Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 1255

June 8, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2005, 8:02 PM CDT for 4 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2005, 8:02 PM CDT (01:02 UTC)
Expired: Jun 8, 2005, 9:00 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 34 counties

Adair County, IA, Adams County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Jackson County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clinton County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Cass County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE

The radar

The Omaha radar (KOAX), 106 km from the middle of the area, began a volume at 01:02 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 440Jun 8, 8:35 PM CDT

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.0 hours before the alert went out and 106 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: 822 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1464 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

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
Jun 9, 3:58 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 13 more	2 hr
Jun 8, 7:26 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Barber, Bourbon, Butler and 40 more	94 min
Jun 8, 8:35 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Barber, Barton, Bourbon and 50 more	7 hr
Jun 8, 11:38 PM CDT	Mesoscale Discussion	SPC	Allen, Barber, Bourbon, Butler, Chase, Chautauqua and 25 more	97 min
Jun 9, 1:32 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Gove, Gray, Haskell, Lane and 4 more	2 hr
Jun 9, 2:10 PM CDT	Tornado Watch	SPC	Cheyenne, Clark, Comanche, Decatur, Edwards, Ellis and 29 more	9 hr
Jun 9, 5:28 PM CDT	Mesoscale Discussion	SPC	Barton, Cloud, Decatur, Edwards, Ellis, Ellsworth and 26 more	92 min
Jun 9, 5:50 PM CDT	Tornado Watch	SPC	Cloud, Dickinson, Ellsworth, Jewell, Lincoln, Mitchell and 6 more	5 hr
Jun 9, 5:30 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Deuel	90 min
Jun 9, 6:20 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Deuel, Kimball	6 hr

Nearby

Mesoscale Discussions in Iowa, 2005 Mesoscale Discussions in Missouri, 2005 Mesoscale Discussions in Nebraska, 2005 Every mesoscale discussion in 2005

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.