Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 37, NWS Des Moines, IA

June 28, 1990Iowa County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 28, 1990, 2:51 PM CDT for Iowa County, Iowa. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1990, 2:51 PM CDT (19:51 UTC)
Expired
Jun 28, 1990, 3:30 PM CDT
In force
39 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Iowa County, IA

The radar

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.9 hours before the alert went out and 361 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, Omaha, NE at 12:00Z on 1990-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Omaha, NE at 12:00Z on 1990-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 199 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3656 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
199 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 281951
TORDSM
IAC011-095-282030-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
251 PM CDT THU JUN 28 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN EAST CENTRAL IOWA
          ...SOUTHERN BENTON...NORTHERN IOWA
 
AT 248 PM...A TORNADO WAS REPORTED JUST SOUTHWEST OF VAN HORNE IN
SOUTHERN BENTON COUNTY...OR ABOUT 25 MILES WEST OF CEDAR RAPIDS.
 
THE STORM PRODUCING THE TORNADO WAS MOVING SOUTHEAST AT 35 MILES AN
HOUR...AND WILL BE AFFECTING THE CITIES OF BLAIRSTOWN...NORWAY...
MARENGO...AND THE AMANA COLONIES.
 
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.  AVOI,D WINDOWS.
 
TRUETT/MYERS

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, 1:09 PM CDTTornado WarningDMXHardin36 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 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; the sounding from the Mesonet's radiosonde archive.