Alert archive / Nebraska / Tornado Watches in 1999
Tornado Watch 512
The Storm Prediction Center issued this tornado watch at Jul 2, 1999, 8:30 PM CDT for 42 counties in Nebraska; Bon Homme County, South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 2, 1999, 8:30 PM CDT (01:30 UTC)
- Expired
- Jul 3, 1999, 1:30 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 43 counties
Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Knox County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, Bon Homme County, SD
The radar
The North Platte radar (KLNX), 83 km from the middle of the area, began a volume at 01:30 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 8:43 PM CDT | Tornado Warning | LBF | Keith, Lincoln, McPherson | 47 min |
| Jul 2, 9:15 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Lincoln, Logan | 60 min |
| Jul 2, 9:15 PM CDT | Severe Thunderstorm Warning | LBF | Thomas | 60 min |
| Jul 2, 9:29 PM CDT | Severe Thunderstorm Warning | LBF | Hooker, McPherson | 61 min |
| Jul 2, 10:20 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 60 min |
| Jul 2, 10:33 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 62 min |
| Jul 2, 10:56 PM CDT | Tornado Warning | LBF | Cherry | 64 min |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.5 hours before the alert went out and 31 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
- 5849 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 25.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | Boyd, Cherry, Keya Paha | 5 hr |
| Jul 2, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Bennett, Brule, Buffalo, Charles Mix and 28 more | 6 hr |
Nearby
Tornado Watches in Nebraska, 1999Tornado Watches in South Dakota, 1999Every tornado watch in 1999
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.