Alert archive / Minnesota / Tornado Warnings in 1997

Tornado Warning 49, NWS Twin Cities, MN

September 18, 1997Benton County, Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Sep 18, 1997, 7:56 PM CDT for Benton County, Mille Lacs 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
Sep 18, 1997, 7:56 PM CDT (00:56 UTC)
Expired
Sep 18, 1997, 8:45 PM CDT
In force
49 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Benton County, MN, Mille Lacs County, MN

The watch it was issued in

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

IssuedProductOfficeLasted
Sep 18, 5:30 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.9 hours before the alert went out and 109 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 1997-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1943 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 1997-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 298 square meters per square second.1939587897117Sfc1 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
1943 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
298 m²/s²
0-3 km storm-relative helicity
399 m²/s²
Significant tornado parameter
2.1
Supercell composite
8.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 190057 RRA
TORMSP
MNC009-095-190145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
756 PM CDT THU SEP 18 1997


* TORNADO WARNING FOR
  NORTHEASTERN BENTON COUNTY - CENTRAL MINNESOTA
  CENTRAL AND SOUTHERN MILLE LACS COUNTY - CENTRAL MINNESOTA

* UNTIL 845 PM CDT

* SOME LOCATIONS AFFECTED
    PAGE
    MILACA
    FORESTON
    GILMAN

* AT 750 PM CDT SEVERE WEATHER SPOTTERS REPORTED A TORNADO JUST
  SOUTH OF BUCKMAN...OR ABOUT 20 MILES NORTH OF ST CLOUD.
  DOPPLER RADAR CONTINUED TO SHOW STRONG TORNADIC POTENTIAL WITH
  THIS STORM. THE TORNADO PRODUCING STORM WAS MOVING EAST AT 30.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

MILLER


&

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 7:08 PM CDTTornado WarningMPXMorrison37 min
Sep 18, 7:25 PM CDTTornado WarningMPXKanabec35 min
Sep 18, 7:43 PM CDTTornado WarningMPXMorrison47 min

Nearby

Tornado Warnings in Minnesota, 1997Every tornado warning in 1997Tornadoes 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.