Alert archive / Iowa / Mesoscale Discussions in 2016
Mesoscale Discussion 1304
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2016, 2:06 AM CDT for 38 counties in Iowa; Dakota County, Thurston County, Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2016, 2:06 AM CDT (07:06 UTC)
- Expired
- Jul 17, 2016, 4:30 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 40 counties
Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Dickinson County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Ida County, IA, Jasper County, IA, Kossuth County, IA, Marshall County, IA, Monona County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Dakota County, NE, Thurston County, NE
The radar
The Des Moines radar (KDMX), 117 km from the middle of the area, began a volume at 07:06 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, 7.1 hours before the alert went out and 175 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.
- Mixed-layer CAPE
- 2380 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1058 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 429 m²/s²
- Significant tornado parameter
- 2.7
- Supercell composite
- 25.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 8:55 PM CDT | Mesoscale Discussion | SPC | Cerro Gordo, Clay, Dickinson, Emmet, Hancock, Kossuth and 7 more | 95 min |
| Jul 17, 7:00 AM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Louisa | 2 hr |
| Jul 17, 3:03 PM CDT | Mesoscale Discussion | SPC | Banner, Cheyenne, Deuel, Dundy, Kimball, Morrill and 1 more | 57 min |
Nearby
Mesoscale Discussions in Iowa, 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.