Alert archive / Michigan / Tornado Warnings in 1991

Tornado Warning 5, NWS Gaylord, MI

July 6, 1991Alpena County, Michigan

NWS Gaylord, MI issued this tornado warning at Jul 6, 1991, 5:51 PM EDT for Alpena County, Michigan. It was in force for 54 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 6, 1991, 5:51 PM EDT (21:51 UTC)
Expired
Jul 6, 1991, 6:45 PM EDT
In force
54 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Alpena County, MI

What was reported inside it

TimeReportWhereRemark
Jul 6, 6:45 PM EDTHail 1.75Alpena, 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

Sault Ste Marie, MI (KY62), launched 12:00Z, 9.9 hours before the alert went out and 169 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, Sault Ste Marie, MI at 12:00Z on 1991-07-06Temperature 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, Sault Ste Marie, MI at 12:00Z on 1991-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1226 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAPN 062154
TORAPN
MIC007-062245-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE ALPENA MI
551 PM EDT SAT JUL 6 1991
 
THE NATIONAL WEATHER SERVICE IN ALPENA HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  645 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST LOWER MICHIGAN
 
   ...EASTERN ALPENA COUNTY
 
  AND FOR MARINE INTERESTS ON COASTAL WATERS FROM...
 
   ...ROCKPORT  TO  SOUTH POINT
 
AT 550 PM...A FUNNEL CLOUD WAS LOCATED ONE MILE SOUTH OF THE ALPENA
COUNTY REGIONAL AIRPORT. THE STORM WAS MOVING EAST AT 25 MILES AN HOUR.
 
IF YOU ARE IN THE CITY OF ALPENA...TAKE COVER IMMEDIATELY.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
RS

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 6, 12:47 PM EDT, 5 hours 4 minutes before
MIZ039-048-060>062-064>068-061800-

SPECIAL WEATHER STATEMENT AND SHORT RANGE FORECAST
NATIONAL WEATHER SERVICE ALPENA MI
1245 PM EDT SAT JUL 6 1991

...THUNDERSTORMS WILL REDEVELOP THIS AFTERNOON AND MAY BECOME SEVERE...

AT 1230 PM...MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY FROM THIS
MORNING HAD COME TO AN END AND SKIES WERE BECOMING PARTLY TO MOSTLY
SUNNY. TEMPERATURES WERE RISING THROUGH THE 70S AND WINDS WERE
BEGINNING TO INCREASE OUT OF THE SOUTH.

SKIES WILL REMAIN PARTLY TO MOSTLY SUNNY THROUGHOUT THE EARLY AFTERNOON
WITH JUST A FEW SHOWERS AND THUNDERSTORMS. HOWEVER...BY MID TO LATE
AFTERNOON THUNDERSTORMS WILL BECOME MORE NUMEROUS AND SOME COULD BECOME
SEVERE...PRODUCING STRONG GUSTY WINDS...LARGE HAIL...AND HEAVY RAINFALL.
TEMPERATURES WILL BE RISING TO THE MID 80S THIS AFTERNOON AND WINDS WILL
CONTINUE TO INCREASE OUT OF THE SOUTH AND SOUTHWEST.

PEOPLE IN NORTHEAST AND EXTREME NORTHERN MICHIGAN AND BOATERS ON THE
LAKES SHOULD BE ON THE LOOK OUT FOR THREATENING WEATHER LATER THIS
AFTERNOON. YOU MAY NEED TO SEEK SHELTER AS SOME OF THE STORMS COULD
BE QUITE DANGEROUS.

BDM

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 4:53 PM EDTSevere Thunderstorm WarningAPXAlpena, Presque Isle52 min
Jul 6, 5:55 PM EDTSevere Thunderstorm WarningAPXPresque Isle50 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.