Alert archive / Iowa / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 792
The Storm Prediction Center issued this severe thunderstorm watch at Oct 22, 2001, 12:30 PM CDT for 29 counties in Iowa; 15 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 22, 2001, 12:30 PM CDT (17:30 UTC)
- Expired
- Oct 22, 2001, 6:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Lucas County, IA, Madison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Story County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Lancaster County, NE, Otoe County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 57 km from the middle of the area, began a volume at 17:31 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 12:47 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 43 min |
| Oct 22, 1:05 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 25 min |
| Oct 22, 1:29 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery | 46 min |
| Oct 22, 1:32 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 43 min |
| Oct 22, 1:55 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 50 min |
| Oct 22, 2:09 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 51 min |
| Oct 22, 2:22 PM CDT | Severe Thunderstorm Warning | DMX | Union | 53 min |
| Oct 22, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 57 min |
| Oct 22, 2:55 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Warren | 50 min |
| Oct 22, 3:14 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Union | 46 min |
| Oct 22, 3:37 PM CDT | Severe Thunderstorm Warning | DMX | Lucas | 53 min |
| Oct 22, 3:59 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe, Wayne | 46 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 5.5 hours before the alert went out and 57 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
- 699 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Oct 22, 4:00 PM CDT | Tornado Watch | SPC | Appanoose, Clarke, Davis, Decatur, Des Moines, Henry and 14 more | 5 hr |
| Oct 22, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Scott | 5 hr |
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.