Alert archive / Michigan / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 32, NWS Grand Rapids, MI

June 23, 2010Allegan County, Kalamazoo County, Van Buren County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 23, 2010, 8:06 AM EDT for Allegan County, Kalamazoo County, Van Buren County, Michigan. It was in force for 54 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 23, 2010, 8:06 AM EDT (12:06 UTC)
Expired: Jun 23, 2010, 9:00 AM EDT
In force: 54 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Allegan County, MI, Kalamazoo County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 68 km from the middle of the area, began a volume at 12:07 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 23, 7:40 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 0.1 hours before the alert went out and 208 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: 243 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1258 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 23, 7:59 AM EDT, 7 minutes earlier.

Area forecast discussion, Jun 23, 7:59 AM EDT, 7 minutes before

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Hazardous weather outlook, Jun 23, 4:09 AM EDT, 3 hours 57 minutes before

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In the hours before

Special weather statement, Jun 23, 7:06 AM EDT, 1 hour before

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Special weather statement, Jun 23, 7:57 AM 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
Jun 23, 7:01 AM EDT	Special Marine Warning	GRR		89 min
Jun 23, 7:06 AM EDT	Special Weather Statement	GRR	Allegan, Kent, Muskegon, Newaygo, Oceana, Ottawa	54 min
Jun 23, 7:21 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Newaygo, Oceana, Ottawa	54 min
Jun 23, 7:30 AM EDT	Flash Flood Watch	GRR	Allegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 9 more	16 hr
Jun 23, 7:57 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	63 min
Jun 23, 8:15 AM EDT	Special Weather Statement	GRR	Kent, Mecosta, Montcalm, Newaygo	75 min
Jun 23, 8:24 AM EDT	Special Marine Warning	GRR		51 min
Jun 23, 8:50 AM EDT	Special Weather Statement	GRR	Barry, Calhoun, Eaton, Kalamazoo	55 min
Jun 23, 9:29 AM EDT	Special Weather Statement	GRR	Calhoun, Clinton, Eaton, Ingham, Jackson	61 min
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Ionia	11 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Ingham	11 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Barry	49 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Allegan	5 days
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Kalamazoo	3 days
Jun 23, 10:15 AM EDT	Special Weather Statement	GRR	Jackson	60 min
Jun 23, 1:47 PM EDT	Small Craft Advisory	GRR		21 hr
Jun 23, 7:21 PM EDT	Special Marine Warning	GRR		84 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2010 Every severe thunderstorm warning in 2010

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.