Alert archive / Michigan / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 26, NWS Grand Rapids, MI

July 9, 1987Ionia County, Kent County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 9, 1987, 7:45 PM EDT for Ionia County, Kent County, Michigan. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Jul 9, 1987, 7:45 PM EDT (23:45 UTC)
Expired: Jul 9, 1987, 8:15 PM EDT
In force: 30 min
Issued by: NWS Grand Rapids, MI
Area: Whole counties

Counties Ionia County, MI, Kent County, MI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Detroit, MI (KFNT), launched 12:00Z, 11.8 hours before the alert went out and 156 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: 1043 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 612 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 22 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, Jul 9, 2:34 PM EDT, 5 hours 11 minutes before

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Special weather statement, Jul 9, 2:52 PM EDT, 4 hours 53 minutes before

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Special weather statement, Jul 9, 4:15 PM EDT, 3 hours 30 minutes before

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Local storm report, Jul 9, 6:05 PM EDT, 1 hour 40 minutes before

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Special weather statement, Jul 9, 6:24 PM EDT, 1 hour 21 minutes before

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Special weather statement, Jul 9, 7:36 PM EDT, 9 minutes 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
Jul 9, 12:32 PM EDT	Severe Thunderstorm Warning	GRR	Ionia, Kent	28 min
Jul 9, 12:43 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	62 min
Jul 9, 12:51 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	69 min
Jul 9, 1:18 PM EDT	Tornado Warning	GRR	Ionia	27 min
Jul 9, 1:43 PM EDT	Flash Flood Warning	GRR	Gratiot	2 hr
Jul 9, 2:10 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	18 min
Jul 9, 3:01 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	59 min
Jul 9, 3:02 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo	33 min
Jul 9, 3:18 PM EDT	Severe Thunderstorm Warning	GRR	Clinton	57 min
Jul 9, 3:30 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham	60 min
Jul 9, 4:27 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	33 min
Jul 9, 7:21 PM EDT	Severe Thunderstorm Warning	GRR	Ionia, Kent	24 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1987 Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.