Alert archive / Michigan / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 268

May 12, 200045 counties in Michigan

The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2000, 2:30 AM EDT for 45 counties in Michigan. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 12, 2000, 2:30 AM EDT (06:30 UTC)
Expired: May 12, 2000, 8:00 AM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 45 counties

Allegan County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Manistee County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Ottawa County, MI, Roscommon County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Wexford County, MI

The radar

The Grand Rapids radar (KGRR), 48 km from the middle of the area, began a volume at 06:31 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.

Warnings issued inside it

5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 12, 2:41 AM EDT	Severe Thunderstorm Warning	GRR	Ottawa	49 min
May 12, 2:55 AM EDT	Severe Thunderstorm Warning	GRR	Allegan	50 min
May 12, 3:05 AM EDT	Severe Thunderstorm Warning	GRR	Kent	40 min
May 12, 3:20 AM EDT	Severe Thunderstorm Warning	GRR	Ionia, Montcalm	40 min
May 12, 4:24 AM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	21 min

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 6.5 hours before the alert went out and 133 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: 1303 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 631 m²/s²
0-3 km storm-relative helicity: 958 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
May 12, 1:00 PM EDT	Tornado Watch	SPC	Arenac, Bay, Benzie, Clare, Crawford, Gladwin and 24 more	5 hr
May 12, 3:00 PM EDT	Tornado Watch	SPC	Allegan, Barry, Berrien, Calhoun, Cass, Clinton and 8 more	6 hr
May 12, 3:30 PM EDT	Severe Thunderstorm Watch	SPC	Menominee	6 hr
May 12, 4:45 PM EDT	Tornado Watch	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 35 more	5 hr

Nearby

Severe Thunderstorm Watches in Michigan, 2000 Every severe thunderstorm watch in 2000

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.