Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 13, NWS Omaha, NE

June 13, 1990Montgomery County, Iowa

NWS Omaha, NE issued this tornado warning at Jun 13, 1990, 10:01 PM CDT for Montgomery County, Iowa. It was in force for 24 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1990, 10:01 PM CDT (03:01 UTC)
Expired
Jun 13, 1990, 10:25 PM CDT
In force
24 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Montgomery 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 00:00Z, 3.0 hours before the alert went out and 107 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 00:00Z on 1990-06-14Temperature 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 00:00Z on 1990-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939587897Sfc1 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
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 KOMA 140301
TOROMA
IAC137-155-140330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE OMAHA NE
1001 PM CDT WED JUN 13 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHWEST PART OF IOWA
      NORTHWEST MONTGOMERY...

   IN THE WEST CENTRAL PART OF IOWA
      EASTERN POTTAWATTAMIE...

AT 955 PM CDT A POSSIBLE TORNADO WAS INDICATED BY RADAR OVER
SOUTHEASTERN POTTAWATTAMIE COUNTY.  IT WAS MOVING TO THE SOUTHEAST
AT 20 MPH.

PERSONS IN THE WARNED AREA SHOULD TAKE SHELTER IN A BASEMENT IF
AVAILABLE.  OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.  CARS AND MOBILE HOMES SHOULD BE ABANDONED.

PEOPLE IN THE PATH OF THIS TORNADO SHOULD GET TO A SAFE PLACE...
SUCH AS A BASEMENT TO SAVE YOUR LIVES...THIS IS A DANGEROUS STORM.

DAMAGE REPORTS OR OBSERVED SEVERE WEATHER SHOULD BE GIVEN TO A LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE...BUT
A SAFE PLACE IS YOUR FIRST CONCERN.  DO NOT TRY TO OUTRUN A
TORNADO WITH YOUR CAR.

WATTERS

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 8:37 PM CDTTornado WarningOAXFremont, Mills38 min
Jun 13, 9:04 PM CDTTornado WarningOAXMontgomery, Page26 min
Jun 13, 9:47 PM CDTSevere Thunderstorm WarningOAXFremont, Page58 min
Jun 13, 10:01 PM CDTTornado WarningOAXPottawattamie29 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.