Alert archive / Nebraska / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 640
The Storm Prediction Center issued this severe thunderstorm watch at Jul 29, 2001, 9:45 PM CDT for 22 counties in Nebraska. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 29, 2001, 9:45 PM CDT (02:45 UTC)
- Expired
- Jul 30, 2001, 2:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Antelope County, NE, Boone County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Sherman County, NE, Stanton County, NE, Valley County, NE, Wheeler County, NE
The radar
The Grand Island radar (KUEX), 117 km from the middle of the area, began a volume at 02:44 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 10:09 PM CDT | Severe Thunderstorm Warning | LBF | Wheeler | 66 min |
| Jul 29, 10:34 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone | 41 min |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.8 hours before the alert went out and 125 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
- 3173 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 2217 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.2
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 |
|---|---|---|---|---|
| Jul 30, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Box Butte, Cherry, Dawes, Garden and 9 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2001Every severe thunderstorm watch in 2001
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.