Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 6, NWS Omaha, NE

June 7, 1990Pottawattamie County, Iowa

NWS Omaha, NE issued this tornado warning at Jun 7, 1990, 10:07 AM CDT for Pottawattamie County, Iowa. It was in force for 38 min. 2 reports 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 7, 1990, 10:07 AM CDT (15:07 UTC)
Expired
Jun 7, 1990, 10:45 AM CDT
In force
38 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Pottawattamie 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
Jun 7, 10:13 AM CDTThunderstorm Wind 50Pottawattamie, IA
Jun 7, 10:15 AM CDTThunderstorm Wind 50Pottawattamie, 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, 3.1 hours before the alert went out and 69 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 1990-06-07Temperature 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 1990-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 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
3632 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
123 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 071512 COR
TOROMA
NEC021-IAC155-071545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED
NATIONAL WEATHER SERVICE OMAHA NE
1007 AM CDT THU JUN 7 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 1045 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE EAST CENTRAL PART OF NEBRASKA
      DOUGLAS...INCLUDING THE OMAHA METROPOLITAN AREA...

   IN THE WEST CENTRAL PART OF IOWA
      POTTAWATTAMIE...INCLUDING THE CITY OF COUNCIL BLUFFS...

...THIS WARNING INCLUDES THE OMAHA/COUNCIL BLUFFS METROPOLITAN
    AREA...

AT 1000 AM...A POSSIBLE TORNADO WAS MOVING THROUGH MILLARD IN
SOUTHERN DOUGLAS COUNTY.  THE POSSIBLE TORNADO WAS MOVING NORTHEAST
AND WILL THROUGH OMAHA.   RADAR INDICATED A POSSIBLE TORNADO OVER
POTTAWATEME COUNTY NEAR COUNCIL BLUFFS.

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.

IF YOU ARE CAUGHT IN THE OPEN...TRY TO HIDE IN A DEPRESSION...LIKE
A DITCH OR A CULVERT.  COVER YOUR HEAD WITH YOUR HANDS.

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.

...CORRECTION...

BURT COUNTY IS NOT IN A TORNADO WARNING.  DOUGLAS AND POTTAWATTAMIE
COUNTI$ES ARE UNDER THE TORNADO WARNING.
SEELEY

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 7, 7:12 AM CDT, 2 hours 55 minutes before
NEZ003-004-007-008-009-071300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
710 AM CDT THU JUN 7 1990

...SHOWERS AND A FEW ISOLATED THUNDERSHOWERS IN PARTS OF NORTHEAST AND
MUCH OF NORTHCENTRAL NEBRASKA THIS MORNING...

AT 705 AM CDT NORFOLK RADAR SHOWED SCATTERED SHOWERS AND A FEW ISOLATED
THUNDERSHOWERS IN MUCH OF NORTHCENTRAL NEBRASKA AND A FEW SHOWERS IN
NORTHEAST NEBRASKA.  BRIEF HEAVY RAIN...AND GUSTY WINDS WILL BE POSSIBLE
WITH THESE SHOWERS AND THUNDERSHOWERS AS THEY MOVE EAST DURING THE NEXT
HOUR.  THE PRECIPIATION WAS SPREADING EAST AT AROUND 30 MPH AND SHOULD
BE IN MUCH OF NORTHEAST NEBRASKA BY AROUND 830 AM CDT.

MILLER
Special weather statement, Jun 7, 8:51 AM CDT, 1 hour 16 minutes before
NEZ015-19-071430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN NE
845 AM CDT THU JUN 7 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF
SOUTHEAST NEBRASKA THIS MORNING.
A LINE OF STRONG THUNDERSTORMS ARE MOVING ACROSS SOUTHEAST NEBRASKA.
AT 845 AM CDT RADAR SHOWED THE LINE EXTENDING FROM SOUTHEAST JEFFERSON
COUNTY TO THE NORTH AND NORTHWEST INTO SOUTHERN YORK COUNTY. THE
THUNDERSTORMS ARE MOVING TO THE EAST NORTHEAST AT 30 MPH.
AT 840 AM CDT FAIRBURY WHICH IS 55 SSW OF LINCOLN REPORTED HEAVY RAIN
AND PEA SIZE HAIL. AT 845 AM CDT HEAVY RAIN WAS REPORTED AT FRIEND
WHICH IS 32 MILES WSW OF LINCOLN VISIBILITY NEAR ZERO AT TIMES.
THESE STORMS ARE MOVING TOWARD THE LINCOLN AREA AND COULD REACH THIS
AREA BY 930 TO 10 AM CDT. THE STORMS ARE CAPABLE OF PRODUCING VERY
HEAVY RAIN AND HAIL IS ALSO POSSIBLE AS THE STORMS MOVE ACROSS
SOUTHEAST NEBRASKA.
JB
Special weather statement, Jun 7, 9:13 AM CDT, 54 minutes before
NEZ015-19-071500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN NE
910 AM CDT THU JUN 7 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF
SOUTHEAST NEBRASKA THIS MORNING.

