Alert archive / Illinois / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 703
The Storm Prediction Center issued this severe thunderstorm watch at Aug 22, 2000, 7:00 PM CDT for 18 counties in Illinois; 16 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2000, 7:00 PM CDT (00:00 UTC)
- Expired
- Aug 23, 2000, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Greene County, IL, Hancock County, IL, Jersey County, IL, Logan County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Audrain County, MO, Callaway County, MO, City of Saint Louis, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 82 km from the middle of the area, began a volume at 00:01 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 7:27 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 63 min |
| Aug 22, 7:28 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 62 min |
| Aug 22, 8:18 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Shelby | 57 min |
| Aug 22, 8:22 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 53 min |
| Aug 22, 8:42 PM CDT | Severe Thunderstorm Warning | ILX | Scott | 63 min |
| Aug 22, 9:05 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene | 55 min |
| Aug 22, 9:19 PM CDT | Severe Thunderstorm Warning | ILX | Morgan | 41 min |
| Aug 22, 9:38 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 52 min |
| Aug 22, 10:20 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 40 min |
| Aug 22, 10:55 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 35 min |
| Aug 22, 11:02 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 43 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.0 hours before the alert went out and 233 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
- 3363 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.3
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 Illinois, 2000Severe Thunderstorm Watches in Missouri, 2000Every severe thunderstorm watch in 2000
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.