Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 162, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 14, 1998, 1:10 AM CDT for Adams County, Taylor County, Iowa. It was in force for 35 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
- Jun 14, 1998, 1:10 AM CDT (06:10 UTC)
- Expired
- Jun 14, 1998, 1:45 AM CDT
- In force
- 35 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Adams County, IA, Taylor County, IA
The radar
The Des Moines radar (KDMX), 125 km from the middle of the area, began a volume at 06:09 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 |
|---|---|---|---|
| Jun 14, 1:43 AM CDT | Thunderstorm Wind 61 | New Market, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 13, 8:05 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 6.2 hours before the alert went out and 148 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
- 382 J/kg
- Mixed-layer CIN
- -388 J/kg
- Mixed-layer LCL
- 1731 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
765 WUUS1 KDSM 140609 RRA SVRDSM IAC003-173-140645- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 110 AM CDT SUN JUN 14 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ADAMS COUNTY IN SOUTHWESTERN IOWA TAYLOR COUNTY IN SOUTHWESTERN IOWA * UNTIL 145 AM CDT * AT 108 AM CDT... DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 45 MILES EAST SOUTHEAST OF OMAHA OR 15 MILES WEST OF NODAWAY MOVING EAST AT 45 MPH. * THIS STORM CAN BE EXPECTED NEAR... NEW MARKET BY 117 AM CDT NODAWAY BY 117 AM CDT GRAVITY BY 127 AM CDT CORNING BY 127 AM CDT BEDFORD BY 127 AM CDT LENOX BY 140 AM CDT GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SMITH
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 13, 9:30 PM CDT, 3 hours 40 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-140900- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 930 PM CDT SAT JUN 13 1998 HAZARD--THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS...HAIL AND HEAVY RAINFALL. AREA OF CONCERN--THE SOUTHWEST THIRD OF IOWA...SOUTHWEST OF A CARROLL TO CRESTON TO LAMONI LINE FOR SEVERE THUNDERSTORMS. HEAVY RAIN POTENTIAL SOUTHWEST OF A STORM LAKE TO FORT DODGE TO MARSHALLTOWN. TIMING DETAILS--THUNDERSTORMS WERE OVER SOUTHEAST IOWA AT 930 PM. THEY WILL CONTINUE TO SPREAD NORTHEAST TONIGHT REACHING DES MOINES BY 11 PM. THUNDERSTORMS SHOULD REACH NORTHERN IOWA AFTER MIDNIGHT. METEOROLOGICAL COMMENTS--A LOW PRESSURE SYSTEM WAS CENTERED OVER NORTHERN KANSAS AT 9 PM. IT IS FORECAST TO MOVE NORTHEAST INTO SOUTHWEST IOWA BY MORNING. THE AIRMASS OVER IOWA WILL BECOME UNSTABLE TONIGHT AS LOW-LEVEL MOISTURE MOVES INTO THE STATE. THE MOST UNSTABLE AIR WILL BE FOUND OVER SOUTHWEST IOWA. THUNDERSTORMS IN THIS AREA MAY REACH SEVERE LIMITS BEFORE 2 AM WITH THE PRIMARY THREAT BEING LARGE HAIL AND DAMAGING WINDS. THE THUNDERSTORMS WILL LIKELY PRODUCE WIDESPREAD RAINFALL OF AN INCH IN SOUTHWEST HALF OF IOWA WITH LOCAL AMOUNTS UP TO TWO INCHES. PRECAUTIONS--SPOTTER ACTIVATION MAY BE NEEDED TONIGHT ACROSS SOUTHWEST. IN ADDITION...A FLASH FLOOD WATCH IS IN EFFECT FOR THE SOUTHWEST HALF OF IOWA SO PEOPLE SHOULD AVOID FLOOD PRONE AREAS. JOHNSON
Special weather statement, Jun 13, 9:30 PM CDT, 3 hours 40 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-140900- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 930 PM CDT SAT JUN 13 1998 HAZARD--THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS...HAIL AND HEAVY RAINFALL. AREA OF CONCERN--THE SOUTHWEST THIRD OF IOWA...SOUTHWEST OF A CARROLL TO CRESTON TO LAMONI LINE FOR SEVERE THUNDERSTORMS. HEAVY RAIN POTENTIAL SOUTHWEST OF A STORM LAKE TO FORT DODGE TO MARSHALLTOWN. TIMING DETAILS--THUNDERSTORMS WERE OVER SOUTHEAST IOWA AT 930 PM. THEY WILL CONTINUE TO SPREAD NORTHEAST TONIGHT REACHING DES MOINES BY 11 PM. THUNDERSTORMS SHOULD REACH NORTHERN IOWA AFTER MIDNIGHT. METEOROLOGICAL COMMENTS--A LOW PRESSURE SYSTEM WAS CENTERED OVER NORTHERN KANSAS AT 9 PM. IT IS FORECAST TO MOVE NORTHEAST INTO SOUTHWEST IOWA BY MORNING. THE AIRMASS OVER IOWA WILL BECOME UNSTABLE TONIGHT AS LOW-LEVEL MOISTURE MOVES INTO THE STATE. THE MOST UNSTABLE AIR WILL BE FOUND OVER SOUTHWEST IOWA. THUNDERSTORMS IN THIS AREA MAY REACH SEVERE LIMITS BEFORE 2 AM WITH THE PRIMARY THREAT BEING LARGE HAIL AND DAMAGING WINDS. THE THUNDERSTORMS WILL LIKELY PRODUCE WIDESPREAD RAINFALL OF AN INCH IN SOUTHWEST HALF OF IOWA WITH LOCAL AMOUNTS UP TO TWO INCHES. PRECAUTIONS--SPOTTER ACTIVATION MAY BE NEEDED TONIGHT ACROSS SOUTHWEST. IN ADDITION...A FLASH FLOOD WATCH IS IN EFFECT FOR THE SOUTHWEST HALF OF IOWA SO PEOPLE SHOULD AVOID FLOOD PRONE AREAS. JOHNSON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 1:42 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 33 min |
| Jun 14, 2:06 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Union | 49 min |
| Jun 14, 8:56 AM CDT | Flash Flood Warning | DMX | Cass | 3 hr |
| Jun 14, 2:35 PM CDT | Tornado Warning | DMX | Davis | 45 min |
| Jun 14, 6:32 PM CDT | Flash Flood Warning | DMX | Audubon, Cass | 11 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.