Alert archive / Michigan / Special Weather Statements in 2017

Special Weather Statement, NWS Grand Rapids, MI

July 12, 2017Calhoun County, Kalamazoo County, Michigan

NWS Grand Rapids, MI issued this special weather statement at Jul 12, 2017, 12:13 PM EDT for Calhoun County, Kalamazoo County, Michigan. It was in force for 92 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 12, 2017, 12:13 PM EDT (16:13 UTC)
Expired: Jul 12, 2017, 1:45 PM EDT
In force: 92 min
Issued by: NWS Grand Rapids, MI

Counties Calhoun County, MI, Kalamazoo County, MI

The radar

The Grand Rapids radar (KGRR), 76 km from the middle of the area, began a volume at 16:12 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 4.2 hours before the alert went out and 176 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: 327 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 12, 10:54 AM EDT, 1 hour 19 minutes earlier.

Area forecast discussion, Jul 12, 10:54 AM EDT, 1 hour 19 minutes before

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Hazardous weather outlook, Jul 12, 10:10 AM EDT, 2 hours 3 minutes before

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In the hours before

Local storm report, Jul 12, 10:29 AM EDT, 1 hour 44 minutes before

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Special weather statement, Jul 12, 11:09 AM EDT, 1 hour 4 minutes before

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Special weather statement, Jul 12, 11:17 AM EDT, 56 minutes before

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Local storm report, Jul 12, 11:28 AM EDT, 45 minutes before

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Special weather statement, Jul 12, 11:45 AM EDT, 28 minutes before

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Special weather statement, Jul 12, 12:13 PM EDT, 0 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 12, 1:09 AM EDT	Flood Watch	GRR	Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more	29 hr
Jul 12, 1:59 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	31 min
Jul 12, 6:07 AM EDT	Special Weather Statement	GRR	Allegan, Kalamazoo, Van Buren	53 min
Jul 12, 8:42 AM EDT	Special Marine Warning	GRR		2 hr
Jul 12, 9:03 AM EDT	Special Marine Warning	GRR		87 min
Jul 12, 9:14 AM EDT	Special Weather Statement	GRR	Mason, Oceana	91 min
Jul 12, 9:22 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	83 min
Jul 12, 9:59 AM EDT	Severe Thunderstorm Warning	GRR	Allegan	18 min
Jul 12, 10:23 AM EDT	Special Marine Warning	GRR		112 min
Jul 12, 11:09 AM EDT	Special Weather Statement	GRR	Ingham	51 min
Jul 12, 11:17 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	58 min
Jul 12, 11:22 AM EDT	Areal Flood Advisory	GRR	Ingham	6 hr
Jul 12, 11:45 AM EDT	Special Weather Statement	GRR	Jackson	90 min

Nearby

Special Weather Statements in Michigan, 2017 Every special weather statement in 2017

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; radar from the NEXRAD Level II archive.