Alert archive / Nebraska / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 691
The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2004, 4:55 PM CDT for 21 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 4:55 PM CDT (21:55 UTC)
- Expired
- Aug 2, 2004, 10:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Antelope County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Cedar County, NE, Colfax County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Rock County, NE, Stanton County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE
The radar
The North Platte radar (KLNX), 145 km from the middle of the area, began a volume at 21:58 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:10 PM CDT | Severe Thunderstorm Warning | LBF | Keya Paha, Rock | 65 min |
| Aug 2, 6:25 PM CDT | Severe Thunderstorm Warning | LBF | Keya Paha | 50 min |
| Aug 2, 6:52 PM CDT | Flash Flood Warning | LBF | Keya Paha, Rock | 113 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, 9.9 hours before the alert went out and 194 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
- 9 J/kg
- Mixed-layer CIN
- -668 J/kg
- Mixed-layer LCL
- 3509 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boyd, Burt, Cedar, Cuming, Dakota and 9 more | 5 hr |
| Aug 2, 3:02 AM CDT | Mesoscale Discussion | SPC | Antelope, Burt, Cedar, Cuming, Dakota, Dixon and 8 more | 58 min |
| Aug 2, 4:56 AM CDT | Mesoscale Discussion | SPC | Nemaha, Richardson | 94 min |
| Aug 2, 4:23 PM CDT | Mesoscale Discussion | SPC | Antelope, Boyd, Brown, Cedar, Cherry, Dixon and 7 more | 37 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2004Every severe thunderstorm watch in 2004
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.