Alert archive / Minnesota / Tornado Warnings in 1996

Tornado Warning 20, NWS Twin Cities, MN

July 21, 1996Morrison County, Todd County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 21, 1996, 9:21 PM CDT for Morrison County, Todd County, Minnesota. It was in force for 29 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: Jul 21, 1996, 9:21 PM CDT (02:21 UTC)
Expired: Jul 21, 1996, 9:50 PM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Morrison County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 155 km from the middle of the area, began a volume at 02:21 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
Jul 21, 9:52 PM CDT	Hail 1.75	Flensburg, MN

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, 2.4 hours before the alert went out and 153 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: 368 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1193 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 220223
TORMSP
MNC097-153-220250-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
921 PM CDT SUN JUL 21 1996

* TORNADO WARNING FOR
  SOUTHWESTERN MORRISON COUNTY - CENTRAL MINNESOTA
  EXTREME SOUTHEASTERN TODD COUNTY - CENTRAL MINNESOTA

* UNTIL 950 PM CDT
 
* SOME LOCATIONS AFFECTED
    SWANVILLE
    BURTRUM
    GREY EAGLE
    UPSALA
    ELMDALE

* AT 920 PM CDT LAW ENFORCEMENT REPORTED A FUNNEL COLOUD
  JUST WEST OF SWANVILLE...OR ABOUT 35 MILES NORTHWEST OF
  ST CLOUD.  IT WAS MOVING EAST-SOUTHEAST AT 20 MPH.  RADAR ALSO
  INDICATED A DEVELOPING TORNADO.

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

TDK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:03 PM CDT	Severe Thunderstorm Warning	MPX	Todd	42 min
Jul 21, 7:38 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	52 min
Jul 21, 8:37 PM CDT	Severe Thunderstorm Warning	MPX	Pope	43 min
Jul 21, 8:44 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	46 min
Jul 21, 8:48 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	52 min
Jul 21, 8:57 PM CDT	Tornado Warning	MPX	Kandiyohi, Stearns	33 min
Jul 21, 9:35 PM CDT	Tornado Warning	MPX	Kandiyohi, Meeker	25 min
Jul 21, 9:53 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	37 min
Jul 21, 10:32 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Sherburne	43 min
Jul 21, 10:57 PM CDT	Tornado Warning	MPX	Isanti, Mille Lacs	23 min
Jul 21, 11:19 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	61 min

Nearby

Tornado Warnings in Minnesota, 1996 Every tornado warning in 1996 Tornadoes in 1996

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.