Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 150, NWS Kansas City, MO

June 20, 1998Henry County, Johnson County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 20, 1998, 10:35 PM CDT for Henry County, Johnson County, Missouri. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 20, 1998, 10:35 PM CDT (03:35 UTC)
Expired: Jun 20, 1998, 11:15 PM CDT
In force: 40 min
Issued by: NWS Kansas City, MO
Area: Whole counties

Counties Henry County, MO, Johnson County, MO

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 20, 7:15 PM CDT	Tornado Watch	SPC	7 hr
Jun 20, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.6 hours before the alert went out and 167 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: 4942 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1090 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 337 m²/s²
0-3 km storm-relative helicity: 629 m²/s²
Significant tornado parameter: 13.7
Supercell composite: 52.8

Open this sounding in Storm Lab

The text

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

317 
WUUS1 KMCI 210338 RRA
SVRMCI
MOC083-101-210415-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY-PLEASANT HILL MO
1035 PM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
     JOHNSON COUNTY IN MISSOURI
     HENRY COUNTY IN MISSOURI

* UNTIL 1115 PM CDT

* AT 1035 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED...A
  SEVERE THUNDERSTORM JUST EAST OF HARRISONVILLE MOVING 
  EAST-SOUTHEAST AT 20 MILES PER HOUR.

* THE SEVERE THUNDERSTORM WILL BE...
     NEAR GUNN CITY BY 1040 PM
     NEAR LATOUR BY 1045 PM
     NEAR BLAIRSTOWN BY 1055 PM

PEOPLE IN THE PATH OF THIS STORM...CAN EXPECT GOLFBALL-SIZE 
HAIL...AND WIND GUSTS UP TO 60 MPH. FOR YOUR SAFETY...MOVE 
INDOORS...AND STAY AWAY FROM WINDOWS.

$$
BB

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 2:50 AM CDT, 19 hours 45 minutes earlier.

Area forecast discussion, Jun 20, 2:50 AM CDT, 19 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
250 AM CDT SAT JUN 20 1998

CALENDAR AND VERY WARM TEMPS REMIND ME THAT IS INDEED LATE JUN
THOUGH PATTERN SURE LOOKS A LOT MORE LIKE LATE MAY.  TSRA CHCS THE
MAIN CONCERN THROUGHOUT.

LAST VESTIGES OF IMPRESSIVE WAA ACTIVITY SHD BE EXITING ERN ZONES BY
ISSUANCE TIME THOUGH WILL HAVE TO WATCH SOME REDEVELOPMENT JUST EAST
OF KC.  700 MB TEMPS WARM CONSIDERABLY TODAY WHICH SHD EFFECTIVELY
CAP EXTREMELY UNSTABLE AIRMASS UNTIL SHORT WAVE TROF AND FRONT
ARRIVE LATE IN DAY.

BY 00Z...NICE LOOKING PV LOBE ARRIVES FROM W ALONG WITH SIGNIFICANT
COOLING AT 700 AND 500 MB WHICH SHOULD ALLOW FOR EXPLOSIVE
DEVELOPMENT ALONG FRONT MOVING INTO NW MO.  THINK OUTFLOW BOUNDARY
FROM CURRENT MCS SHOULD WASH OUT DURING DAY AND WITH CAP IN
PLACE...THINK ONLY CHC FOR SEEING ANY DVLPMT DURING 1ST PD WILL BE
IN NW MO ALG FRONT.  WITH CAPES IN EXCESS OF 4K...DECENT SHEAR AND
AT LEAST 40 KT MID LEVEL WINDS...BELIEVE TONIGHT WILL BE ANOTHER
BUSY NIGHT...IF NOT BUSIER.  BETTER TORNADIC THREAT PROBABLY UP
INTO IA IN SPCS MDT RISK...BUT WITH VERY HI CAPES...CANT COUNT THE
THREAT OUT.  WILL MENTION IN AM SPS.

ALSO WITH VERY HI PWS...DAY SHIFT WILL NEED TO CONSIDER FFW
(PARTICULARLY FOR NW COUNTIES WHERE THINGS ARE STILL PRETTY
WET)...DONT WANT TO TIE THEIR HANDS YET.  ANOTHER THING TO MENTION
IN THE HAZ WX OUTLOOK.

