Alert archive / Nebraska / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 531
The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2001, 4:30 PM CDT for 18 counties in Iowa; 20 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2001, 4:30 PM CDT (21:30 UTC)
- Expired
- Jul 8, 2001, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cherokee County, IA, Crawford County, IA, Greene County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Monona County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Shelby County, IA, Webster County, IA, Woodbury County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 98 km from the middle of the area, began a volume at 21:31 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 8, 5:03 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Pierce, Wayne | 27 min |
| Jul 8, 5:29 PM CDT | Severe Thunderstorm Warning | OAX | Pierce, Wayne | 61 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.5 hours before the alert went out and 98 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
- 363 J/kg
- Mixed-layer CIN
- -414 J/kg
- Mixed-layer LCL
- 2161 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 62 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 8, 11:15 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Des Moines, Henry, Iowa, Jefferson and 9 more | 7 hr |
| Jul 7, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Cherry, Custer, Deuel and 10 more | 5 hr |
| Jul 8, 3:45 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Butler, Colfax, Cuming, Dodge, Garfield and 11 more | 3 hr |
| Jul 8, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2001Severe Thunderstorm Watches in Iowa, 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.