Alert archive / Michigan / Mesoscale Discussions in 2005

Mesoscale Discussion 442

March 30, 200515 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2005, 7:47 PM EST for 15 counties in Michigan. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2005, 7:47 PM EST (00:47 UTC)
Expired: Mar 30, 2005, 8:45 PM EST
In force: 58 min
Issued by: the Storm Prediction Center

Counties Allegan County, MI, Barry County, MI, Calhoun County, MI, Clare County, MI, Ionia County, MI, Isabella County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mecosta County, MI, Montcalm County, MI, Newaygo County, MI, Osceola County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 41 km from the middle of the area, began a volume at 00:50 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 108Mar 30, 8:05 PM EST

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.8 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1332 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 8:05 PM EST	Severe Thunderstorm Watch	SPC	Allegan, Barry, Clare, Isabella, Kalamazoo, Kent and 10 more	6 hr
Mar 30, 8:30 PM EST	Severe Thunderstorm Watch	SPC	Berrien	8 hr
Mar 30, 11:12 PM EST	Mesoscale Discussion	SPC	Allegan, Barry, Clare, Ionia, Isabella, Kalamazoo and 8 more	63 min
Mar 30, 11:40 PM EST	Mesoscale Discussion	SPC	Branch, Cass, Hillsdale, Lenawee, Saint Joseph	95 min

Nearby

Mesoscale Discussions in Michigan, 2005 Every mesoscale discussion in 2005

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.