Alert archive / Missouri / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 621
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 1998, 10:00 PM CDT for 17 counties in Kansas; 29 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 1998, 10:00 PM CDT (03:00 UTC)
- Expired
- Jun 20, 1998, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 46 counties
Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pettis County, MO, Pike County, MO, Platte County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO, Warren County, MO
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 10:12 PM CDT | Severe Thunderstorm Warning | EAX | Cooper | 48 min |
| Jun 19, 10:18 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee, Wabaunsee | 32 min |
| Jun 19, 10:35 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee | 30 min |
| Jun 19, 11:03 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Warren | 62 min |
| Jun 20, 12:06 AM CDT | Severe Thunderstorm Warning | EAX | Chariton, Randolph | 39 min |
| Jun 20, 12:33 AM CDT | Severe Thunderstorm Warning | EAX | Pettis | 42 min |
| Jun 20, 12:45 AM CDT | Severe Thunderstorm Warning | EAX | Randolph | 45 min |
| Jun 20, 2:52 AM CDT | Severe Thunderstorm Warning | EAX | Carroll, Lafayette | 38 min |
| Jun 20, 3:28 AM CDT | Severe Thunderstorm Warning | EAX | Carroll | 47 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 3.0 hours before the alert went out and 188 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
- 948 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 2347 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
511 WWUS9 KMKC 200240 SEL1 MKC WW 200240 KSZ000-MOZ000-200900- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 621 STORM PREDICTION CENTER NORMAN OK 940 PM CDT FRI JUN 19 1998 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHEAST KANSAS CENTRAL AND NORTHERN MISSOURI EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1000 PM UNTIL 400 AM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 160 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF SAINT JOSEPH MISSOURI TO 20 MILES WEST OF KNOB NOSTER MISSOURI. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR 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 618...WW 619...WW 620... DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN COVERAGE ACROSS PATS OF KS AND MO LATER TONIGHT AS WARM ADVECTION INTENSIFIES INVOF LEADING EDGE OF BOUNDARY LAYER MOISTURE GRADIENT. SSWLY LOW-LEVEL JET LIKELY TO INCREASE WITH TIME AS NRN PLAINS SPEED MAX CONTINUES EWD. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 520. MEAN STORM MOTION VECTOR 24030. ...CORFIDI 395,0911 384,0905 384,0965 395,0971
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 7 more | 6 hr |
| Jun 20, 3:15 PM CDT | Tornado Watch | SPC | Allen, Anderson, Atchison, Brown, Butler, Chase and 27 more | 6 hr |
| Jun 20, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 12 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 1998Severe Thunderstorm Watches in Kansas, 1998Every severe thunderstorm watch in 1998
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.