Alert archive / Missouri / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 264
The Storm Prediction Center issued this severe thunderstorm watch at May 7, 1997, 6:15 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 1997, 6:15 PM CDT (23:15 UTC)
- Expired
- May 8, 1997, 12:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 78 counties
Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Mercer County, IL, Rock Island County, IL, Atchison County, KS, Brown County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Adair County, MO, Andrew 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, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Knox County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO
The radar
The Pleasant Hill radar (KEAX), 118 km from the middle of the area, began a volume at 23:17 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 |
|---|---|---|---|---|
| May 7, 6:19 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 41 min |
| May 7, 6:43 PM CDT | Severe Thunderstorm Warning | TOP | Morris | 47 min |
| May 7, 7:15 PM CDT | Tornado Warning | TOP | Morris | 30 min |
| May 7, 7:19 PM CDT | Flash Flood Warning | EAX | Doniphan | 2 hr |
| May 7, 8:12 PM CDT | Severe Thunderstorm Warning | TOP | Coffey, Lyon, Osage | 48 min |
| May 7, 9:00 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Platte | 45 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 11.3 hours before the alert went out and 134 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
- 463 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 310 m²/s²
- 0-3 km storm-relative helicity
- 415 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
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 |
|---|---|---|---|---|
| May 7, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 22 more | 5 hr |
| May 7, 4:30 PM CDT | Tornado Watch | SPC | Barber, Butler, Chase, Comanche, Harper, Harvey and 11 more | 6 hr |
| May 7, 6:45 PM CDT | Tornado Watch | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 14 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 1997Severe Thunderstorm Watches in Iowa, 1997Severe Thunderstorm Watches in Kansas, 1997Every severe thunderstorm watch in 1997
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.