Alert archive / Nebraska / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 641
The Storm Prediction Center issued this severe thunderstorm watch at Jul 30, 2001, 2:00 PM MDT for 15 counties in Nebraska; 7 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2001, 2:00 PM MDT (20:00 UTC)
- Expired
- Jul 30, 2001, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Arthur County, NE, Banner County, NE, Box Butte County, NE, Cherry County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Jackson County, SD, Mellette County, SD, Oglala Lakota County, SD, Todd County, SD
The radar
The Rapid City radar (KUDX), 149 km from the middle of the area, began a volume at 20:02 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 |
|---|---|---|---|---|
| Jul 30, 4:57 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 63 min |
| Jul 30, 5:58 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 47 min |
| Jul 30, 6:33 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 57 min |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.0 hours before the alert went out and 332 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3835 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -11 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 |
|---|---|---|---|---|
| Jul 29, 8:45 PM MDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Buffalo, Custer, Dawson, Garfield and 16 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2001Severe Thunderstorm Watches in South Dakota, 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.