Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 1446

June 29, 200426 counties in Michigan; 21 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2004, 4:04 PM EDT for 26 counties in Michigan; 21 counties in Wisconsin. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jun 29, 2004, 4:04 PM EDT (20:04 UTC)
Expired: Jun 29, 2004, 6:00 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center

All 47 counties

Arenac County, MI, Bay County, MI, Benzie County, MI, Clare County, MI, Genesee County, MI, Gladwin County, MI, Grand Traverse County, MI, Gratiot County, MI, Isabella County, MI, Kalkaska County, MI, Lake County, MI, Lapeer County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Roscommon County, MI, Saginaw County, MI, Tuscola County, MI, Wexford County, MI, Brown County, WI, Calumet County, WI, Chippewa County, WI, Door County, WI, Forest County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Price County, WI, Rusk County, WI, Shawano County, WI, Taylor County, WI, Vilas County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 48 km from the middle of the area, began a volume at 20:04 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.1 hours before the alert went out and 51 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: 51 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1470 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 125 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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Nearby

Mesoscale Discussions in Michigan, 2004 Mesoscale Discussions in Wisconsin, 2004 Every mesoscale discussion in 2004

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.