Alert archive / Kansas / Tornado Watches in 2002
Tornado Watch 112
The Storm Prediction Center issued this tornado watch at Apr 18, 2002, 4:00 PM CDT for 40 counties in Kansas; 13 counties in Missouri; 5 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2002, 4:00 PM CDT (21:00 UTC)
- Expired
- Apr 18, 2002, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 58 counties
Atchison County, KS, Barber County, KS, Brown County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Clay County, KS, Coffey County, KS, Cowley County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Kingman County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Reno County, KS, Riley County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Woodson County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Worth County, MO, Gage County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Topeka radar (KTWX), 81 km from the middle of the area, began a volume at 21:00 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
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 4:48 PM CDT | Severe Thunderstorm Warning | EAX | Atchison | 42 min |
| Apr 18, 5:15 PM CDT | Severe Thunderstorm Warning | ICT | McPherson | 45 min |
| Apr 18, 5:37 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 38 min |
| Apr 18, 5:57 PM CDT | Tornado Warning | ICT | McPherson | 48 min |
| Apr 18, 6:00 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Riley | 45 min |
| Apr 18, 6:36 PM CDT | Severe Thunderstorm Warning | EAX | Nodaway | 39 min |
| Apr 18, 6:44 PM CDT | Tornado Warning | ICT | McPherson | 46 min |
| Apr 18, 6:45 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie | 45 min |
| Apr 18, 6:53 PM CDT | Severe Thunderstorm Warning | EAX | Worth | 52 min |
| Apr 18, 6:58 PM CDT | Severe Thunderstorm Warning | ICT | Marion | 62 min |
| Apr 18, 7:08 PM CDT | Severe Thunderstorm Warning | TOP | Nemaha | 37 min |
| Apr 18, 7:17 PM CDT | Severe Thunderstorm Warning | EAX | Nodaway | 28 min |
| Apr 18, 7:25 PM CDT | Severe Thunderstorm Warning | EAX | Gentry | 65 min |
| Apr 18, 7:26 PM CDT | Severe Thunderstorm Warning | ICT | McPherson | 64 min |
| Apr 18, 7:37 PM CDT | Severe Thunderstorm Warning | EAX | Harrison | 53 min |
| Apr 18, 7:42 PM CDT | Severe Thunderstorm Warning | TOP | Brown | 48 min |
| Apr 18, 7:48 PM CDT | Severe Thunderstorm Warning | EAX | Worth | 57 min |
| Apr 18, 8:00 PM CDT | Severe Thunderstorm Warning | EAX | Nodaway | 45 min |
| Apr 18, 8:08 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 37 min |
| Apr 18, 8:19 PM CDT | Tornado Warning | ICT | McPherson | 41 min |
| Apr 18, 8:23 PM CDT | Severe Thunderstorm Warning | ICT | Marion | 67 min |
| Apr 18, 8:32 PM CDT | Severe Thunderstorm Warning | EAX | Harrison | 58 min |
| Apr 18, 9:00 PM CDT | Severe Thunderstorm Warning | EAX | Mercer | 60 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 9.0 hours before the alert went out and 122 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
- 1886 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1049 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 208 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 182030 SEL2 SPC WW 182026 KSZ000-MOZ000-NEZ000-190200- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 112 STORM PREDICTION CENTER NORMAN OK 326 PM CDT THU APR 18 2002 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN AND CENTRAL KANSAS NORTHWEST MISSOURI SOUTHEAST NEBRASKA EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 900 PM CDT. TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHWEST OF WICHITA KANSAS TO 55 MILES NORTHEAST OF FALLS CITY NEBRASKA. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 110...WW 111... DISCUSSION...THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY ALONG DRY LINE CENTRAL KS. WITH VERY UNSTABLE AIR MASS AND FAVORABLE SHEAR PROFILES...SUPERCELLS ARE LIKELY. ALONG WITH VERY LARGE HAIL...ISOLATED TORNADOES ARE EXPECTED. STORMS WILL MOVE NEWD OFF DRY LINE INTO ERN KS NWRN MO BY THIS EVENING. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM MOTION VECTOR 24030. ...HALES 370,0991 403,0962 403,0931 370,0961 WWUS20 KWNS 182030 SEL2 SPC WW 182026 KSZ000-MOZ000-NEZ000-190200- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 112 STORM PREDICTION CENTER NORMAN OK 326 PM CDT THU APR 18 2002 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN AND CENTRAL KANSAS NORTHWEST MISSOURI SOUTHEAST NEBRASKA EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 900 PM CDT. TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHWEST OF WICHITA KANSAS TO 55 MILES NORTHEAST OF FALLS CITY NEBRASKA. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 110...WW 111... DISCUSSION...THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY ALONG DRY LINE CENTRAL KS. WITH VERY UNSTABLE AIR MASS AND FAVORABLE SHEAR PROFILES...SUPERCELLS ARE LIKELY. ALONG WITH VERY LARGE HAIL...ISOLATED TORNADOES ARE EXPECTED. STORMS WILL MOVE NEWD OFF DRY LINE INTO ERN KS NWRN MO BY THIS EVENING. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM MOTION VECTOR 24030. ...HALES 370,0991 403,0962 403,0931 370,0961
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 1:45 AM CDT | Severe Thunderstorm Watch | SPC | Barber, Butler, Chase, Dickinson, Ellsworth, Geary and 12 more | 3 hr |
Nearby
Tornado Watches in Kansas, 2002Tornado Watches in Missouri, 2002Tornado Watches in Nebraska, 2002Every tornado 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.