Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 173, NWS Twin Cities, MN

July 27, 1997Dakota County, Goodhue County, Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 27, 1997, 3:08 PM CDT for Dakota County, Goodhue County, Rice County, Minnesota. It was in force for 52 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 27, 1997, 3:08 PM CDT (20:08 UTC)
Expired
Jul 27, 1997, 4:00 PM CDT
In force
52 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Dakota County, MN, Goodhue County, MN, Rice County, MN

The radar

The Minneapolis radar (KMPX), 59 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 61 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 1997-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3509 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 12:00Z on 1997-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
3509 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
-0.3
Supercell composite
-1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 272008 RRA
SVRMSP
MNC037-049-131-272100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
308 PM CDT SUN JUL 27 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN DAKOTA COUNTY - EAST CENTRAL MINNESOTA
  WESTERN GOODHUE COUNTY - SOUTHEASTERN MINNESOTA
  EASTERN RICE COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 400 PM CDT
 
* SOME LOCATIONS AFFECTED
    NORTHFIELD
    CANNON FALLS
    KENYON

* AT 305 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS 5 MILES NORTHEAST OF NORTHFIELD OR 35 MILES SOUTH
  OF ST. PAUL.  THE STORM WAS MOVING SOUTH AT 20 MPH.

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


HOWIESON

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.