Alert archive / Missouri / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 186, NWS Kansas City, MO

July 20, 1996Clay County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 20, 1996, 6:31 PM CDT for Clay County, Missouri. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 20, 1996, 6:31 PM CDT (23:31 UTC)
Expired
Jul 20, 1996, 7:15 PM CDT
In force
44 min
Issued by
NWS Kansas City, MO
Area
Whole counties

County Clay County, MO

The radar

The Pleasant Hill radar (KEAX), 57 km from the middle of the area, began a volume at 23:33 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.

What was reported inside it

TimeReportWhereRemark
Jul 20, 6:45 PM CDTThunderstorm WindSmithville, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.5 hours before the alert went out and 111 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 1996-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 975 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 1996-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
975 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
627 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jul 20, 3:37 PM CDT, 2 hours 54 minutes earlier.

Area forecast discussion, Jul 20, 3:37 PM CDT, 2 hours 54 minutes before
NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
338 PM CDT SAT JUL 20 1996

SHORT TERM PROBLEM WL BE TRW RDVLPMT LT THIS AFTN INTO TNGT AS FNTL
BNDRY RMNS NRLY E CNTRL KS INTO CNTRL MO WITH MID/UPR LEVEL VORT MOVG
INTO WRN ARND 06Z...THEN THRU RMNDR OF CWA SUN MRNG.  MEANWHILE...LGT
TO MDT RW/TRW CONTG VCNTY OF ELEVATD BNDRY IN FAR NRN MO.

LATEST ADAP SHOWG MSTR CNVGNC MAX IN NE KS WITH AXIS EXTG FM NRN MO
SWWD INTO S CNTRL KS.  XPC RPD DVLPMT IN ERN KS\WRN MO BY ERY EVE...
WITH ACTVTY MOVG EWD AND ENDG BHND VORT.  FFG GEN IN THE 2.5-3.5 RNG
WITH HIER AMNTS IN SW PART OF CWA.  RNFALL AMNTS SINCE 12Z IN FAR N
FM ARND .5 MOST AREAS TO 1.5 IN ATCHISON COUNTY MO.  PER DISSCUSION
WITH STL...WL INCLUDE ENTR CWA IN FFA TNGT...THO KS PORTIONS OF KC
METRO AREA INTO SW CWA BORDERLINE.

BNDRY LIFTS NE OUT OF AREA SUN INTO SUN EVE WITH ANOTHER CDFNT APPCHG
NW MO BY MON MRNG...MOVG THRU AREA ON MON.  WL ADD SCT POPS FAR NW LT
SUN NGT AND OVR ENTR CWA MON.

MCI BB 071/087 070/087 067 7-13

DJV

In the hours before

Special weather statement, Jul 20, 1:01 PM CDT, 5 hours 30 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 8:38 PM CDTSevere Thunderstorm WarningEAXJackson37 min
Jul 20, 6:06 PM CDTSevere Thunderstorm WarningEAXPlatte44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1996Every severe thunderstorm warning in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.