Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 10, NWS Des Moines, IA

June 12, 1990Adair County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 12, 1990, 3:44 PM CDT for Adair County, Iowa. It was in force for 22 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 12, 1990, 3:44 PM CDT (20:44 UTC)
Expired: Jun 12, 1990, 4:06 PM CDT
In force: 22 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Adair 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 12, 3:55 PM CDT	Thunderstorm Wind 50	Adair, 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, 8.7 hours before the alert went out and 159 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: 3648 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 254 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 122044
TORDSM
IAC001-122115-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
344 PM CDT TUE JUN 12 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST IOWA
          ...ADAIR
 
AT 340 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE
TORNADO MOVING INTO ADAIR COUNTY. THIS STORM WAS MOVING NORTHEAST AT
40 TO 45 MILES AN HOUR.
 
AT 330 PM...AN APPARENT TORNADO WAS OBSERVED NEAR MASSENA IN CASS
COUNTY.
 
THIS WARNING INCLUDES THE CITIES OF BRIDGEWATER...FONTANELLE...AND
GREENFIELD.
 
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.
 
DOWDm

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 4:02 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	22 min
Jun 12, 5:06 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	39 min
Jun 12, 5:18 PM CDT	Severe Thunderstorm Warning	DMX	Chickasaw	42 min
Jun 12, 5:18 PM CDT	Severe Thunderstorm Warning	DMX	Fayette	27 min
Jun 12, 6:06 PM CDT	Severe Thunderstorm Warning	DMX	Benton	19 min
Jun 12, 6:16 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Webster	44 min
Jun 12, 6:45 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	30 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.