Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 20, NWS Twin Cities, MN

June 22, 1997Blue Earth County, Faribault County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 22, 1997, 8:44 PM CDT for Blue Earth County, Faribault County, Minnesota. It was in force for 61 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: Jun 22, 1997, 8:44 PM CDT (01:44 UTC)
Expired: Jun 22, 1997, 9:45 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Blue Earth County, MN, Faribault County, MN

The radar

The Minneapolis radar (KMPX), 116 km from the middle of the area, began a volume at 01:47 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

Time	Report	Where	Remark
Jun 22, 9:05 PM CDT	Thunderstorm Wind 50	Huntley, MN	Trees down. Estimated windspeed.

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, 1.7 hours before the alert went out and 115 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

000 
TTAA00 KMSP 230149 RRB
SVRMSP
MNC013-MNC043-230245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION FOR COUNTY CODE
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
844 PM CDT SUN JUN 22 1997

* SEVERE THUNDERSTORM WARNING FOR
  BLUE EARTH COUNTY - SOUTH CENTRAL MINNESOTA
  FARIBAULT COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 945 PM CDT

* SOME LOCATIONS AFFECTED
    BLUE EARTH
    WELLS
    MANKATO
    GOOD THUNDER

* AT 840 PM CDT DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS
  FROM LAKE CRYSTAL THROUGH BLUE EARTH OR 20 MILES WEST OF MANKATO
  TO 18 MILES EAST OF FAIRMONT.  THE STORM WAS MOVING NORTHEAST 35
  MPH.

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

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

DME/JMM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 7:15 PM CDT	Severe Thunderstorm Warning	MPX	Brown	60 min
Jun 22, 8:06 PM CDT	Severe Thunderstorm Warning	MPX	Watonwan	49 min
Jun 22, 8:17 PM CDT	Tornado Warning	MPX	Watonwan	48 min
Jun 22, 8:56 PM CDT	Severe Thunderstorm Warning	MPX	Martin	34 min
Jun 22, 9:06 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet	44 min
Jun 22, 9:06 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet	59 min
Jun 22, 11:51 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	69 min
Jun 23, 12:47 AM CDT	Severe Thunderstorm Warning	MPX	Todd	63 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.