Alert archive / Iowa / Tornado Warnings in 1989
Tornado Warning 21, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at May 24, 1989, 10:41 PM CDT for Johnson County, Washington County, Iowa. It was in force for 23 min.
The area
The counties it named.
The facts
- Issued
- May 24, 1989, 10:41 PM CDT (03:41 UTC)
- Expired
- May 24, 1989, 11:04 PM CDT
- In force
- 23 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Johnson County, IA, Washington 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
Peoria Regional, IL (KPIA), launched 00:00Z, 3.7 hours before the alert went out and 195 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
- NaN m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 347 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 250342
TORDSM
IAC103-183-250430-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1041 PM CDT WED MAY 24 1989
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE EAST CENTRAL PART OF IOWA
EXTREME SOUTHEAST JOHNSON...
IN THE SOUTHEAST PART OF IOWA
EXTREME NORTHEAST WASHINGTON...
AT 1040 PM...WEATHER RADAR INDICATED A POSSIBLE TORNADO
ALONG THE JOHNSON...WASHINGTON COUNTY LINE ABOUT 15 MILES
SOUTHEAST OF IOWA CITY.
<
THE STORM WAS MOVING SLOWLY EAST...AT AROUND 10 MPH...AND WILL
BE AFFECTING THE CITY OF LONE TREE.
IF YOU ARE IN THE PATH OF THIS TORNADO...THE SAFEST PLACE IS IN A
BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF
NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM ON THE
LOWEST FLOOR. IF YOU ARE IN A VEHICLE OR MOBILE HOME...LEAVE IT AT
ONCE AND TAKE SHELTER IN A REINFORCED BUILDING OR IN A DITCH.
GOODSON/TRUETTThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 7:06 PM CDT | Tornado Warning | DMX | Hardin, Story | 39 min |
| May 24, 7:38 PM CDT | Tornado Warning | DMX | Decatur | 67 min |
| May 24, 7:47 PM CDT | Severe Thunderstorm Warning | DMX | Clarke | 58 min |
| May 24, 7:49 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 26 min |
| May 24, 7:55 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell | 50 min |
| May 24, 7:58 PM CDT | Tornado Warning | DMX | Marshall | 45 min |
| May 24, 8:10 PM CDT | Tornado Warning | DMX | Poweshiek, Tama | 50 min |
| May 24, 8:30 PM CDT | Severe Thunderstorm Warning | DMX | Floyd, Howard | 60 min |
| May 24, 8:31 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 59 min |
| May 24, 8:46 PM CDT | Tornado Warning | DMX | Chickasaw, Fayette, Winneshiek | 29 min |
| May 24, 8:49 PM CDT | Tornado Warning | DMX | Benton, Iowa | 56 min |
| May 24, 9:07 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 68 min |
| May 24, 9:12 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 23 min |
| May 24, 9:24 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 66 min |
| May 24, 9:48 PM CDT | Severe Thunderstorm Warning | DMX | Iowa | 27 min |
| May 24, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Washington | 46 min |
| May 24, 10:28 PM CDT | Severe Thunderstorm Warning | DMX | Johnson | 32 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; the sounding from the Mesonet's radiosonde archive.