Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 13, NWS Des Moines, IA

June 13, 1990Union County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 13, 1990, 10:10 PM CDT for Union County, Iowa. It was in force for 50 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 13, 1990, 10:10 PM CDT (03:10 UTC)
Expired: Jun 13, 1990, 11:00 PM CDT
In force: 50 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Union 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

Time	Report	Where	Remark
Jun 13, 11:05 PM CDT	Thunderstorm Wind 52	Union, 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 00:00Z, 3.2 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3606 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 113 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 140310
TORDSM
IAC175-001-003-140400-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1010 PM CDT WED JUN 13 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1100 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH CENTRAL IOWA
          ...NORTHWESTERN UNION
IN SOUTHWEST IOWA
          ...SOUTHEASTERN ADAIR...NORTHEASTERN ADAMS
 
AT 1005 PM RADAR INDICATED A POSSIBLE TORNADO NEAR THE
ADAIR...ADAMS...AND UNION COUNTY BORDERS ABOUT 10 MILES SOUTH OF
GREENFIELD OR 40 SOUTHWEST OF DES MOINES.
 
SOME TOWNS TO BE AFFECTED BY THIS STORM ARE
CRESTON...ORIENT...NEVINIVELLE AND GREENFIELD.
 
THE STORM IS MOVING SOUTHEAST AT ABOUT 15 MPH.
 
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 F)LOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
LNE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 9:27 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	63 min
Jun 13, 10:10 PM CDT	Tornado Warning	DMX	Adair, Adams	20 min
Jun 13, 10:50 PM CDT	Tornado Warning	DMX	Union	40 min
Jun 13, 10:53 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	67 min
Jun 13, 11:27 PM CDT	Tornado Warning	DMX	Polk	33 min
Jun 14, 12:33 AM CDT	Tornado Warning	DMX	Jasper	42 min

Nearby

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