Alert archive / Iowa / Tornado Warnings in 1989
Tornado Warning 2, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Apr 27, 1989, 7:57 PM CDT for Harrison County, Iowa. It was in force for 33 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
- Apr 27, 1989, 7:57 PM CDT (00:57 UTC)
- Expired
- Apr 27, 1989, 8:30 PM CDT
- In force
- 33 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Harrison 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 |
|---|---|---|---|
| Apr 27, 8:30 PM CDT | Thunderstorm Wind 50 | Harrison, 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, 1.0 hours before the alert went out and 61 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.
- Mixed-layer CAPE
- 17 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 3565 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KOMA 280057
TOROMA
IAC085-280130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA NE
757 PM CDT THU APR 27 1989
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE WEST CENTRAL PART OF IOWA
HARRISON
AT 755 PM CDT A TORNADO WAS OM THE GROUND IN EXTERME WESTERN
POTTAWATOMIE COUNTY OF IOWA MOVING NORTHEAST AT 40 MPH TOWARD
SOUTHWESTERN HARRISON COUNTY OF IOWA. TAKE COVER NOW WHILE THERE IS
STILL TIME.
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 TAKE COVER IMMEDIATELY
TO SAVE YOUR LIVES.
DAMAGE REPORTS OR OBSERVED SEVERE WEATHER SHOULD BE GIVEN TO A LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
IN ADDITION TO THE THREAT OF TORNADOES...LARGE HAIL...DANGEROUS
LIGHTNING AND VERY HEAVY RAIN ARE LIKELY WITH THIS STORM.
SEELEYWhat 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, Apr 27, 5:47 PM CDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 545 PM CDT THU APR 27 1989 STRONG THUNDERSTORMS IN NORTHEAST NEBRASKA AT 540 PM CDT VERY STRONG THUNDERSTORMS WERE DEVELOPING FROM JUST SOUTH OF NORFOLK TO NEAR LINCOLN. THE STORMS WERE MOVING NORTH AT 30 MPH AND EXTENDED FROM THE NORFOLK AREA TO AROUND COLUMBUS NEBRASKA. SMALL HAIL ALONG WITH SOME HEAVY RAIN...DANGEROUS LIGHTNING AND WIND GUST TO ABOUT 50 MPH AS BEEN REPORTED AT C OLUMBUS...NORFOLK..MONROE AND HUMPHREY DURING THE PAST 30 MINUTES. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN NEBRASKA UNTIL 8 PM CDT. GBX
Special weather statement, Apr 27, 5:55 PM CDT, 2 hours 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 550 PM CDT THU APR 27 1989 STRONG THUNDERSTORMS IN NORTHEAST NEBRASKA AT 540 PM CDT VERY STRONG THUNDERSTORMS WERE DEVELOPING FROM JUST SOUTH OF NORFOLK TO NEAR LINCOLN. THE STORMS WERE MOVING NORTH AT 30 MPH. SMALL HAIL ALONG WITH SOME HEAVY RAIN...DANGEROUS LIGHTNING AND WIND GUST TO ABOUT 50 MPH AS BEEN REPORTED AT COLUMBUS...NORFOLK..MONROE AND HUMPHREY DURING THE PAST 30 MINU2TES. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN NEBRASKA UNTIL 8 PM CDT. GBX
Local storm report, Apr 27, 6:01 PM CDT, 1 hour 56 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE LINCOLN NE 600 PM CDT THU APR 27 1989 540 PM CDT FEW WIND GUSTS TO 47 KTS/54 MPH...PEA SIZE HAIL. 535 PM CDT MILFORD 17WSW OF LNK...MARBLE SIZE HAIL. DA;VIS
Special weather statement, Apr 27, 6:38 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 635 PM CDT THU APR 27 1989 AT 630 PM CDT INTENSE THUNDERSTORMS WERE SCATTERED ACROSS NORTHEAST NEBRASKA FROM 60 MILES NORTHWEST AND NORTH OF NORFOLK OR FROM NIOBRARA AND NEAR YANKTON... TO 40 MILES SOUTHEAST OF NORFOLK NEAR WEST POINT. THE STRONGEST STORMS WERE LOCATED ABOUT 30 MILES SOUTH OF YANKTON... MOVING NORTHEAST 35 MPH. THIS STORM COULD PRODUCE MARBLE SIZE HAIL AS IT PASSES ACROSS HARTINGTON AND WYNOT BY 645 PM CDT. THE OTHER STORMS WERE MOVING NORTHEAST AT 35 MPH AND SHOULD REACH AND SIOUX CITY BY 700 PM. ANOTHER BATCH OF THUNDERSTORMS WAS MOVING NORTH FROM WEST OF COLUMBUS SOUTH TO THE KANSAS BORDER. A TORNADO sWATCH REMAINS IN EFFECT FOR MUCH OF EASTERN NEBRASKA UNTIL 800 PM CDT. SMITH
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:22 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 68 min |
| Apr 27, 7:29 PM CDT | Tornado Warning | OAX | Pottawattamie | 31 min |
| Apr 27, 7:52 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 68 min |
| Apr 27, 8:27 PM CDT | Tornado Warning | OAX | Fremont | 33 min |
| Apr 27, 8:58 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 62 min |
| Apr 27, 9:00 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 60 min |
| Apr 27, 9:42 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 63 min |
Nearby
Tornado Warnings in Iowa, 1989Every tornado warning in 1989Tornadoes in 1989
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.