Alert archive / Michigan / Tornado Warnings in 1991

Tornado Warning 13, NWS Indianapolis, IN

July 7, 1991Berrien County, Michigan

NWS Indianapolis, IN issued this tornado warning at Jul 7, 1991, 7:19 PM EDT for Berrien County, Michigan. It was in force for 26 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 7, 1991, 7:19 PM EDT (23:19 UTC)
Expired
Jul 7, 1991, 7:45 PM EDT
In force
26 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Berrien County, MI

What was reported inside it

TimeReportWhereRemark
Jul 7, 7:35 PM EDTThunderstorm Wind 0Berrien, MI

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Detroit, MI (KFNT), launched 12:00Z, 11.3 hours before the alert went out and 262 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, Detroit, MI at 12:00Z on 1991-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1038 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, Detroit, MI at 12:00Z on 1991-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
1038 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1127 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSBN 072319
TORSBN
MIC021-072345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SOUTH BEND IN
719 PM EDT SUN JUL 7 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 745 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE SOUTHWEST PART OF MICHIGAN
      SOUTHERN BERRIEN

AT 615 PM EST/715 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM
PRODUCING A POSSIBLE TORNADO NEAR NEW BUFFALO MICHIGAN...20 MILES
WEST NORTHWEST OF SOUTH BEND.

THE SEVERE THUNDERSTORM WAS MOVING TO THE EAST AT 40 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE THREE OAKS AND NILES
MICHIGAN.

IF YOU ARE IN THE PATH OF THIS TORNADO...=YOU SHOULD GO TO A BASEMENT
SHELTER OR IN MOST BUILDINGS WITHOUT A BASEMENT THE SAFEST PLACE IS
IN A SMALL ROOM IN THE CENTER OF THE BUILDING ON THE LOWEST FLOOR.

IELDS

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 9:28 PM EDTSevere Thunderstorm WarningINDBerrien32 min
Jul 6, 10:00 PM EDTSevere Thunderstorm WarningINDBerrien15 min
Jul 7, 6:53 PM EDTSevere Thunderstorm WarningINDBerrien52 min
Jul 7, 7:23 PM EDTSevere Thunderstorm WarningINDCass52 min
Jul 7, 7:28 PM EDTSevere Thunderstorm WarningINDSaint Joseph47 min

Nearby

Tornado Warnings in Michigan, 1991Every tornado warning in 1991Tornadoes in 1991

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.