Alert archive / Nebraska / Mesoscale Discussions in 2009
Mesoscale Discussion 908
The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2009, 2:55 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2009, 2:55 PM CDT (19:55 UTC)
- Expired
- Jun 1, 2009, 5:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 97 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Cass County, IA, Clarke County, IA, Decatur County, IA, Fremont County, IA, Lucas County, IA, Madison County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Brown County, KS, Cheyenne County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Doniphan County, KS, Gove County, KS, Graham County, KS, Jewell County, KS, Logan County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Pottawatomie County, KS, Rawlins County, KS, Republic County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Wallace County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Worth County, MO, Adams County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Chase County, NE, Clay County, NE, Dawson County, NE, Douglas County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 33 km from the middle of the area, began a volume at 19:58 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, 7.9 hours before the alert went out and 221 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
- 349 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1784 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:31 PM CDT | Mesoscale Discussion | SPC | Clinton, Scott | 59 min |
| Jun 1, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | Scott | 7 hr |
| Jun 1, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Cedar, Clarke and 31 more | 8 hr |
| Jun 1, 5:25 PM CDT | Mesoscale Discussion | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 12 more | 2 hr |
| Jun 1, 6:52 PM CDT | Mesoscale Discussion | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 14 more | 83 min |
Nearby
Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Kansas, 2009Mesoscale Discussions in Iowa, 2009Every 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.