Alert archive / Michigan / Special Weather Statements in 2008

Special Weather Statement, NWS Grand Rapids, MI

August 23, 2008Clare County, Isabella County, Mecosta County, Michigan

NWS Grand Rapids, MI issued this special weather statement at Aug 23, 2008, 4:00 PM EDT for Clare County, Isabella County, Mecosta County, Michigan. It was in force for 60 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 23, 2008, 4:00 PM EDT (20:00 UTC)
Expired: Aug 23, 2008, 5:00 PM EDT
In force: 60 min
Issued by: NWS Grand Rapids, MI

Counties Clare County, MI, Isabella County, MI, Mecosta County, MI

The radar

The Grand Rapids radar (KGRR), 98 km from the middle of the area, began a volume at 20:02 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

Alpena, MI (KAPX), launched 12:00Z, 8.0 hours before the alert went out and 258 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: 832 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

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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 23, 2:39 AM EDT	Small Craft Advisory	GRR		12 hr
Aug 23, 2:33 PM EDT	Special Weather Statement	GRR	Clare, Isabella, Mecosta, Newaygo, Osceola	87 min
Aug 23, 4:46 PM EDT	Special Weather Statement	GRR	Isabella, Mecosta	59 min
Aug 23, 5:54 PM EDT	Special Weather Statement	GRR	Isabella, Montcalm	66 min
Aug 23, 6:52 PM EDT	Special Weather Statement	GRR	Clinton, Gratiot, Ionia, Montcalm	68 min

Nearby

Special Weather Statements in Michigan, 2008 Every special weather statement in 2008

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.