Alert archive / Michigan / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 42, NWS Grand Rapids, MI

June 28, 2013Jackson County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 28, 2013, 3:52 PM EDT for Jackson County, Michigan. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 28, 2013, 3:52 PM EDT (19:52 UTC)
Expired: Jun 28, 2013, 4:30 PM EDT
In force: 38 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Jackson County, MI

The radar

The Detroit radar (KDTX), 93 km from the middle of the area, began a volume at 19:52 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, 7.9 hours before the alert went out and 97 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: 360 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jun 28, 3:23 PM EDT, 29 minutes earlier.

Area forecast discussion, Jun 28, 3:23 PM EDT, 29 minutes before

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Hazardous weather outlook, Jun 28, 4:24 AM EDT, 11 hours 28 minutes before

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In the hours before

Special weather statement, Jun 28, 1:29 PM EDT, 2 hours 23 minutes before

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Special weather statement, Jun 28, 2:03 PM EDT, 1 hour 49 minutes before

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Local storm report, Jun 28, 3:45 PM EDT, 7 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
Jun 28, 3:42 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	63 min
Jun 28, 4:32 PM EDT	Special Weather Statement	GRR	Clare, Clinton, Eaton, Gratiot, Ingham, Ionia and 6 more	58 min
Jun 28, 5:36 PM EDT	Areal Flood Advisory	GRR	Clinton, Eaton, Ingham, Ionia	6 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2013 Every severe thunderstorm warning 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.