Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 12, NWS Twin Cities, MN

June 19, 1997Stevens County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 19, 1997, 11:11 PM CDT for Stevens County, Swift County, Minnesota. It was in force for 49 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
Jun 19, 1997, 11:11 PM CDT (04:11 UTC)
Expired
Jun 20, 1997, 12:00 AM CDT
In force
49 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Stevens County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 04:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 19, 10:00 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.2 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, Minneapolis, MN at 00:00Z on 1997-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 528 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 1997-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 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
528 J/kg
Mixed-layer CIN
-166 J/kg
Mixed-layer LCL
702 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
313 m²/s²
Significant tornado parameter
0.2
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 200413 RRA
SVRMSP
MNC149-151-200500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1111 PM CDT THU JUN 19 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN STEVENS COUNTY - WEST CENTRAL MINNESOTA
  WESTERN SWIFT COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 1200 AM CDT
 
* SOME LOCATIONS AFFECTED
    APPLETON
    HANCOCK
    OPEN AREAS SOUTH OF CHOKIO
    HOLLOWAY

* AT 1109 PM CDT DOPPLE6R RADAR INDICATED SEVERE STORMS WITH LARGE
  HAIL AND DAMAGING WINDS OR 20 MILES WEST AND SOUTHWEST OF MORRIS.
   THE STORMS WERE MOVING SOUTHEAST AT 25 MPH.

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


JVM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 11:45 PM CDTSevere Thunderstorm WarningMPXPope45 min
Jun 20, 3:55 PM CDTSevere Thunderstorm WarningMPXHennepin35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997Every severe thunderstorm warning in 1997

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.