Alert archive / Kansas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 92, NWS Kansas City, MO

June 11, 1997Johnson County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 1997, 8:14 PM CDT for Johnson County, Kansas. It was in force for 46 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 11, 1997, 8:14 PM CDT (01:14 UTC)
Expired: Jun 11, 1997, 9:00 PM CDT
In force: 46 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Johnson County, KS

The radar

The Pleasant Hill radar (KEAX), 49 km from the middle of the area, began a volume at 01:17 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.2 hours before the alert went out and 72 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: 833 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1485 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 120113 RRA
SVRMCI
KSC091-120200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
814 PM CDT WED JUN 11 1997

* SEVERE THUNDERSTORM WARNING FOR
    SOUTHERN JOHNSON COUNTY - EAST CENTRAL KANSAS
 
* UNTIL 900 PM CDT

* SOME LOCATIONS AFFECTED
    BONITA BY 825 PM
    STILLWELL BY 840 PM

* AT 814 PM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM NEAR CLARE OR 5 MILES SOUTHWEST OF OLATHE MOVING
  SOUTHEAST AT 25 MPH. THIS STORM HAS PRODUCED WIND GUSTS TO 70 MPH.

PEOPLE IN THE PATH OF THIS STORM CAN EXPECT ONE INCH DIAMETER HAIL
AND WIND GUSTS TO 70 MPH.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER INSIDE A STRONG BUILDING.

DJV

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 11, 2:17 PM CDT, 5 hours 57 minutes earlier.

Area forecast discussion, Jun 11, 2:17 PM CDT, 5 hours 57 minutes before

NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
217 PM CDT WED JUN 11 1997

MAIN FORECAST CHALLENGE IS PRECIPITATION CHANCES THROUGH PERIOD.
MORNING UPPER-AIR ANALYSIS SHOWS DECENT LLJ SURGING H8 MOISTURE
NORTHWARD OVER CENTRAL/HIGH PLAINS. IN THE MEANTIME...SURFACE LOW
DEVELOPING OUT OVER WESTERN NEBRASKA WITH ASSOCIATED WARM FRONT
STRETCHING SOUTHEASTWARD INTO SOUTHEAST KANSAS. -SHRA/-TSRA
ACTIVITY DEVELOPING IN WARM ADVECTION ZONE OVER FORECAST AREA AT
THIS TIME. WOULD EXPECT MORE SIGNIFICANT ACTIVITY TO DEVELOP OVER
SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS THIS AFTERNOON AND THEN
FORM INTO MCS THIS EVENING. H8-H3 FORECAST THICKNESS PATTERN
SUGGEST MCS TRACK ACROSS EASTERN KS AND WESTERN MO.

MODELS IN AGREEMENT WITH THE OVERALL FORECAST SCENARIO...BRINGING
MCS THROUGH TONIGHT AS THETAE RIDGE SHIFTS EASTWARD WITH LLJ.
BOUNDARY PUSHES TO SOUTH OF AREA BY TOMORROW. DURING THE
AFTERNOON/EVENING TOMORROW MODELS SEEM TO BE HINTING AT ANOTHER MCS
DEVELOPING A BIT FURTHER EAST AND SOUTH THAN TODAY. THE TRACK OF
THIS MCS SHOULD CLIP THE SOUTHWEST PART OF FA THURSDAY NIGHT.

GUIDANCE TEMPERATURES APPEAR TO BE IN BALLPARK...SO WILL NOT STRAY
TOO FAR.

.EAX...NONE.

MJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:03 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth	72 min

Nearby

Severe Thunderstorm Warnings in Kansas, 1997 Every severe thunderstorm warning in 1997

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.