Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 39, NWS Sioux Falls, SD

June 5, 1990Cherokee County, O'Brien County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 5, 1990, 4:42 AM CDT for Cherokee County, O'Brien County, Iowa. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jun 5, 1990, 4:42 AM CDT (09:42 UTC)
Expired
Jun 5, 1990, 5:45 AM CDT
In force
63 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Cherokee County, IA, O'Brien 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 00:00Z, 9.7 hours before the alert went out and 187 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 00:00Z on 1990-06-05Temperature 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 00:00Z on 1990-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 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
3602 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
492 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 KSUX 050942
SVRSUX
IAC035-141-051045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE SIOUX CITY IA
442 AM CDT TUE JUN 5 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 545 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTHWEST PART OF IOWA
      NORTHERN CHEROKEE...OBRIEN

AT 435 AM CDT RADAR SHOWED A RAPIDLY DEVELOPING SEVERE
THUNDERSTORM ON THE OBRIEN COUNTY CHEROKEE COUNTY BORDER 45 MILES
NORTHEAST OF SIOUX CITY. OTHER SEVERE THUNDERSTORMS CONTINUED IN
OBRIEN COUNTY 45 TO 60 MILES NORTHEAST OF SIOUX CITY. THE STORMS
WERE MOVING TO THE SOUTHEAST AT 35 MILES AN  HOUR.

PERSONS IN PRIMGHAR...LARRABEE AND CHEROKEE AND THE SURROUNDING
AREA SHOULD TAKE SHELTER IMMEDIATELY.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN
QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM
TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY.

ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORTS
OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

KROPP

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 5, 12:39 AM CDTSevere Thunderstorm WarningFSDMonona, Plymouth, Woodbury66 min
Jun 5, 1:19 AM CDTSevere Thunderstorm WarningFSDSioux56 min
Jun 5, 1:45 AM CDTSevere Thunderstorm WarningFSDLyon30 min
Jun 5, 2:20 AM CDTSevere Thunderstorm WarningFSDSioux25 min
Jun 5, 3:56 AM CDTSevere Thunderstorm WarningFSDOsceola49 min
Jun 5, 3:56 AM CDTSevere Thunderstorm WarningFSDLyon, Sioux34 min
Jun 5, 4:13 AM CDTSevere Thunderstorm WarningFSDO'Brien62 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990

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.