Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 43, NWS Des Moines, IA

July 9, 1990Decatur County, Ringgold County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 9, 1990, 6:13 PM CDT for Decatur County, Ringgold County, Iowa. It was in force for 62 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
Jul 9, 1990, 6:13 PM CDT (23:13 UTC)
Expired
Jul 9, 1990, 7:15 PM CDT
In force
62 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Decatur County, IA, Ringgold 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
Jul 9, 6:30 PM CDTThunderstorm Wind 50Decatur, 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

Omaha, NE (KOAX), launched 12:00Z, 11.2 hours before the alert went out and 208 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 1990-07-09Temperature 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 1990-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 square meters per square second.1939Sfc1 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
3648 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
323 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 092313
TORDSM
IAC053-159-100015-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
613 PM CDT MON JUL 9 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH CENTRAL IOWA
          ...WESTERN DECATUR...EASTERN RINGGOLD
 
AT 608 PM...WEATHER RADAR AND PUBLIC REPORTS INDICATE A TORNADO NEAR
THE TOWN KELLERTON...OR ABOUT 60 MILES SOUTH SOUTHWEST OF DES MOINES.
THE STORM WAS MOVING EAST NORTHEAST AT 10 MILES AN HOUR.
 
THIS WARNING INCLUDES THE TOWNS OF BEACONSFIELD...KELLERTON...
GRAND RIVER...LAMONI AND DECATUR CITY.  THIS COVERS THAT PART OF
INTERSTATE 80 BETWEEN MARKERS ZERO AND 22.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 6:57 PM CDTSevere Thunderstorm WarningDMXWayne48 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.