Alert archive / Iowa / Severe Thunderstorm Warnings in 1988

Severe Thunderstorm Warning 49, NWS Des Moines, IA

August 8, 1988Lucas County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 8, 1988, 5:58 PM CDT for Lucas County, Iowa. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1988, 5:58 PM CDT (22:58 UTC)
Expired
Aug 8, 1988, 6:30 PM CDT
In force
32 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Lucas 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, 11.0 hours before the alert went out and 257 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 082258
SVRDSM
IAC117-082330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE DES MOINES IA
558 PM CDT MON AUG 8 1988

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE SOUTH CENTRAL PART OF IOWA
      NORTHERN LUCAS

RADAR INDICATED A SEVERE THUNDERSTORM IN EXTREME EAST CENTRAL
LUCAS COUNTY...THIS IS ABOUT 40 MILES SOUTH OF DES MOINES.

TOWNS AFFECTED INCLUDE...LUCAS...CHARITON...AND WILLIAMSON.

THIS STORM WAS MOVING EAST NORTHEAST AROUND 35 MILES AN HOUR.

REMEMBER...SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MILES
AN HOUR...LARGE HAIL...DaANGEROUS LIGHTNING...AND VERY HEAVY RAINS.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOU HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

ADAMS/FERRY

What forecasters said that day

The local office's own words before this severe thunderstorm 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, 8 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, 6:17 PM CDTTornado WarningDMXLucas, Marion, Warren28 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1988Every severe thunderstorm warning 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.