Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 2400

September 24, 200317 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Sep 24, 2003, 12:34 PM EDT for 17 counties in Michigan. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Sep 24, 2003, 12:34 PM EDT (16:34 UTC)
Expired: Sep 24, 2003, 2:30 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center

Counties Antrim County, MI, Cheboygan County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Lake County, MI, Manistee County, MI, Missaukee County, MI, Montmorency County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Roscommon County, MI, Wexford County, MI

The radar

The NCL Michigan radar (KAPX), 28 km from the middle of the area, began a volume at 16:38 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, 4.6 hours before the alert went out and 288 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: 1911 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 250 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
Sep 24, 1:41 PM EDT	Mesoscale Discussion	SPC	Allegan, Berrien, Branch, Cass, Kalamazoo, Saint Joseph and 1 more	2 hr
Sep 24, 2:20 PM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 23 more	7 hr
Sep 24, 3:58 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 14 more	62 min
Sep 24, 6:37 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 23 more	83 min

Nearby

Mesoscale Discussions in Michigan, 2003 Every mesoscale discussion in 2003

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.