Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 2044

August 1, 200313 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Aug 1, 2003, 12:22 PM EDT for 13 counties in Michigan. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Aug 1, 2003, 12:22 PM EDT (16:22 UTC)
Expired: Aug 1, 2003, 2:15 PM EDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Bay County, MI, Calhoun County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Lenawee County, MI, Livingston County, MI, Monroe County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI

The radar

The Detroit radar (KDTX), 51 km from the middle of the area, began a volume at 16:24 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 826Aug 1, 3:45 PM EDT

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 4.4 hours before the alert went out and 54 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: 212 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Aug 1, 10:45 AM EDT	Severe Thunderstorm Watch	SPC	Barry, Branch, Calhoun, Cass, Clinton, Eaton and 15 more	5 hr
Aug 1, 2:45 PM EDT	Mesoscale Discussion	SPC	Branch, Hillsdale, Lenawee, Monroe, Oakland, Saint Joseph and 1 more	60 min
Aug 1, 3:45 PM EDT	Severe Thunderstorm Watch	SPC	Berrien, Branch, Calhoun, Cass, Hillsdale, Jackson and 6 more	6 hr
Aug 1, 7:34 PM EDT	Mesoscale Discussion	SPC	Berrien, Branch, Calhoun, Cass, Hillsdale, Jackson and 4 more	86 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.