AT 910 AM CDT RADAR SHOWED THE LINE OF THUNDERSTORMS MOVING THROUGH
SOUTHEAST NEBRASKA HAS INCREASED IN INTENSITY SINCE 845 AM CDT.
AT 910 AM CDT THE LINE EXTENDED FROM NORTHWEST SEWARD COUNTY
THROUGH SOUTHWEST LANCASTER COUNTY AND INTO CENTRAL GAGE COUNTY.
THESE STORMS HAVE BEEN PRODUCING VERY HEAVY RAIN AND UP TO MARBLE SIZE
HAIL. THE STORMS ARE MOVING RAPIDLY TO THE EAST NORTHEAST AT 60 MPH.
HEAVY RAIN IS EXPECTED TO MOVE INTO THE LINCOLN BY 930 AM CDT.
THE STORMS WILL PRODUCE HEAVY RAIN ACROSS SEWARD LANCASTER GAGE
COUNTIES AND WILL MOVE INTO JOHNSON AND PAWNEE COUNTIES BY 10 AM CDT.
JB
Special weather statement, Jun 7, 9:18 AM CDT, 49 minutes before
NEZ003-004-007-008-009-071500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
910 AM CDT THU JUN 7 1990

...SHOWERS AND A FEW STRONG THUNDERSTORMS IN PARTS OF NORTHEAST AND
NORTH CENTRAL NEBRASKA THIS MORNING...

AT 910 AM CDT NORFOLK RADAR INDICATED A RATHER STRONG THUNDERSTORM
ENTERING WESTERN BOONE COUNTY WEST OF CEDAR RAPIDS...OR ABOUT 50 MILES
SOUTHWEST OF NORFOLK.  THIS STORM WILL LIKELY PRODUCE HEAVY RAIN AND
SOME GUSTY WINDS AS IT CONTINUES MOVING EAST AT 30 MPH THROUGH BOONE
COUNTY IN THE NEXT HOUR.

OTHER SHOWERS AND THUNDERSTORMS EXTENDED FROM THE NEBRASKA-SOUTH DAKOTA
BORDER NORTH OF ONEILL TO ABOUT 10 MILES WEST OF COLUMBUS THEN FURTHER
SOUTHEAST TO LINCOLN.

KLEFFMAN
Special weather statement, Jun 7, 9:32 AM CDT, 35 minutes before
NEZ010-015-019-020-071530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
925 AM CDT THU JUN 7 1990

...PARTS OF SEVERE THUNDERSTORM WATCH 407 HAVE BEEN CANCELLED...

SEVERE THUNDERSTORM W
Special weather statement, Jun 7, 9:46 AM CDT, 21 minutes before
NEZ015-19-071530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN NE
945 AM CDT THU JUN 7 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF
SOUTHEAST NEBRASKA THIS MORNING.

THE LINE OF STRONG THUNDERSTORMS MOVING RAPIDLY THROUGH SOUTHEAST
NEBRASKA HAS BEGUN TO DECREASE IN INTENSITY AS IT MOVES TO THE
EAST NORTHEAST. AT 940 AM CDT THE STRONGEAT STORMS WERE LOCATED
FROM NORTHEAST BUTLER COUNTY INTO SAUNDERS COUNTY AND EXTENDS SOUTH
THROUGH CASS OTOE AND INTO JOHNSON AND PAWNEE COUNTIES. THE STORMS
CONTINUE TO PRODUCE VERY HEAVY RAIN SOME HAIL AND HIGH WIND.
THE STORMS ARE MOVING TO THE EAST NORTHEAST AT 50 TO 60 MPH.
LIGHT RAIN IS EXPECTED TO CONTINUE THIS MORNING BEHIND THE LINE
OF STRONG THUNDERSTORMS.
JB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 10:21 AM CDTTornado WarningOAXFremont29 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.