Alert archive / Nebraska / Tornado Watches in 1999
Tornado Watch 484
The Storm Prediction Center issued this tornado watch at Jun 27, 1999, 7:15 PM MDT for Phillips County, Sedgwick County, Colorado; 41 counties in Nebraska. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 27, 1999, 7:15 PM MDT (01:15 UTC)
- Expired
- Jun 27, 1999, 11:00 PM MDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 43 counties
Phillips County, CO, Sedgwick County, CO, Adams County, NE, Arthur County, NE, Boone County, NE, Buffalo County, NE, Chase County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Webster County, NE, York County, NE
The radar
The North Platte radar (KLNX), 100 km from the middle of the area, began a volume at 01:17 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 7:37 PM MDT | Tornado Warning | LBF | Garden, Keith | 63 min |
| Jun 27, 7:55 PM MDT | Tornado Warning | LBF | Deuel | 35 min |
| Jun 27, 8:24 PM MDT | Tornado Warning | LBF | Keith, Perkins | 61 min |
| Jun 27, 9:01 PM MDT | Tornado Warning | LBF | Lincoln | 64 min |
| Jun 27, 10:24 PM MDT | Severe Thunderstorm Warning | LBF | Deuel | 66 min |
| Jun 27, 10:44 PM MDT | Tornado Warning | LBF | Deuel | 66 min |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.3 hours before the alert went out and 8 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
- 750 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1318 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 10.2
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 |
|---|---|---|---|---|
| Jun 27, 10:45 PM MDT | Severe Thunderstorm Watch | SPC | Kit Carson, Logan, Phillips, Sedgwick, Yuma | 6 hr |
Nearby
Tornado Watches in Nebraska, 1999Tornado Watches in Colorado, 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.