Alert archive / Nebraska / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 580
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2001, 6:45 PM CDT for 50 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2001, 6:45 PM CDT (23:45 UTC)
- Expired
- Jul 19, 2001, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Adams County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Washington County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 88 km from the middle of the area, began a volume at 23:47 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 6:55 PM CDT | Severe Thunderstorm Warning | OAX | Jefferson | 50 min |
| Jul 18, 7:04 PM CDT | Tornado Warning | GID | Thayer | 26 min |
| Jul 18, 7:44 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson | 46 min |
| Jul 18, 8:26 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Johnson, Pawnee | 34 min |
| Jul 18, 10:09 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 36 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 136 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
- 592 J/kg
- Mixed-layer CIN
- -482 J/kg
- Mixed-layer LCL
- 1435 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 257 m²/s²
- 0-3 km storm-relative helicity
- 264 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 17, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Burt, Butler, Cass, Colfax and 23 more | 5 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.