Alert archive / Missouri / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 723
The Storm Prediction Center issued this severe thunderstorm watch at Sep 7, 2001, 8:45 PM CDT for 7 counties in Illinois; 33 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 7, 2001, 8:45 PM CDT (01:45 UTC)
- Expired
- Sep 8, 2001, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Adams County, IL, Brown County, IL, Fulton County, IL, Hancock County, IL, McDonough County, IL, Pike County, IL, Schuyler County, IL, Adair County, MO, Audrain County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Henry County, MO, Howard County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO
The radar
The Pleasant Hill radar (KEAX), 138 km from the middle of the area, began a volume at 01:34 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 9:08 PM CDT | Severe Thunderstorm Warning | EAX | Carroll | 82 min |
| Sep 7, 9:14 PM CDT | Severe Thunderstorm Warning | EAX | Pettis, Saline | 76 min |
| Sep 7, 9:25 PM CDT | Severe Thunderstorm Warning | SGF | Benton | 65 min |
| Sep 7, 9:37 PM CDT | Severe Thunderstorm Warning | EAX | Chariton, Linn | 53 min |
| Sep 7, 9:58 PM CDT | Severe Thunderstorm Warning | SGF | Morgan | 62 min |
| Sep 7, 10:03 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Macon | 72 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 1.8 hours before the alert went out and 251 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
- 2654 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1003 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 4.7
- Supercell composite
- 19.6
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 |
|---|---|---|---|---|
| Sep 7, 8:45 PM CDT | Severe Thunderstorm Watch | SPC | Henderson, Henry, Mercer, Rock Island, Warren | 4 hr |
| Sep 7, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 10 more | 4 hr |
| Sep 7, 7:00 PM CDT | Tornado Watch | SPC | Barton, Cedar, Dade, Hickory, Jasper, McDonald and 3 more | 5 hr |
| Sep 7, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Camden, Christian, Crawford, Dade, Dallas and 17 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2001Severe Thunderstorm Watches in Illinois, 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.