Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 34, NWS Des Moines, IA

June 28, 1990Hardin County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 28, 1990, 1:09 PM CDT for Hardin 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 28, 1990, 1:09 PM CDT (18:09 UTC)
Expired
Jun 28, 1990, 1:45 PM CDT
In force
36 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Hardin County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jun 28, 1:25 PM CDTTornado F3Hardin, IA
Jun 28, 1:35 PM CDTTornado F0Hardin, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 6.2 hours before the alert went out and 276 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1990-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1990-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 298 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
102 J/kg
Mixed-layer CIN
-411 J/kg
Mixed-layer LCL
772 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
298 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 281810
TORDSM
IAC083-281845-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
109 PM CDT THU JUN 28 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  145 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL IOWA
          ...NORTHEAST HALF OF HARDIN
 
AT 107 PM...A POSSIBLE TORNADO WAS INDICATED BY RADAR ALONG THE
HARDIN-FRANKLIN COUNTY LINE...JUST NORTHEAST OF THE IOWA FALLS AREA.
THERE HAS ALSO BEEN AN UNCONFIRMED TORNADO REPORT IN THIS VICINITY
AS WELL.  THIS IS ABOUT 45 MILES WEST OF WATERLOO.
 
THE STORM WAS MOVING SOUTHEAST AT 40 MILES AN HOUR...AND WILL BE
AFFECTING THE CITIES OF IOWA FALLS...ACKLEY..AND ELDORA.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
TRUETT/BARLOW

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 1:12 AM CDTSevere Thunderstorm WarningDMXClay63 min
Jun 28, 1:37 AM CDTSevere Thunderstorm WarningDMXBuena Vista68 min
Jun 28, 1:53 AM CDTSevere Thunderstorm WarningDMXPocahontas67 min
Jun 28, 2:11 AM CDTSevere Thunderstorm WarningDMXCalhoun, Sac64 min
Jun 28, 2:11 AM CDTSevere Thunderstorm WarningDMXPalo Alto64 min
Jun 28, 2:24 AM CDTSevere Thunderstorm WarningDMXHumboldt66 min
Jun 28, 2:52 AM CDTSevere Thunderstorm WarningDMXCalhoun, Webster68 min
Jun 28, 4:23 AM CDTSevere Thunderstorm WarningDMXCarroll, Greene52 min
Jun 28, 5:10 AM CDTSevere Thunderstorm WarningDMXDallas35 min
Jun 28, 7:06 AM CDTSevere Thunderstorm WarningDMXMonroe32 min
Jun 28, 10:32 AM CDTSevere Thunderstorm WarningDMXEmmet43 min
Jun 28, 11:02 AM CDTSevere Thunderstorm WarningDMXKossuth43 min
Jun 28, 11:40 AM CDTSevere Thunderstorm WarningDMXHancock, Winnebago50 min
Jun 28, 11:43 AM CDTSevere Thunderstorm WarningDMXKossuth32 min
Jun 28, 12:15 PM CDTSevere Thunderstorm WarningDMXWright30 min
Jun 28, 12:24 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin51 min
Jun 28, 1:09 PM CDTSevere Thunderstorm WarningDMXButler51 min
Jun 28, 1:09 PM CDTSevere Thunderstorm WarningDMXFranklin26 min
Jun 28, 1:26 PM CDTSevere Thunderstorm WarningDMXGrundy54 min
Jun 28, 1:42 PM CDTSevere Thunderstorm WarningDMXBlack Hawk48 min
Jun 28, 1:44 PM CDTTornado WarningDMXHardin31 min
Jun 28, 1:56 PM CDTSevere Thunderstorm WarningDMXMarshall, Tama30 min
Jun 28, 2:13 PM CDTSevere Thunderstorm WarningDMXBenton47 min
Jun 28, 2:23 PM CDTTornado WarningDMXPoweshiek, Tama37 min
Jun 28, 2:51 PM CDTTornado WarningDMXIowa39 min
Jun 28, 2:51 PM CDTTornado WarningDMXBenton23 min

Nearby

Tornado Warnings in Iowa, 1990Every tornado warning in 1990Tornadoes in 1990

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.