Alert archive / Iowa / Tornado Warnings in 1988

Tornado Warning 8, NWS Des Moines, IA

May 8, 1988Johnson County, Iowa

NWS Des Moines, IA issued this tornado warning at May 8, 1988, 2:35 PM CDT for Johnson County, Iowa. It was in force for 40 min. 3 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
May 8, 1988, 2:35 PM CDT (19:35 UTC)
Expired
May 8, 1988, 3:15 PM CDT
In force
40 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Johnson 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
May 8, 2:42 PM CDTTornado F2Johnson, IA
May 8, 3:00 PM CDTTornado F0Johnson, IA
May 8, 3:05 PM CDTThunderstorm Wind 50Johnson, 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

Peoria Regional, IL (KPIA), launched 12:00Z, 7.6 hours before the alert went out and 200 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, Peoria Regional, IL at 12:00Z on 1988-05-08Temperature 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, Peoria Regional, IL at 12:00Z on 1988-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 194 square meters per square second.19395878Sfc1 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
1404 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
194 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 081936
TORDSM
IAC095-103-082015-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
235 PM CDT SUN MAY 8 1988
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  315 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN EAST CENTRAL IOWA
          ...EASTERN IOWA...JOHNSON
 
AT 230 PM...IOWA COUNTY SHERIFFS AND POLICE DEPARTMENTS CONTINUE TO
MONITOR THE PROGREES OF SEVERAL TORNADOES MOVING EAST NORTHEAST ACROSS
THE SOUTHERN PART OF IOWA COUNTY.
 
THE TORNADOES WERE SOUTH OF WILLIAMSBURG AND EAST OF PARNELL OR ABOUT
20 TO 25 MILES WEST OF IOWA CITY.
 
EXPECTED TRACK OF THESE STORMS WILL AFFECT FRYTOWN AND THE ENTIRE IOWA
CITY AREA BY 300 PM.  THESE TORNADOES WILL BE NEARING INTERSTATE 80 IN
THE IOWA CITY AREA.
 
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 USE 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.
 
MYERS

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, May 8, 2:17 PM CDT, 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
215 PM CDT SUN MAY 8 1988

A TORNADO WATCH CONTINUES FOR A LARGE PART OF CENTRAL AND
EASTERN IOWA UNTIL 400 PM...

A LINE OF SEVERE THUNDERSTORMS WILL MOVING INTO THE CEDAR RAPIDS
AND IOWA CITY AREA BETWEEN 215 PM AND 300 PM THIS AFTERNOON.

LARGE HAIL...DAMAGING WINDS AND HEAVY RAIN ARE LIKELY WITH SOME

PEOPLE SHOULD BE ON THE LOOKOUT...AND LISTEN FOR POSSIBLE WARNING
OR STATEMENTS.

LARGE HAIL...DAMAGING WINDS AND HEAVY RAIN ARE LIKELY WITH THESE STORMS.

THE STORMS WERE MOVING NORTHEAST AT 45 MILES AN HOUR...WHILE THE LINE
WAS MOVING EAST AT 15 MILES AN HOUR.
MCQIRTER

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 7:45 PM CDTSevere Thunderstorm WarningDMXCrawford, Sac30 min
May 7, 8:20 PM CDTSevere Thunderstorm WarningDMXCalhoun, Sac25 min
May 7, 8:35 PM CDTSevere Thunderstorm WarningDMXCrawford40 min
May 7, 8:50 PM CDTSevere Thunderstorm WarningDMXCalhoun, Pocahontas40 min
May 7, 9:05 PM CDTSevere Thunderstorm WarningDMXHumboldt35 min
May 7, 9:30 PM CDTSevere Thunderstorm WarningDMXEmmet20 min
May 7, 9:31 PM CDTSevere Thunderstorm WarningDMXCrawford, Sac44 min
May 8, 12:02 AM CDTSevere Thunderstorm WarningDMXCrawford43 min
May 8, 4:38 AM CDTSevere Thunderstorm WarningDMXHumboldt37 min
May 8, 9:42 AM CDTSevere Thunderstorm WarningDMXRinggold, Taylor33 min
May 8, 10:26 AM CDTSevere Thunderstorm WarningDMXRinggold, Taylor34 min
May 8, 11:08 AM CDTSevere Thunderstorm WarningDMXMadison52 min
May 8, 11:20 AM CDTSevere Thunderstorm WarningDMXClarke, Warren70 min
May 8, 11:41 AM CDTSevere Thunderstorm WarningDMXPolk49 min
May 8, 11:44 AM CDTSevere Thunderstorm WarningDMXFranklin61 min
May 8, 12:01 PM CDTTornado WarningDMXJasper29 min
May 8, 12:15 PM CDTTornado WarningDMXJasper45 min
May 8, 12:25 PM CDTSevere Thunderstorm WarningDMXCerro Gordo65 min
May 8, 12:34 PM CDTSevere Thunderstorm WarningDMXMarshall41 min
May 8, 12:43 PM CDTSevere Thunderstorm WarningDMXClarke32 min
May 8, 12:55 PM CDTSevere Thunderstorm WarningDMXTama50 min
May 8, 12:58 PM CDTSevere Thunderstorm WarningDMXLucas, Marion, Warren47 min
May 8, 1:24 PM CDTSevere Thunderstorm WarningDMXBlack Hawk36 min
May 8, 1:25 PM CDTSevere Thunderstorm WarningDMXMarion35 min
May 8, 1:33 PM CDTTornado WarningDMXPoweshiek27 min
May 8, 1:40 PM CDTSevere Thunderstorm WarningDMXBremer50 min
May 8, 2:01 PM CDTTornado WarningDMXIowa, Poweshiek29 min
May 8, 2:11 PM CDTTornado WarningDMXKeokuk, Mahaska49 min
May 8, 2:23 PM CDTSevere Thunderstorm WarningDMXBuchanan, Fayette42 min
May 8, 2:35 PM CDTTornado WarningDMXIowa30 min
May 8, 3:00 PM CDTTornado WarningDMXWashington30 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.