Alert archive / Nebraska / Mesoscale Discussions in 2009

Mesoscale Discussion 1192

June 17, 2009Fremont County, Mills County, Pottawattamie County, Iowa; 35 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2009, 11:33 PM CDT for Fremont County, Mills County, Pottawattamie County, Iowa; 35 counties in Nebraska. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2009, 11:33 PM CDT (04:33 UTC)
Expired: Jun 18, 2009, 1:00 AM CDT
In force: 87 min
Issued by: the Storm Prediction Center

All 38 counties

Fremont County, IA, Mills County, IA, Pottawattamie County, IA, Adams County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Washington County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 93 km from the middle of the area, began a volume at 04:32 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

Omaha, NE (KOAX), launched 00:00Z, 4.6 hours before the alert went out and 116 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: 1256 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1892 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Jun 17, 7:01 PM CDT	Tornado Watch	SPC	Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 12 more	5 hr
Jun 17, 8:04 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Fremont, Guthrie and 8 more	56 min
Jun 17, 9:04 PM CDT	Tornado Watch	SPC	Fremont, Mills, Montgomery, Page, Pottawattamie	3 hr
Jun 17, 11:07 PM CDT	Mesoscale Discussion	SPC	Allamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek	53 min
Jun 17, 11:53 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Allamakee, Appanoose, Audubon, Benton, Black Hawk and 68 more	6 hr
Jun 18, 1:01 AM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Decatur, Des Moines, Henry, Jefferson and 6 more	89 min
Jun 18, 3:20 AM CDT	Mesoscale Discussion	SPC	Davis, Des Moines, Henry, Iowa, Jefferson, Johnson and 12 more	85 min
Jun 18, 4:20 AM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	4 hr
Jun 18, 6:41 AM CDT	Mesoscale Discussion	SPC	Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler and 31 more	94 min
Jun 18, 7:04 AM CDT	Severe Thunderstorm Watch	SPC	Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Chickasaw and 20 more	4 hr
Jun 18, 9:42 AM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 8 more	93 min
Jun 18, 10:11 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 11 more	6 hr
Jun 18, 1:17 PM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 11 more	88 min
Jun 18, 3:15 PM CDT	Mesoscale Discussion	SPC	Black Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 25 more	90 min
Jun 18, 6:52 PM CDT	Mesoscale Discussion	SPC	Lyon, Sioux	113 min
Jun 17, 10:34 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Chase, Cheyenne, Deuel, Garden and 12 more	56 min
Jun 17, 11:01 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Boyd, Brown, Cherry, Cheyenne and 19 more	6 hr
Jun 18, 1:46 AM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Boyd, Brown, Cherry, Cheyenne and 20 more	89 min

Nearby

Mesoscale Discussions in Nebraska, 2009 Mesoscale Discussions in Iowa, 2009 Every mesoscale discussion in 2009

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.