Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 18, NWS Twin Cities, MN

June 22, 1997Brown County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 22, 1997, 7:15 PM CDT for Brown County, Minnesota. It was in force for 60 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 22, 1997, 7:15 PM CDT (00:15 UTC)
Expired
Jun 22, 1997, 8:15 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Brown County, MN

The radar

The Minneapolis radar (KMPX), 114 km from the middle of the area, began a volume at 00:16 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 22, 5:00 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 112 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 1997-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1565 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 1997-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
1565 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1227 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
388 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

352 
WUUS1 KMSP 230016 RRA
SVRMSP
MNC015-230115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
715 PM CDT SUN JUN 22 1997

* SEVERE THUNDERSTORM WARNING FOR
  BROWN COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 815 PM CDT
 
* SOME LOCATIONS AFFECTED
    COMFREY
    DOTSON
    LEAVENWORTH
    COBDEN
    SLEEPY EYE

* AT 715 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM 10 MILES
  SOUTH OF COMFREY...OR 35 MILES SOUTHWEST OF NEW ULM.  THE STORM
  WAS MOVING NORTHEAST AT 30 MPH.

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

A TORNADO WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

DME

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 8:06 PM CDTSevere Thunderstorm WarningMPXWatonwan49 min
Jun 22, 8:17 PM CDTTornado WarningMPXWatonwan48 min
Jun 22, 8:44 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault61 min
Jun 22, 8:56 PM CDTSevere Thunderstorm WarningMPXMartin34 min
Jun 22, 9:06 PM CDTSevere Thunderstorm WarningMPXNicollet44 min
Jun 22, 9:06 PM CDTSevere Thunderstorm WarningMPXNicollet59 min
Jun 22, 11:51 PM CDTSevere Thunderstorm WarningMPXDouglas69 min
Jun 23, 12:47 AM CDTSevere Thunderstorm WarningMPXTodd63 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.