Alert archive / Iowa / Tornado Warnings in 1988

Tornado Warning 10, NWS Des Moines, IA

July 9, 1988Guthrie County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 9, 1988, 1:28 PM CDT for Guthrie County, Iowa. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1988, 1:28 PM CDT (18:28 UTC)
Expired
Jul 9, 1988, 2:00 PM CDT
In force
32 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Guthrie 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, 6.5 hours before the alert went out and 161 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 1988-07-09Temperature 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 1988-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.1939Sfc1 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
3618 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
-58 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 091830
TORDSM
IAC077-091900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
128 PM CDT SAT JUL 9 1988

THE NATIONAL WEATHER SERVICE HAS I

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, Jul 9, 9:06 AM CDT, 4 hours 22 minutes before
SPECIAL IOWA DROUGHT STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
905 AM CDT SAT JUL 9 1988

HOT AND HUMID WEATHER CONTINUED ACROSS IOWA DURING THE PAST 24 HOURS.
HIGH TEMPERATURES FRIDAY RANGED FROM THE MIDDLE TO UPPER 80S IN THE
EXTREME NORTH AND WEST TO THE MIDDLE 90S ELSEWHERE.  NO RECORD HIGHS
WERE REPORTED.  OVERNIGHT LOWS WERE IN THE MIDDLE 60S TO LOWER 70S.

SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER NORTH AND WESTERN COUNTIES
YESTERDAY...LAST NIGHT AND THIS MORNING.  SUBSTANTIAL RAINS FELL IN
AN AREA BETWEEN OMAHA/COUNCIL BLUFFS...CHEROKEE AND SPIRIT LAKE.

SEVERAL ISOLATED AREAS PICKED UP HEAVIER RAINS.  CHEROKEE IN NORTHWEST
IOWA...RECEIVED A LITTLE UNDER ONE INCH AND FOUR TENTHS /1.39/...SPENCER
IN NORTHWEST IOWA...PICKED UP A AROUND AN INCH /.97/...AND HAMBURG IN
EXTREME SOUTHWEST IOWA REPORTED EIGHT TENTHS /.80/.  OVERALL...RAINFALL
AMOUNTS RANGED FROM LESS THAN TENTH OF AN INCH IN PARTS OF NORTH CENTRAL
AND CENTRAL IOWA...TO OVER THREE QUARTERS OF AN INCH OVER THE NORTHWEST
THIRD OF THE STATE.
WARM AND HUMID WEATHER WILL CONTINUE TODAY THROUGH SUNDAY...WITH
HIGHS IN THE MIDDLE 80S AND LOWER 90S.   SHOWERS AND THUNDERSTORMS
WILL LINGER OVER THE WESTERN AND NORTHERN COUNTIES TODAY...AND BEGIN
TO SPREAD OR DEVELOP FURTHER INTO CENTRAL AND EASTERN IOWA LATER
THIS AFTERNOON...TONIGHT AND SUNDAY.  SUBSTANIAL RAINS WILL BE SPOTTY.

THE FORECAST FOR MONDAY THROUGH WEDNESDAY FOR IOWA INDICATES A
A CHANCE OF THUNDERSTORMS ON MONDAY WITH PARTLY CLOUDY CONDITIONS
TUESDAY AND WEDNESDAY WITH NEAR SEASONAL TEMPERATURES.

THE REMAINDER OF NEXT WEEK CALLS FOR TEMPERATURES TO AVERAGE
ABOVE NORMAL...WITH BELOW NORMAL RAINFALL.

MCQUIRTER
Special weather statement, Jul 9, 11:50 AM CDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1148 AM CDT SAT JUL 9 1988

AT 1135 AM...A SMALL CLUSTER OF INTENSE THUNDERSTORMS HAD DEVELOPED
10 TO 20 MILES SOUTH AND SOUTHEAST OF DES MOINES AROUND THE CITIES
OF INDIANOLA AND MELCHER. DUE TO THE RAPID DEVELOPMENT OF THESE STORMS
VERY HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING
IS LIKELY WITH THESE STORMS.

A 70 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS STRETCHED FROM THE
SOUTHWEST TO NORTHEAST CORNERS OF THE STATE. THE SHOWERS AND STORMS
WERE LOCATED 35 TO 40 MILES EITHER SIDE OF A LINE FROM OMAHA/COUNCIL
BLUFFS NORTHEAST TO DECORAH. THE STRONGEST STORMS IN THIS BAND WERE
(LOCATED 10 MILES NORTHEAST OF COUNCIL BLUFFS AND 45 MILES NORTHEAST
OF WATERLOO NEAR POSTVILLE.

THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 20 MILES AN HOUR.

BARLOW
Special weather statement, Jul 9, 12:46 PM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1245 PM CDT SAT JUL 9 1988

AT 1235 PM...AN 80 MILE WIDE BAND OF SHOWERS AND ISOLATED STRONG
THUNDERSTORMS STRETCHED FROM SOUTHWEST THROUGH CENTRAL INTO NORTH
CENTRAL AND NORTHEAST IOWA. THE STRONGEST STORMS WERE LOCATED IN
A 30 MILE WIDE BAND FROM JUST SOUTHWEST OF DES MOINES NORTHEAST
TO 20 MILES SOUTHEAST OF WATERLOO...NEAR VINTON. VERY HEAVY RAIN
...FREQUENT DANGEROUS LIGHTNING AND GUSTY WINDS CAN BE EXPECTED
WITH THESE STORMS.

SHOWERS AND ISOLATED THUNDERSTORMS WERE SCATTERED OVER THE NORTH
CENTRAL AND NORTHEAST COUNTIES OF THE STATE.

THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 20g MILES AN HOUR.

BARLOW

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.