Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 111, NWS Twin Cities, MN

July 5, 1997Freeborn County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 1997, 6:07 PM CDT for Freeborn County, Minnesota. It was in force for 53 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
Jul 5, 1997, 6:07 PM CDT (23:07 UTC)
Expired
Jul 5, 1997, 7:00 PM CDT
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 23:10 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 12:00Z, 11.1 hours before the alert went out and 132 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 12:00Z on 1997-07-05Temperature 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 12:00Z on 1997-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.193958Sfc1 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
1610 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
71 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 052309 RRA
SVRMSP
MNC047-070000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
607 PM CDT SAT JUL 5 1997

* SEVERE THUNDERSTORM WARNING FOR
  FREEBORN COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 700 PM CDT
 
* SOME LOCATIONS AFFECTED
    HARTLAND
    CLARKS GROVE
    MANCHESTER
    ALBERT LEA

* AT 605 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL NEAR NEW RICHLAND...OpR ABOUT 30 MILES NORTHWEST OF ALBERT
  LEA.  THE STORM WAS MOVING SOUTHEAST AT 25 TO 30 MPH.

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

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 3:47 PM CDTSevere Thunderstorm WarningMPXSibley43 min
Jul 5, 4:14 PM CDTSevere Thunderstorm WarningMPXNicollet31 min
Jul 5, 4:52 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Nicollet38 min
Jul 5, 5:31 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca44 min
Jul 5, 6:16 PM CDTSevere Thunderstorm WarningMPXWaseca29 min
Jul 5, 6:17 PM CDTSevere Thunderstorm WarningMPXChisago58 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.