Alert archive / Minnesota / Tornado Warnings in 1996

Tornado Warning 28, NWS Twin Cities, MN

September 21, 1996Washington County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Sep 21, 1996, 6:30 PM CDT for Washington County, Minnesota. It was in force for 30 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 21, 1996, 6:30 PM CDT (23:30 UTC)
Expired
Sep 21, 1996, 7:00 PM CDT
In force
30 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Washington County, MN

The radar

The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 60 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 1996-09-21Temperature 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 1996-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.1939Sfc1 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
549 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
27 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 212331
TORMSP
MNC163-220000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
630 PM CDT SAT SEP 21 1996

* TORNADO WARNING FOR
  NORTHERN WASHINGTON COUNTY - EAST CENTRAL MINNESOTA

* UNTIL 700 PM CDT
 
* SOME LOCATIONS AFFECTED
    FOREST LAKE
    SCANDIA
    OTISVILLE
    MARINE ON ST CROIX

* AT 628 PM CDT LAW ENFORCEMENT REPORTED A POSSIBLE TORNADO JUST
  SOUTHEAST OF FOREST LAKE OR ABOUT 25 MILES NORTHEAST OF ST PAUL
  MOVING EAST AT 20 MPH.

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

HAMEN
 

&

Nearby

Tornado Warnings in Minnesota, 1996Every tornado warning in 1996Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.