Alert archive / Missouri / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 159
The Storm Prediction Center issued this severe thunderstorm watch at Apr 18, 1997, 9:15 PM CDT for 24 counties in Illinois; Livingston County, Kentucky; 43 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 1997, 9:15 PM CDT (02:15 UTC)
- Expired
- Apr 19, 1997, 1:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 68 counties
Alexander County, IL, Bond County, IL, Calhoun County, IL, Clinton County, IL, Franklin County, IL, Greene County, IL, Jackson County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Macoupin County, IL, Madison County, IL, Massac County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Livingston County, KY, Audrain County, MO, Bollinger County, MO, Boone County, MO, Callaway County, MO, Cape Girardeau County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Perry County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, Shannon County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wayne County, MO
The radar
The St Louis radar (KLSX), 11 km from the middle of the area, began a volume at 02:16 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 |
|---|---|---|---|---|
| Apr 18, 9:44 PM CDT | Severe Thunderstorm Warning | EAX | Cooper | 31 min |
| Apr 18, 9:45 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 45 min |
| Apr 18, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 32 min |
| Apr 18, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 32 min |
| Apr 18, 10:07 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 38 min |
| Apr 18, 10:20 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 40 min |
| Apr 18, 10:25 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 50 min |
| Apr 18, 10:46 PM CDT | Severe Thunderstorm Warning | EAX | Howard | 29 min |
| Apr 18, 10:54 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 51 min |
| Apr 18, 11:17 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin, Madison | 43 min |
| Apr 18, 11:56 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Madison | 49 min |
| Apr 19, 12:34 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 41 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.3 hours before the alert went out and 249 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
- 2539 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Missouri, 1997Severe Thunderstorm Watches in Illinois, 1997Severe Thunderstorm Watches in Kentucky, 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.