Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 17, NWS Kansas City, MO

April 18, 1997Cooper County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 18, 1997, 9:44 PM CDT for Cooper County, Missouri. It was in force for 31 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: Apr 18, 1997, 9:44 PM CDT (02:44 UTC)
Expired: Apr 18, 1997, 10:15 PM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Cooper County, MO

The radar

The Pleasant Hill radar (KEAX), 126 km from the middle of the area, began a volume at 02:48 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.7 hours before the alert went out and 233 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: 150 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 2058 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 275 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 190244 RRA
SVRMCI
MOC053-190315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
944 PM CDT FRI APR 18 1997

* SEVERE THUNDERSTORM WARNING FOR
  COOPER COUNTY - CENTRAL MISSOURI

* UNTIL 1015 PM CDT
 
* SOME LOCATIONS AFFECTED
    OVERTON
    WOOLDRIDGE

* AT 944 PM RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES
  EAST-SOUTHEAST OF BOONVILLE MOVING EAST AT 45 MPH.

* THE STORM WILL BE IN OVERTON AT 1000 PM AND WOOLDRIDGE AT 1010 PM.
THIS STORM WILL PRODUCE HAIL TO ONE INCH IN DIAMETER AND WIND
GUSTS TO 60 MPH.

SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND DAMAGING WINDS.  FOR
YOUR  SAFETY...MOVE INDOORS AND STAY AWAY FROM WINDOWS.



MANION

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 Apr 18, 2:54 PM CDT, 6 hours 50 minutes earlier.

Area forecast discussion, Apr 18, 2:54 PM CDT, 6 hours 50 minutes before

NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
254 PM CDT FRI APR 18 1997

CONVECTIVE POTENTIAL FOR TONIGHT MAIN CONCERN FOR SHORT TERM. IN
THE LONGER TERM FORECAST PROBLEMS FOCUS ON NEXT WAVE RIDING DOWN IN
NORTHWEST FLOW SATURDAY NIGHT INTO SUNDAY. NOSE OF HIGHER SURFACE
DEWPOINTS PUNCHING UP INTO SOUTHEAST NEBRASKA THIS AFTERNOON. THIS
COMBINED WITH BOUNDARY IN VICINITY AND GOOD DIURNAL HEATING SHOULD
LEAD TO SCATTERED -TSRA DEVELOPMENT ACROSS SOUTHEAST 2/3 OF CWA
EARLY THIS EVENING. SOME CU/TCU ALREADY NOTED ON SATELLITE IMAGERY
OUT OVER NORTHWEST/NORTH CENTRAL KANSAS ALONG BOUNDARY.

FRONT MAKES IT THROUGH CWA BY MIDNIGHT...SO WOULD EXPECT ANY
PRECIPITATION THREAT TO BE OVER AFTER THIS EVENING. AIR NOT REALLY
THAT COOL BEHIND BOUNDARY SO TEMPERATURES SHOULD NOT DROP OFF TOO
MUCH TONIGHT INTO TOMORROW. MODELS IN DECENT AGREEMENT RETURNING
MOISTURE TO AREA ON SATURDAY NIGHT/SUNDAY AS NEXT SYSTEM SPINS UP
OVER HIGH PLAINS. MODELS SEEM TO BE MORE AGGRESSIVE WITH
PRECIPITATION...ESPECIALLY NGM...THAN WITH BOUNDARY PUSHING THROUGH
THIS EVENING. IN ADDITION...H8-H7 LAYER MEAN VERTICAL VELOCITY AND
H8-H7 Q-VECTOR CONVERGENCE MOVE TOWARDS/ACROSS AREA SATURDAY
NIGHT/SUNDAY.

WILL NOT STRAY TOO FAR FROM GUIDANCE NUMBERS.

MCI BT 048/067 046/063 045 99414

MJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 9:55 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette	35 min
Apr 18, 10:46 PM CDT	Severe Thunderstorm Warning	EAX	Howard	29 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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.