Alert archive / Michigan / Special Weather Statements in 2013

Special Weather Statement, NWS Grand Rapids, MI

August 7, 2013Eaton County, Michigan

NWS Grand Rapids, MI issued this special weather statement at Aug 7, 2013, 2:35 PM EDT for Eaton County, Michigan. It was in force for 55 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: Aug 7, 2013, 2:35 PM EDT (18:35 UTC)
Expired: Aug 7, 2013, 3:30 PM EDT
In force: 55 min
Issued by: NWS Grand Rapids, MI

County Eaton County, MI

The radar

The Grand Rapids radar (KGRR), 75 km from the middle of the area, began a volume at 18:35 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, 6.6 hours before the alert went out and 126 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: 1279 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

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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 Aug 7, 1:45 PM EDT, 50 minutes earlier.

Area forecast discussion, Aug 7, 1:45 PM EDT, 50 minutes before

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Hazardous weather outlook, Aug 7, 5:50 AM EDT, 8 hours 45 minutes before

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In the hours before

Local storm report, Aug 7, 9:42 AM EDT, 4 hours 53 minutes before

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Local storm report, Aug 7, 10:42 AM EDT, 3 hours 53 minutes before

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Local storm report, Aug 7, 11:55 AM EDT, 2 hours 40 minutes before

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Local storm report, Aug 7, 12:38 PM EDT, 1 hour 57 minutes before

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Special weather statement, Aug 7, 1:28 PM EDT, 1 hour 7 minutes before

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Special weather statement, Aug 7, 2:35 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
Aug 7, 2:21 AM EDT	Special Marine Warning	GRR		114 min
Aug 7, 2:28 AM EDT	Special Weather Statement	GRR	Lake, Mason, Newaygo, Oceana	2 hr
Aug 7, 2:51 AM EDT	Severe Thunderstorm Warning	GRR	Mason, Oceana	54 min
Aug 7, 3:20 AM EDT	Severe Thunderstorm Warning	GRR	Lake, Mecosta	55 min
Aug 7, 8:06 AM EDT	Special Marine Warning	GRR		54 min
Aug 7, 8:16 AM EDT	Severe Thunderstorm Warning	GRR	Van Buren	59 min
Aug 7, 8:42 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo	63 min
Aug 7, 8:46 AM EDT	Areal Flood Advisory	GRR	Van Buren	4 hr
Aug 7, 1:28 PM EDT	Special Weather Statement	GRR	Barry, Eaton	62 min

Nearby

Special Weather Statements in Michigan, 2013 Every special weather statement in 2013

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.