Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 31, NWS Twin Cities, MN

April 12, 1998Douglas County, Pope County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 12, 1998, 8:30 PM CDT for Douglas County, Pope County, Minnesota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 12, 1998, 8:30 PM CDT (01:30 UTC)
Expired
Apr 12, 1998, 9:15 PM CDT
In force
45 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Douglas County, MN, Pope County, MN

The radar

The Minneapolis radar (KMPX), 179 km from the middle of the area, began a volume at 01:36 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.5 hours before the alert went out and 176 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.

000 
TTAA00 KMSP 130130 RRA
SVRMSP
MNC041-121-130215-

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


* SEVERE THUNDERSTORM WARNING FOR
  DOUGLAS COUNTY - WEST CENTRAL MINNESOTA
  POPE COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 915 PM CDT

* SOME LOCATIONS AFFECTED
    ALEXANDRIA
    STARBUCK
    GLENWOOD
    HOLMES CITY

* AT 825 SEVERE WEATHER SPOTTERS REPORTED A SEVERE STORM WITH
  71 MPH WINDS ABOUT 10 MILES NORTHEAST OF MORRIS...ABOUT
  30 MILES SOUTHWEST OF  ALEXANDRIA..  THE STORM WAS MOVING EAST
  NORTHEAST AT 40 MPH.

THIS IS A DANGEROUS STORM...WITH DAMAGING WINDS.  STAY INDOORS
AWAY FROM WINDOWS.

DWE


&

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, 7:48 PM CDTSevere Thunderstorm WarningMPXRenville47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.