Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 1, NWS Twin Cities, MN

March 27, 1998Freeborn County, Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 27, 1998, 2:29 AM CST for Freeborn County, Steele County, Minnesota. It was in force for 31 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
Mar 27, 1998, 2:29 AM CST (08:29 UTC)
Expired
Mar 27, 1998, 3:00 AM CST
In force
31 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Freeborn County, MN, Steele County, MN

The radar

The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 08:29 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
Mar 27, 2:35 AM CSTHail 0.75Blooming Prairie, MN

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, 8.5 hours before the alert went out and 114 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 1998-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 90 joules per kilogram.LCLLFCEL10008507005003002001001 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 1998-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939587897117136Sfc1 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
90 J/kg
Mixed-layer CIN
-358 J/kg
Mixed-layer LCL
789 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

197 
WUUS1 KMSP 270832 RRA
SVRMSP
MNC047-147-270900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
229 AM CST FRI MAR 27 1998


* SEVERE THUNDERSTORM WARNING FOR
  NORTHERN FREEBORN COUNTY - SOUTH CENTRAL MINNESOTA
  SOUTHEASTERN STEELE COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 300 AM CST

* SOME LOCATIONS AFFECTED
    GENEVA
    BLOOMING PRAIRIE

* AT 225 AM CST DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL 10 MILES NORTH OF ALBERT LEA.  THE STORM WAS MOVING NORTHEAST
  AT 40 MILES AN HOUR..

THIS IS A DANGEROUS STORM.  STAY INDOORS AWAY FROM WINDOWS.


LRS

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.