Alert archive / Iowa / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 752
The Storm Prediction Center issued this severe thunderstorm watch at Sep 22, 2001, 7:00 PM CDT for 33 counties in Iowa; 32 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 22, 2001, 7:00 PM CDT (00:00 UTC)
- Expired
- Sep 23, 2001, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 65 counties
Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Adams County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Webster County, NE, York County, NE
The radar
The Omaha radar (KOAX), 12 km from the middle of the area, began a volume at 00:05 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 7:11 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 49 min |
| Sep 22, 7:33 PM CDT | Tornado Warning | GID | Clay | 57 min |
| Sep 22, 7:39 PM CDT | Severe Thunderstorm Warning | GID | Fillmore | 51 min |
| Sep 22, 7:48 PM CDT | Severe Thunderstorm Warning | GID | York | 42 min |
| Sep 22, 8:03 PM CDT | Tornado Warning | GID | Fillmore, Nuckolls, Thayer | 57 min |
| Sep 22, 8:07 PM CDT | Severe Thunderstorm Warning | OAX | Saline, Seward | 38 min |
| Sep 22, 8:10 PM CDT | Tornado Warning | GID | Fillmore | 50 min |
| Sep 22, 8:30 PM CDT | Severe Thunderstorm Warning | GID | Fillmore, York | 45 min |
| Sep 22, 8:35 PM CDT | Severe Thunderstorm Warning | GID | Nuckolls, Thayer | 55 min |
| Sep 22, 8:42 PM CDT | Severe Thunderstorm Warning | OAX | Seward | 33 min |
| Sep 22, 8:44 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 31 min |
| Sep 22, 8:52 PM CDT | Severe Thunderstorm Warning | GID | Clay | 23 min |
| Sep 22, 9:13 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Lancaster, Otoe | 32 min |
| Sep 22, 9:26 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 34 min |
| Sep 22, 9:57 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 48 min |
| Sep 22, 10:07 PM CDT | Severe Thunderstorm Warning | OAX | Cass | 23 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.0 hours before the alert went out and 12 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
- 2845 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 946 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Severe Thunderstorm Watches in Iowa, 2001Severe 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.