Alert archive / Iowa / Mesoscale Discussions in 2006

Mesoscale Discussion 730

May 2, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 2, 2006, 7:56 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 2, 2006, 7:56 PM CDT (00:56 UTC)
Expired: May 2, 2006, 9:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 36 counties

Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Yellow Medicine County, MN, Burt County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Thurston County, NE, Union County, SD

The radar

The Sioux Falls radar (KFSD), 78 km from the middle of the area, began a volume at 00:56 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

Aberdeen, SD (KABR), launched 00:00Z, 0.9 hours before the alert went out and 273 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: 1117 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 267 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
May 2, 7:18 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills	117 min
May 2, 9:41 PM CDT	Mesoscale Discussion	SPC	Fremont, Page, Ringgold, Taylor	94 min
May 3, 2:59 AM CDT	Mesoscale Discussion	SPC	Page, Taylor	2 hr

Nearby

Mesoscale Discussions in Iowa, 2006 Mesoscale Discussions in Minnesota, 2006 Mesoscale Discussions in Nebraska, 2006 Every mesoscale discussion in 2006

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.