO TENTHS OF AN INCH RANGE DURING A THREE HOUR PERIOD... HOWEVER ISOLATED AMOUNTS UP TO ONE-HALF TO THREE-QUARTERS OF AN INCH CANNOT BE RULED OUT THIS MORNING. WITH ALL THE RAIN THAT HAS FALLEN RECENTLY OVER A LARGE PART OF IOWA...DITCHES MAY RAPIDLY FILL IN THOSE AREAS THAT RECEIVE THE MOST RAIN THIS MORNING. SOME QUICK RISES ON SMALL STREAMS COULD ALSO OCCUR BUT LARGER CREEKS AND RIVERS SHOULD NOT BE EFFECTED DUE TO THE RELATIVELY FAST MOVEMENT OF THE PRECIPITATION. ADDITIONALLY...SOME STRONG WIND GUSTS AND SMALL HAIL MAY OCCUR...BUT THESE SHOULD REMAIN BELOW SEVERE LIMITS. PRECAUTIONS--SPOTTER ACTIVATION WILL SHOULD NOT BE NECESSARY TODAY FOR SEVERE WEATHER...THOUGH SOME RAINFALL REPORTS MAY BE REQUIRED NEAR THE STRONGEST SHOWERS OR THUNDERSTORMS. IF LOCALIZED HEAVY RAIN OCCURS...THERE MAY BE SOME RAPID RISES ON STREAMS. INFORMATION REGARDING WATER OVER ROADS OR BRIDGES SHOULD BE CONVEYED TO THE NATIONAL WEATHER SERVICE OFFICE IN DES MOINES. SEARCY
Special weather statement, Jun 17, 5:20 AM CDT, 4 hours 11 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-171700- CENTRAL IOWA THUNDERSTORM OUTLOOK...CORRECTED AREA OF CONCERN... NATIONAL WEATHER SERVICE DES MOINES IA 520 AM CDT WED JUN 17 1998 HAZARD--SCATTERED THUNDERSTORMS WITH SMALL HAIL...WINDS TO 50 MPH AND VERY LOCALIZED HEAVY RAINFALL. TIMING AND AREA OF CONCERN--THROUGH NOON...WEST OF A LINE FROM WATERLOO...TO NEWTON...TO CORYDON. METEOROLOGICAL COMMENTS--EARLY THIS MORNING...A NARROW ZONE OF LIFT CAUSED BY MID-LEVEL WARM AIR ADVECTION EXTENDED FROM SOUTHEAST SOUTH DAKOTA INTO SOUTHWEST IOWA. SCATTERED SHOWERS AND THUNDERSTORMS HAD DEVELOPED IN THIS AREA AND WERE MOVING NORTHEAST AROUND 30 MPH. RAINFALL AMOUNTS OVER FAR SOUTHWEST IOWA HAVE GENERALLY BEEN IN THE ONE TO TWO TENTHS OF AN INCH RANGE DURING A THREE HOUR PERIOD... HOWEVER ISOLATED AMOUNTS UP TO ONE-HALF TO THREE-QUARTERS OF AN INCH CANNOT BE RULED OUT THIS MORNING. WITH ALL THE RAIN THAT HAS FALLEN RECENTLY OVER A LARGE PART OF IOWA...DITCHES MAY RAPIDLY FILL IN THOSE AREAS THAT RECEIVE THE MOST RAIN THIS MORNING. SOME QUICK RISES ON SMALL STREAMS COULD ALSO OCCUR BUT LARGER CREEKS AND RIVERS SHOULD NOT BE EFFECTED DUE TO THE RELATIVELY FAST MOVEMENT OF THE PRECIPITATION. ADDITIONALLY...SOME STRONG WIND GUSTS AND SMALL HAIL MAY OCCUR...BUT THESE SHOULD REMAIN BELOW SEVERE LIMITS. PRECAUTIONS--SPOTTER ACTIVATION WILL SHOULD NOT BE NECESSARY TODAY FOR SEVERE WEATHER...THOUGH SOME RAINFALL REPORTS MAY BE REQUIRED NEAR THE STRONGEST SHOWERS OR THUNDERSTORMS. IF LOCALIZED HEAVY RAIN OCCURS...THERE MAY BE SOME RAPID RISES ON STREAMS. INFORMATION REGARDING WATER OVER ROADS OR BRIDGES SHOULD BE CONVEYED TO THE NATIONAL WEATHER SERVICE OFFICE IN DES MOINES. SEARCY
Special weather statement, Jun 17, 5:20 AM CDT, 4 hours 11 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-171700- CENTRAL IOWA THUNDERSTORM OUTLOOK...CORRECTED AREA OF CONCERN... NATIONAL WEATHER SERVICE DES MOINES IA 520 AM CDT WED JUN 17 1998 HAZARD--SCATTERED THUNDERSTORMS WITH SMALL HAIL...WINDS TO 50 MPH AND VERY LOCALIZED HEAVY RAINFALL. TIMING AND AREA OF CONCERN--THROUGH NOON...WEST OF A LINE FROM WATERLOO...TO NEWTON...TO CORYDON. METEOROLOGICAL COMMENTS--EARLY THIS MORNING...A NARROW ZONE OF LIFT CAUSED BY MID-LEVEL WARM AIR ADVECTION EXTENDED FROM SOUTHEAST SOUTH DAKOTA INTO SOUTHWEST IOWA. SCATTERED SHOWERS AND THUNDERSTORMS HAD DEVELOPED IN THIS AREA AND WERE MOVING NORTHEAST AROUND 30 MPH. RAINFALL AMOUNTS OVER FAR SOUTHWEST IOWA HAVE GENERALLY BEEN IN THE ONE TO TWO TENTHS OF AN INCH RANGE DURING A THREE HOUR PERIOD... HOWEVER ISOLATED AMOUNTS UP TO ONE-HALF TO THREE-QUARTERS OF AN INCH CANNOT BE RULED OUT THIS MORNING. WITH ALL THE RAIN THAT HAS FALLEN RECENTLY OVER A LARGE PART OF IOWA...DITCHES MAY RAPIDLY FILL IN THOSE AREAS THAT RECEIVE THE MOST RAIN THIS MORNING. SOME QUICK RISES ON SMALL STREAMS COULD ALSO OCCUR BUT LARGER CREEKS AND RIVERS SHOULD NOT BE EFFECTED DUE TO THE RELATIVELY FAST MOVEMENT OF THE PRECIPITATION. ADDITIONALLY...SOME STRONG WIND GUSTS AND SMALL HAIL MAY OCCUR...BUT THESE SHOULD REMAIN BELOW SEVERE LIMITS. PRECAUTIONS--SPOTTER ACTIVATION WILL SHOULD NOT BE NECESSARY TODAY FOR SEVERE WEATHER...THOUGH SOME RAINFALL REPORTS MAY BE REQUIRED NEAR THE STRONGEST SHOWERS OR THUNDERSTORMS. IF LOCALIZED HEAVY RAIN OCCURS...THERE MAY BE SOME RAPID RISES ON STREAMS. INFORMATION REGARDING WATER OVER ROADS OR BRIDGES SHOULD BE CONVEYED TO THE NATIONAL WEATHER SERVICE OFFICE IN DES MOINES. SEARCY
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 8:55 AM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 30 min |
| Jun 17, 9:16 AM CDT | Severe Thunderstorm Warning | DMX | Madison | 34 min |
| Jun 17, 10:32 AM CDT | Severe Thunderstorm Warning | DMX | Lucas | 33 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.