Alert archive / Nebraska / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 854
The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2003, 2:35 PM MDT for Sedgwick County, Colorado; 15 counties in Nebraska; Tripp County, South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2003, 2:35 PM MDT (20:35 UTC)
- Expired
- Aug 9, 2003, 8:00 PM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Sedgwick County, CO, Arthur County, NE, Blaine County, NE, Brown County, NE, Cherry County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Sheridan County, NE, Thomas County, NE, Tripp County, SD
The radar
The North Platte radar (KLNX), 76 km from the middle of the area, began a volume at 20:37 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.
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:09 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 66 min |
| Aug 9, 3:30 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 60 min |
| Aug 9, 3:31 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Grant | 59 min |
| Aug 9, 3:41 PM MDT | Severe Thunderstorm Warning | LBF | Cherry, Sheridan | 64 min |
| Aug 9, 4:13 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 62 min |
| Aug 9, 4:35 PM MDT | Severe Thunderstorm Warning | LBF | Grant, Hooker | 55 min |
| Aug 9, 4:56 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 64 min |
| Aug 9, 5:16 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 59 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.6 hours before the alert went out and 130 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
- 73 J/kg
- Mixed-layer CIN
- -344 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 1:52 PM MDT | Mesoscale Discussion | SPC | Sedgwick | 113 min |
| Aug 9, 4:15 PM MDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Boyd, Cedar, Garfield, Greeley and 9 more | 6 hr |
| Aug 9, 10:02 AM MDT | Mesoscale Discussion | SPC | Brown, Campbell, Dewey, Edmunds, Faulk, McPherson and 4 more | 118 min |
| Aug 9, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Bennett, Brookings, Brown, Brule and 29 more | 5 hr |
| Aug 9, 2:38 PM MDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Brookings, Brown, Brule and 28 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2003Severe Thunderstorm Watches in Colorado, 2003Severe Thunderstorm Watches in South Dakota, 2003Every severe thunderstorm watch in 2003
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.