Alert archive / Michigan / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 102, NWS Grand Rapids, MI

August 16, 1997Hillsdale County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 16, 1997, 7:20 AM EDT for Hillsdale County, Michigan. It was in force for 45 min. 2 reports 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, 7:20 AM EDT (11:20 UTC)
Expired: Aug 16, 1997, 8:05 AM EDT
In force: 45 min
Issued by: NWS Grand Rapids, MI
Area: Whole counties

County Hillsdale County, MI

What was reported inside it

Time	Report	Where	Remark
Aug 16, 7:21 AM EDT	Thunderstorm Wind	Hillsdale, MI	Minor tree damage reported, with limbs strewn along portions of U.S. Highway 12.
Aug 16, 7:25 AM EDT	Thunderstorm Wind	Moscow, MI	Scattered reports of trees and power lines downed across Moscow Township.

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 00:00Z, 11.3 hours before the alert went out and 133 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: 1189 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.2

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.

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 16, 12:20 AM EDT, 7 hours earlier.

Area forecast discussion, Aug 16, 12:20 AM EDT, 7 hours before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 5:56 AM EDT	Severe Thunderstorm Warning	GRR	Berrien	44 min
Aug 16, 2:11 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Kalamazoo	49 min
Aug 16, 2:13 PM EDT	Severe Thunderstorm Warning	GRR	Cass, Saint Joseph	47 min
Aug 16, 2:40 PM EDT	Severe Thunderstorm Warning	GRR	Branch	50 min
Aug 16, 2:55 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	50 min
Aug 16, 3:01 PM EDT	Severe Thunderstorm Warning	GRR	Saint Joseph	49 min
Aug 16, 3:04 PM EDT	Severe Thunderstorm Warning	GRR	Saint Joseph	46 min
Aug 16, 3:18 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	47 min
Aug 16, 3:23 PM EDT	Severe Thunderstorm Warning	GRR	Hillsdale	52 min
Aug 16, 3:55 PM EDT	Severe Thunderstorm Warning	GRR	Berrien, Cass, Saint Joseph	45 min
Aug 16, 4:14 PM EDT	Flash Flood Warning	GRR	Cass, Saint Joseph	3 hr
Aug 16, 4:57 PM EDT	Severe Thunderstorm Warning	GRR	Cass	48 min
Aug 16, 7:06 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	34 min
Aug 16, 7:14 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo	51 min
Aug 16, 7:34 PM EDT	Severe Thunderstorm Warning	GRR	Cass, Saint Joseph	51 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.