Alert archive / Missouri / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 161
The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2001, 1:30 AM CDT for 26 counties in Kansas; 34 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2001, 1:30 AM CDT (06:30 UTC)
- Expired
- Apr 21, 2001, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 60 counties
Atchison County, KS, Brown County, KS, Chase County, KS, Clay County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Grundy County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO
The radar
The Pleasant Hill radar (KEAX), 93 km from the middle of the area, began a volume at 06:33 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 |
|---|---|---|---|---|
| Apr 21, 1:37 AM CDT | Severe Thunderstorm Warning | TOP | Shawnee, Wabaunsee | 23 min |
| Apr 21, 1:43 AM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Geary, Morris | 32 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 6.5 hours before the alert went out and 78 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
- 2129 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1308 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 8.9
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 |
|---|---|---|---|---|
| Apr 20, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 27 more | 6 hr |
| Apr 21, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Callaway, Crawford, Franklin, Gasconade, Jefferson and 14 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2001Severe Thunderstorm Watches in Kansas, 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.