Alert archive / Nebraska / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 4, NWS Sioux Falls, SD

April 24, 1989Dakota County, Dixon County, Nebraska; Union County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 24, 1989, 11:49 PM CDT for Dakota County, Dixon County, Nebraska; Union County, South Dakota. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Apr 24, 1989, 11:49 PM CDT (04:49 UTC)
Expired
Apr 25, 1989, 12:45 AM CDT
In force
56 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Dakota County, NE, Dixon County, NE, Union County, SD

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, 4.8 hours before the alert went out and 142 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 1989-04-25Temperature 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 1989-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
3573 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
69 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 250451
SVRSUX
NEC043-051-SDC127-250545-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
1149 PM CDT MON APR 24 1989
 
THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST NEBRASKA
          ...DAKOTA...DIXON
IN SOUTHEAST SOUTH DAKOTA
          ...UNION
 
AT 1145 PM RADAR INDICATED SEVERE THUNDERSTORMS MOVING INTO UNION
COUNTY IN SOUTH DAKOTA, DIXION AND DAKOTA COUNTIES IN NEBRASKA.
REPORTS OF STRONG WINDS NEAR 60 MILES AN HOUR HAVE BEEN REPORTED WITH
THESE STORMS. THESES STORMS ARE MOVING NORTHEAST AT 50 MILES AN
HOUR.
 
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.
TANNER

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, Apr 24, 10:34 PM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1033 PM CDT MON APR 24 1989

...VERY STRONG THUNDERSTORMS MOVING INTO THE SIOUXLAND AREA...

AT 1020 PM...RADAR SHOWED A LINE OF STRONG THUNDERSTORMS LOCATED
FROM 25 MILES EAST OF ONEIL NEBRASKA TO 20 MILES NORTHWEST OF
COLUMBUS NEBRASKA. THIS LINE OF STORMS WAS MOVING EAST AT 35 MILES
AN HOUR.

THESE THUNDERSTORMS HAVE THE POTENTIAL FOR HEAVY RAIN SHOWERS...
SMALL HAIL AND STRONG WIND GUSTS.  RESIDENTS OF DIXON, DAKOTA AND
THURSTON COUNTIES IN NEBRASKA SHOULD WATCH WEATHER CONDITIONS CLOSELY
AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER DEVELOPES.
THIS LINE OF STORMS SHOULD ENTER THE ABOVE COUNTIES BY 1130 PM.
SHOULD SEVERE WEATHER BE OBSERVED...PLEASE REPORT IT TO LOCAL LAW
ENFORCEMENT OR CIVIL DEFENSE AGENCIES FOR RELAY TO THE NATIONAL
WEATHER SERVICE.
TANNER
Special weather statement, Apr 24, 11:46 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1145 PM CST MON APR 25 1989

...INTENSE THUNDERSTORMS NEAR YANKTON...

AT 1135 PM CDT RADAR SHOWED INTENSE THUNDERSTORMS NEAR YANKTON SOUTH
DAKOTA MOVING EAST ABOUT 40 MPH. 50 TO 60 MPH WINDS WERE REPORTED
4 MILES NORTH OF YANKTON AT 1133 PM. VERY HEAVY RAIN AND 40 MPH WINDS
WERE REPORTED 8 MILES WEST OF YANKTON AT 1140 PM.

THESE THUNDERSTORMS WILL LIKELY PRODUCE DANGEROUS CLOUD TO GROUND
LIGHTNING AND BRIEF PERIODS OF VERY HEAVY RAIN. HAIL AND STRONG WINDS
ARE ALSO POSSIBLE WITH THESE THUNDERSTORMS.

THE THUNDERSTORMS WILL MOVE INTO SOUTHERN CLAY COUNTY BY 1230 AM
TUESDAY MORNING. RESIDENTS IN THE PATH OF THESE THUNDERSTORMS SHOULD
BE PREPARED FOR THIS ADVERSE WEATHER AND MOVE TO A SAFE PLACE IF
NECESSARY.
BLOOM

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 11:12 PM CDTSevere Thunderstorm WarningFSDThurston63 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1989Severe Thunderstorm Warnings in South Dakota, 1989Every severe thunderstorm warning in 1989

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.