Alert archive / Iowa / Tornado Warnings in 1988

Tornado Warning 11, NWS Des Moines, IA

August 8, 1988Lucas County, Marion County, Warren County, Iowa

NWS Des Moines, IA issued this tornado warning at Aug 8, 1988, 6:17 PM CDT for Lucas County, Marion County, Warren County, Iowa. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1988, 6:17 PM CDT (23:17 UTC)
Expired
Aug 8, 1988, 6:45 PM CDT
In force
28 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Lucas County, IA, Marion County, IA, Warren 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 12:00Z, 11.3 hours before the alert went out and 254 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 1988-08-08Temperature 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 1988-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
3648 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
127 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 KDSM 082319
TORDSM
IAC181-117-125-082345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
617 PM CDT MON AUG 8 1988

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE SOUTH CENTRAL PART OF IOWA
      EXTREME SOUTHEAST WARREN...NORTHERN LUCAS...SOUTHWEST
      MARION

RADAR INDICATED A VERY INTENSE THUNDERSTORM IN NORTHWEST LUCAS
COUNTY OF SOUTH CENTRAL IOWA.  THIS IS ABOUT 35 MILES SOUTH OF
DES MOINES.

A FUNNEL CLOUD WAS REPORTED NEAR LUCAS AROUND 610 PM CDT.
THE STORM WAS MOVING NORTHEAST AROUND 35 MILES AN HOUR.

PERSONS IN THE TOWNS OF LACONA...DALLAS...AND MELCHER SHOULD BE
ALERT FOR SEVERE WEATHER AND A POSSIBLE TORNADO.

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...SyEEK 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.

ADAMS/TRUETT

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, Aug 8, 5:50 PM CDT, 27 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
547 PM CDT MON AUG 8 1988

...SEVERE THUNDERSTORM WATCH FOR MUCH OF THE SOUTHEAST THIRD OF IOWA
   UNTIL 9 PM...

AT 530 PM CDT...AN INTENSE THUNDERSTORM WAS INDICATED OVER SOUTHEAST
IOWA 30 MILES SOUTH OF CEDAR RAPIDS.  THIS STORM WAS MOVING NORTHEAST
AT 35 MILES AN HOUR.  BY 630 PM THIS STORM SHOULD BE LOCATED 30 MILES
EAST OF CEDAR RAPIDS NEAR TIPTON.  THIS STORM WILL PRODUCE HAIL...STRONG
WINDS AND HEAVY DOWNPOURS.

ANOTHER INTENSE THUNDERSTORM WAS LOCATED OVER SOUTH CENTRAL IOWA...
MIDWAY BETWEEN CRESTON AND LAMONI. THIS STORM WAS MOVING EAST NORTHEAST
AT 35 MILES AN HOUR AND SHOULD BE JUST EAST OF OSCEOLA BY 630 PM.  LARGE
HAIL AND STRONG WINDS ARE POSSIBLE FROM THIS THUNDERSTORM.

SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED SOUTHEAST OF A LINE
FROM CRESTON TO DUBUQUE.  A NARROW BAND OF SHOWERS AND THUNDERSHOWERS
WAS INDICATEDB FROM 30 MILES SOUTHWEST THROUGH 40 MILES NORTHEAST OF
DES MOINES.  ALL OF THIS PRECIPITATION WAS MOVING NORTHEAST AT
35 MILES AN HOUR.

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 8, 3:50 PM CDTSevere Thunderstorm WarningDMXTama40 min
Aug 8, 4:00 PM CDTSevere Thunderstorm WarningDMXBenton45 min
Aug 8, 4:00 PM CDTSevere Thunderstorm WarningDMXTama15 min
Aug 8, 4:02 PM CDTSevere Thunderstorm WarningDMXPoweshiek28 min
Aug 8, 4:39 PM CDTSevere Thunderstorm WarningDMXLinn51 min
Aug 8, 5:30 PM CDTSevere Thunderstorm WarningDMXClarke, Union45 min
Aug 8, 5:58 PM CDTSevere Thunderstorm WarningDMXLucas32 min

Nearby

Tornado Warnings in Iowa, 1988Every tornado warning in 1988Tornadoes in 1988

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.