ETA SHOWS BOUNDARY PUTTING ON THE BRAKES SOMEWHERE ACRSS SRN ZONES
FOR SUN.  WITH CAP ALL BUT GONE...WILL HAVE TO ADD DAYTIME POPS FOR
SUN.

FINALLY...FWC TEMPS LOOK WAY TOO COOL FOR TODAY.  PLAN ON RAISING
GOING FCST A CAT...AND THAT MAY EVEN BE TOO COOL AFTER LOOKING AT
FCST 850 TEMPS.  WITH TEMPS IN M90S AND DWPTS 70-75 HEAT INDEXES
WILL LIKELY MEET OR EXCEED DAYTIME HEAT ADVISORY CRIT DURING AFTN.
SHOLD DROP BELOW CRITERIA TONIGHT THOUGH.

.EAX...
MO...NONE.
KS...NONE.

JM

In the hours before

Local storm report, Jun 20, 9:53 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
953 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0915 PM    OLATHE                    KS    1 INCH HAIL
06/20/98   JOHNSON                         REPORTED BY CWSU IN
                                           OLATHE.

0937 PM    STANLEY                   KS    .88 INCH HAIL
06/20/98   JOHNSON                         DIME TO NICKEL SIZE
                                           HAIL REPORTED.

0941 PM    OVERLAND PARK             KS    .75 INCH HAIL
06/20/98   JOHNSON                         DIME SIZE HAIL REPORTED
          N                                 AT 91ST AND NALL RD.

Local storm report, Jun 20, 9:53 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
953 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0915 PM    OLATHE                    KS    1 INCH HAIL
06/20/98   JOHNSON                         REPORTED BY CWSU IN
                                           OLATHE.

0937 PM    STANLEY                   KS    .88 INCH HAIL
06/20/98   JOHNSON                         DIME TO NICKEL SIZE
                                           HAIL REPORTED.

0941 PM    OVERLAND PARK             KS    .75 INCH HAIL
06/20/98   JOHNSON                         DIME SIZE HAIL REPORTED
          N                                 AT 91ST AND NALL RD.

Local storm report, Jun 20, 10:03 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1003 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCA,TION....

0940 PM    STILWELL                  KS    1 INCH HAIL
06/20/98   JOHNSON

Local storm report, Jun 20, 10:03 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1003 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCA,TION....

0940 PM    STILWELL                  KS    1 INCH HAIL
06/20/98   JOHNSON

Local storm report, Jun 20, 10:28 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1028 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0940 PM    STILWELL                  KS    1 INCH HAIL
06/20/98   JOHNSON

1015 PM    FAIRWAY                   KS    .75 INCH HAIL
06/20/98   JOHNSON                         SMALLER THAN NICKEL
                                           SIZE HAIL REPORTED.

1015 PM    BOONVILLE                 MO    59 MPH TSTM GUST
06/20/98   COOPER                          TREES DOWN.

1019 PM    HARRISONVILLE             MO    1.75 INCH HAIL
06/20/98   CASS                            GOLFBALL SIZE HAIL
                                           REPORTED JUST NORTH OF
                                           HARRISONVILLE.

Local storm report, Jun 20, 10:28 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1028 PM CDT SAT JUN 20 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0940 PM    STILWELL                  KS    1 INCH HAIL
06/20/98   JOHNSON

1015 PM    FAIRWAY                   KS    .75 INCH HAIL
06/20/98   JOHNSON                         SMALLER THAN NICKEL
                                           SIZE HAIL REPORTED.

1015 PM    BOONVILLE                 MO    59 MPH TSTM GUST
06/20/98   COOPER                          TREES DOWN.

1019 PM    HARRISONVILLE             MO    1.75 INCH HAIL
06/20/98   CASS                            GOLFBALL SIZE HAIL
                                           REPORTED JUST NORTH OF
                                           HARRISONVILLE.

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 8:02 PM CDT	Severe Thunderstorm Warning	EAX	Platte	43 min
Jun 20, 8:57 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Platte	48 min
Jun 20, 8:57 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	48 min
Jun 20, 9:40 PM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson	35 min
Jun 20, 10:13 PM CDT	Severe Thunderstorm Warning	EAX	Cass	47 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1998 Every severe thunderstorm warning 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.