Alert archive / Nebraska / Tornado Watches in 1999
Tornado Watch 133
The Storm Prediction Center issued this tornado watch at Apr 8, 1999, 12:15 PM CDT for 16 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 1999, 12:15 PM CDT (17:15 UTC)
- Expired
- Apr 8, 1999, 5:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Antelope County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 17:17 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 12:25 PM CDT | Tornado Warning | OAX | Antelope, Boone | 50 min |
| Apr 8, 12:39 PM CDT | Tornado Warning | OAX | Colfax | 36 min |
| Apr 8, 12:56 PM CDT | Tornado Warning | OAX | Cuming, Stanton | 49 min |
| Apr 8, 1:12 PM CDT | Tornado Warning | OAX | Dodge | 33 min |
| Apr 8, 1:13 PM CDT | Severe Thunderstorm Warning | OAX | Douglas, Washington | 47 min |
| Apr 8, 1:17 PM CDT | Tornado Warning | OAX | Douglas, Washington | 48 min |
| Apr 8, 1:28 PM CDT | Tornado Warning | OAX | Burt, Cuming | 52 min |
| Apr 8, 2:05 PM CDT | Tornado Warning | OAX | Burt | 50 min |
| Apr 8, 2:10 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 50 min |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 5.3 hours before the alert went out and 320 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
- 200 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 677 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 419 m²/s²
- 0-3 km storm-relative helicity
- 469 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 8, 6:30 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Antelope, Blaine, Boone, Buffalo, Burt and 43 more | 6 hr |
| Apr 8, 11:45 AM CDT | Tornado Watch | SPC | Butler, Cass, Fillmore, Gage, Jefferson, Johnson and 12 more | 5 hr |
Nearby
Tornado Watches in Nebraska, 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.