Alert archive / Iowa / Mesoscale Discussions in 2016

Mesoscale Discussion 1248

July 11, 20165 states

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2016, 3:16 PM CDT for 5 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 11, 2016, 3:16 PM CDT (20:16 UTC)
Expired
Jul 11, 2016, 5:15 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 118 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Hennepin County, MN, Jackson County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Rock County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Atchison County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, York County, NE, Clay County, SD, Lincoln County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Omaha radar (KOAX), 152 km from the middle of the area, began a volume at 20:19 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.3 hours before the alert went out and 153 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2016-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1239 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2016-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1239 J/kg
Mixed-layer CIN
-422 J/kg
Mixed-layer LCL
1275 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 3:48 PM CDTSevere Thunderstorm WatchSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 21 more7 hr
Jul 11, 4:03 PM CDTSevere Thunderstorm WatchSPCHarrison, Monona, Pottawattamie, Shelby6 hr
Jul 10, 10:16 PM CDTMesoscale DiscussionSPCBecker, Big Stone, Clay, Clearwater, Grant, Mahnomen and 8 more89 min
Jul 10, 10:40 PM CDTSevere Thunderstorm WatchSPCBecker, Big Stone, Clay, Grant, Mahnomen, Marshall and 7 more6 hr
Jul 11, 1:01 AM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Benton, Big Stone, Cass and 27 more89 min
Jul 11, 1:51 AM CDTSevere Thunderstorm WatchSPCAitkin, Beltrami, Benton, Cass, Clearwater, Crow Wing and 13 more5 hr
Jul 11, 3:22 AM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Chisago, Crow Wing, Isanti and 5 more83 min
Jul 11, 4:06 AM CDTMesoscale DiscussionSPCBecker, Big Stone, Clay, Grant, Otter Tail, Traverse and 1 more84 min
Jul 11, 5:17 PM CDTMesoscale DiscussionSPCAnoka, Benton, Chisago, Hennepin, Isanti, Kandiyohi and 5 more58 min
Jul 11, 5:31 PM CDTTornado WatchSPCAnoka, Benton, Chisago, Isanti, Kanabec, Kandiyohi and 5 more4 hr
Jul 11, 6:03 PM CDTSevere Thunderstorm WatchSPCPine5 hr
Jul 10, 7:35 PM CDTMesoscale DiscussionSPCCampbell, Corson, Dewey, Edmunds, McPherson, Perkins and 1 more55 min
Jul 10, 7:54 PM CDTMesoscale DiscussionSPCBrule, Buffalo, Dewey, Faulk, Haakon, Hand and 12 more96 min
Jul 11, 1:32 AM CDTMesoscale DiscussionSPCCampbell, Corson, McPherson58 min
Jul 11, 4:03 PM CDTMesoscale DiscussionSPCCampbell, Corson, McPherson, Walworth117 min

Nearby

Mesoscale Discussions in Iowa, 2016Mesoscale Discussions in Minnesota, 2016Mesoscale Discussions in Nebraska, 2016Every mesoscale discussion in 2016

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.