Alert archive / Michigan / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 49, NWS Detroit, MI

August 16, 1997Monroe County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 16, 1997, 8:06 AM EDT for Monroe County, Michigan. It was in force for 49 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: Aug 16, 1997, 8:06 AM EDT (12:06 UTC)
Expired: Aug 16, 1997, 8:55 AM EDT
In force: 49 min
Issued by: NWS Detroit, MI
Area: Whole counties

County Monroe County, MI

The radar

The Detroit radar (KDTX), 87 km from the middle of the area, began a volume at 12:05 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
Aug 16, 8:15 AM EDT	Thunderstorm Wind 75	Temperance, 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 0.1 hours before the alert went out and 89 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: 2226 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDTX 161207 RRA
SVRDTX
MIC115-161255-

BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
806 AM EDT SAT AUG 16 1997

*   SEVERE THUNDERSTORM WARNING FOR
    MONROE COUNTY - SOUTHEASTERN LOWER MICHIGAN

*   UNTIL 855 AM EDT
 
*   SOME AREAS AFFECTED
    PETERSBURG                    BY 806 AM EDT
    DUNDEE                        BY 809 AM EDT
    MAYBEE                        BY 816 AM EDT
    MONROE                        BY 823 AM EDT

*  AT 804 AM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY
  DETROIT/PONTIAC DOPPLER RADAR 19 MILES WEST OF MONROE OR 5 MILES
WEST OF DUNDEE MOVING EAST AT 55 MPH.
 
WHEN THUNDERSTORMS ARE OCCURRIN4G...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

DLK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 7:21 AM EDT	Severe Thunderstorm Warning	DTX	Lenawee	64 min
Aug 16, 7:49 AM EDT	Tornado Warning	DTX	Washtenaw	61 min
Aug 16, 8:15 AM EDT	Tornado Warning	DTX	Wayne	65 min
Aug 16, 2:50 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	40 min
Aug 16, 3:34 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	56 min
Aug 16, 4:20 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	55 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1997 Every severe thunderstorm warning in 1997

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.