Alert archive / Iowa / Tornado Warnings in 1989
Tornado Warning 26, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Sep 7, 1989, 8:27 PM CDT for Crawford County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Sep 7, 1989, 8:27 PM CDT (01:27 UTC)
- Expired
- Sep 7, 1989, 9:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Crawford 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, 1.5 hours before the alert went out and 114 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3627 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 221 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 KDSM 080128
TORDSM
IAC047-080200-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
827 PM CDT THU SEP 7 1989
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 900 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL IOWA
...CRAWFORD
AT 820 PM CDT NATIONAL WEATHER SERVICE RADAR IN DES MOINES INDICATED
A VERY STRONG THUNDERSTORM OVER DENISON IN CRAWFORD COUNTY...LOCATED
ABOUT 60 MILES NORTHEAST OF OMAHA.
AT 812 PM CDT THE SHERIFF'S OFFICE FOR CRAWFORD COUNTY HAD RECEIVED
A REPORT OF A FUNNEL CLOUD JUST EAST OF DENISON.
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.
DO NOT UzSE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF
A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.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, Sep 7, 6:46 PM CDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 640 PM CDT THU SEP 7 1989 AT 635 PM..AN INTENSE THUNDERSTORM..WITH VERY HEAVY RAINS..WAS LOCATED IN CENTRAL IOWA JUST EAST OF MARSHALLTOWN...ABOUT 50 MILES NORTHEAST OF DES MOINES. VERY HEAVY RAINS...STRONG GUSTY SURFACE WINDS...AND HAIL MAY ACCOMPANY THE PASSAGE OF THIS STORM. SCATTERED SHOWERS AND THUNDERSHOWERS WERE ALSO FALLING ON MUCH OF THE REMAINDER OF EAST CENTRAL IOWA. THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE EAST AT 30 AN HOUR. SCOTT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 10:40 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 50 min |
| Sep 8, 3:38 AM CDT | Flash Flood Warning | DMX | Audubon | 4 hr |
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; the sounding from the Mesonet's radiosonde archive.