Alert archive / Michigan / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 15, NWS Gaylord, MI

May 29, 1991Alpena County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at May 29, 1991, 8:15 AM EDT for Alpena County, Michigan. It was in force for 45 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: May 29, 1991, 8:15 AM EDT (12:15 UTC)
Expired: May 29, 1991, 9:00 AM EDT
In force: 45 min
Issued by: NWS Gaylord, MI
Area: Whole counties

County Alpena County, MI

What was reported inside it

Time	Report	Where	Remark
May 29, 8:15 AM EDT	Thunderstorm Wind 0	Alpena, 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, 0.3 hours before the alert went out and 261 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: NaN m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, May 29, 7:35 AM EDT, 40 minutes before

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Special weather statement, May 29, 8:02 AM EDT, 13 minutes before

MIZ043-044-045-046-047-063-291300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
800 AM EDT WED MAY 29 1991

...BLUSTERY THUNDERSTORMS MOVE THROUGH NORTH CENTRAL MICHIGAN...

AT 800 AM EDT...A LINE OF THUNDERSTORMS...SOME WITH VERY HEAVY
RAINS...POSSIBLY SMALL HAIL...AND GUSTY WINDS TO 50 MPH...EXTENDED
FROM 40 MILES WEST OF ALPENA SOUTHWEST TO HOUGHTON LAKE. THE WIND
GUSTED TO 35 MPH WHEN THE LINE WENT THROUGH THE HOUGHTON LAKE AREA.

THIS LINE OF THUNDERSTORMS WAS MOVING EAST AT ABOUT 40 MPH.
ANYONE IN CRAWFORD...ROSCOMMON AND OGEMAW COUNTIES SHOULD BE ALERT
TO THESE STORMS BETWEEN 800 AM AND 845 AM.
LH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 8:13 PM EDT	Tornado Warning	APX	Mason, Oceana	22 min
May 29, 6:46 AM EDT	Severe Thunderstorm Warning	APX	Charlevoix	44 min
May 29, 7:52 AM EDT	Severe Thunderstorm Warning	APX	Montmorency	53 min
May 29, 9:07 AM EDT	Tornado Warning	APX	Iosco	23 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1991 Every severe thunderstorm warning 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.