Alert archive / Iowa / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 226, NWS Des Moines, IA

June 29, 1998Calhoun County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1998, 12:24 PM CDT for Calhoun County, Iowa. It was in force for 36 min. 2 reports 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 29, 1998, 12:24 PM CDT (17:24 UTC)
Expired
Jun 29, 1998, 1:00 PM CDT
In force
36 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Calhoun County, IA

The radar

The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 17:26 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

TimeReportWhereRemark
Jun 29, 12:30 PM CDTThunderstorm Wind 52Rockwell City, IA
Jun 29, 12:35 PM CDTHail 1Rockwell City, 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.

IssuedProductOfficeLasted
Jun 29, 11:15 AM CDTTornado WatchSPC6 hr

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, Jun 29, 6:26 AM CDT, 5 hours 58 minutes before
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Special weather statement, Jun 29, 10:38 AM CDT, 1 hour 46 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-292100-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1038 AM CDT MON JUN 29 1998

HAZARD--SCATTERED TO NUMEROUS THUNDERSTORMS...SOME PRODUCING SEVERE
WEATHER INCLUDING DAMAGING WINDS...LARGE HAIL AND TORNADOES.

AREA OF CONCERN AND TIMING DETAILS--WEST OF A WAVERLY--FORT DODGE--
CRESTON LINE THROUGH 200 PM...THEN SPREADING EAST THROUGHOUT THE REST
OF IOWA DURING THE MID TO LATE AFTERNOON.

METEOROLOGICAL COMMENTS--A FRONTAL BOUNDARY IS BECOMING MORE
ESTABLISHED FROM NEAR DECORAH TO NEAR SIOUX CITY TO A LOW PRESSURE
CENTER IN SOUTHWEST NEBRASKA.  ISOLATED SEVERE THUNDERSTORMS WERE
ALREADY DEVELOPING IN NORTHEAST NEBRASKA...WEST OF SIOUX CITY.
OTHER STORMS WERE EXPANDING OVER NORTH CENTRAL AND NORTHWEST IOWA
WHICH ARE EXPECTED TO INTENSIFY.  PLENTIFUL MOISTURE AND
INSTABILITY IS AVAILABLE FOR STRONG STORM UPDRAFTS.  STORM-
RELATIVE WIND SHEAR IS QUITE FAVORABLE FOR THE DEVELOPMENT AND
MAINTENANCE OF SUPERCELL THUNDERSTORMS WITH ROTATION...THUS THE
ISOLATED TORNADO THREAT.  AS TEMPERATURES HEAT UP OVER CENTRAL
IOWA...INSTABILITY WILL CONTINUE TO INCREASE WITH CAPE VALUES UP TO
5000 JOULES PER KILOGRAM.

PRECAUTIONS--SPOTTER GROUPS WILL LIKELY BE NEEDED THIS AFTERNOON.  A
SEVERE WEATHER WATCH IS BEING CONSIDERED FOR MUCH OF THE AREA OF
CONCERN ALSO IN THE NEXT 1 OR 2 HOURS.  KEEP ABREAST OF FURTHER
UPDATES AND PAY ATTENTION TO NWS SHORT TERM FORECASTS FOR ADDITIONAL
INFORMATION.

KULA

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 12:18 PM CDTSevere Thunderstorm WarningDMXCarroll47 min
Jun 29, 12:32 PM CDTTornado WarningDMXHamilton33 min
Jun 29, 12:37 PM CDTSevere Thunderstorm WarningDMXWebster48 min
Jun 29, 12:41 PM CDTTornado WarningDMXCrawford49 min
Jun 29, 12:59 PM CDTSevere Thunderstorm WarningDMXHardin51 min
Jun 29, 1:09 PM CDTSevere Thunderstorm WarningDMXStory36 min
Jun 29, 1:17 PM CDTSevere Thunderstorm WarningDMXBoone33 min
Jun 29, 1:20 PM CDTSevere Thunderstorm WarningDMXMarshall50 min
Jun 29, 1:23 PM CDTTornado WarningDMXBoone, Dallas32 min
Jun 29, 1:32 PM CDTTornado WarningDMXPolk33 min
Jun 29, 1:39 PM CDTSevere Thunderstorm WarningDMXDallas31 min
Jun 29, 1:44 PM CDTSevere Thunderstorm WarningDMXJasper, Tama46 min
Jun 29, 1:48 PM CDTTornado WarningDMXDallas, Madison47 min
Jun 29, 1:53 PM CDTSevere Thunderstorm WarningDMXWarren32 min
Jun 29, 2:04 PM CDTSevere Thunderstorm WarningDMXPolk21 min
Jun 29, 2:08 PM CDTSevere Thunderstorm WarningDMXPoweshiek47 min
Jun 29, 2:08 PM CDTSevere Thunderstorm WarningDMXMarion47 min
Jun 29, 2:11 PM CDTSevere Thunderstorm WarningDMXMadison34 min
Jun 29, 2:18 PM CDTTornado WarningDMXTama32 min
Jun 29, 2:23 PM CDTTornado WarningDMXMarion32 min
Jun 29, 2:28 PM CDTSevere Thunderstorm WarningDMXLucas, Mahaska, Monroe62 min
Jun 29, 2:28 PM CDTSevere Thunderstorm WarningDMXClarke, Warren62 min
Jun 29, 2:44 PM CDTSevere Thunderstorm WarningDMXWapello66 min
Jun 29, 2:55 PM CDTSevere Thunderstorm WarningDMXAppanoose, Davis65 min
Jun 29, 3:10 PM CDTTornado WarningDMXDavis35 min
Jun 29, 3:25 PM CDTTornado WarningDMXDallas50 min
Jun 29, 3:27 PM CDTSevere Thunderstorm WarningDMXGuthrie48 min
Jun 29, 3:40 PM CDTTornado WarningDMXPolk35 min
Jun 29, 3:47 PM CDTTornado WarningDMXWarren33 min
Jun 29, 4:05 PM CDTSevere Thunderstorm WarningDMXJasper, Marion50 min
Jun 29, 5:41 PM CDTSevere Thunderstorm WarningDMXClarke49 min
Jun 29, 5:44 PM CDTSevere Thunderstorm WarningDMXTaylor51 min
Jun 29, 6:00 PM CDTSevere Thunderstorm WarningDMXRinggold35 min
Jun 29, 6:19 PM CDTSevere Thunderstorm WarningDMXDecatur66 min
Jun 29, 6:25 PM CDTSevere Thunderstorm WarningDMXAppanoose, Wayne65 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; verification from NCEI's Storm Data; radar from the NEXRAD Level II archive.