Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 1408
The Storm Prediction Center issued this mesoscale discussion at Sep 1, 2018, 9:39 PM CDT for 11 counties in Kansas; 19 counties in Nebraska. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2018, 9:39 PM CDT (02:39 UTC)
- Expired
- Sep 1, 2018, 11:15 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 30 counties
Cloud County, KS, Ellis County, KS, Jewell County, KS, Lincoln County, KS, Marshall County, KS, Mitchell County, KS, Osborne County, KS, Republic County, KS, Russell County, KS, Smith County, KS, Washington County, KS, Cass County, NE, Clay County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Webster County, NE
The radar
The Grand Island radar (KUEX), 106 km from the middle of the area, began a volume at 02:43 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
Topeka, KS (KFOE), launched 00:00Z, 2.7 hours before the alert went out and 187 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
- 3190 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1352 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
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 |
|---|---|---|---|---|
| Sep 2, 3:20 PM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 19 more | 115 min |
| Sep 2, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Clay, Cloud, Dickinson, Edwards, Ellis and 25 more | 4 hr |
| Sep 1, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | Gage, Johnson, Nemaha, Otoe, Pawnee, Richardson | 5 hr |
| Sep 1, 10:27 PM CDT | Mesoscale Discussion | SPC | Nemaha, Richardson | 63 min |
| Sep 2, 2:24 PM CDT | Mesoscale Discussion | SPC | Nemaha, Richardson | 2 hr |
Nearby
Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Kansas, 2018Every mesoscale discussion in 2018
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.