Alert archive / Missouri / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 415

June 11, 20026 counties in Kansas; 16 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2002, 10:15 PM CDT for 6 counties in Kansas; 16 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2002, 10:15 PM CDT (03:15 UTC)
Expired: Jun 12, 2002, 2:00 AM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 22 counties

Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Johnson County, KS, Linn County, KS, Miami County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Cass County, MO, Cedar County, MO, Dade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Johnson County, MO, Lawrence County, MO, Pettis County, MO, Polk County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Springfield radar (KSGF), 102 km from the middle of the area, began a volume at 03:19 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

1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 10:17 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	58 min

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.3 hours before the alert went out and 108 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1671 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1060 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 120311
SEL5  
SPC WW 120305
KSZ000-MOZ000-120700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 415
STORM PREDICTION CENTER NORMAN OK
1005 PM CDT TUE JUN 11 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   FAR EASTERN KANSAS                             
   WEST CENTRAL AND SOUTHWEST MISSOURI                           

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1015 PM
UNTIL 200 AM CDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 20 MILES EAST SOUTHEAST OF JOPLIN
MISSOURI TO 30 MILES WEST NORTHWEST 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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 411.  WATCH NUMBER 411 WILL NOT BE IN EFFECT
AFTER 1015 PM CDT.  CONTINUE...WW 413...WW 414...

DISCUSSION...TWO MESOLOWS APPARENT WITHIN ERN KS MCS ATTM...ONE
OVER DOUGLAS CNTY /SW OF OJC/...AND THE OTHER OVER LYON CNTY /NEAR
EMP/...EXPECTED TO MAINTAIN STRENGTH AS THEY MOVE EWD DURING THE
NEXT FEW HOURS.  THE STRONGEST UPDRAFTS SHOULD FOCUS INVOF OF THESE
LOWS.  GIVEN DEGREE OF INSTABILITY AND HIGH PWS...THREAT WILL
PERSIST FOR WET MICROBURSTS ALONG MESOLOW TRACKS THROUGH AT LEAST
MIDNIGHT. 

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS. 
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM MOTION
VECTOR 29030.

...CORFIDI

370,0950 385,0950 385,0930 370,0931

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 8:30 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Greeley, Lane and 11 more	6 hr
Jun 11, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barber, Barton, Butler, Chase and 38 more	5 hr
Jun 11, 11:15 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Finney, Ford, Grant, Gray, Hamilton and 8 more	3 hr
Jun 12, 4:00 PM CDT	Tornado Watch	SPC	Barber, Butler, Clark, Comanche, Cowley, Harper and 4 more	5 hr
Jun 12, 4:15 PM CDT	Tornado Watch	SPC	Atchison	5 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2002 Severe Thunderstorm Watches in Kansas, 2002 Every 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.