Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 30, NWS Twin Cities, MN

April 12, 1998Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 12, 1998, 7:48 PM CDT for Renville County, Minnesota. It was in force for 47 min. 1 report 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
Apr 12, 1998, 7:48 PM CDT (00:48 UTC)
Expired
Apr 12, 1998, 8:35 PM CDT
In force
47 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Renville County, MN

The radar

The Minneapolis radar (KMPX), 110 km from the middle of the area, began a volume at 00:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Apr 12, 8:00 PM CDTHail 1Olivia, MNSwath of 3/4 to 11/4 inch hail swept from southwest to northeast across the county.

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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.8 hours before the alert went out and 107 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, Minneapolis, MN at 00:00Z on 1998-04-13Temperature 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, Minneapolis, MN at 00:00Z on 1998-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 491 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
1693 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
491 m²/s²
0-3 km storm-relative helicity
712 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.

307 
WUUS1 KMSP 130048 RRA
SVRMSP
MNC129-130135-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
748 PM CDT SUN APR 12 1998


* SEVERE THUNDERSTORM WARNING FOR
  RENVILLE COUNTY - CENTRAL MINNESOTA

* UNTIL 835 PM CDT

* SOME LOCATIONS AFFECTED
    RENVILLE
    CHURCHILL
    HECTOR
    OLIVIA

* AT 746 PM DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE HAIL
  SOUTH OF BIRD ISLAND...ABOUT 20 MILES NORTHEAST OF REDWOOD FALLS.
  THE STORM WAS MOVING NORTHEAST AT 55 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.

DWE/JVM

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 7:02 PM CDTSevere Thunderstorm WarningMPXMartin48 min
Apr 12, 7:26 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine49 min
Apr 12, 8:30 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope45 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.