Alert archive / Illinois / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 145
The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2002, 10:15 AM CDT for 36 counties in Illinois; 9 counties in Iowa; 30 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2002, 10:15 AM CDT (15:15 UTC)
- Expired
- Apr 24, 2002, 3:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 75 counties
Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clinton County, IL, DeWitt County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Jersey County, IL, Knox County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Warren County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, City of Saint Louis, MO, Clark County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 121 km from the middle of the area, began a volume at 15:18 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 24, 11:30 AM CDT | Severe Thunderstorm Warning | EAX | Schuyler | 30 min |
| Apr 24, 11:33 AM CDT | Severe Thunderstorm Warning | DMX | Davis | 42 min |
| Apr 24, 11:39 AM CDT | Severe Thunderstorm Warning | EAX | Adair, Putnam | 51 min |
| Apr 24, 12:08 PM CDT | Severe Thunderstorm Warning | EAX | Macon | 67 min |
| Apr 24, 12:31 PM CDT | Severe Thunderstorm Warning | DVN | Clark | 44 min |
| Apr 24, 12:40 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 50 min |
| Apr 24, 12:56 PM CDT | Severe Thunderstorm Warning | ILX | Morgan, Scott | 64 min |
| Apr 24, 1:26 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 64 min |
| Apr 24, 2:13 PM CDT | Severe Thunderstorm Warning | ILX | Sangamon | 47 min |
| Apr 24, 2:19 PM CDT | Severe Thunderstorm Warning | ILX | Cass | 41 min |
| Apr 24, 2:51 PM CDT | Severe Thunderstorm Warning | ILX | Menard | 39 min |
| Apr 24, 2:55 PM CDT | Severe Thunderstorm Warning | ILX | Mason | 50 min |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 3.3 hours before the alert went out and 237 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
- 28 J/kg
- Mixed-layer CIN
- -364 J/kg
- Mixed-layer LCL
- 846 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 17 more | 6 hr |
| Apr 24, 2:30 PM CDT | Tornado Watch | SPC | Adams, Alexander, Bond, Brown, Calhoun, Cass and 49 more | 6 hr |
| Apr 24, 3:30 PM CDT | Tornado Watch | SPC | Gallatin, Hardin | 5 hr |
| Apr 24, 7:30 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 34 more | 6 hr |
| Apr 24, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 5 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2002Severe Thunderstorm Watches in Missouri, 2002Severe Thunderstorm Watches in Iowa, 2002Every severe thunderstorm watch in 2002
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.